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Showing posts with label Brazil. Show all posts
Showing posts with label Brazil. Show all posts

Sunday, January 5, 2025

[Botany • 2024] An Overview of Astrocaryum (Arecaceae: Bactridinae) Types from Brazil described by João Barbosa Rodrigues

 

Astrocaryum described byJoão Barbosa Rodrigues

in Lima, Amorim et Almeida, 2024.  
 
Abstract
João Barbosa Rodrigues, a renowned Brazilian botanist, spent years intensively studying Orchidaceae and Arecaceae and oversaw two important institutions in Brazil: the Museu Botânico do Amazonas and the Jardim Botânico do Rio de Janeiro. However, when it comes to his taxonomic studies, there are controversies about the existence of specimens mentioned in the protologues of his new species. For example, for the palm genus Astrocaryum, several issues have arisen regarding identifying and designating nomenclatural types of the species he described. Different researchers presumed that the entire collection of types was destroyed after the Museu Botânico do Amazonas closed and due to natural disasters, that affected his collections in city of Rio de Janeiro. Thus, in this study we investigated the names of Astrocaryum described by Barbosa Rodrigues. We conducted a comprehensive investigation of Barbosa Rodrigues’ works to determine the origin and current location of the possible nomenclatural types associated with the Astrocaryum species he described. Additionally, we reviewed the designations proposed by Jan Wessels Boer and Sidney Glassman for these species in the previous century. Based on our thorough search, we confirmed the absence of the specimens mentioned in the protologues of these species. Furthermore, we substantiated the typifications made by Wessels Boer and Glassman, which were based on illustrations by Barbosa Rodrigues. Our findings confirm the assignment of six lectotypes and twelve neotypes for Astrocaryum based on the Shenzhen Code.

illustrations, lectotype, Museu Botânico do Amazonas, neotype, palms, Monocots


Gustavo Pereira LIMA, Gabriela AMORIM, Eduardo Bezerra de ALMEIDA Jr. 2024. An Overview of Astrocaryum (Bactridinae, Arecaceae) Types from Brazil described by João Barbosa Rodrigues.  Phytotaxa. 675(3); 191-216. DOI: doi.org/10.11646/phytotaxa.675.3.1

Saturday, January 4, 2025

[Ichthyology • 2024] Hypancistrus parkateje • A New Species of Hypancistrus Isbrücker & Nijssen 1991 (Siluriformes: Loricariidae) from the rapids of the middle Rio Tocantins

 

Hypancistrus parkateje
 Araújo, Ferreira, Monteiro & Wosiacki, 2024 


Abstract
The Hypancistrus genus is recognized in the Río Orinoco basin and Rio Xingu in the Guiana and Brazilian Shields, respectively. Some of its species are important in ornamental fishing. Despite this significance, many other undescribed species are still awaiting to be named. Here we describe a new species of Hypancistrus found on bedrock in the Rio Tocantins, representing an extension of the distribution of the genus. Also, a multigene phylogeny is presented to evaluate the taxonomic position of this species concerning congeners. The new species differs from all congeners by (1) hypertrophied odontodes on cheeks reaching beyond the cleithrum, (2) a supraoccipital crest conspicuously elevated, (3) a supraorbital crest slightly convex, (4) oblique bars on the anterior part of the body, (5) a dark E-shaped mark on the snout, (6) three oblique dark bars on the anterior part of the body and horizontal vermicular bars from the pectoral girdle to the posterior insertion of the dorsal fin, (7) a thin light gray bar on the posterior of the head extending across the branchial opening, (8) a tan background color, (9) a developed suspensorium with a diminished appendix in the metapterygoid, and (10) a dentary plate robust significantly fused with the angulo-articular bone. The molecular phylogenetic results show the new species forming a group with Hypancistrus zebra (Brazilian Shield—Rio Xingu) as a clade, a sister group of a monophyletic group consisting of all congeners from the Río Orinoco.

Keywords: armored catfish, molecular phylogeny, new taxon, rheophilic fish

Holotype of Hypancistrus parkateje, 64.5 mm SL (standard length),
Brazil, Pará, Bom Jesus do Tocantins, Rio Tocantins basin.

Hypancistrus parkateje


Felipe Araújo, Marlon Ferreira, Iann Monteiro and Wolmar Wosiacki. 2024. A New Species of Hypancistrus Isbrücker & Nijssen 1991 (Loricariidae, Siluriformes) from the rapids of the middle Rio Tocantins. Journal of Fish Biology.  DOI: doi.org/10.1111/jfb.15971

Thursday, January 2, 2025

[Botany • 2021] Rediscovery and Expansion of the Distribution of Phyllanthus itatiaiensis Brade (Phyllanthaceae) in southeastern Brazil


 Phyllanthus itatiaiensis Brade, 

in Mendes, Athiê-Souza, Ribeiro, Gomes, Carrijo et Sales, 2021.  

Abstract
We report here the rediscovery of Phyllanthus itatiaiensis Brade (Phyllanthaceae) after 50 years, as well as its occurrence in Minas Gerais State in southeastern Brazil. We provide a taxonomic diagnosis, in situ photographs, a distribution map, and a reassessment of its conservation status, which will contribute to our knowledge of this rare and endemic species as well as our ability to protect it.

Keywords: Atlantic domain, Biodiversity hotspot, Endemism, Phyllanthus subsect. Clausseniani, Southeastern Brazil, Taxonomy

 Phyllanthus itatiaiensis.
A, B. Habitat, with emphasis on the Pedra do Altar rock formation. C, D. Habitat. E. Staminate flower. F. Pistillate flower and fruits.
Photographs: Caio Baez (A, B); J. Külkamp (C-F).


 Jone Clebson Ribeiro Mendes, Sarah Maria Athiê-Souza, Rayane de Tasso Moreira Ribeiro, Caio Baez Gomes, Tatiana Tavares Carrijo and Margareth Ferreira de Sales. 2021. Rediscovery and Expansion of the Distribution of Phyllanthus itatiaiensis Brade (Phyllanthaceae) in southeastern Brazil. Check List. 17(2): 695-700. DOI: 10.15560/17.2.695

Monday, December 30, 2024

[Botany • 2024] Roquea multiserialis (Asteraceae: Vernonieae) • A New Genus of Lychnophorinae from Brazil and its phylogenetic placement


Roquea multiserialis Loeuille & Antar,

in Loeuille, Almeida, Siniscalchi, Lusa et Antar, 2024. 
 
Abstract
Lychnophorinae (Vernonieae, Asteraceae) consists of 21 genera and approximately 150 species, primarily distributed in the Brazilian Central Plateau, with several novelties recently described. With new botanical expeditions conducted in Serra da Formosa, state of Minas Gerais, a set of collections that belong to Lychnophorinae but were not easily assigned to a genus was discovered. After morphological and anatomical analyses and phylogenetic studies, we describe and illustrate Roquea, a new genus of Asteraceae from Brazil, to accommodate the new species Roquea multiserialis. Affinities of the new genus with other genera of Lychnophorinae are discussed along with a preliminary conservation status assessment, and notes on its distribution, ecology and affinities. This new finding contributes to the understanding of the taxonomy and evolution of Lychnophorinae and the campos rupestres and supports the urgent need to preserve Serra da Formosa, currently threatened by human activity.

campo rupestre, Compositae, endemism, Neotropical flora, taxonomy, Eudicots

Roquea multiserialis Loeuille & Antar.
A. Flowering branch. B. Detail of abaxial leaf midrib indumentum composed of stellate trichomes (some indument removed). C. Detail of adaxial leaf midrib indumentum composed of stellate trichomes. D. Capitulum. E. Longitudinal section of capitulum. F. Outer phyllary. G. Inner phyllary. H. Abnormal corolla with 8 lobes. I. Abnormal corolla opened and showing 8 anthers. J. Apex of corolla lobe. K. Anther. L. Style. M. Cypsela with a pappus.
A.–I. Illustration by Margaret Tebbs based on R.B. Almeida et al. 1070 (K).

Roquea Loeuille & Antar, gen. nov. 

Type:—Roquea multiserialis Loeuille & Antar. 

Diagnosis:—Compositarum, tribus Vernonieae, subtribus Lychnophorinae. Frutices vel arbusculae. Indumentum ex pilis variabiliter stellatis nec non eramosis compositum. Folia petiolata, vaginis semiamplexicaulibus instructa. Inflorescentiae in ramis axillaribus, capitula in corymbum disposita. Capitula 130–150-flora; squamae involucri 7–9-seriatae, imbricatae, persistentes. Corollae lilacinae ad subroseas, lobis dense villosis; antherae calcaratae, caudatae; basi stylorum non noduliferi. Cypselae prismaticae, glabrae; carpopodia obsoleta; pappus biseriatus; setae pallidae stramineae, paleaceae, saepe leviter tortiles, seriei exterioris breves, basin leviter connatae, persistentes, seriei interioris caducae. 

Etymology:—The generic name honors Dr. Nadia Roque (1970-2024), a Brazilian professor and researcher at Universidade Federal da Bahia, in Salvador, Brazil. She made outstanding contributions to the knowledge of Asteraceae, especially of Neotropical and Brazilian species. She first started her career working with the tribes Barnadesieae and Mutisieae, but soon expanded her studies to Eupatorieae and Heliantheae. She authored more than 100 scientific papers, contributed to ca. 20 book chapters as well as two books: “Asteraceae. Caracterização e Morfologia Floral” (Roque & Bautista 2008) and “A família Asteraceae no Brasil: classificação e diversidade” (Roque et al. 2017b), which have become important references for new students working in Asteraceae taxonomy in Brazil. She also advised numerous graduate students engaged in the study of Asteraceae and other families and led the treatment of Asteraceae in the collaborative project Flora e Funga do Brasil (Roque et al. 2020). 

Roquea multiserialis Loeuille & Antar.
A. Habitat. B. Habitat and habit. C. Habit. D, E. Branch in flower. F. Capitula detail.
A–F. Photos by R.B. Almeida.

Roquea multiserialis Loeuille & Antar sp. nov., adhuc unica.

Etymology:—The specific epithet refers to the high number of series of phyllaries. The Lychnophorinae taxa typically have fewer than the 7–9 series as in Roquea multiserialis.


Benoît LOEUILLE, Roberto Baptista Pereira ALMEIDA, Carolina M. SINISCALCHI, Makeli G. LUSA, Guilherme Medeiros ANTAR. 2024. Roquea, A New Genus of Lychnophorinae (Vernonieae, Asteraceae) from Brazil and its phylogenetic placement.  Phytotaxa. 675(2); 97-114. DOI: doi.org/10.11646/phytotaxa.675.2.1 
 Researchgate.net/publication/386378322_Roquea_a_new_genus_of_Asteraceae_from_Brazil 

Friday, December 27, 2024

[Botany • 2020] Paepalanthus fabianeae (Eriocaulaceae) • A New Microendemic Species from a Morphologically Coherent Clade

 

Paepalanthus fabianeae  Andrino & Sano, 

in Andrino, Simon, Quintino Faria, Moreira et Sano, 2020.

Abstract 
We describe and illustrate Paepalanthus fabianeae , a new species of Eriocaulaceae from the central portion of the Espinhaço Range in Minas Gerais, Brazil. Previous phylogenetic evidence based on analyses of nuclear (ITS and ETS) and plastid (trnL-trnF and psba-trnH) sequences revealed P. fabianeae as belonging to a strongly supported and morphologically coherent clade containing five other species, all of them microendemic, restricted to the Espinhaço range. Due to the infrageneric classification of Paepalanthus being highly artificial, we preferred not assigning P. fabianeae to any infrageneric group. Paepalanthus fabianeae is known from two populations growing in campos rupestres (highland rocky fields) in the meridional Espinhaço Range. The species is characterized by pseudodichotomously branched stems, small, linear, recurved, and reflexed leaves, urceolate capitula, and bifid stigmas. Illustrations, photos, the phylogenetic position, and a detailed description, as well as comments on habitat, morphology, and affinities with similar species are provided. The restricted area of occurrence allied with threats to the quality of the habitat, mainly due to quartzite mining, justifies the preliminary classification of the new species in the Critically Endangered (CR) category using the guidelines and criteria of the IUCN Red List.

Keywords: Campos rupestres; Poales; taxonomy

Paepalanthus fabianeae.
A, B. Habit. C, D. Involucral bracts, abaxial surface. C. External layers. D. Internal layers. E. Staminate flower. F. Staminate flower with sepals removed and the corolla margin rolled inwards G. Complete pistillate flower. H. Complete pistillate flower with detail of the gynoecium. (Faria, J. 8090, UB). 

Paepalanthus fabianeae.
 A. Flowering branch B. and C. Inflorescence detail. (Faria, J. 8090)
 
Paepalanthus fabianeae Andrino & Sano, sp. nov.


  Andrino, Caroline Oliveira; Simon, Marcelo Fragomeni; Quintino Faria, Jair Eustáquio; Luiz da Costa Moreira, André and Sano, Paulo Takeo. 2020. Paepalanthus fabianeae (Eriocaulaceae): A New Microendemic Species from a Morphologically Coherent Clade.  Systematic Botany. 45(4); 794-801. DOI: doi.org/10.1600/036364420X16033963649318

Thursday, December 26, 2024

[Crustacea • 2023] Diploexochus spinatus & D. obscurus • Cave-dwellers Diploexochus (Isopoda, Armadillidae): New Species and New Records of the Genus from Brazil

 
Diploexochus spinatus
Cardoso, Bastos-Pereira & Ferreira, 2023


Abstract
Two new species of Diploexochus are described. Diploexochus spinatus sp. nov. from Lapa do Honorato cave, located in the municipality of Iuiu, and Diploexochus obscurus sp. nov. from Água Escura I cave, located in the municipality of Carinhanha, both in the southwest of Bahia State, northeastern Brazil. Both species are likely to occur in caves due to anthropogenic impacts in the surrounding area (such as deforestation) and/or looking for the stable microclimatic conditions found in the subterranean realm. Additionally, D. echinatus is recorded in a cave in the municipality of Rurópolis, Pará State, northern Brazil. These represent the first records of the genus for subterranean environments.

Keywords: Bahia; cave species; Neotropics; terrestrial isopods; Woodlice

 
Diploexochus spinatus sp. nov.
A, Karstic area surrounding Honorato cave; B, Honorato cave; C, Tapera D’água cave;
D, Diploexochus spinatus sp. nov. from Honorato cave; E, D. spinatus sp. nov. from Tapera D’água cave.

Diploexochus obscurus sp. nov.
A, Karstic area surrounding Água Escura I cave; B, entrance of Água Escura I cave; C, conduit where the specimens were found;
D, live specimen of Diploexochus obscurus sp. nov. in lateral view; E, live specimen of D. obscurus sp. nov. in dorsal view.


Giovanna Monticelli Cardoso, Rafaela Bastos-Pereira and Rodrigo Lopes Ferreira. 2023. Cave-dwellers Diploexochus (Isopoda, Armadillidae): New Species and New Records of the Genus from Brazil.  Nauplius. 31; DOI: 10.1590/2358-2936e2023008 

Monday, December 23, 2024

[Botany • 2023] Dyckia magnifica (Bromeliaceae: Pitcairnioideae) • A New Species from Southern Brazil, and the Re-establishment of D. tomentosa, of the D. selloa complex

 


Dyckia magnifica Büneker & Mariath, 
 
in Büneker, Pastori, Almeida et Mariath, 2023. 
 
Abstract
We propose the re-establishment of Dyckia tomentosa, after rediscovering its populations, the synonymization of Dyckia polyclada, and Dyckia magnifica as a new species from southern Brazil that is morphologically related to D. tomentosa. Descriptions of external morphology, leaf anatomy and pollen morphology, and comments on species distributions and habitats are provided. The informal species complex in which D. magnifica and D. tomentosa are placed is morphologically re-circumscribed and proposed here as the “Dyckia selloa complex”.

 bromeliads, leaf anatomy, pollen morphology, taxonomy, xerophytes, Monocots

 A-L. Main diagnostic characteristics differentiating Dyckia tomentosa (A, B, E, G, I, K, M and N) and Dyckia magnifica (C, D, F, H, J, L, O and P). H.M. Büneker 607
A, B, G and I; H.M. Büneker 251 et al. E.; H.M. Büneker 721 & L. Witeck C, D, F, H, K and L. A and C. Detail of adaxial surface of a leaf spine. B and D. Detail of abaxial surface of a leaf spine. E-F. Detail of an inflorescence branch with flowers at various stages of development. G-H. Detailed lateral view of a flower at anthesis. I and J. Detail of trichomes on the surface and margins of petals. K and L. Lateral view of stigma at anthesis. M-P. Pollen under SEM. M. Detail of sulcus where the margin is observed. N. General aspect where general discontinuities in the tectum of the reticulum can be seen. O. Distal polar view where sulcus and phenomenon of harmomegathy are observed. P. Proximal polar view where the region of the tectum of the reticulum with minimal discontinuities can be seen.

 Dyckia magnifica (H.M. Büneker 616 et al.) in habitat.
A. Detail of part of the population in habitat on rocky banks of the Canoas river dammed by PCH Campos Novos. B. Vegetative habit. C. Habit when fertile. D. Detail of apical portion of the inflorescence. E. Immature capsules.

Dyckia magnifica Büneker & Mariath, sp. nov.

Etymology:—The specific epithet “magnifica”, reflects the beauty of the new species. This epithet was created and disseminated by the Dyckia cultivation enthusiast Constantino Gastaldi, who distributed specimens of it to several collectors and botanical collections under this name.


Henrique Mallmann BÜNEKER, Tamara PASTORI, Pedro Schwambach De ALMEIDA and Jorge Ernesto De Araujo MARIATH. 2023. Dyckia magnifica, A New Species of Bromeliaceae (Pitcairnioideae) from Southern Brazil, and the Re-establishment of D. tomentosa, of the D. selloa complex.  Phytotaxa. 595(2); 169-185. DOI: doi.org/10.11646/phytotaxa.595.2.4

[Botany • 2023] Barbacenia glaucescens & B. mellosilvae (Velloziaceae) • Two New remarkable Species from the Brazilian Espinhaço Range

 

Barbacenia glaucescens Ferreira-Junior & Andr.Cabral sp. nov. and 
B. mellosilvae Andr.Cabral & Ferreira-Junior sp. nov.,

in Cabral, Ferreira-Júnior et Menezes, 2023.
 
Abstract
Two new species of Barbacenia (Velloziaceae) from the Brazilian campo rupestre from the southern part of the Espinhaço Range are here described and illustrated. Both new species, Barbacenia glaucescens Ferreira-Junior & Andr.Cabral sp. nov. and B. mellosilvae Andr.Cabral & Ferreira-Junior sp. nov., resemble B. gentianoides Taub. ex Goethart & Henrard, and the second one also resembles B. longiflora Mart. However, both can be differentiated by a unique combination of morphological and anatomical characters. Morphological and anatomical descriptions, illustrations, photographs, phenological information, provisional risk assessments, distribution map, and taxonomic notes are provided for the new species.

Monocots, campo rupestre, critically endangered species, Pandanales, rock outcrops, taxonomy


 Barbacenia glaucescens Ferreira-Junior & Andr.Cabral sp. nov. 
B. mellosilvae Andr.Cabral & Ferreira-Junior sp. nov.


Andressa CABRAL, Carlos Alberto FERREIRA-JÚNIOR, Nanuza Luiza De MENEZES. 2023. Two New remarkable Species of Barbacenia (Velloziaceae) from the Brazilian Espinhaço Range in honor of Renato Mello-Silva.  Phytotaxa. 616(3); 279-287. DOI: doi.org/10.11646/phytotaxa.616.3.7 [2023-09-28]  


Sunday, December 8, 2024

[Botany • 2024] Anthurium pedrovianae (Araceae) • A New Species from the canga vegetation of the Serra dos Carajás, Pará, Brazil

 

Anthurium pedrovianae Nadruz & Camelo, 
  
in Camelo et Coelho, 2024.

Abstract
A new species of Anthurium section PachyneuriumA. pedrovianae sp. nov. is described and occurs in canga vegetation of Serra dos Carajás, Pará State, Brazil. Information on conservation status, taxonomy, habitat, geographic distribution, and phenology is provided. Morphologically, the new species is similar to A. lindmanianum but differs from that species peduncle > 3 times the size of the petiole and a spadix < 6 cm long., stipe 6.0–11.0 cm long., purple at the base at the junction with the peduncle, berries are entirely purple, obovate, brown, warty seeds. Additionally, an identification key to distinguish the Pachyneurium species present in Pará is included.

Alismatales, biodiversity, canga (ferric soil), endemism, species discovery, Monocots

Anthurium pedrovianae Nadruz & Camelo.
A. Habit showing a detail the ferric soil; detail of inflorescence at anthesis. B.Erect plant with two inflorescences. C. Elliptical leaf blade with straight margins. D. Detail of midrib and primary lateral veins prominentat the abaxial surface. E. Inflorescence erect, green peduncle, spate greenish to yellowish, patent, long stipe greenish with a dark-purpledetail at the junction at the spathe, spadix conical, purple with white pollen grains. F. Detail of spadix in anthesis. G. Spadix at pos-anthesisgrey, immature berries greenish, mature berries purple. H. Berries entire purple and tepalar filaments are absent.
Photos A–B; F—André-Cardoso; C–E, H—Luiz Otávio Adão; G—Mel C. Camelo.


Mel C. Camelo and Marcus A.N. Coelho. 2024. A New Species of Anthurium (Araceae) from the canga vegetation of the Serra dos Carajás, Pará, Brazil. Phytotaxa. 652(2); 142-148. DOI: doi.org/10.11646/phytotaxa.652.2.6  
 

Friday, December 6, 2024

[Botany • 2024] Lippia aonae (Verbenaceae: Lantaneae) • A New Species from the Espinhaço Range, Minas Gerais, Brazil


Lippia aonae Zavatin & P.H.Cardoso,  

in  Zavatin, Ramos, Salimena et Cardoso, 2024.

Abstract
Lantaneae stands out as the largest lineage within the Verbenaceae, and advancing systematic and taxonomic studies within this tribe is crucial to clarify the circumscription of non-monophyletic genera and elucidate its species richness. In Brazil, the taxonomic knowledge of Lantaneae is still in progress, particularly regarding the genera Lantana and Lippia. Here, we describe Lippia aonae, a new species from the campos rupestres of the Espinhaço Range, Cerrado domain, in the north of Minas Gerais state. It is a subshrub 0.4‒0.6 m tall, with viscous and aromatic leaves, inflorescences with small bracts and corollas, and drupaceous fruits. A detailed description, illustrations, comparison with morphologically related species, and a geographical distribution map are provided for its recognition. Following the IUCN criteria, Lippia aonae can be considered as Vulnerable (VU).

Keywords: campos rupestres; conservation; endemism; Flora of Brazil; Lamiales

Lippia aonae
 (A) Habit. (B) Magnification of the adult branch. (C-D) Branch with inflorescence. (E) Leaf, adaxial surface. (F) Leaf, abaxial surface. (G-I) Inflorescence, showing peduncle, bracts, and corollas. (J) Magnification of the inflorescence. (K) Corolla lobes, frontal view. (L) Dissected fruit.
Voucher: Zavatin et al. 2085. Photos: D.A. Zavatin (A-K) and L.J. Sauthier (L).  

Lippia aonae.
(A) Branch with inflorescence. (B) Detail of the young branch. (C) Leaf, adaxial surface. (D-E) Leaves, abaxial surface. (F) Detail of petiole and leaf base, adaxial surface. (G) Detail of the leaf abaxial surface, showing sessile glandular trichomes. (H) Inflorescence. (I) Bract, abaxial surface. (J) Magnification of the bract vestiture. (K) Corolla. (L) Bracts and fruits. (M) Fruit within the accrescent calyx. (N) Fruit, accrescent calyx removed.
Voucher: Zavatin et al. 2085. Drawn by Suzana Souza.

Lippia aonae Zavatin & P.H.Cardoso, sp. nov.

Diagnosis: A species more similar to Lippia raoniana P.H.Cardoso & Salimena, but differs by being a smaller plant, with non-sulcate branches, leaves with shorter petioles and blades, orbicular, ovate, or obovate, with glabrescent adaxial surface, lustrous in vivo, and bracts with longer and spreading hairs along the margins, sericeous on the adaxial surface.

Etymology: The specific epithet is an homage to our dear friend, Dr. Lidyanne Yuriko Saleme Aona Pinheiro, an exceptional Brazilian botanist whose career is dedicated to studying Commelinaceae and Cactaceae. Lidyanne currently holds the position of a professor at Universidade Federal do Recôncavo da Bahia and curator of the HURB herbarium. This tribute represents a form of gratitude for Lidyanne’s significant contributions to Brazilian botany.


Danilo Alvarenga Zavatin, Renato Ramos, Fátima Regina Gonçalves Salimena and Pedro Henrique Cardoso. 2024. A New Species of Lippia (Verbenaceae) from the Espinhaço Range, Minas Gerais, Brazil.  Acta Bot. Bras. 38; DOI: doi.org/10.1590/1677-941X-ABB-2024-0024    

Wednesday, December 4, 2024

[Botany • 2021] Lippia raoniana (Verbenaceae) • Checklist and A New Species of Lippia from the Diamantina Plateau, Minas Gerais, Brazil


Lippia raoniana P.H.Cardoso & Salimena

in Cardoso, Neto, Trovó et Salimena, 2021. 

Abstract
The Diamantina Plateau is located in the central region of the Espinhaço Range, in the State of Minas Gerais, which is dominated by campo rupestre formations. We describe a new species of Lippia L., endemic to the Diamantina Plateau, and provide an annotated checklist and identification key for the 17 species of the genus occurring in the area. Lippia raoniana P.H.Cardoso & Salimena sp. nov. is mainly distinguished by its ovate leaves with adaxial and abaxial surfaces densely covered by sessile glandular trichomes, and drupaceous fruits with two pyrenes. It is known only from two populations, and thus can be provisionally considered as Critically Endangered. Details on the species’ ecology, as well as a comparison with morphologically similar species, a distribution map, and field photographs, are provided. In this work, we also present pictures of the 17 species in their habitats, and we hope that these illustrations will help in the identification and conservation of these taxa.

Keywords: endangered species, endemism, Espinhaço Range, Lamiales, Lantaneae

Lippia raoniana P.H.Cardoso & Salimena sp. nov.
A. Habit. B–C. Branch with inflorescence. D.  Inflorescence  frontal  view.  E-G.  Drupaceous  fruit.  E.  Overview.  F.  Longitudinal  section  showing  two pyrenes. G. Cross section showing two pyrenes and seeds.
Scale bars: E–G = 1 mm. Photos: A–D by Pedro Henrique Nobre; E–G by Nádia Silvia Somavilla.

Class Magnoliopsida Brongn.
Order Lamiales Bromhead

Family Verbenaceae J.St.-Hil.

Genus Lippia L.

Lippia raoniana P.H.Cardoso & Salimena sp. nov.

Diagnosis: The new species is similar to Lippia spiraeastrum (Mart. & Schauer) T.R.S.Silva, but differs by ovate leaves (vs oblong or oblong-elliptic), slightly discolorous (vs strongly discolorous), matte adaxial surface (vs shiny), glandular abaxial surface (vs tomentose-glandular), shorter peduncle (0.8‒1.3 vs 3.2‒10.5 cm long) and slender (vs thick), ovate bracts (vs lanceolate). 

Etymology: The specific epithet is in homage to Raoni Metuktire, an important indigenous leader of Brazil, internationally known as a symbol of environmental preservation. Raoni is dedicated to the fight for the rights of native indigenous people and conservation of the tropical forest, mainly Amazonia. His legacy is a symbol of the daily struggle for Brazilian biodiversity, constantly threatened.
 

Pedro Henrique Cardoso, Luiz Menini Neto, Marcelo Trovó and Fátima Regina Gonçalves Salimena. 2021. Checklist and A New Species of Lippia (Verbenaceae) from the Diamantina Plateau, Minas Gerais, Brazil. European Journal of Taxonomy 73342-55. DOI: doi.org/10.5852/ejt.2021.733.1219

Tuesday, December 3, 2024

[Ichthyology • 2024] Pseudacanthicus nyktos • A New Species of Pseudacanthicus (Siluriformes: Loricariidae) from the rio Xingu, Amazon, Brazil


Pseudacanthicus nyktos
  Lopes, Sousa & Chamon, 2024


Abstract
The genus Pseudacanthicus encompasses eight recognized species so far: P. histrix, P. serratus, P. spinosus, P. fordii, P. leopardus, P. pitanga, P. pirarara, P. major. Only P. pirarara has been formally described from the rio Xingu basin. To address this gap in taxonomic knowledge of the region, a new species of the Pseudacanthicus is described here, aimed at enhancing our understanding of the genus within the rio Xingu basin and contributing to conservation efforts. The new species is primarily found downstream the impact zone of the Belo Monte Hydroelectric Power Plant. It can be promptly diagnosed from congeners by the color pattern of the body dark brown to black with light gray vermicular spots on the dorsal and ventral surfaces, and fins; lower maximum number of teeth in premaxilla and dentary; and other osteological characters. It’s worth noting that the ichthyofauna of the Amazonian drainages lacks comprehensive taxonomic and biological information regarding Pseudacanthicus. In this context, unchecked anthropogenic activities are leading to changes in the ecosystem, often resulting in the extinction of species even before they are scientifically addressed.

Keywords: Acanthicus clade; Amazon basin; Ancistrini; Conservation; Taxonomy

Holotype of Pseudacanthicus nyktos, INPA-ICT 060701, 190.18 mm SL, rio Xingu, Vitória do Xingu.
A. Dorsal view; B. Lateral view; C. Ventral view.

Ventral view of mouth and barbels of Pseudacanthicus nyktos. Specimen not preserved.
Premaxillary and dentary teeth of a skeletonized paratype of Pseudacanthicus nyktos (LIA 8173, 154 mm SL).
 
Pseudacanthicus nyktos, new species

Diagnosis: Pseudacanthicus nyktos differs from all congeners by a dark brown to black body with light gray vermicular spots on the dorsal and ventral surfaces, and fins (vs. body with dark gray to dark brown background with black dots or spots and fins with intense orange to red color in P. leopardus, P. pitanga and P. pirarara; body and fins with dark gray background color and white dots or spots in P. serratus and P. fordii, more conspicuous in ventral region; body with a gray color and black dots or spots in P. histrix and P. spinosus; and body with a dark brown color without spots or dots; with white transverse bars on the dorsal and caudal fins ...  

Etymology: The specific epithet nyktos derives from Greek meaning “night”, in allusion to the dark color of the specimens in comparison with other species of the genus and also to the deep locations where they can be found, where there is no light. An adjective.

  Body shape and color in life of Pseudacanthicus nyktos shown to scale.
 Specimens not preserved. Scale bars = 1 cm.


Maria Letícia Batista Galvão Lopes, Leandro Melo de Sousa and Carine Cavalcante Chamon. 2024. New Species of Pseudacanthicus (Siluriformes: Loricariidae) from the rio Xingu, Amazon, Brazil.  Neotrop. ichthyol. 22(3) • 2024 • DOI: 10.1590/1982-0224-2024-0033 www.scielo.br/j/ni/a/XHfLffzyJxq445HxZs4bnkF 

Saturday, November 30, 2024

[Botany • 2024] Lorostemon roseoviridis (Clusiaceae) • A New Species from the eastern Amazonia


 Lorostemon roseoviridis  Fer.-Silva & L.Marinho,
  
in Ferreira-Silva, Marinho, Mouzinho et Hopkins, 2024. 
Photo by H.D. Clarke  

Abstract
During the review of the Brazilian species of Lorostemon (Clusiaceae), we verified that some specimens previously reported as L. bombaciflorus Ducke for South Guyana and the Brazilian Eastern Amazonia belong to a species still unknown to science. Here, we provide a description, taxonomic comments, illustrations, and a distribution map of Lorostemon roseoviridis Fer.-Silva & L.Marinho, a new species from eastern Amazonia.

Keywords: Diversity, Flora, Guttiferae, Lorostemon roseoviridis, Symphonieae

Open flower of Lorostemon roseoviridis.
Photo by H.D. Clarke from the holotype, H.D. Clarke 7160.

Lorostemon roseoviridis Fer.-Silva & L.Marinho, sp. nov. 

TYPE: Guyana: Upper Takutu-Upper Essequibo Region. Acarai Mts., summit of unnamed peak, ...

Etymology. The epithet refers to the predominant colors found in the flowers and derives from the Latin roseus (pink) and viridis (green). Ducke (1935) published the first species name in the genus as "L. bombaciflorum", indicating that Lorostemon would be neuter, but Art. 62.2 (a) of the ICN (Turland et al., 2018) states that compound generic names ending in -stemon are masculine.



Silvia Larissa Ferreira-Silva, Lucas C. Marinho, Thiago M. Mouzinho and Michael J. G. Hopkins. 2024. A New Species of Lorostemon (Clusiaceae) from the eastern Amazonia. Brittonia. 76, 132–136. DOI: doi.org/10.1007/s12228-024-09791-1

Friday, November 29, 2024

[Botany • 2024] Wedelia figueiredoana (Asteraceae: Heliantheae) • A winged cypselae New Species of Wedelia for Brazil


Wedelia figueiredoana V.R.Bueno,

in Bueno, Rodrigues, Sousa, Souza, Marzinek et Marques, 2024. 

Abstract
We describe one new species from Ceará state, Brazil: Wedelia figueiredoana. It is morphologically associated with W. bonplandiana, but distinguished by 0.25–1.05 cm leaf blade width (vs. 1.5–2.6 cm), linear to narrow oblong leaf blade (vs. elliptic to spatulate), 3-seriate involucre (vs. 2-seriate), and cypselae 3.9–4 mm long (vs. 6–7 mm). An anatomical analysis of cypselae is provided, and we propose a more accurate terminology to describe similar wings to Wedelia species. We also provide a scientific illustration of the new species, photos of habitat, a map of its geographic occurrence, and its taxonomic affinities are discussed with a taxonomic key to the Wedelia species with the apically pronounced wings in the cypselae.

Key words: Auricular projections, Cerrado, Compositae, fruit anatomy

Wedelia figueiredoana sp. nov.
A linear blade leaf B head (top view) C flowering branch D head and phyllaries (side view) E habit.

Wedelia figueiredoana sp. nov. habitat
A enclaves of Cerrado B Wedelia figueiredoana in the ferrugineous soil C floral visitor in the W. figueiredoana D prostrate habit E solitary herbaceous individual of W. figueiredoana.

 Wedelia figueiredoana V.R.Bueno, sp. nov.

Diagnosis: Wedelia figueiredoana morphologically resembles W. bonplandiana by 0.25–1.05 cm leaf blade width (vs. 1.5–2.6 cm), linear to narrow oblong leaf blade (vs. elliptic to spatulate), 3-seriate involucre (vs. 2-seriate), and cypselae 3.9–4 mm long (vs. 6–7 mm).

Etymology: The epithet “figueiredoana” is in honor of Dr. Marlene Feliciano Figueiredo, born in 1963, a dedicated educator at Universidade Estadual Vale do Acaraú (UVA). Her dynamic engagement in teaching, research, and outreach, notably the Pensando Verde project, has left an indelible mark. Noteworthily, she was pivotal in founding and curating the Herbário Francisco José de Abreu Matos–HUVA (1998–2004), a vital botanical resource in Northwest Ceará. In botanical research, Figueiredo specializes in phanerogam taxonomy, floristics, ethnobotany, and seed germination ecophysiology, fostering a deep understanding of Northwestern Ceará’s intricate flora through her mentorship.


Vinicius R. Bueno, Leonardo S. Rodrigues, Francisco Diego Sousa, Izaías C. Souza, Juliana Marzinek and Danilo Marques. 2024. Wedelia figueiredoana (Asteraceae, Heliantheae), A winged cypselae New Species of Wedelia for Brazil. PhytoKeys. 249: 37-49. DOI: doi.org/10.3897/phytokeys.249.135699