Papers by Gabriela Cuezzo
Biological Invasions
The movement of species is among the most serious environmental threats of the new millennium, as... more The movement of species is among the most serious environmental threats of the new millennium, as the transplantation of species beyond their native or historical range has intensified in the last five decades. Traditionally, studies on bioinvasions have focused on species that have been introduced, deliberately or accidentally, to biogeographic regions where they did not previously occur. However, less attention has been given to species movement to novel areas within the same biogeographic region. Our research group, the South America Introduced Molluscs Specialists, analyzed potential cases of native South American mollusc species introduced deliberately or accidentally beyond their natural range within South America. To achieve this, it is key to differentiate between anthropogenic processes and passive responses to environmental conditions. We considered the past and current spatial distribution of species, analyzed known or putative vectors, and discuss the impacts of taxonomic and nomenclatural knowledge. Based on the evidence currently available, we propose different scenarios to explain observed changes in mollusc distributions within South America. Seventeen transplanted mollusc species (TMS) were recognized, considering marine, freshwater, and terrestrial environments. Of the 189 South American ecoregions 31 were occupied by transplanted species, but this proportion varied by environment: 10 of 28 marine ecoregions, 12 of 52 freshwater ecoregions, and 9 of 109 terrestrial ecoregions. The ecoregions with TMS are generally located in the peripheral zones of the continent. Those with the highest number of TMS were the Southern Caribbean (three species) in the marine environment, the Central Andean Pacific Slopes (three species) in the freshwater environment, and the Alto Paraná Atlantic forests (two species) in the terrestrial environment. The number of unintentionally moved TMS is greater than those moved intentionally. The transplantation process is similar to the introduction and settlement process of non-native mollusc species, and so is their impact.
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Asociación Argentina de Malacología, Jul 26, 2019
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Figure 1. A,B,C: character 1 (0,1,2), peristomal teeth. A, Solaropsis heliaca: Lip without tooth.... more Figure 1. A,B,C: character 1 (0,1,2), peristomal teeth. A, Solaropsis heliaca: Lip without tooth. B. Pleurodonte badia: Basal lip teeth, basal tooth (bt). C. Isomeria sp.: palatal tooth (pt). D,E: character 2 (1,2), Basal internal teeth. D. Pleurodonte sinuosa: 1–4 with vertical indentations (i) in shell wall. E. Labyrinthus raimondii: 1–3 with diagonal to horizontal indentations (i). Division of the aperture into four general zones is illustrated.
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Figure 5. A,B,C: character 17, head wart. A. S-shaped. B. Transverse slit. C. Small round patch o... more Figure 5. A,B,C: character 17, head wart. A. S-shaped. B. Transverse slit. C. Small round patch of pustules. D–F: character 18, genital orifice. D. Position of the genital orifice (go) in the head. E. Round-like orifice. F. Oval-like orifice. H–L: character 25, flagellum. G. Long, thin, and even, like in Zachrysia. H. Flagellum in Polydontes. I. Flagellum in Labyrinthus and Eurycratera. J. Flagellum in Pleurodonte. K. Flagellum in Solaropsis. L. Flagellum in Australian genera except for Sinulomeloninae.
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FIGURES 28–31: Labyrinthus tarapotoensis. 28: General view of the jaw, scale bar= 100 m. 29: Deta... more FIGURES 28–31: Labyrinthus tarapotoensis. 28: General view of the jaw, scale bar= 100 m. 29: Detail of the central and first lateral teeth of a row, scale bar= 10 m. 30: Marginal teeth, scale bar= 10 m. 31: Detail of a marginal tooth, scale bar= 1 m.
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Thorp and Covich's Freshwater Invertebrates, 2019
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Zoologischer Anzeiger, 2021
Abstract A new species of Succinea Draparnaud, 1801, S. puna sp. nov., from the Puna highlands in... more Abstract A new species of Succinea Draparnaud, 1801, S. puna sp. nov., from the Puna highlands in Catamarca Province, Argentina, is described. Seventeen water bodies were surveyed in the Puna ecoregion of Catamarca, with gastropods being found only at two localities, El Penon and Guanchin River. We explored the morphological features of shells, reproductive system, radulae, and mandibles of specimens from each site. Although we found slight differences in the shell and the terminal genitalia, with specimens exhibiting an epiphallus folding over itself with terminal globular appearance, whereas others with an epiphallus cylindrical, we conclude that these are intraspecific variabilities. We used DNA sequences of the 16S-rRNA gene to explore genetic distances and genealogical relationships among both populations and other species of Succinea. We found maximum genetic interpopulation distances of up to 2.38%. Mean interspecific divergences among S. puna sp. nov. and other Succinea species ranged between 7.14% and 15.21%. A secondary structure model of domains IV and V of the 16S-rRNA gene was developed, with polymorphic sites being concentrated in loop regions. A GIS analysis was carried out using a selection of bioclimatic variables to characterize the environment of the new species in comparison to other close Succinea species from South America. The analysis showed that the particular environmental conditions of the Puna in Catamarca are hardly present in other zones of South America, supporting our hypothesis that S.puna is endemic to that area. The restricted distribution of S. puna sp. nov. in a single ecoregion with extreme climatic and physiographic characteristics, high altitude habitat and its microhabitat specialization, makes this species potentially vulnerable to impacts of future anthropogenic changes.
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Biological Invasions, 2020
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Zootaxa, 2006
The Camaenid genera Labyrinthus Beck, 1837 and Isomeria Beck, 1837 are mainly distributed in nort... more The Camaenid genera Labyrinthus Beck, 1837 and Isomeria Beck, 1837 are mainly distributed in northern South America. Current anatomical information available for both genera is scarce, particularly that concerning Isomeria species. The morphology of the pallial organs, genital and digestive systems of three species of Labyrinthus [L. subplanatus (Petit, 1843), L. dunkeri (Pfeiffer, 1852), L. tarapotoensis Moricand, 1858] and a new species of Isomeria are described. The morphology of hooked denticles that topped wall ridges inside penis and vagina in some species of Labyrinthus and in Isomeria are species-specific characters, differing in shape and size. These structures were not sufficiently studied either in Isomeria or in Labyrinthus and are absent in all anatomically studied species of Solaropsis Beck, 1837, their sister genus. The presence of a bursa copulatrix sac reflexed over its duct is a character shared by all Labyrinthus species in which soft anatomy is known, and it was...
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PeerJ, 2018
BackgroundLand gastropods of the Dry Chaco merit special attention because they comprise a highly... more BackgroundLand gastropods of the Dry Chaco merit special attention because they comprise a highly diverse but barely studied group.ClessiniaDoering, 1875 are typical inhabitants of this ecoregion. The inclusion of their distribution areas intoSpixiarange, their shell shape similarities, and a former molecular study raised doubts on the monophyly of this genus. The present study review the species ofClessinia, under a morphological, geometric morphometrics, and molecular combined approach.MethodsAdults were collected, photographed, measured, and dissected for anatomical studies. Shell ultrastructure was studied with scanning electron microscope. Geometric morphometric analyses on shells were performed testing if they gave complementary information to anatomy. Two mitochondrial genes, and a nuclear region were studied. Phylogenetic reconstructions to explore the relationships of DNA sequences here obtained to those ofClessiniaandSpixiaspecies from GenBank were performed.ResultsSpecies...
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Anais da Academia Brasileira de Ciencias, Jan 19, 2018
A detailed anatomical revision on Solaropsis brasiliana (Deshayes 1832) has been carried out. New... more A detailed anatomical revision on Solaropsis brasiliana (Deshayes 1832) has been carried out. New characters on shell, anatomy of soft parts, and a review of the genus distribution in South America, as well as clarification on S. brasiliana distributional area are provided in the present study. Solaropsis brasiliana is diagnosed by its globose, solid, and hirsute shell, with periphery obsoletely angular, bursa copulatrix with a thick, long diverticulum, a thick, long flagellum and a penis retractor muscle forked, with the vas deferens passing through it. This compiled information was used to test the phylogenetic position of S. brasiliana within South American Pleurodontidae through a cladistics analysis. In the phylogenetic hypothesis obtained, S. brasiliana is sister group of S. gibboni (Pfeiffer 1846) and the monophyly of the genus Solaropsis Beck is also supported. Here, we sustain that the distribution of S. brasiliana is restricted to Brazil, inhabiting the States of Rio de Ja...
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American Malacological Bulletin
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American Malacological Bulletin
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Zootaxa
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Molluscan Research
Discovery of an established population of Sinotaia quadrata (Benson, 1842) in a river and reservo... more Discovery of an established population of Sinotaia quadrata (Benson, 1842) in a river and reservoir in Argentina is reported,representing the first report of a Recent viviparid species in South America. Viviparids are a family of freshwater snails occurring nearly worldwide. A study of the shell and aspects of the anatomy of S. quadrata are presented. It is distinguished from other native taxa by its large shell size, presence of a blackish axial band on the columellar side of the aperture and two to three carina on the body whorl. The invasive species Physa acuta Draparnaud, 1805 (Physidae) and Corbicula fluminea (Müller,1774) (Corbiculidae) also inhabit the same sites as Sinotaia quadrata. Co-occurring native species of molluscs are Pomacea canaliculata (Lamarck, 1822) (Ampullariidae) and Biomphalaria tenagophila (d´Orbigny, 1835) (Planorbidae). This record increases the total number of invasive gastropods in Argentina to six.
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Check List, 2015
This is the first record of Epiphragmophora estella in Argentina, a species traditionally of Boli... more This is the first record of Epiphragmophora estella in Argentina, a species traditionally of Bolivian distribution. Specimens were found during several field trips conducted in the northern patch of the Southern Andean Yungas forest of Salta province. Morphometrics and qualitative shell characters are described in order to validate the taxonomic identification. Current species distribution is also reported.
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Revista de Biología Tropical, 2009
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Zoomorphology, 2011
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Zoological Journal of the Linnean Society, 2003
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Papers by Gabriela Cuezzo