Papers by Riccardo Mugnai
Sincerely yours, We trust all of you are well, safe and healthy in these unprecedented times. We ... more Sincerely yours, We trust all of you are well, safe and healthy in these unprecedented times. We are very happy to contact you to let you know that our project is now coming to completion. With more than 1.2 million described species, the Arthropoda represent the most speciose group of animals on Earth, with a remarkable number of species still undescribed. These invertebrates are recognized as playing important ecological roles in terrestrial, marine, and freshwater ecosystems, also through their impact on humans, by causing crop damage or acting as vectors for disease transmission. Some of them are also excellent indicators of ecosystem integrity and are extremely important in environmental assessment studies. Otherwise, they are being thretened by the ongoing climatic crises with effects we still do not know enough. Hence, the book we were able to build is of great relevance because the use of specic sampling methods and techniques is crucial to understand their biodiversity, dy...
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Crustaceana, 2020
The preparation of specimens is a crucial aspect of zoological studies. Some specific study techn... more The preparation of specimens is a crucial aspect of zoological studies. Some specific study techniques or certain taxonomic groups require staining processes. However, an excessive exposure to the staining agents can turn a specimen improper for morphological studies. Here, we report that an excess of chlorazol black, one of the most used stains in biology, can be easily removed from crustacean specimens with a solution of methanol and Extran ® detergent or, less effectively, with a solution of methanol and commercial dishwashing soap.
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Comparative Parasitology
abstract: In northeastern Brazil, studies related to freshwater fish macroparasites are incipient... more abstract: In northeastern Brazil, studies related to freshwater fish macroparasites are incipient. This paper presents 2 new records for cymothoid isopods plus a territory extension for a third species, all in Maranhão State, Northeast Brazil.
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European Journal of Taxonomy
The genus Disparalona Fryer, 1968 comprises a well-defined species complex, the hamata-group, whi... more The genus Disparalona Fryer, 1968 comprises a well-defined species complex, the hamata-group, which might have sibling species in South America. This hamata-group needs urgent revision. Besides that, a complete morphological evaluation of the endemic species D. leptorhyncha (Daday, 1905) is lacking. Thus, the aim of the present study is to revise populations of species of the hamata-group in South America and to redescribe D. leptorhyncha. Our findings pointed to an occurrence of species which are part of the Disparalona (Mixopleuroxus) linage. Currently, the Neotropics have the highest diversity to the genus, with three species of the hamata-complex – D. (M.) hamata (Birge, 1879), D. (M.) lucianae sp. nov., D. (M.) tenuispina sp. nov. – in addition to D. (M.) leptorhyncha. These species can be differentiated from each other by the morphology of their rostrum, labrum, and postabdomen.
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Tropical Zoology
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Biota Neotropica
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Zootaxa, 2015
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Oecologia Brasiliensis, 2008
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Saude Ambiente Em Revista, Jan 21, 2009
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Tropical Zoology
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Pan-American Journal of Aquatic Sciences
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Journal of Insect Science
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Brazilian Journal of Biology
The hyporheic zone (HZ), as the connecting ecotone between surface- and groundwater, is functiona... more The hyporheic zone (HZ), as the connecting ecotone between surface- and groundwater, is functionally part of both fluvial and groundwater ecosystems. Its hydrological, chemical, biological and metabolic features are specific of this zone, not belonging truly neither to surface- nor to groundwater. Exchanges of water, nutrients, and organic matter occur in response to variations in discharge and bed topography and porosity. Dynamic gradients exist at all scales and vary temporally. Across all scales, the functional significance of the HZ relates to its activity and connection with the surface stream. The HZ is a relatively rich environment and almost all invertebrate groups have colonized this habitat. This fauna, so-called hyporheos, is composed of species typical from interstitial environment, and also of benthic epigean and phreatic species. The hyporheic microbiocenose consists in bacteria, archaea, protozoa and fungi. The HZ provides several ecosystem services, playing a pivotal...
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Brazilian Journal of Biology
In the Neotropical Region, information concerning hyporheic communities is virtually non-existent... more In the Neotropical Region, information concerning hyporheic communities is virtually non-existent. We carried out a sampling survey in the hyporheic zone of the Tijuca River, in the Tijuca National Park, located in the urban area of the city of Rio de Janeiro. Biological samples from the hyporheic zone were collected in three different stream reaches, in June 2012. The main objectives were: 1) to describe the structure of invertebrate assemblages in the hyporheic zone of a neotropical stream; 2) to apply a reach-scale approach in order to investigate spatial patterns of the hyporheic assemblages in relation to hydrology, depth and microhabitat typology. A total of 1460 individuals were collected and identified in 31 taxa belonging to Nematoda, Annelida, Crustacea, Hydrachnidia and Insecta. The class Insecta dominated the upper layer of the hyporheic zone. Copepods were the most abundant taxon among crustaceans and occurred mostly in the upwelling areas of the reaches. The results of...
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PLOS ONE, 2015
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A zona hiporréica é constituída pelos espaços intersticiais entre as partículas do álveo e é deli... more A zona hiporréica é constituída pelos espaços intersticiais entre as partículas do álveo e é delimitada superiormente pela água superficial e inferiormente pela água subterrânea. A fauna presente, constituída por quase todos os grupos de invertebrados, é denominada hiporreos e ainda é desconhecida nas Américas Central e do Sul. O objetivo desse trabalho é apresentar a fauna e definir os fatores que determinam a distribuição da fauna na zona hiporréica. O material foi coletado em um riacho do Parque Nacional da Tijuca, Rio de Janeiro. A coleta foi realizada utilizando uma bomba tipo Bau-Rouch utilizando minipiezómetros enterrados em diferentes profundidades (-10; -25; -45 cm) e localizados em 4 microhabitats distintos. Cada amostra de 5 litros de tamanho. O material foi preservado em álcool 75% e levado para o laboratório, onde foi realizada uma coloração seletiva com rosa bengala e triagem em lupa. As amostras de água foram analisadas e foram determinados 21 parâmetros físico-químic...
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Brazilian Journal of Biology, 2013
Brazil faces a challenge to develop biomonitoring tools to be used in water quality assessment pr... more Brazil faces a challenge to develop biomonitoring tools to be used in water quality assessment programs, but few multimetric indices were developed so far. This study is part of an effort to test and implement programs using benthic macroinvertebrates as bioindicators in Rio de Janeiro State. Our aim was first to test the Multimetric Index for Serra dos Órgãos (SOMI) for a different area - Serra da Bocaina (SB) - in the same ecoregion. We sampled 27 streams of different sizes and altitudes in the SB region. Despite the environmental similarities, results indicated biological differences between reference sites of the two regions. Considering these differences, we decided to develop an index specific for the SB region, the Serra da Bocaina Multimetric Index (MISB). We tested twenty-two metrics for sensitivity to impairment and redundancy, and six metrics were considered valid to integrate the MISB: Family Richness, Trichoptera Richness, % Coleoptera, % Diptera, IBE-IOC index, EPT / C...
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Papers by Riccardo Mugnai