CECAV
URI permanente desta comunidadehttps://bdc.icmbio.gov.br/handle/cecav/1
Centro Nacional de Pesquisa e Conservação de Cavernas
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Item Environmental factors structuring the assemblage of aquatic insects in an epigean and hypogean stretch of a Neotropical karst stream(2021-02-01) Martins, V. M.; Ferreira, R. L.The aim of the present study was to identify which variables structure the assemblage of aquatic insects in the subterranean environment, because knowledge about how subterranean communities are structured in rivers with hypogean sections is still emerging. In addition to identifying whether the hypogean assemblage is structured in the same way as the epigean assemblage, we sought to identify whether the environmental restrictions caused by the subterranean habitat resulted in reduced species richness and abundance compared with the epigean habitat. We sampled a 345-m stretch of a stream in Brazil and collected aquatic insects from both the epigean and hypogean environments. In the stream stretch investigated, there was a positive relationship between richness and the percentage of immersion, fine substrate and organic matter, and a negative relationship between richness and conductivity. We also verified differences between the epigean and hypogean environments regarding composition. The variables that best explained the overall assemblage structure included the epigean–hypogean environment and the percentage of coarse and fine substrate. Given the differences between these environments, we emphasise the need for management actions in karst regions that consider the discontinuity of these regions’ river communities to conserve all components of diversity.Item Uma nova espécie troglobiótica de Allochthonius (subgênero Urochthonius) (Pseudoscorpiones, Pseudotyrannochthoniidae) do Japão(2021-01-20) Viana, Ana Clara Moreira; Ferreira, Rodrigo LopesAllochthonius (Urochthonius) yoshizawai sp. nov., found in Hiura-do Cave, a limestone cave located in the municipality of Kumakogen, Ehime Prefecture, Japan, is described. It can be distinguished from the consubgeneric species mainly by the carapacal chaetotaxy (6–2, 18), by the presence of 6 setae on the cheliceral palm, by the rallum with 11 blades, by the presence of 8 clavate coxal blades on coxae I, and by the decreased number and distinct shape of the chelal teeth. A redescription of the subgenus Urochthonius, and keys to the subgenera of Allochthonius and to the species and subspecies of Urochthonius are also provided, as well as some ecological remarks, a brief discussion on troglomorphisms for the subgenus, and potential threats for this species.Item The first record of Adelosgryllus Mesa & Zefa, 2004 (Orthoptera: Grylloidea: Phalangopsidae) from caves, with the description of a new species from Brazil(2004) MERLO, RAYANNE LAYS SANT’ANA; CASTRO-SOUZA, RODRIGO ANTÔNIO; JUNTA, VITOR GABRIEL PEREIRA; FERREIRA, RODRIGO LOPESThe first species for the genus Adelosgryllus Mesa & Zefa, 2004 recorded in caves is herein described. We used the morphology of the phallic complex as the main criteria to differentiate this species from the congeneric ones. In addition, we discussed the natural history of the new species, some aspects of its association to the cave habitats, and the intraspecific variation of the right tegmen observed in two populations of this new species.Item Mammal Taphonomy in a Cave Deposit From Quaternary of Brazil(2022-03-03) Trifilio, Lucas Henrique Medeiros da Silva; de Araújo-Júnior, Hermínio Ismael; Porpino, Kleberson de Oliveira; Barbosa, Fernando Henrique de SouzaIn Brazil, the Quaternary caves of the Brazilian Intertropical Region (BIR) host important fossiliferous deposits of terrestrial vertebrates, whose fossil content is taxonomically well known. Here, we conducted a taphonomic analysis based on macroscopic and microscopic features of 543 specimens collected in the F3 cave, a fossiliferous deposit located in the municipality of Baraúna, northeast of Brazil. This deposit encompasses 17 taxa, but it is dominated by fossils of Eremotherium laurillardi. Most bones were buried in less than a year, but the taphonomic history of this deposit was governed by alternation of dry and wet cycles. This led us to recognize four taphonomic modes, that differ according to the climatic conditions in which the bones were preserved as well as the time interval between the accumulation and the final burial of the remains.Item Coarazuphium auleri sp. n. (Carabidae: Zuphiini), a new troglobitic ground-beetle in Central-Western Brazil(2021-12-12) Pellegrini, Thais Giovannini; Bichuette, Maria Elina; Vieira, LetíciaABSTRACT In this paper, we describe Coarazuphium auleri sp. n. Until now, the species occurred in a single limestone cave, located at Nobres municipality (state of Mato Grosso – Central-Western Brazil). The new species comprises an apterous species from the genus Coarazuphium with the complete absence of hindwings, eyes are composed of very reduced eyes-scars, depigmentation and ommatidia are not evident. We also provide an updated key for species identification of Coarazuphium from the most recently published one. We followed the criteria of IUCN and classified the species as Critically Endangered – CR, IUCN criteria B1ab(iii)+2ab(iii), since the species has a restricted geographical distribution; estimated occurrence length <100 km2; population in few locations and with a continued decline in area, extent, and quality of habitat. According to Brazilian law, the existence of a critically endangered species places the Lagoa Azul cave as one of maximum relevance.- Environmental factors structuring the assemblage of aquatic insects in an epigean and hypogean stretch of a Neotropical karst stream(2021-02-01) M. Martins, V.; L. Ferreira, R.The aim of the present study was to identify which variables structure the assemblage of aquatic insects in the subterranean environment, because knowledge about how subterranean communities are structured in rivers with hypogean sections is still emerging. In addition to identifying whether the hypogean assemblage is structured in the same way as the epigean assemblage, we sought to identify whether the environmental restrictions caused by the subterranean habitat resulted in reduced species richness and abundance compared with the epigean habitat. We sampled a 345-m stretch of a stream in Brazil and collected aquatic insects from both the epigean and hypogean environments. In the stream stretch investigated, there was a positive relationship between richness and the percentage of immersion, fine substrate and organic matter, and a negative relationship between richness and conductivity. We also verified differences between the epigean and hypogean environments regarding composition. The variables that best explained the overall assemblage structure included the epigean–hypogean environment and the percentage of coarse and fine substrate. Given the differences between these environments, we emphasise the need for management actions in karst regions that consider the discontinuity of these regions’ river communities to conserve all components of diversity.
- Environmental factors structuring the assemblage of aquatic insects in an epigean and hypogean stretch of a Neotropical karst stream(2021-02-01) M. Martins, V.; L. Ferreira, R.The aim of the present study was to identify which variables structure the assemblage of aquatic insects in the subterranean environment, because knowledge about how subterranean communities are structured in rivers with hypogean sections is still emerging. In addition to identifying whether the hypogean assemblage is structured in the same way as the epigean assemblage, we sought to identify whether the environmental restrictions caused by the subterranean habitat resulted in reduced species richness and abundance compared with the epigean habitat. We sampled a 345-m stretch of a stream in Brazil and collected aquatic insects from both the epigean and hypogean environments. In the stream stretch investigated, there was a positive relationship between richness and the percentage of immersion, fine substrate and organic matter, and a negative relationship between richness and conductivity. We also verified differences between the epigean and hypogean environments regarding composition. The variables that best explained the overall assemblage structure included the epigean–hypogean environment and the percentage of coarse and fine substrate. Given the differences between these environments, we emphasise the need for management actions in karst regions that consider the discontinuity of these regions’ river communities to conserve all components of diversity.
Item Coarazuphium lundi (Carabidae: Zuphiini), a new Brazilian troglobitic beetle, with the designation of a neotype for C. pains Álvares & Ferreira, 2002(2020-11) GIOVANNINI PELLEGRINI, THAIS; LOPES FERREIRA, RODRIGO; DE ALMEIDA ZAMPAULO, ROBSON; VIEIRA, LETÍCIAIn this paper, we describe Coarazuphium lundi sp. nov., from a single male specimen collected in Gruta 06L cave located in the municipality of Prudente de Morais (Minas Gerais state, Brazil). The two most striking differences between C. lundi and other species of the genus is the presence of two pairs of posterior supraorbital setae and the elytra shape with parallel, not rounded sides. Coarazuphium pains Álvares & Ferreira 2002 is an endemic species restricted to a few caves at the Bambuí Carbonatic Group in the midwest of Minas Gerais state, Brazil. The holotype of C. pains was unfortunately lost in 2010, due to a fire that destroyed almost the entire zoological collection at the Butantã Institute, São Paulo state in Brazil. In recent years, several species of the genus have been described and compared to C. pains only based on its paper description, clearly prompting the need for the C. pains neotype designation. In order to provide a necessary standard for comparison, a neotype is designed for this species based on the material collected from the best approximation of the type locality (caves). Lastly, we also provide a brief discussion on the presence of eyespots of C. cessaima, originally described as blind.- Five new species of Phalangopsis Serville, 1831 (Orthoptera: Phalangopsidae) from Brazilian caves in the Amazon Forest(2020-10-06) PEREIRA JUNTA, VITOR GABRIEL; CASTRO-SOUZA, RODRIGO ANTÔNIO; LOPES FERREIRA, RODRIGOThe current work presents the description of five new cricket species for the genus Phalangopsis Serville, 1831 found in Brazilian caves in the Amazonas, Mato Grosso and Pará states, northern Brazil. The morphology of the phallic complex was used as the main criterion for distinguishing the species. In addition, we present data on the natural history and ecology of the new species as well as hypothesis about the variations of tegmina size in relation to the subterranean lifestyle for the genus. Finally, we provide a pictorial key based on adult males for the Phalangopsis species.
- Spelaeobochica mahnerti, a new cave-dwelling pseudoscorpion from Brazil(Arachnida: Pseudoscorpiones: Bochicidae), with comments on the troglomorphism of the Brazilian bochicid species(2020-02-04) VIANA, ANA CLARA M.; FERREIRA, RODRIGO L.Spelaeobochica mahnerti sp. n., found in a limestone cave located in the municipality of Monjolos (Minas Gerais state, Southeastern Brazil), is described. It differs from congeneric species mainly by the rallum with 3 apically dentate blades, the position of the trichobothrium ib in the far distal half of the hand dorsum (near the base of fixed finger), the smooth subterminal setae, and by the arolia that are a little longer than the claws. A key to the species of Spelaeobochica is provided, as well as information on the habitat and threats for this new species. We further discuss troglomorphic traits in Brazilian species of Bochicidae.