Navegando por Autor "FERREIRA, RODRIGO L."
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- Anophtalmic and epigean?Description of an intriguing new species of Hyalella (Amphipoda, Hyalellidae) from Brazil(Magnolia Press, 2018) BASTOS-PEREIRA, RAFAELA; OLIVEIRA, MARCUS PAULO ALVES DE; FERREIRA, RODRIGO L.The absence of eyes in Hyalella (Hyalellidae, Amphipoda) is typical of obligate groundwater-dwelling species. However, a new intriguing blind amphipod of this genus was found in epigean streams from the Iron Quadrangle (state of Minas Gerais, Brazil). Hyalella troglofugia sp nov. presents antenna 1 shorter than antenna 2, gnathopod 1 propodus inner face with four setae, gnathopod 2 propodus posterior margin longer than palm, dactylus slightly longer than palm, pereopod 5 shorter than others and uropod 3 shorter than telson. The absence of eyes and presence of reduced U3 and pereopods of H. troglofugia sp nov. may suggest that such species also inhabits interstitial subterranean spaces. Moreover, the presence of the new species on streams associated to distinct hydrological zones indicates that this species may be present in dif-ferent types of subterranean habitats of the region. We hypothesize that at least part of the population of this species may have left the subterranean environment looking for food and when out of this habitat it preferentially inhabits high water flow stretches of the stream in function of predation avoidance.
- Spelaeobochica goliath (Arachnida: Pseudoscorpiones: Bochicidae), a new troglo-bitic pseudoscorpion from Brazil(Magnolia Press, 2018) VIANA, ANA CLARA M.; SOUZA, MAYSA F. V. R.; FERREIRA, RODRIGO L.Spelaeobochica goliath sp. n., found in a limestone cave located in the municipality of Ibiracatu (Minas Gerais, Brazil), is described. It can be distinguished from the other species of the genus mainly by the slight angular shape of the anterior margin of the carapace, distal position of the trichobothrium est relative to st on the movable finger, isb in a position much nearer to level of sb than to that of esb, and by its pedipalpal measurements and proportions. It shares many morphological features with S. iuiu.
- 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.
- Spelaeogammarus uai (Bogidielloidea: Artesiidae): a new troglobitic amphipod from Brazil(Magnolia Press, 2017) BASTOS-PEREIRA, RAFAELA; FERREIRA, RODRIGO L.A new species was recently found in a cave from Southeastern Brazil, in the state of Minas Gerais, which is here described. Considering all the species of the genus, Spelaeogammarus uai sp. nov. is very similar to S. santanensis and S. sanctus, although the new species differs mainly in relation to the number of plumose setae in the apical margin of maxilliped inner plate, number of setae in the anterior margin of gnathopod 1 basis and number of setae in the posterior margin of gnatho-pod 2 basis. Furthermore, the ratio “length/width” of several articles of the new species is higher than in other species. An identification key of the Spelaeogammarus genus is provided, as well as a complemented multivariate statistical approach of the morphometry of the genus based on a previous work of the genus.