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Type: Article
Published: 2023-09-12
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On a new genus and four new species of the subfamily Cyprettinae (Crustacea, Ostracoda) from Brazilian floodplains

State University of Maringá (UEM); Centre of Biological Sciences (CCB); Department of Biology (DBI); Graduate Program in Ecology of Inland Water Ecosystems (PEA). Av. Colombo; 5790; CEP 87020-900. Maringá; PR; Brazil
State University of Maringá (UEM); Centre of Biological Sciences (CCB); Department of Biology (DBI); Graduate Program in Ecology of Inland Water Ecosystems (PEA). Av. Colombo; 5790; CEP 87020-900. Maringá; PR; Brazil; State University of Maringá (UEM); Centre of Biological Sciences (CCB); Centre of Research in Limnology; Ichthyology and Aquaculture (Nupélia). Av. Colombo; 5790; CEP 87020-900. Maringá; PR; Brazil
Freshwater Biology; OD Nature; Royal Belgian Institute of Natural Sciences; Vautierstraat 29; 1000 Brussels; Belgium; Department of Biology; Ghent University; K.L. Ledeganckstraat 35; 9000 Ghent; Belgium
Crustacea Neotropical comparative morphology non-marine ostracods new taxa

Abstract

We describe the new genus Triangocypretta gen. nov. and four new species from Brazilian floodplains. Triangocypretta angustus gen. et spec. nov. and Triangocypretta labiata gen. et spec. nov. were described from the Amazon floodplain only, while Triangocypretta nates gen. et spec. nov. was described from Amazon, Araguaia, and Paraná River floodplains. Triangocypretta hirsuta gen. et spec. nov. was recorded from all four floodplains: Amazon, Araguaia, Pantanal and Paraná. The new genus is characterized by the triangular shape of the carapace in lateral view, the absence of teeth on the posteroventral inner list in the right valve and the presence of anterior marginal septa in both valves, as well as by the relatively short and thin α and β-setae on the mandibular palp. All populations found were asexual. Owing to the clear differences in valve anatomy and limb chaetotaxy as compared to species of Cypretta s.s., the four species were allocated to a new genus in the subfamily Cyprettinae.

 

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