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Novel sexual dimorphism in a new genus of Bathynellidae from Russia, with a revision of phylogenetic relationships

Authors :
Ministerio de Economía y Competitividad (España)
European Commission
Australian Government
Camacho Pérez, Ana I.
Mas-Peinado, Paloma
Ierupe, Sanda
Perina, Giulia
Dorda, Beatriz A.
Casado González, Adrián
Rey, Ana
Ministerio de Economía y Competitividad (España)
European Commission
Australian Government
Camacho Pérez, Ana I.
Mas-Peinado, Paloma
Ierupe, Sanda
Perina, Giulia
Dorda, Beatriz A.
Casado González, Adrián
Rey, Ana
Publication Year :
2020

Abstract

Bathynellidae is the neglected family of Bathynellacea, a groundwater group of crus- taceans with 33 genera and 107 species described and almost half of them included in the `catch-all¿ genus Bathynella. Due to the morphological homogeneity of the spe- cies, the taxonomic uncertainties have accumulated over time. Therefore, to explore the phylogenetic relationships among taxa, a combined approach using morphologi- cal and molecular data is needed. In this paper, we performed a phylogenetic analysis based on partial sequences of COI and 18S including 30 species of Bathynellidae. This data set represents the most updated one, including a new genus and a new spe- cies (Altainella calcarata gen. n. sp. n.) of Bathynellidae described here from Altai Mountain (Russia). The new taxon presents a new type of sexual dimorphisms with a peculiar structure on the coxopod of the male thoracopod VII and also sexual dimor- phism on the mandibular palp, as some species of the subfamily Gallobathynellinae. This is the first species of Bathynellidae that presents both variants of sexual dimor- phism. The molecular phylogeny supports the morphology and the erection of the new genus and displays highly divergent genetic units corresponding to subfamilies, with the new genus closer to Bathynellinae genera than other subfamilies. With the description of this new species and its molecular characterization, the existence of the other genera beyond Bathynella is confirmed in Eurasia.

Details

Database :
OAIster
Publication Type :
Electronic Resource
Accession number :
edsoai.on1286561794
Document Type :
Electronic Resource