More than just the number of denticles: morphometric and limb variability Neotropical cladoceran Alonella dadayi (Crustacea: Cladocera: Chydoridae)

Autor(es)

Sousa, Francisco Diogo R. ^{[1, 2]} ; Elmoor-Loureiro, Lourdes M. A. ^[1] ; Maia, Sarah Souza ^[1] ; Panarelli, Eliana A. ^[3]

Afiliação do(s) autor(es)

^[1] UFJ, Unidade Acad Especial Ciencias Biol, Tab Taxon Anim, BR 364 Km 195 3800, BR-75801615 Jatai, Go - Brazil

^[2] Univ Brasilia UnB, Programa Posgrad Zool, Campus Univ Darcy Ribeiro, BR-70910900 Brasilia, DF - Brazil

^[3] UEMG, Av Mario Palmerio 1001, Bloco 2, BR-38200000 Frutal, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Zootaxa; v. 4759, n. 2, p. 287-299, APR 2 2020.
• Citações Web of Science: 0

Resumo

The aim of this study is to describe the limb morphology of Alonella dadayi Birge (Cladocera: Chydorida) and this species' morphometric variability regarding the carapace and postabdomen. We report for the first time a population whose individuals do not have denticics on the postcroventral corner of the carapace. Although we have observed intraand interpopulation variability of the limbs (especially the proportion of Inner Distal Lobe setae), Alonella dadayi can also be differentiated from closely related species by the morphology of the exopodite of the second limb. The morphometric analyses show high variability in the shape of the carapace, when regarding the ventral margin and posterodorsal corner. In the postabdomcn, we observed a significant variation in the preanal, anal and postanal margins. Keeping in mind the wide range of the geographic distribution ofAlonella dadayi and its high morphological variability, it is possible that this taxon comprises a species complex. Such a chance needs to be tested in future studies. (AU)

• Processo FAPESP: 10/52318-6 - Biodiversidade de microcrustáceos de água doce em campos rupestres
• Beneficiário: Carlos Eduardo Falavigna da Rocha
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular