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| Parotocinclus pukuixe Silva-Junior and Angela M. Zanata. 2022 |
Abstract
A new species of Parotocinclus is described from lower rio Pardo basin, Bahia, Brazil. The new species differs from the majority of its congeners by the presence of a rudimentary or vestigial adipose fin, restricted to one to three small unpaired plates on the typical location of the fin. The new species differs from congeners that lack a well-developed adipose fin, and also from various other congeners, by a series of features including the absence of unicuspid accessory teeth and abdomen completely covered by plates similar in size. Additionally, mature males of the new species possess hypertrophied and a higher number of olfactory lamellae, when compared to similar-sized or even larger females. Hypertrophied and higher number of olfactory lamellae in males is shared with the congeners from the north-eastern Mata Atlântica freshwater ecoregion examined to the feature.
Keywords: Cascudinho, north-eastern Mata Atlântica freshwater ecoregion, sexual dimorphism, Siluriformes, taxonomy
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| Parotocinclus pukuixe, holotype. MZUSP 126858, 36.4 mm LS, female, Brazil, Bahia State, Camacan, Fazenda Tupinambá, rio Braço do Sul, tributary of rio Panelão, ..., 200 m a.s.l., 18 Out 2013, A. M. Zanata, T. Ramos, L. Oliveira & T. Duarte |
Parotocinclus pukuixe, new species
Etmology: The specific name derives from the word ‘pukuixê’, from the Pataxohã language used by the native Pataxó Indigenous tribe. The Pataxó tribe historically occupies the south and extreme south coastal areas of Bahia State. Pukuixê means ‘the first’ and is used herein in allusion to the species being the first of the genus having the rio Pardo as its type locality. A noun in apposition.
Dario E. Silva-Junior and Angela M. Zanata. 2022. A New Species of Parotocinclus (Loricariidae: Hypoptopomatinae) from the rio Pardo basin, Bahia State, Brazil, with comments on the sexually dimorphic traits of the nares and olfactory lamellae. Journal of Fish Biology. 101(6); 1582-1590. DOI: 10.1111/jfb.15235
