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| Peckoltia kahxi Dopazo, Araújo, Akama & Wosiacki, 2026 |
Abstract
A new species of Peckoltia is described from the rio Trombetas basin, Pará State, Brazil. The new species was investigated by morphological and molecular dataset and it can be distinguished from its congeners by: (1) mottled appearance, without defined spots or patches on the head and body, (2) partially naked abdomen with clusters of plates on the lateral sides of the abdomen from the pectoral to the pelvic region, (3) higher numbers of teeth on both jaws, (4) short odontodes in the cheek, (5) dark spots on the interradial membranes on all fins, (6) four saddles along the body, (7) lower lips with rounded papillae, (8) yellow stripes of the head obliquely positioned on head, not larger than eye orbit, (9) upper lip completely dark, and (10) dorsal margin of the hyomandibula concave. Genetic analysis revealed a genetic divergence of 2.3 to 15% between the new species and other species of the genus. Additionally, phylogenetic analysis based on a mitochondrial gene (Cytb) was conducted and the species was recognized as a monophyletic unit. The description of the new species contributes to the knowledge of the Trombetas River basin, a little-known tributary on the left bank of the Amazon River.
Keywords: Amazon basin; Ancistrini; Armoured catfish; Rheophilic species; Taxonomy
Peckoltia kahxi, new species
Manuela Dopazo, lFelipe Arian de Andrade Araújo, Alberto Akama and Wolmar Benjamin Wosiacki. 2026. A New Species of Peckoltia (Siluriformes: Loricariidae) from the rapids of rio Trombetas Basin, Brazil. Neotrop. ichthyol. 24(3); DOI: doi.org/10.1590/1982-0224-2026-0053