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| Platydoras birindellii Sousa, Chaves, Akama, Zuanon & Sabaj, 2017 |
Abstract.
A new species of Platydoras is described from the rio Xingu Basin, Brazil. Platydoras birindellii is distinguished from congeners by having gas bladder simple (vs. with posterior secondary chamber) and dorsal and caudal fins uniformly dusky (vs. with distinct marks composed of dark broad band or blotch on central portion of dorsal fin and pair of dark broad stripes on caudal fin, one central to each lobe). Platydoras birindellii shares a simple gas bladder with the sister taxon to Platydoras, Centrochir crocodili, a monotypic genus endemic to the Magdalena Basin. With respect to the caudal skeleton, the parhypural is incompletely fused to hypurals 1+2 in P. birindellii, a condition that is intermediate between those of Centrochir (parhypural typically separated from hypurals 1+2 by distinct suture) and Platydoras (parhypural typically fully fused to hypurals 1+2). Platydoras birindellii is commonly found in rocky clearwater rapids and apparently endemic to the middle and upper portions of the Xingu draining the Brazilian Shield.
Keywords: Amazon basin, taxonomy, gas bladder morphology, caudal skeleton
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| Live photos of Platydoras birindellii, n. sp. from rio Xingu, Pará State, Brazil. A. INPA 57507 [ex LIA 1296] (77.5 mm SL, holotype), Pedra Preta, São Félix do Xingu, .., 22 Sep 2014, L.M. Sousa, A. Gonçalves & C. Martins. B. ANSP 199617 (103 mm SL, paratype), Cachoeira do Espelho, .., M.H. Sabaj et al. Photos by L.M. Sousa (A) and M.H. Sabaj (B). |
Platydoras birindellii n. sp.
Diagnosis.—Platydoras birindellii is easily diagnosed
from all congeners by having gas bladder simple (vs. with
secondary bladder) and dorsal and caudal fins uniformly
dusky (vs. with distinct marks composed of dark blotch or
broad band on central portion of dorsal fin and pair of dark
broad stripes on caudal fin, one central to each lobe).
Etymology.—Species name honors our colleague
and friend José Luís Olivan Birindelli, for enriching
our knowledge of doradid catfishes and inspiring the
next generation of Neotropical ichthyologists with his
enthusiasm and integrity.
Leandro M. Sousa, Mateus S. Chaves, Alberto Akama, Jansen Zuanon and Mark Henry Sabaj. 2017. Platydoras birindellii, New Species of Striped Raphael Catfish (Siluriformes: Doradidae) from the Xingu Basin, Brazil. Proceedings of the Academy of Natural Sciences of Philadelphia. 166(1); 1-13. DOI: 10.1635/053.166.0106
Researchgate.net/publication/325992376_Platydoras_birindellii_new_species_of_striped_raphael_catfish_from_the_Xingu_Basin_Brazil
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