Simpsonichthys perpendicularis
Simpsonichthys perpendicularis Costa, Nielsen & de Luca, 2001
First described in: Costa, W. J. E. M.; Nielsen, D. T. B.; de Luca, A. C. (2001). Quatro novos rivulídeos anuais do gênero Simpsonichthys (Cyprinodontiformes) das bacias dos rios São Francisco e Pardo, Brasil. <em>Aquarium (Brasil).</em> 4(26): 24-31.
Descriptions from checklists and floras indexed by GBIF
biology_ecology
Habitat The type locality is a temporary pool within an area where the original forest was destroyed, in a cattle area. Simpsonichthys perpendicularis was not found elsewhere and is considered a vulnerable species (Costa, 2002).
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
description
Description Morphometric data appear in Table 1. Largest male examined 43.3 mm SL. Dorsal profile slightly concave on head, convex from nape to end of dorsal-fin base, approximately straight on caudal peduncle. Ventral profile convex from lower jaw to end of anal-fin base, nearly straight on caudal peduncle. Body moderately deep, compressed, greatest body depth at level of pelvic-fin base. Eye positioned on lateral portion of head. Snout blunt to slightly pointed. Urogenital papilla cylindrical and short in males, pocket-shaped in females. Tip of dorsal fin weakly pointed in males, rounded in females; tip of anal fin rounded in both sexes. Tip of both dorsal and anal fins with filamentous rays in males, the longest dorsal-fin filaments reaching posteriorly to vertical through middle of caudal fin; tip of anal-fin filaments reaching vertical through base of caudal fin. Dorsal-fin rays unbranched. Caudal fin rounded. Pectoral fins elliptical. Posterior margin of each pectoral fin reaching vertical through base of 4 th anal-fin ray in males and between pelvic-fin base and anus in females. Tip of each pelvic fin reaching base of 3 rd or 4 th anal-fin ray in males and between urogenital
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
diagnosis
Diagnosis Distinguished from all other congeners by the unique color pattern in males, consisting of bars on anterior half and three stripes on the posterior half of flank. It is also distinguished from the other species of Ophthalmolebias in possessing more gill-rakers on the first branchial arch (4 + 14, vs. 2 - 4 + 11) and more dorsal-fin rays in females (16 - 18, vs. 13 - 16).
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
distribution
Distribution Known only from the type locality, ribeirao do Salto floodplains, middle rio Jequitinhonha basin, Estado da Bahia, northeastern Brazil (Fig. 4).
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
In the stacks
From the GBIF Backbone Taxonomy and occurrence records (GBIF.org), with Wikipedia and the Source Library. GBIF species 2349204.