Simpsonichthys alternatus
Simpsonichthys alternatus (Costa & Brasil, 1994)
Descriptions from checklists and floras indexed by GBIF
description
Description Morphometric data appear in Table 7. Largest specimen examined 38.8 mm SL. Dorsal profile straight to slightly concave on head, convex from nape to end of dorsal-fin base, about 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 dorsolateral portion of side of head. Snout blunt. Urogenital papilla cylindrical and short in males, pocket-shaped in females. Tip of dorsal fin pointed in males, rounded in females; distal border of anal fin rounded in both sexes; median anal-fin rays long in females, anal fin spatula-shaped. Tip of dorsal fin with short filamentous rays in males, tips reaching vertical through caudal-fin base; no filamentous rays on anal fin. Caudal fin subtruncate in males, round in females. Pectoral fins elliptical. Posterior margin of pectoral fins reaching vertical through base of 6 th anal-fin ray in males, and between base of 1 st and 3 rd anal-fin rays in females. Tip of pelvic fins reaching between base of 3 rd and 4 th anal-fin ray in males and reaching urogenital papilla in
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
diagnosis
Diagnosis Similar to S. delucai and S. fasciatus, and distinguished from the remaining species of the S. flammeus group by possessing a distal red bar on caudal fin in males (vs. broad metallic blue bar), a red distal stripe on anal fin in males (vs. no distinctive distal stripe), short to minute filamentous rays on tip of dorsal fin in males (vs. long filaments), and anal fin rounded in males (vs. pointed); differs from S. delucai by having dorsal fin pointed in males (vs. rounded to slightly pointed), dorsal fin with 6 - 8 bars through whole fin in males (vs. bars restricted to posterobasal portion of fin), and reddish gray bars on the side of body in males (vs. dark brown to black bars); differs from S. fasciatus in having dorsal-fin origin in vertical between base of 3 rd and 5 th anal-fin rays (vs. anterior to anal-fin base or in vertical between base of 1 st and 2 nd anal-fin rays) and red distal stripe on dorsal fin in males (vs. dark gray to black).
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
distribution
Distribution Rio Paracatu floodplains, rio Sao Francisco basin, Estado de Minas Gerais, Brazil (Fig. 4).
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
materials_examined
Material examined Brazil: Estado de Minas Gerais, rio Paracatu drainage, rio Sao Francisco basin: MNRJ 12523, holotype, male, 22.7 mm SL; MNRJ 12524, 2 paratypes; MZUSP 46082, 3 paratypes; UFRJ 2129, 1 paratype; UFRJ 3457, 9; MNHN 1997.0048, 6; UMMZ 231545, 6; Brasilandia, Joao Pinheiro; G. C. Brasil, 1 May 1994. UFRJ 2130, 11 paratypes; UFRJ 2131, 4 paratypes (c & s); same locality; G. C. Brasil, 1 Jun. 1994. UFRJ 4636, 25; same locality; W. J. E. M. Costa, D. Belote, G. Neves & D. Almeida, 10 Apr. 1998. UFRJ 4750, 4; same locality; D. Nielsen & A. Carletto, 1 May 1996.
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
Where it has been recorded
Recorded sightings
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geo-referenced records in GBIF, from museums, herbaria and field observers.
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In the stacks
Searching the stacks…
Every page naming Simpsonichthys alternatus in the Biodiversity Heritage Library →
From the GBIF Backbone Taxonomy and occurrence records (GBIF.org), with Wikipedia and the Source Library. GBIF species 2349217.