Simpsonichthys multiradiatus
Simpsonichthys multiradiatus (Costa & Brasil, 1994)
Simpsonichthys multiradiatus is a species of killifish in the family Rivulidae. It is found in the middle Tocantins River basin of Brazil. It is endemic to the middle Tocantins River basin in central Brazil, specifically occurring in the drainage of the Rio Paranã. Its habitat consists of temporary pools formed during the rainy season in the Cerrado biome.
Descriptions from checklists and floras indexed by GBIF
description
Description Morphometric data appear in Table 7. Largest specimen examined 46.4 mm SL. Dorsal profile concave on head, convex from nape to end of dorsal-fin base, nearly straight on caudal peduncle. Ventral profile convex from lower jaw to end of anal-fin base, approximately 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 and anal fins pointed in males, rounded in females; median anal-fin rays long in females, anal fin spatula-shaped. Tip of dorsal and anal fins with filamentous rays in males, tips reaching vertical through center of caudal fin. Caudal fin subtruncate in males, round in females. Pectoral fins elliptical. Posterior margin of pectoral fin reaching vertical between base of 3 rd and 7 th anal-fin ray in males, and between urogenital papilla and base of 2 nd anal-fin ray in females. Tip of each pelvic fin reaching base of 1 st anal-fin ray in males and reaching urogenital papilla in females. Pelvic-fin bases medially in close proximity. Dorsalfin ori
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
diagnosis
Diagnosis Distinguished from all other species of the S. flammeus group by having numerous rays in dorsal and anal fins (dorsal-fin rays 25 - 28 in males, 17 - 21 in females, vs. 18 - 23 in males, 13 - 18 in females; anal-fin rays 23 - 28 in males, 21 - 24 in females, vs. 20 - 24 in males, 18 - 22 in females).
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
distribution
Distribution Middle rio Tocantins floodplains, Estado do Tocantins, central Brazil (Fig. 4).
Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae).
materials_examined
Material examined Brazil: Estado do Tocantins, rio Tocantins drainage, rio Amazonas basin: MNRJ 12519, holotype, male, 32.9 mm SL; MNRJ 12520, 9 paratypes; MZUSP 46080, 8 paratypes; UFRJ 2074, 7 paratypes (c & s); UFRJ 2075, 6 paratypes; UFRJ 2076, 8 paratypes; UFRJ 2097, 63; UMMZ 230858, 12; MCZ 138938, 2; temporary pool in Brejinho de Nazare; W. J. E. M. Costa, G. C. Brasil & C. M. C. Santos, 15 Feb. 1994.
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
From the GBIF Backbone Taxonomy and occurrence records (GBIF.org), with Wikipedia and the Source Library. GBIF species 2349181.