Simpsonichthys magnificus

Wilson J. E. M. Costa, 2007, Taxonomic revision of the seasonal South American killifish genus Simpsonichthys (Teleostei: Cyprinodontiformes: Aplocheiloidei: Rivulidae)., Zootaxa 1669, pp. 1-134: 81

publication ID

z01669p001

publication LSID

lsid:zoobank.org:pub:F23FABE8-719E-4F7E-B225-A9C5D45CCFCE

persistent identifier

http://treatment.plazi.org/id/28BE355C-B8AA-4A15-98FC-857C8E7C72EB

treatment provided by

Thomas

scientific name

Simpsonichthys magnificus
status

 

Simpsonichthys magnificus  species group

Diagnosis

Distinguished from other species groups of Simpsonichthys  ZBK  by having dark bluish gray bars alternating with red bars on anterior portion of flanks in males (secondarily dark gray bars absent and red bars present only in young males of S. adornatus  ZBK  ) (vs. never a similar color pattern).

Included species

Simpsonichthys hellneri  (Berkenkamp), S. adornatus  ZBK  Costa, S. fulminantis  (Costa & Brasil), S. carlettoi  ZBK  Costa & Nielsen, S. magnificus  (Costa & Brasil), and S. picturatus  ZBK  Costa.

Distribution

Middle rio São Francisco basin (Fig. 4).

Key to species of the S. magnificus  group

1a. Filamentous rays on tip of dorsal and anal fins short in males, reaching vertical between base and middle of caudal fin, or absent; vertically elongated minute bright blue spots at least on anterior portion of flank in males ............................................................................................................................. 2

1b. Filamentous rays on tip of dorsal and anal fins reaching posterior margin of caudal fin in males; round minute bright blue spots on flank in males ............................................................................ S. hellneri 

2a(1a). Dorsal-fin rays 19-25 in males; dorsal-fin origin on vertical between pelvic-fin base and anal-fin origin in males; all bright spots of flank vertically elongated in males; no spots on caudal peduncle in females.. ................................................................................................................................................. 3

2b(1a). Dorsal-fin rays 28-32 in males; dorsal-fin origin on vertical between pectoral-fin base and pelvic-fin base in males; anterior bright spots vertically elongated, posterior spots rounded on flank in males; two black blotches on posterior portion of caudal peduncle in females.. ......................... S. adornatus  ZBK 

3a(2a). Pectoral fins red in males; unpaired fins with transverse rows of bright blue marks in males.. ............................................................. 4

3b(2a). Pectoral fins hyaline in males; unpaired fins with bright blue lines parallel to fin rays in males. ..................................................................................... ...................................................... S. fulminantis 

4a(3a). Dorsal and anal fins rounded, without filaments, in males; black distal margin on unpaired fins in males.. .............................................................................. ..................................................................... 5

4b(3a). Dorsal and anal fins pointed, with short filaments on tip, in males; distal margin of unpaired fins without distinctive pigmentation in males.. ................ ................................................................. S. carlettoi  ZBK 

5a(4a). Flanks with 8-10 red bars in males, 18-20 brown bars in females; greenish blue dots on unpaired fins in males. ……………………………… ............. ............................................................... S. picturatus  ZBK 

5b(4a). Flanks with 5-7 red bars in males, 13-15 brown bars in females; greenish blue vermiculate transverse stripes on unpaired fins in males.. .................................................................................... S. magnificus