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Hyphessobrycon amapaenis spec nov, a new putative representative species of Hyphessobrycon heterorhabdus from the Amapa Territory, Brazil

Zarske, A.; Gery, J.

Zoologische Abhandlungen 50: 19-26

1998


ISSN/ISBN: 0375-5231
Accession: 031759621

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A new species of characid fish, Hyphessobrycon amapaensis spec. nov., is described from the Amapa Territory, Brazil. The new species is a member of the heterorhabdus-group and is closely related with Hyphessobrycon heterorhabdus (ULREY, 1894) and Hyph. agulha FOWLER, 1914. The new species differs from Hyphessobrycon heterorhabdus (ULREY, 1894) in the dentition (maximally with two teeth, one tricuspid and one conical compared with four conical teeth in Hyph. heterorhabdus, one tricuspid and one conical compared with four conical teeth in Hyph. heterorhabdus, dentary with five to six tricuspid and four to five conical teeth compared with four four- to tricuspid and three to four conical teeth in Hyph. heterorhabdus), in the number of branched anal rays (18 to 20 compared with 21 to 23 in Hyph. heterorhabdus), in a lower number of scales- in a longitudinal row (30 to 32 compared with 32 to 34 in Hyph. heterorhabdus), in a lower number of gill-rakers (13 to 17 compared with 19 in Hyph. heterorhabdus) and a different colouration. Hyphessobrycon amapaensis spec. nov. has in life a carmine red longitudinal band from the gill cover to the root of caudal fin and a horizontally humeral spot. Hyphessobrycon heterorhabdus has a tri-banded longitudinal colour pattern (red, gold and black in life) from the gill cover to the caudal root. There is no extension of the lateral pattern on the middle rays of the caudal fin in both species. The longitudinal pattern in Hyphessobrycon agulha (in life a red brown one) extends onto the tips of the middle rays of caudal fin.

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