Collected near Florencia, Rio Caqueta basin
Ventral view; Florencia, Rio Caqueta basin
Habitat: Rio Caqueta basin, Florencia
Topotype; Rio Caqueta
Topotype; Rio Caqueta
Close-up of head, Dorsal view
Close-up of pectoral fin
Preserved specimen - lateral view
Ventral view of mouth
|All Fishes Data Sheet|
|Scientific Name||Chaetostoma platyrhynchus (Fowler, 1943)|
|Type Locality||Florencia, Río Orteguasa basin, Colombia.|
|Synonym(s)||Chaetostoma platyrhyncha, Chaetostoma platyrhynchus, Cordylancistrus platyrhyncha, Hemiancistrus platyrhynchus, Peckoltia platyrhyncha, Peckoltia platyrhynchus|
|Pronunciation||KATE oh STOW mah|
|Etymology||Greek, chaite = hair + Greek, stoma = mouth.|
|Size||95mm or 3.7" SL. Find near, nearer or same sized spp.|
|Identification||The genus Chaetostoma is not straightforward to identify, but as a general rule, the species has spines behind the gill-cover (interopercular odontodes), no plates on the abdomen, and aside from C. platyrhynchus also lack plates on the snout edge. Different from Ancistrus by not having fleshy tentacles on the snout.
Holotype: Color in alcohol dull olive-brown, under surface paler or light grayish. Dorsal with membranes grayish. Caudal brownish and with 4 dark parallel gray-brown transverse bands, though all inclined and parallel with hind caudal edge. Paired fins brown, with indistinct and obscure brown spots on rays. Iris gray. Paratypes: Most uniform brown. Some vary with obscure markings, an occasional specimen with 3 obscure transverse darker bands on the caudal or a submarginal diffuse dark grayish band, and in addition sometimes a faint gray blotch below middle of each ray.
|Sexing||The males have however a larger and broader head, slimmer ventral sides and disproportionately large pelvic fins. Perhaps the over-sized pelvic fins play a large role in the fertilization of the eggs. By inverting these over the clutch of eggs, they prevent the sperm cells being carried away by fast water current.|
|Distribution||Upper Caquetá River basin in upper Japurá River drainage, Colombia.
Specimens of this species have been captured in localities near Mocoa, Department of Putumayo, draining in the Caquetá River, Atlantic slope, Eastern Andes Mountain Range. The north and south limits of the geographical boundary are unidentified.
Amazon, Middle Amazon (Solimoes), Japurá, Caquetá, Upper Caquetá (click on these areas to find other species found there)
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|Temperature||23.0-27.0°C or 73.4-80.6°F (Show species within this range)|
|Furniture||Well rounded stones stacked to replicate a river bottom and provide caves.|
|Breeding||Spawns in shallow, fast flowing water on the underneath of a flat object. Male, upside down, guards an adhesive clutch of eggs by, more or less, covering it with his body.|
|Breeding Reports||There is no breeding report.|
|Reference||Proceedings of the Academy of Natural Sciences of Philadelphia v. 95, pp 252, Figs. 36-39.|
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|Last Update||2019 Apr 06 22:31 (species record created: 2010 Sep 23 12:55)|