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  • Chaetostoma marginatum
Down arrow Cat-eLog Data Sheet
Scientific Name Chaetostoma marginatum  Regan, 1904
Common Name
Type Locality Salidero, northwestern Ecuador [= Near Bulún [Pulún], about 1°05'N, 78°40'W, Rio Bogota, Esmeraldas, Ecuador, elevation 50-110 m].
Pronunciation KATE oh STOW mah
Etymology Greek, chaite = hair + Greek, stoma = mouth. 
Down arrow Species Information
Size 190mm or 7.5" 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.
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.
Down arrow Habitat Information
Distribution South America: Bogota, Chimbo and San Juan River basins.

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IUCN Red List Category Least Concern, range map and more is available on the IUCN species page. Last assessed 2014.
Down arrow Husbandry Information
Furniture Well rounded stones stacked to replicate a river bottom and provide caves.
Breeding Has been bred in the aquarium.
Breeding Reports There is no breeding report.
Down arrow Further Information
Reference Transactions of the Zoological Society of London v. 17 (pt 3, no. 1), pp 249, Pl. 13 (fig. 1).
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Last Update 2019 Sep 29 07:35 (species record created: 2007 May 06 14:53)