Cat-eLog Right Arrow Loricariidae Right Arrow Hypostominae Right Arrow Lasiancistrus

Jump to next section Cat-eLog Data Sheet
Scientific Name Lasiancistrus heteracanthus  (Günther, 1869)
Common Name
Type Locality Upper Amazon R., Peru.
Synonym(s) Chaetostomus heteracanthus
Pronunciation LASS ee an SISS truss
Etymology Greek, lasios, -a, -on = hairy + Greek, agkistron = hook 
Jump to next section Species Information
Size 153mm or 6" SL. Find near, nearer or same sized spp.
Identification Adult Lasiancistrus can be separated from all other loricariids by the presence of whisker-like odontodes on the cheeks. In addition, they have evertible cheek odontodes; three rows of plates on the caudal peduncle; and a modified, bar-shaped opercle. The caudal fin is slightly emarginate to forked, with the lower lobe longer than upper. Nuptial males have tentacules on the pectoral-fin spines longer than their associated odontodes; and transluscent tentacules on the snout that have odontodes associated with them. Nuptial males lack hypertrophied odontodes on top of the head and lack long, bristle-like odontodes on the leading edge of the pectoral-fin spine.
Sexing Snout of nuptial males almost square (vs. rounded in females and juveniles). Adult males of most species (except Lasiancistrus tentaculatus) with whisker-like odontodes at anterolateral corner of snout; males of L. tentaculatus have tentacules instead of whisker-like odontodes along anterior margin of snout. Nuptial males have tentacules longer than their associated odontodes on the pectoral-fin spine.
Jump to next section Habitat Information
Distribution South America: Marañon River basin.
Amazon, Upper Amazon, Marañón (click on these areas to find other species found there)

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Breeding Unreported.
Breeding Reports There is no breeding report.
Jump to next section Further Information
References Proc. Zool. Soc. Lond.1869 (pt 2) - pp425 - Figs. 3-4
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Last Update 2006 Jul 28 08:53 (species record created: 2006 Dec 25 13:32)