All FishesLORICARIIDAEHypostominaeLasiancistrus  |  | 

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Scientific NameLasiancistrus sp. (L479)     
Common NamesL479, Orangetailed Halffin Pleco
Orangehalet Halvfinnesugemalle (Denmark)
Synonym(s)
PronunciationLASS ee an SISS truss
EtymologyGreek, lasios, -a, -on = hairy + Greek, agkistron = hook Lorica, Loricare = cuirass of corslet of leather (a suit of armour made of leather).
Hop to next section Species Information
IdentificationAdult 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.

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.
SexingSnout 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.

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.
General RemarksSee also Armbruster, J.W. (2005). Neotrop. ichthyol., 3(4):549-569.

See also Armbruster, J.W. (2005). Neotrop. ichthyol., 3(4):549-569.
Hop to next section Habitat Information
DistributionSouth America
Amazon, Middle Amazon (Solimoes), Madeira, Aripuanã, Juma (click on these areas to find other species found there)

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Hop to next section Husbandry Information
Breeding ReportsThere is no breeding report.
Hop to next section Further Information
ReferenceDATZ 11/2015.
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Last UpdateSat Dec 25, 2010 10:17 am (Species record created: Thu Jan 01, 1970 1:00 am)