All FishesLORICARIIDAERhinotocinclus  |  | 

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Scientific NameRhinotocinclus britskii    (Boeseman, 1974)
Common NameDwarf Pleco
Type LocalityLeft tributary of Coppename River, Suriname, 3°51'N, 56°55'W.
Synonym(s)Parotocinclus amazonensis, Parotocinclus aripuanensis, Parotocinclus britskii
EtymologyRhinotocinclus is a combination of the Greek Rhinos meaning beak or snout and Otocinclus, a genus of Hypoptopomatinae, in allusion to the conspicuous and elegant snout of most of its species. Lorica, Loricare = cuirass of corslet of leather (a suit of armour made of leather).
Hop to next section Species Information
Size60mm or 2.4" SL. Find near, nearer or same sized spp.
IdentificationRhinotocinclus is diagnosed from all other genera in Hypoptopomatinae by having the canal cheek plate on the ventral surface of the head posteriorly elongated and contacting the cleithrum (vs. canal cheek plate rounded or mesially elongated and not expanded backwards to contact the pectoral girdle).

Rhinotocinclus is diagnosed from all other genera in Hypoptopomatinae by having the canal cheek plate on the ventral surface of the head posteriorly elongated and contacting the cleithrum (vs. canal cheek plate rounded or mesially elongated and not expanded backwards to contact the pectoral girdle).
SexingMales possess a urogenital papilla immediately behind the anus, and a variably deep skin fold along the first, unbranched pelvic-fin ray (vs. both absent in females). Also, males possess a much larger nostril than females, causing the internarial distance to be smaller in males. The larger size of the olfactory organ of males also causes an elevation in the snout profile immediately in front of the eyes, which can be easily seen in lateral view. In most species, males also possess longer pelvic fins than females, with the males' pelvic fins reaching or almost reach to the anal-fin origin.

Males possess a urogenital papilla immediately behind the anus, and a variably deep skin fold along the first, unbranched pelvic-fin ray (vs. both absent in females). Also, males possess a much larger nostril than females, causing the internarial distance to be smaller in males. The larger size of the olfactory organ of males also causes an elevation in the snout profile immediately in front of the eyes, which can be easily seen in lateral view. In most species, males also possess longer pelvic fins than females, with the males' pelvic fins reaching or almost reach to the anal-fin origin.
Hop to next section Habitat Information
DistributionSouth America
Guyana Waters, Coastal Rivers of Guyanas (click on these areas to find other species found there)
Guyana Waters, Coastal Rivers of Guyanas, Suriname Coastal Rivers (click on these areas to find other species found there)
Orinoco (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes) (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes), Madeira, Aripuanã (click on these areas to find other species found there)

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IUCN Red List Category
Not Evaluated
Temperature22.0-27.0°C or 71.6-80.6°F (Show species within this range)
Hop to next section Husbandry Information
Breeding ReportsThere is no breeding report.
Hop to next section Further Information
ReferenceProceedings of the Koninklijke Nederlandse Akademie van Wetenschappen (Series C, Biological and Medical Sciences) v. 77 (no. 3), pp267, Fig. 2; Pl. 2.
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Last UpdateSat Dec 25, 2010 10:17 am (Species record created: Thu Jan 01, 1970 1:00 am)