All FishesLoricariidaeRhinotocinclus

Hop to next section All Fishes Data Sheet
Scientific Name Rhinotocinclus polyochrus  Schaefer, 1988
Common Name
Type Locality Río Mawarinuma tributary at Neblina base camp, Territory Federal Amazonas, Venezuela, 0°55'N, 66°10'W, elevation 120 meters.
Synonym(s) Parotocinclus polyochrus
Hop to next section Species Information
Size 30mm or 1.2" SL. Find near, nearer or same sized spp.
Identification 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).
Sexing 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
Distribution South America: upper Negro River basin.
Amazon, Middle Amazon (Solimoes), Negro, Upper Negro (click on these areas to find other species found there)

Log in to view data on a map.
IUCN Red List Category Not Evaluated
Hop to next section Husbandry Information
Breeding Reports There is no breeding report.
Hop to next section Further Information
Reference Copeia 1988 (no. 1), pp 184, Figs. 1-2
Registered Keepers Keeping this species? Why not .
There is no registered keeper.
Wishlists Love this species? Click the heart to add it to your wish list.
There is no wish to keep this species.
Spotters Spotted this species somewhere? Click the binoculars!
There is no record of this fish being seen.
Forum BBCode
Look up Look up Rhinotocinclus polyochrus on
Look up on Fishbase Look up Rhinotocinclus polyochrus on Fishbase
Look up on Encyclopedia of Life Look up Rhinotocinclus polyochrus on Encyclopedia of Life
Look up on Global Biodiversity Information Facility Look up Rhinotocinclus polyochrus on Global Biodiversity Information Facility
 QR code LFS label creator.
Last Update 2022 Jul 10 10:50 (species record created: 2013 Aug 28 13:32)