Cat-eLog Right Loricariidae Right Rhinotocinclus  |  | 

Down Cat-eLog Data Sheet
Scientific Name Rhinotocinclus acuen  (Silva, Roxo & Oliveira, 2014)
Common Name
Type Locality Mato Grosso State, Municipality of Querência, rio Xingu basin, 13°00'26"S, 52°11'27"W, Brazil.
Synonym(s) Hisonotus acuen
Etymology Rhinotocinclus 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. The specific name acuen is in reference to the Xavante indigenous peoples, who in anthropological literature are known as 'acuen'. These people are constituted by the natives inhabiting the east of the Mato Grosso State, living in the margins of the rivers Culuene, Xingu, Mortes and Araguaia.
Down Species Information
Size 29mm or 1.1" 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.
Down Habitat Information
Distribution South America: upper rio Xingu basin in Mato Grosso State, Brazil.
Amazon, Lower Amazon, Xingu, Upper Xingu (click on these areas to find other species found there). Maps are currently offline pending redevelopment (July/August 2024).
IUCN Red List Category
Not Evaluated
Down Husbandry Information
Breeding Reports There is no breeding report.
Down Further Information
Reference ZooKeys No. 442, pp 107, Figs. 1, 3-6.
Registered Keepers There is but a single registered keeper, view all "my cats" data.
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There are 2 records of this fish being seen, view them all.
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Last Update 2022 Nov 26 06:19 (species record created: 2016 Jul 26 14:36)