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Down arrow Cat-eLog Data Sheet
Scientific Name Otothyropsis polyodon  Calegari, Lehmann A. & Reis, 2013
Common Name
Type Locality Água Clara, ribeirão Tamanduá, tributary to rio Verde, near São Domingos Hydroeletric Plant, upper rio Paraná basin, 20°04’03"N, 53°11’21"W, Mato Grosso dul Sul, Brazil.
Etymology Otothyropsis: The first part of the name is from Greek (otos = ear and thyris = window) and is in reference to the Hypoptopomatinae genus Otothyris, to which the new taxon is closely related. The second part is from the Greek (opsis = relating to sight and appearance); hence, resembling a hypoptopomatine fish. The species polyodon from the Greek polys, meaning many, and odon, meaning tooth, in allusion to its higher number of teeth compared to the other species.
Down arrow Species Information
Size 37mm or 1.5" SL. Find near, nearer or same sized spp.
Identification Otothyropsis polyodon differs from all congeners by having a greater number of premaxillary teeth (19–31 vs. 10–20), greater number of dentary teeth (18–27 vs. 11–19), lower caudal peduncle 6.2–7.6% (vs. 7.6–11.5% SL), dorsal-fin spinelet rectangular in shape (vs. triangular or quadrangular), suture in the posteromesial portion of the paired basipterygium long—same size of the basipterygium medial cartilage (vs. suture smaller—one to two third of the basipterygium medial cartilage).
Sexing Male hypoptopomins posses a urogenital papilla located immediately posterior to the anus. It is absent in females.
Down arrow Habitat Information
Distribution Found in tributaries to the rio Verde a tributary to the upper rio Paraná basin in Mato Grosso do Sul, Brazil.
La Plata, Paraná, Upper Paraná, Verde (click on these areas to find other species found there)

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IUCN Red List Category Not Evaluated
Down arrow Husbandry Information
Breeding Unreported in the aquarium.
Breeding Reports There is no breeding report.
Down arrow Further Information
Reference Zootaxa 3619 (no. 2), pp 133, Figs. 3A-B, 4.
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Last Update 2021 Feb 21 02:50 (species record created: 2013 Feb 27 01:25)