Otothyropsis Piribebuy (Otothyropsis piribebuy), first described by Calegari, Lehmann A. & Reis, 2011 is a tiny fish. Adults typically reach 2.90 cm in maximum length. It inhabits freshwater systems including rivers, streams, and lakes. It occurs in Tropical waters. It is broadly omnivorous, taking invertebrates, plant matter, and detritus. On the IUCN Red List, it is classified as Least Concern.
Dorsal spines (total): 2; Dorsal soft rays (total): 7; Anal soft rays: 6; Vertebrae: 26 - 27. Distinguished from other species of the genus by having the following characters: middle series of lateral plates truncated two plates before the caudal fin; inner margin of the pectoral-fin spine smooth, with no serrae; distal margin of the accessory flange of the first ceratobranchial pointed; mid-dorsal lateral series with 17-18 plates and continuous; abdomen usually with unplated areas anteriorly in adults; and males with preanal length 63.0-66.8% HL and 19-20 middle lateral plates .: elongated.
Behavioural data for Otothyropsis Piribebuy is currently being reviewed.
Freshwater; demersal. Tropical South America: Río Piribebuy and río Aguaray, rio Paraguay basin in Paraguay.
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