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Gymnotocinclus anosteos Carvalho, Lehmann A. & Reis, 2008 |
| Family: | Loricariidae (Armored catfishes), subfamily: Hypoptopomatinae | |||
| Max. size: | 4.43 cm SL (male/unsexed) | |||
| Environment: | benthopelagic; freshwater | |||
| Distribution: | South America: Brazil. Known only from two creeks, both tributaries to the rio Tocantinzinho, in the headwaters of the rio Tocantins basin, Goiás (Ref. 79020). | |||
| Diagnosis: | Gymnotocinclus is distinguished from all other hypoptopomatine genera by the following uniquely derived features: extreme reduction of body dermal plates; absence of the lateral connecting bone; absence of bifid hemal spines on the abdominal vertebrae posterior to the first anal-fin proximal radial; and odontode tips on last dermal plates on the caudal peduncle dorsally or anteriorly curved. Gymnotocinclus is also distinguished by a number of non-exclusive traits: maxillary barbel adnateto the lower lip; lateral ethmoid almost completely encapsulating the nasal organ; ventral margin of preopercle straight, not deflected medially; pectoral girdle exposed and supporting odontodes only in a restricted lateral area near base of pectoral fin; and absence of a pectoral-fin slit (Ref. 79020). | |||
| Biology: | ||||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 07 November 2018 Ref. (130435) | |||
| Threat to humans: | harmless | |||