1. Body completely covered by plates .......................... Loricariidae (2)

2'. Tall body, moderate or high caudal peduncle ................................. 5

5 ’. Scapular waist covered by plates ventrally; medium or large adult size .......................................................................................................... 6

6 ’. Less than 10 rays in the dorsal fin ................................................. 7

7 ’. Presence of eversible hypertrophied odontodes in the preopercus ...................................................................................................................9

9 ’. Adipose fin present, abdomen without plaques, short supracleitral pterotic .................................................................................................. 10

10 ’. Muzzle with plates; absence of fleshy tentacles on muzzle ..... 11

11 ’ Dental and pre-jaw teeth of different sizes .................................. 28

28 ’ Dental teeth smaller than those of the premaxilla ...................... 34

Pseudacanthicus sp. "L097" - Acari Açacu

Kingdom = Animalia; Phylum = Chordata; Class = Actinopterygii; Order = Siluriformes (Catfish); Family = Loricariidae; Genus = Pseudacanthicus sp.

Distribution: South America: Tapajós River and its tributaries in Brazil.

Size - Maximum Length: 18,0 cm.

Synonyms:  Pseudacanthicus sp. L097.

Common name of Pseudacanthicus sp. "L097": L097, Açacu (Brasil), Polka Dot Cactus Pleco (EUA).

Reference: Fisch-Muller, S., 2003. Loricariidae-Ancistrinae (Armored catfishes). p. 373-400. In R.E. Reis, S.O. Kullander and C.J. Ferraris, Jr. (eds.) Checklist of the Freshwater Fishes of South and Central America. Porto Alegre: EDIPUCRS, Brasil.