Amblystilbe Fowler, 1940

Bertaco, Vinicius A., Chuctaya, Junior, Jerep, Fernando C. & Malabarba, Luiz R., 2023, Revision of Prodontocharax and revalidation of Amblystilbe (Teleostei: Characidae: Cheirodontinae), with description of a new species, Neotropical Ichthyology (e 230031) 21 (3), pp. 1-32 : 20

Amblystilbe Fowler, 1940

Amblystilbe Fowler, 1940:85 (type-species: Amblystilbe howesi Fowler, 1940 by original designation; gender feminine). —Géry, 1977:590 (synonym of Prodontocharax Eigenmann & Pearson, 1924 ). —Böhlke, 1984:48 (synonym of Prodontocharax Eigenmann & Pearson, 1924 ). —Malabarba, 2003:218 (synonym of Prodontocharax Eigenmann & Pearson, 1924 ).

Diagnosis. The inferior mouth, with mouth slit located at horizontal through inferior margin of eye, diagnoses Amblystilbe from other cheirodontine genera (except Prodontocharax ). The premaxilla with 8 to 10 teeth (vs. 4 to 6); the central cusp is larger than lateral ones vs. similarly sized cusp on all teeth; the posterior edentulous lamina of the maxilla flat and plane (vs. posterior edentulous lamina of the maxilla medially curved in relation to the anterior toothed portion); the anteriormost portion of dentary at the symphyseal joint very narrow in lateral view, at least seven times narrower than the height of the middle length portion of dentary (vs. the anteriormost portion of dentary at the symphyseal joint corresponding to nearly three times the height of the middle length portion of dentary); the dentary teeth nearly equal in size, shape and cusp number, forming a continuous series along the dentary (vs. dentary teeth decreasing in size and tooth cusp number posteriorly, forming an anterior series of large and tricuspidate teeth followed by a second and not aligned series of small conical teeth); the longer anal fin with 19 to 25 branched rays (vs. short anal fin with 11 to 15 branched rays) diagnoses Amblystilbe from Prodontocharax .