Cheirodon interruptus (Jenyns, 1842)

Soricetti, Mariano, Morawicki, Santiago, Guardiola Rivas, Fredy José, Guidi, Catalina, Quezada, Facundo, Almirón, Adriana Edith & Solimano, Patricio José, 2020, Ichthyofauna of the lower course of the Negro river drainage, Patagonia Argentina, Check List 16 (4), pp. 895-905 : 898-900

Cheirodon interruptus (Jenyns, 1842)

Figure 3C

Material examined. ARGENTINA • 1 ♂, 64 mm; Site 2; 40°42ʹ48ʺS, 063°23ʹ08ʺW; 15 Oct. 2016; F. Guar- diola Rivas leg.; MPCN-Ict 3 . • 1 ♀, 39 mm; Site 2; 40° 42ʹ48ʺS, 063°23ʹ08ʺW; 22 Nov. 2016; F. Guardiola Ri- vas leg.; MPCN-Ict 25 . • 1 ♀, 42 mm; Site 2; 40°42ʹ48ʺS, 063°23ʹ08ʺW; 22 Nov. 2016; F. Guardiola Rivas leg.; MPCN-Ict 26 . • 1 ♂, 45 mm; Site 2; 40°42ʹ48ʺS, 063° 23ʹ08ʺW; 13 Dec. 2016; M. Soricetti leg.; MPCN-Ict 27 . • 1 ♂, 51 mm; Site 4; 40°43ʹ15ʺS, 063°36ʹ02ʺW; 21 Aug. 2016; F. Quezada leg.; MPCN-Ict 28 . • 1 ♀, 54 mm; Site 4; 40°43ʹ15ʺS, 063°36ʹ02ʺW; 23 Aug. 2016; F. Guardiola Rivas leg.; MPCN-Ict 29 . • 1 ♂, 57 mm; Site 4; 40°43ʹ15ʺS, 063°36ʹ02ʺW; 20 Feb. 2017; M. Soricetti leg.; MPCN-Ict 30 .

Identification. Body compressed. Premaxilla with one row of five multicuspidated teeth. Maxilla with one tooth. Pseudotympanum present. Lateral line interrupted with 5–8 perforated scales. Twenty-two to 29 ventral procur- rent rays, more prominent in males. Pelvic fin with six branched rays. Caudal-fin rays, 14–17. Conspicuous sub- circular dark spot on caudal peduncle present.