Mexican snook

diagnosis

Diagnosis. Centropomus poeyi differs from its congeners as follows: Western Atlantic: from C. undecimalis, by having 69 – 74 scales on lateral line to caudal-fin base (vs 66 – 75), 9 – 12 lower limb gill rakers on the first arc (vs 8 – 11), 15 – 18 gill rakers on first arch (vs 11 – 14), and second dorsal fin with I, 9 (vs I, 11); from C. irae, by having 69 – 74 scales on lateral line to caudal-fin base (vs 79 – 96), 9 – 12 lower limb gill rakers on the first arc (vs 7 – 8), 15 – 18 gill rakers on first arch (vs 11 – 13), and second dorsal fin with I, 9 (vs I, 11); from C. parallelus, by having 69 – 74 scales on lateral line to caudal-fin base (vs 64 – 70), 9 – 12 lower limb gill rakers on the first arc (vs 10 – 13), pelvic fin not reaching the anus (vs pelvic fin usually reaching the anus), and second dorsal fin with I, 9 (vs I, 11); from C. ensiferus, by having 69 – 74 scales on lateral line to caudal-fin base (vs 48 – 58), 9 – 12 lower limb gill rakers on the first arc (vs 10 – 15), and second dorsal fin with I, 9 (vs I, 11); from C. pectinatus, by having 69 – 74 scales on lateral line to caudal-fin base (vs 47 – 52), 9 – 12 lower limb gill rakers on first arc (vs 14 – 16), 15 –

Taxonomy of Centropomus Lacépède, 1802 (Perciformes: Centropomidae), with focus on the Atlantic species of the genus

discussion

Remarks. No specimens of Centropomus poeyi were directly examined in the present study. Diagnosis and distribution were based on Chávez (1961) and Rivas (1986). ...... continued on the next page Total length (TL); Standard length (SL); Body height (BH); Caudal peduncle height (CPH); Caudal peduncle length (CPL); Caudal peduncle width (CPW); Body width (BW); Distance from snout to pectoral fin (SPecF); Distance from snout to pelvic fin (SPelF); Distance from snout to dorsal fin (SDF 1); Distance from snout to anal fin (SAF); Head length (HL); Head height (HH); Distance from snout to anterior orbit (SAO); Orbital diameter (OD); Orbital height (OH); Distance from orbit to gill membrane (OGM); First dorsal-fin base length (D 1 BL); Second dorsal-fin base length (D 2 BL); Total dorsal-fin base length (TDBL); Longest spine of first dorsal fin length (SDL); Pelvic fin length (PelL); Longest spine of pelvic fin length (SPL); Anal-fin base length (ABL); Longest spine of anal fin length (SBL); Pectoral fin length (PecL); Mouth width (MW); Upper jaw length (UJL); Lower jaw length (LJL); Distance from maxillary to center of mouth (MCM); Protractile membrane base height (PBH); Interorbital dist

Taxonomy of Centropomus Lacépède, 1802 (Perciformes: Centropomidae), with focus on the Atlantic species of the genus

distribution

Distribution. Centropomus poeyi occurs along the coast of Mexico, from Tampico (Tamaulipas) to Frontera (Tabasco). Centropomus poeyi and C. irae have the most restricted distributions when compared to Western Atlantic congeners.

Taxonomy of Centropomus Lacépède, 1802 (Perciformes: Centropomidae), with focus on the Atlantic species of the genus

materials_examined

Type. USNM 196622, 233 mm SL (Fig. 16), loc.: Mexico. The holotype determined by Chávez (1961) is a 230 mm SL specimen deposited in Estación de Biologia Marina, Instituto Tecnologico de Veracruz, Mexico (EBMTV 235). However, the type specimen and 15 of 27 paratypes were lost (Rivas 1986). The neotype (USNM 196622) designated by Rivas (1986) is a 233 mm SL specimen from Mexico, deposited in the Muséum national d’Histoire naturelle.

Taxonomy of Centropomus Lacépède, 1802 (Perciformes: Centropomidae), with focus on the Atlantic species of the genus