FISHERY BULLETIN: VOL. 82, NO. 4 



429). Bohlke (1953:105) considered SU 1720 to be 

 the holotype of the species but there is a specimen 

 in the British Museum (BMNH 1895.5.24.104) 

 which is also labelled as "type". To clarify the 

 issue, we hereby select CAS SU 1720 as lectotype: 

 Mazatlan, Mexico; D. S. Jordan; 332 mm FL; D 

 XVIII + 17 + IX; A 19+ VIII; P x 22; RGR X 4+1 

 + 11 = 16; 3 rows of faint small spots visible on 

 both sides in 1962, size of spots about equal to 

 half diameter of eye. Paralectotype: BMNH 

 1895.5.24.104; Mazatlan, Mexico; D. S. Jordan; tin 

 tag with no. 1720 attached to specimen; 550 mm 

 FL; D XVII+17+IX; A 16 + IX; Pj 21-22; LGRi 

 3 + 1 + 10 = 14; 3 rows of spots on sides. 



Diagnosis. — This species possesses nasal denti- 

 cles (Fig. la, b) as do the other five species of the 

 regalis group (brasiliensis, concolor, maculatus, 

 regalis, and tritor), has an artery branching off 

 the fourth left epibranchial artery as do all the 

 species in the group except S. tritor, and shares a 

 specialization of the fourth right epibranchial 

 artery (Fig. 7e) with S. brasiliensis and S. regalis. 

 In these three species, an artery connects the 

 fourth right epibranchial with a branch of the 

 coeliaco-mesenteric artery. Scomberomorus sier- 



ra has a longer pelvic fin (Fig. 48) than does S. 

 brasiliensis (4.7-6.4% FL vs. 3.6-5.9%) and lacks 

 the lateral stripe that is the diagnostic feature of 

 the pigment pattern of S. regalis. Together with 

 three other members of the regalis group, S. sierra 

 has a long posterior process on the pelvic girdle, 

 62-90% of the length of the anterior plate. Dif- 

 fers from S. brasiliensis by having distinct pterot- 

 ic spines. Intercalar spine absent as in the other 

 five species of the regalis group and S. niphoni- 

 us. 



Description. — Lateral line gradually descending 

 to midline on caudal peduncle. Intestine with two 

 folds and three limbs (Fig. 3p). Spines in first 

 dorsal fin 15-18, usually 17 or 18 (Table 9); second 

 dorsal fin rays 16-19, usually 17 or 18 (Table 10); 

 dorsal finlets 7-10, usually 8 or 9 (Table 10); anal 

 fin rays 16-21, usually 18-20 (Table 11); anal finlets 

 7-10, usually 8 or 9 (Table 11); pectoral fin rays 20- 

 24, usually 21 (Table 12). Precaudal vertebrae 19- 

 21, usually 20 (Table 6); caudal vertebrae 26-29, 

 usually 28 (Table 7); total vertebrae 46-49, usu- 

 ally 48 (Table 8). Gill rakers on first arch (2-4) + 

 (9-14) = 12-17, usually 3 + (12-13)= 15-16 (Table 5). 

 Morphometric characters given in Table 28. 



TABLE 28. — Summary of morphometric data of Scomberomorus sierra. FL = fork length, HL = head length. 



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