COLLETTE and RUSSO: SPANISH MACKERELS 



a 



FIGURE 44. — Left first postcleithra in lateral 

 view. a. Scomberomorus sinensis. Hong Kong, 

 677 mm FL, 1 x . b. Scomberomorus koreanus, 

 Indonesia, 480 mm FL, 2 x . c. Acanthocyb- 

 ium solandn, Revillagigedos Is., 1,068 mm FL. 

 lx. d. Grammatorcynus bilineatus, Queens- 

 land, 521 mm FL, 2x . 



(Fig. 44c) than in the species of Scomberomorus 

 (24-41%). Three species of Scomberomorus have 

 wide first postcleithra (37-41%): commerson, si- 

 nensis (Fig. 44a), and tritor. Three species have 

 narrow first postcleithra: koreanus (24-26%, Fig. 

 44b), lineolatus (28-29%), and guttatus (28-31%). 

 The other 12 species have moderately wide first 

 postcleithra, 30-39%. Devaraj (1977:48) reported 

 long, narrow first postcleithra in the same three 

 species (plus S. maculatus and S. regalis from 

 Mago Leccia's 1958 work) and wider ones in S. 

 commerson and S. cavalla. 



The second postcleithrum (Fig. 45) is broad and 

 lamellar at the upper part with a short pointed 

 ascending process and a long styliform descend- 

 ing process. Grammatorcynus (Fig. 45d) differs 

 strikirfgly from Acanthocybium and Scombero- 

 morus in having a sharp process extending anteri- 

 orly from the broad lamellar portion of the bone. 

 Inclusion of this process in measurements of the 



width of the bone makes the second postcleithrum 

 appear much wider in Grammatorcynus, 37-42% 

 of total length compared with 16-27% in the other 

 two genera. The widest second postcleithra in 

 Scomberomorus, 22-27% of total length, are in 

 lineolatus, maculatus , plurilineatus , and queens- 

 landicus (Fig. 45a). The narrowest ones are in 

 guttatus and koreanus (15-20%, Fig. 45b), and 

 cavalla, sierra, and sinensis (19-20%). Acantho- 

 cybium (Fig. 45c) and the other nine species of 

 Scomberomorus are intermediate, 20-24%. The 

 ascending process appears longer in 6 species of 

 Scomberomorus (brasiliensis, cavalla, macula- 

 tus, queenslandicus , regalis, and tritor) than in 

 Acanthocybium , Grammatorcynus , and the other 

 12 species of Scomberomorus. 



PELVIC GIRDLE 



The pelvic fin rays (I, 5) attach directly to the 



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