FISHERY BULLETIN: VOL. 73, NO. 3 



Comparative Diagnosis.-The monotypic genera 

 Cybiosarda and Orcynopsis share several 

 characters that distinguish them from Sarda and 

 Gymnosarda: low and poorly developed bony 

 caudal keels instead of well developed, but divided 

 into anterior and posterior parts; right lobe of liver 

 much longer than middle and left lobes instead of 

 both right and left lobes elongate; spleen small and 

 not visible in ventral view versus spleen large and 

 prominent in ventral view. Both have one inter- 

 muscular bone on the back of the skull compared to 

 none in Gymnosarda and two in Sarda. Both 

 genera have high first dorsal fins and are relatively 

 more compressed (almost like Scomberomorus) 

 than fusiform. Orcynapsis, Cybiosarda, and Gym- 

 nosarda have a pair of tooth patches on the tongue, 

 but these are attached to the glossohyal bone in 

 the first two genera and are on separate plates 

 that fit over the glossohyal in Gymnosarda. Os- 

 teologically, the two genera also show many 

 similarities. 



Cybiosarda differs from Orcynopsis most ob- 

 viously in its prominent pattern of blotches above 

 the lateral line and stripes below it (Figure la). 

 Cybiosarda has higher counts than does Orcynop- 

 sis: vertebrae 47-48 vs. 37-39; dorsal spines 16-18 

 vs. 12-14; second dorsal rays 17-19 vs. 12-15; pleural 

 ribs 19 vs. 16; and intermuscular bones 23-24 vs. 

 19-20. Cybiosarda has a smaller sagitta with a 

 longer and thinner rostrum than does Orcynopsis. 



Cybiosarda is a relatively short-bodied bonito 

 (Table 16). The snout-second dorsal distance is 

 shorter than in other bonitos except Orcynopsis 

 and Sarda chiliensis, the first dorsal fin base is 

 shorter than in the others except Orcynopsis and 

 Gymm)sarda. The second dorsal and anal fins are 

 higher than in Sarda and Allothunnus and the 

 second dorsal fin is also higher than in Gymnosar- 

 da. 



Cybiosarda elegans (Whitley) 



Scomberomorus (Cybiosarda) elegans Whitley 

 1935:236-237 (original description; Moreton 

 Bay, Queensland, Australia). 



Cybiosarda elegans. Whitley 1936:42-45 

 (redescription of type; anatomy; pi. 4, fig. 1; 

 text fig. 5; Queensland). Whitley 1939:274 

 (New South Wales). Serventy 1941a:43 

 (description, New South Wales and Western 

 Australia), pi. 4, bottom fig. Whitley 1948:24 

 Oisted; Western Australia). La Monte 1952:48, 

 50 (description). Munro 1958a:113-114 



Table 16.-Morphometric characters of Cybiosarda elegans. First 

 set of numbers are measurements expressed as thousandths of 

 fork length, second set as thousandths of head length. 



(description; Queensland, New South Wales, 

 Western Australia), fig. 756 (after Serventy). 

 Jones and Silas 1961:379 (compiled), fig. 5 

 (after Fraser-Brunner). CoUette and Gibbs 

 1963b:28 (description), pi. 7 (after Fraser- 

 Brunner). Jones and Silas 1963:1786-1787 

 (compiled). Jones and Silas 1964:24-25 

 (description). Marshall 1964:357-358 (sum- 

 mary), col. pi. 52, fig. 345. Whitley 

 1964a:228-229 (summary), pi. 2, fig. b (Western 

 Australia specimen), text fig. 4c (distribution). 

 Whitley 1964b:48 (listed). Marshall 1966:204, 

 col. pi. 52. Grant 1972:113 (description; 

 Queensland), fig. (after Serventy). 

 Gymnosarda elegans. Fraser-Brunner 1950:149 

 (description), fig. 15. 



Types.— Scomberomorus (Cybiosarda) elegans 

 Whitley 1935:236-237. Original description 

 repeated with additional locality data and the QM 

 catalog number for the type plus more informa- 

 tion on the species by Whitley (1936). Holotype: QM 



596 



