Fis/ies of the Western North Atlantic 



143 



Genus Dixonina Fowler 1 9 1 i 



Dixonina Fowler, Proc. Acad. nat. Sci. Philad. (igio), 191 1 : 651; type species by original designation, Dixo- 

 nina nemoptera Fowler. 



Characters. See species account below. 



Remarks. Dixonina is easily distinguished from Albula by the produced last ray of 

 both dorsal and anal fins. Furthermore, Dixonina has a somewhat longer and more 

 conical snout and a larger mouth than Albula. 



Range. A single species is known; this has been reported from the West Indies, 

 Venezuela, northern Brazil, and from the Pacific coast of Mexico and Central America. 



Dixonina nemoptera Fowler 1 9 1 1 



Shafted Bonefish^* 



Figure 24 



Study Material. One Pacific coast specimen, about 413 mm long, 334 mm SL, 

 from Acapulco, Mexico, USNM 75547, recorded by Myers. 



^m!y=^.7 A'i.A..'>^..> u,iv.Vi...'i..toA 



Figure 24. Dixonina nemoptera, 413 mm TL, Acapulco, Pacific coast of Mexico, USNM 75547. From 

 drawing by Ann S. Green. 



Description. Proportional dimensions in per cent of standard length, and counts, 

 based on Pacific specimen 334 mm SL. 



Anal fin: length of base ^.^. 

 Pectoral fin: length 15.6. 



Body: depth at origin of dorsal 23. 



Head: length 29.5. 



Snout: length 10.8. 



Eye: diameter 5.4. 



Maxillary: length from tip of snout 



Body slender, the back somewhat elevated, the ventral outline nearly straight; 

 depth at origin of dorsal 4.3 in SL. Scales firm, with crenulate membranous edges. 



18. Name suggested by George S. Myers. 



Scales: 76. 



Gill rakers: 5+10. 



Fin rays: dorsal 19; anal 8; pectoral 16. 



