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Beckerophotus
Taxonomy
Beckerophotus was named by Prokofiev (2001). Its type is Eomyctophum gracile.
It was assigned to Neoscopelidae by Prokofiev (2001); and to Neoscopelinae by Prokofiev (2006).
It was assigned to Neoscopelidae by Prokofiev (2001); and to Neoscopelinae by Prokofiev (2006).
Species
Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. M. Prokofiev 2001 | Small and elongate fishes, maxi mum body depth contained nearly 8 times in standard length (SL). Head large, its length contained nearly 3.1 times in SL. Mouth gape ends well posterior to the orbit. Jaws with rela tively large conical teeth; Maxillary with uni formly expanded posterior plate. Supramaxil lary present, well developed. Posterior expan sion ofcleithrum very broad. Pelvic bones very long, narrow, not fused medially, with well de veloped "ischiac" and "iliac" processes. Pelvic splint bone present, free. Dorsal fin originating on anterior halfofbody, pelvics situated under posterior third of dorsal fin. Pectoral fin tips not reaching origin of pelvic fins. Pectoral and pelvic fins similar in size. Distance between pectorals and pelvics slightly greater than that between pelvics and anal fin origin. Anal fin originating well posterior to end of dorsal fin, with 13 or more rays. Eight procurrent caudal fin rays in the upper lobe. There are six auto genous hypurals, parhypural, stegural and sec ond uroneural, two epurals and free second ural half-centrum (u2) in the caudal fin skeleton. Neural spine of second preural vertebra long. There are 32 vertebrae, of which 19 are caudal (including u2f Photophores not branched, ar ranged in two longitudinal lines on body below vertebral column. Tw9 posterior prepelvic pho tophores elevated. |