Evolution In The Oceanic Midwaters: Comparative Osteology And Relationships Of The Lanternfishes (Family Myctophidae). - Page 189 |
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181
procurrent caudal rays weakly fused at tips . . . .
| (TRIBE GONICHTHYINI) !5
3A- PLO ventral to pectoral base; AOa and AOp con- i
i tinuous or last one or two AOa elevated as Pol
I photophores . . . . 4
i |3B. PLO dorsal to pectoral base; I AOa and AOp dis-i
continuous, one or two distinct P o l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 i
i||4A. PVO angled, in a line with PO-^; maxillary shelf
present; urohyal wing anterior to or at anterior ii
j! margin of second hypobranchial ............ Electrona I j j ;UB. PVO horizontal, a line between them markedly
above PO-^; no maxillary shelf; urohyal wing
i posterior to anterior margin of second hypobranchial
....................... Protomyctophum . . 5
5A. Supracaudal glands never large, single, and
bordered by heavy black pigment; frontals not
reduced, wider than posterior portion of maxillary;
eyes n o r m a l ........... sub'genus Protomyctophum
|’5B. Supracaudal glands of males large, single, I
! bordered by heavy black pigment; frontals between
orbits slightly or considerably reduced,
} as wide as or narrower than posterior portion
‘ of maxillary; eyes usually semi-telescopic . . . .
i
......................................... subgenus Hierops
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| Title | Evolution In The Oceanic Midwaters: Comparative Osteology And Relationships Of The Lanternfishes (Family Myctophidae). - Page 189 |
| Repository email | cisadmin@lib.usc.edu |
| Full text | 181 procurrent caudal rays weakly fused at tips . . . . | (TRIBE GONICHTHYINI) !5 3A- PLO ventral to pectoral base; AOa and AOp con- i i tinuous or last one or two AOa elevated as Pol I photophores . . . . 4 i |3B. PLO dorsal to pectoral base; I AOa and AOp dis-i continuous, one or two distinct P o l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 i i||4A. PVO angled, in a line with PO-^; maxillary shelf present; urohyal wing anterior to or at anterior ii j! margin of second hypobranchial ............ Electrona I j j ;UB. PVO horizontal, a line between them markedly above PO-^; no maxillary shelf; urohyal wing i posterior to anterior margin of second hypobranchial ....................... Protomyctophum . . 5 5A. Supracaudal glands never large, single, and bordered by heavy black pigment; frontals not reduced, wider than posterior portion of maxillary; eyes n o r m a l ........... sub'genus Protomyctophum |’5B. Supracaudal glands of males large, single, I ! bordered by heavy black pigment; frontals between orbits slightly or considerably reduced, } as wide as or narrower than posterior portion ‘ of maxillary; eyes usually semi-telescopic . . . . i ......................................... subgenus Hierops |
