Editors' note: The term "high oceanic" is used here to
denote fishes that normally occur in ocean waters beyond
the continental shelf. "Epibenthic" ( = benthopelagic) fishes
are found near or just above the bottom. The "Antarctic
Polar Front" ( = Antarctic Convergence) is the region of the
Ant
Suo Ce
I
86: MYCTOPHIDAE (LANTERNFISHES)
southern ocean at about 50
0
S where the surface temperature
of the sea drops sharply to 2 °C as one proceeds southwards,
"Subantarctic" waters is the region of the ocean between
the Subtropical Convergence and the Antarctic Polar Front.
See glossary for additional definitions,
Supracaudal
I
PLO
\1\-0
1 1 )
Pol
SAO
! "r::s~
-1---------1----------H -1-------------1-------------- ~ +i~
On __ •• ___ • _
Vn. _____ _
Distribution of luminous organs and their abbreviated terminology.
KEY TO GENERA
la Minute "secondary" photophores on head and
body, under each scale pocket and on fin
membranes; "primary" photophores indistinct .......... Scopelopsis
Ib "Secondary" photophores absent, or if present clearly
distinct from "primary" photophores ............................. ,..... 2
2a VLO, SA03 and Pol close to dorsal contour of
body; 2 Prc, with PrCz well above horizontal septum .. .. Notolychnus
VLO
SAO.
Pol
Pre.,
---;r---i:=--~,----=-j~
~
2b VLO, SA03 and Pol below or slightly above LL, well
below dorsal contour of body; 2 or more Prc, with PrCz
never above horizontal septum or LL ................................... 3
3a Two Prc ................................................................. .. ..... 4
3b More than 2 Prc ............................................................. 15
4a PLO from less than its diameter above to well below level
of upper end of P base ...................................................... 5
PLO
-$ ~
PLo .. ~lp
lit= , "
j
\
pJo,fiV02
pJot V02
I h
: ::
~
: : i
,
, i
Iii
2 J ~ 5 6
AOa
1 : I
: i 2
! PVC
Infraca~dal
4b PLO more than its diameter above level of upper end
ofPbase ...................................................................... 11
PLO
i
-.-W;i---- -~
~ 0 \0 u
\ PV02
PVO ,
5a Mouth subterminal; snout conical and more or less
protruding; PLO at or slightly above level of upper end
of P base; AO series divided into AOa and AOp; C
peduncle markedly slender, its least depth 2.5 or more
times in its length ............................................................ 6
5b Mouth terminal; snout not protruding; PLO well below
level of upper end of P base; AO series continuous; C
peduncle not markedly slender, its least depth less than
2.5 times in its length ........................................................ 8
6a GR absent - reduced to spiny knobs ................. Centrobranchus
6b GR present .................................................................... 7
7a A origin under middle of D base; none or only
one AOp above A; least depth of C peduncle
about 2.5 times in its length ...................................... Loweina
7b A origin on or slightly in advance of vertical
through base of last Dray; 5-7 AOp over A base;
least depth of C peduncle 3.5 or more in its length
Gonichthys
283
denote fishes that normally occur in ocean waters beyond
the continental shelf. "Epibenthic" ( = benthopelagic) fishes
are found near or just above the bottom. The "Antarctic
Polar Front" ( = Antarctic Convergence) is the region of the
Ant
Suo Ce
I
86: MYCTOPHIDAE (LANTERNFISHES)
southern ocean at about 50
0
S where the surface temperature
of the sea drops sharply to 2 °C as one proceeds southwards,
"Subantarctic" waters is the region of the ocean between
the Subtropical Convergence and the Antarctic Polar Front.
See glossary for additional definitions,
Supracaudal
I
PLO
\1\-0
1 1 )
Pol
SAO
! "r::s~
-1---------1----------H -1-------------1-------------- ~ +i~
On __ •• ___ • _
Vn. _____ _
Distribution of luminous organs and their abbreviated terminology.
KEY TO GENERA
la Minute "secondary" photophores on head and
body, under each scale pocket and on fin
membranes; "primary" photophores indistinct .......... Scopelopsis
Ib "Secondary" photophores absent, or if present clearly
distinct from "primary" photophores ............................. ,..... 2
2a VLO, SA03 and Pol close to dorsal contour of
body; 2 Prc, with PrCz well above horizontal septum .. .. Notolychnus
VLO
SAO.
Pol
Pre.,
---;r---i:=--~,----=-j~
~
2b VLO, SA03 and Pol below or slightly above LL, well
below dorsal contour of body; 2 or more Prc, with PrCz
never above horizontal septum or LL ................................... 3
3a Two Prc ................................................................. .. ..... 4
3b More than 2 Prc ............................................................. 15
4a PLO from less than its diameter above to well below level
of upper end of P base ...................................................... 5
PLO
-$ ~
PLo .. ~lp
lit= , "
j
\
pJo,fiV02
pJot V02
I h
: ::
~
: : i
,
, i
Iii
2 J ~ 5 6
AOa
1 : I
: i 2
! PVC
Infraca~dal
4b PLO more than its diameter above level of upper end
ofPbase ...................................................................... 11
PLO
i
-.-W;i---- -~
~ 0 \0 u
\ PV02
PVO ,
5a Mouth subterminal; snout conical and more or less
protruding; PLO at or slightly above level of upper end
of P base; AO series divided into AOa and AOp; C
peduncle markedly slender, its least depth 2.5 or more
times in its length ............................................................ 6
5b Mouth terminal; snout not protruding; PLO well below
level of upper end of P base; AO series continuous; C
peduncle not markedly slender, its least depth less than
2.5 times in its length ........................................................ 8
6a GR absent - reduced to spiny knobs ................. Centrobranchus
6b GR present .................................................................... 7
7a A origin under middle of D base; none or only
one AOp above A; least depth of C peduncle
about 2.5 times in its length ...................................... Loweina
7b A origin on or slightly in advance of vertical
through base of last Dray; 5-7 AOp over A base;
least depth of C peduncle 3.5 or more in its length
Gonichthys
283