Attains 29 mm. High-oceanic, mesopelagic; 400 -1250 m
(day); 10 - 1 050 m (night); light-coloured individuals nonmigratory. Atlantic (50 0 N-48°S), Indian Ocean (22°-45°S)
and Pacific (35°N- 35°S, but absent in equatorial waters west
of 130 o W, and near Hawaii).
86.43 Diogenichthys panurgus
Bolin, 1946
Diogenichthys panurgus Bolin, 1946: 140 (05°S6'N, 76"22'W); Nafpaktitis & Nafpaktitis, 1969: 14"; Kotthaus, 1972: 15*; Hulley, 1984: 7S*.
D 10-12; A 15-17; P 10-11; GR 2+(9-10); AO (5-7)+(2-3). Mature
males with single, large, supracaudalluminous gland, extending from procurrent C rays almost to base of adipose fin; mature females with 1-2
coalesced luminous patches infracaudally.
Attains 23 mm. High-oceanic, mesopelagic. In Agulhas
Current to about 38°S and in Indian Ocean (19°N-05°S).
/ ' ...... \\ ~
86.43 Diogenichthys panurgus: 2 em SL.
Genus Electrona Goode & Bean, 1896
Maxilla greatly expanded posteriorly, extending to or
slightly beyond rear margin of orbit; A base longer than D
base. Dn and Vn present; 5 PO; 4 VO; Pol absent, but AO
series behind end of base of A may be depressed. Five
species; probably all in our area.
KEY TO SPECIES
la AO 10·12; body depth greater than or equal to
73 SL; SAO series slightly curved ........ ........... ............... E. risso
Ib AO 13-19; body depth less than 73 SL; SAO series angulate ........ 2
2a So on or slightly behind vertical through middle
of orbit; SA03 nearer to SA02 than to LL ................ E. carlsbergi
2b So absent; SA03 nearer LL than to SA02 .... ...... ........... ...... .... 3
3a Total GR 16-20; PLO nearer to PVO! than to
PV02; AO series level ......................................... E. antarctica
3b Total GR 21-31; PLO equidistant from PVO! and
PV02; AO series with last 4-5 photophores depressed ............... 4
4a GR 27-31; Prc],Prez interspace less than 1
photophore-diameter; POs not elevated, level
with outer base of V; VLO usually nearer V
base than to LL ................................................. E. subaspera
4b GR 21-24; Prc],Prc2 interspace equal to or
greater than 1 photophore-diameter; POs
elevated, above level of outer base of V;
VLO usually about midway between V base
and LL ......................... .... .............................. E. paucirastra
86: MYCfOPHIDAE (LANTERNFISHES)
86.44 Electrona antarctica
(Gunther, 1878)
Scopelus antarcticus Giinther, 1878: 184 (Antarctic Ocean); 1887: 196'.
Myctophum antarcticum: Norman, 1930: 322" (in part); Smith, SFSANo.
193. Electrona antarctica: Hulley, 1972: 219; 1981: 37*.
D 14-16; A 19-22; P 11-13; GR (3-5)+(12-16); AO 17-19. Mature males
with 5-7 separate, supracaudalluminous glands; mature females with 4-6
separate, infracaudalluminous glands.
Attains 103 mm. High-oceanic, mesopelagic; upper 100
m south of Antarctic Polar Front, but deeper northwards.
Off the Cape and at 43°17'S, 48°55'E. Circumpolar distribution south of Antarctic Polar Front, where it is one of the
commonest myctophid species.
~
. C .. ···> .;........................ <
~
\ """"::::''''''''
....
•
~
' 0 --. '. : . ' ......... .... ...
• /
86.44 Eiectrona antarctica: 6 em SL.
86.45 Electrona carlsbergi
(Taning, 1932)
Myctophum carlsbergi Taning, 1932: 126, Fig. 1 (44°40'S, 173°39'E).
Electrona carlsbergi: Hulley, 1981: 40*.
D 13-1S; A 18·20; P 12·13; GR (8·10)+(19·25); AO 13·1S. Both sexes
with single, small, supracaudal and single, small, infracaudal luminous
gland.
Attains 95 mm. High-oceanic, mesopelagic; upper 100 m
south of 50 o S, but below 550 m in region of Subtropical Convergence. Not yet recorded in our area. Circumglobal in
subantarctic waters (400-60 0 S).
86.45 Eiectrona carlsbergi: 7.5 em SL.
86.46 Electrona paucirastra
Bolin, 1962
Electrona paucirastra Bolin, in Andriashev, 1962: 280 (39"30'S,
71°16'E); Nafpaktitis& Nafpaktitis, 1969: 9"; Hulley, 1981: 43*.
297
(day); 10 - 1 050 m (night); light-coloured individuals nonmigratory. Atlantic (50 0 N-48°S), Indian Ocean (22°-45°S)
and Pacific (35°N- 35°S, but absent in equatorial waters west
of 130 o W, and near Hawaii).
86.43 Diogenichthys panurgus
Bolin, 1946
Diogenichthys panurgus Bolin, 1946: 140 (05°S6'N, 76"22'W); Nafpaktitis & Nafpaktitis, 1969: 14"; Kotthaus, 1972: 15*; Hulley, 1984: 7S*.
D 10-12; A 15-17; P 10-11; GR 2+(9-10); AO (5-7)+(2-3). Mature
males with single, large, supracaudalluminous gland, extending from procurrent C rays almost to base of adipose fin; mature females with 1-2
coalesced luminous patches infracaudally.
Attains 23 mm. High-oceanic, mesopelagic. In Agulhas
Current to about 38°S and in Indian Ocean (19°N-05°S).
/ ' ...... \\ ~
86.43 Diogenichthys panurgus: 2 em SL.
Genus Electrona Goode & Bean, 1896
Maxilla greatly expanded posteriorly, extending to or
slightly beyond rear margin of orbit; A base longer than D
base. Dn and Vn present; 5 PO; 4 VO; Pol absent, but AO
series behind end of base of A may be depressed. Five
species; probably all in our area.
KEY TO SPECIES
la AO 10·12; body depth greater than or equal to
73 SL; SAO series slightly curved ........ ........... ............... E. risso
Ib AO 13-19; body depth less than 73 SL; SAO series angulate ........ 2
2a So on or slightly behind vertical through middle
of orbit; SA03 nearer to SA02 than to LL ................ E. carlsbergi
2b So absent; SA03 nearer LL than to SA02 .... ...... ........... ...... .... 3
3a Total GR 16-20; PLO nearer to PVO! than to
PV02; AO series level ......................................... E. antarctica
3b Total GR 21-31; PLO equidistant from PVO! and
PV02; AO series with last 4-5 photophores depressed ............... 4
4a GR 27-31; Prc],Prez interspace less than 1
photophore-diameter; POs not elevated, level
with outer base of V; VLO usually nearer V
base than to LL ................................................. E. subaspera
4b GR 21-24; Prc],Prc2 interspace equal to or
greater than 1 photophore-diameter; POs
elevated, above level of outer base of V;
VLO usually about midway between V base
and LL ......................... .... .............................. E. paucirastra
86: MYCfOPHIDAE (LANTERNFISHES)
86.44 Electrona antarctica
(Gunther, 1878)
Scopelus antarcticus Giinther, 1878: 184 (Antarctic Ocean); 1887: 196'.
Myctophum antarcticum: Norman, 1930: 322" (in part); Smith, SFSANo.
193. Electrona antarctica: Hulley, 1972: 219; 1981: 37*.
D 14-16; A 19-22; P 11-13; GR (3-5)+(12-16); AO 17-19. Mature males
with 5-7 separate, supracaudalluminous glands; mature females with 4-6
separate, infracaudalluminous glands.
Attains 103 mm. High-oceanic, mesopelagic; upper 100
m south of Antarctic Polar Front, but deeper northwards.
Off the Cape and at 43°17'S, 48°55'E. Circumpolar distribution south of Antarctic Polar Front, where it is one of the
commonest myctophid species.
~
. C .. ···> .;........................ <
~
\ """"::::''''''''
....
•
~
' 0 --. '. : . ' ......... .... ...
• /
86.44 Eiectrona antarctica: 6 em SL.
86.45 Electrona carlsbergi
(Taning, 1932)
Myctophum carlsbergi Taning, 1932: 126, Fig. 1 (44°40'S, 173°39'E).
Electrona carlsbergi: Hulley, 1981: 40*.
D 13-1S; A 18·20; P 12·13; GR (8·10)+(19·25); AO 13·1S. Both sexes
with single, small, supracaudal and single, small, infracaudal luminous
gland.
Attains 95 mm. High-oceanic, mesopelagic; upper 100 m
south of 50 o S, but below 550 m in region of Subtropical Convergence. Not yet recorded in our area. Circumglobal in
subantarctic waters (400-60 0 S).
86.45 Eiectrona carlsbergi: 7.5 em SL.
86.46 Electrona paucirastra
Bolin, 1962
Electrona paucirastra Bolin, in Andriashev, 1962: 280 (39"30'S,
71°16'E); Nafpaktitis& Nafpaktitis, 1969: 9"; Hulley, 1981: 43*.
297