86: MYCTOPHIDAE (LANTERNFISHES)
D 11-12; A 15-16; P 11-12; GR 3+(9-11); AO (5-8)+(5-7).
Attains 39 mm. High-oceanic, mesopelagic; 60 - 175 m
and 800 m (night). Rare species, taken once in our area at
35°Ol'S, 10
0
18'E; bitemperate in Atlantic and in southern
Indian and Pacific oceans.
86.95 Loweina rara
(Uitken, 1892)
Scopelus (Rhinoscopelus) rarus Liitken, 1892: 246 (in part; 200N, 48°_
50 0 W). Myctophum (Myctophum) rarum: Brauer, 1906: 204*. Loweina
rara: Bekker, 1964: 24 *; Pertseva-Ostroumova, 1974: 130*; Wisner, 1976:
78*; Nafpaktitis et al., 1977: 81*.
D 11-12; A 15-16; P 10-11; GR 2+(6-7); AO 6+(5-7).
Attains 45 mm. High-oceanic, mesopelagic; 550 m to
greater than 1 000 m (day); found in upper few metres (not
at surface) to 200 m (night). Not yet recorded from our
area. An uncommon species in Atlantic (46°N-26°S), Indian
(10 0 -22°S) and Pacific (central water masses) oceans.
86.95 Loweina rara: 4 em SL male (after Nafpaktitis et aI., 1977).
Genus Metelectrona Wisner, 1963
Maxilla greatly expanded posteriorly, extending to or
only slightly behind vertical at posterior margin of orbit; A
base longer than Dbase. Dn and Vn present; 5 PO; 4 VO;
SAO angulate; Pol absent, but AO series behind A base
markedly depressed, forming "Pol grouping". Both sexes
with single, luminous patch supracaudally and infracaudally. Two species; both present in our area.
KEY TO SPECIES
1a So present; total GR 21-23 ...................................... M. herwigi
1b So absent; total GR 23-27 ...................................... M. ventralis
86.96 Metelectrona herwigi
Hulley, 1981
Metelectrona herwigi Hulley, 1981: 50, Figs. 25-26 (40 0 35'S, 09°57'W).
D 14; A20; P 14-15; GR (4-5)+(16-18); AO 15-16.
Attains 55 mm. High-oceanic: upper 100 m (night).
Taken once in region of mixed water "south of South
Africa"; circumglobal convergence species (35°-41°S).
312
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/
...
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\
\
86.96 Meteleetrona herwigi: 4.5 em SL.
86.97 Metelectrona ventralis
(Bekker, 1963)
Myctophum antarcticum: Norman, 1930: 322 (in part). Electrona ventralis Bekker, 1963: 26, Fig. 5 (42°40'S, 39°07'W); McGinnis, 1974: 85*.
Metelectrona ahlstromi Wisner, 1963: 25, Fig. 1 (46°53'S, 179°48'W).
Metelectrona ventralis: Hulley, 1981: 52*.
D 13-15; A 20-22; P 14-16; GR (6-7)+(17-20); AO 13-17.
Attains 107 mm. High-oceanic, mesopelagic; from surface to 350 m (night). West of Cape Peninsula in southern
Benguela Upwelling Region; circumglobal subantarctic
species (36°-51 OS).
:;.~:~::~~
----._---_.-"
86.97 Meteleetrona ventralis: 4 em SL.
Genus Myctophum Rafinesque, 1810
Maxilla slightly to markedly expanded posteriorly, extending past orbit; A base longer than Dbase. Dn and Vn
present; 5 PO; 4 VO; 3 SAO, straight or slightly angulate;
AO series divided into AOa and AOp; 1 Pol; males and
females with supracaudal and infracaudalluminous glands
respectively (Myctophum selenops with supracaudalluminous gland in both sexes). Thirteen species; 7 (possibly 8) in
our area.
KEY TO SPECIES
1a Body short and deep, BD about 3.0-3.3 times
in SL ................................................................. M. selenops
1b Body elongate, BD about 4 times in SL .................................. 2
D 11-12; A 15-16; P 11-12; GR 3+(9-11); AO (5-8)+(5-7).
Attains 39 mm. High-oceanic, mesopelagic; 60 - 175 m
and 800 m (night). Rare species, taken once in our area at
35°Ol'S, 10
0
18'E; bitemperate in Atlantic and in southern
Indian and Pacific oceans.
86.95 Loweina rara
(Uitken, 1892)
Scopelus (Rhinoscopelus) rarus Liitken, 1892: 246 (in part; 200N, 48°_
50 0 W). Myctophum (Myctophum) rarum: Brauer, 1906: 204*. Loweina
rara: Bekker, 1964: 24 *; Pertseva-Ostroumova, 1974: 130*; Wisner, 1976:
78*; Nafpaktitis et al., 1977: 81*.
D 11-12; A 15-16; P 10-11; GR 2+(6-7); AO 6+(5-7).
Attains 45 mm. High-oceanic, mesopelagic; 550 m to
greater than 1 000 m (day); found in upper few metres (not
at surface) to 200 m (night). Not yet recorded from our
area. An uncommon species in Atlantic (46°N-26°S), Indian
(10 0 -22°S) and Pacific (central water masses) oceans.
86.95 Loweina rara: 4 em SL male (after Nafpaktitis et aI., 1977).
Genus Metelectrona Wisner, 1963
Maxilla greatly expanded posteriorly, extending to or
only slightly behind vertical at posterior margin of orbit; A
base longer than Dbase. Dn and Vn present; 5 PO; 4 VO;
SAO angulate; Pol absent, but AO series behind A base
markedly depressed, forming "Pol grouping". Both sexes
with single, luminous patch supracaudally and infracaudally. Two species; both present in our area.
KEY TO SPECIES
1a So present; total GR 21-23 ...................................... M. herwigi
1b So absent; total GR 23-27 ...................................... M. ventralis
86.96 Metelectrona herwigi
Hulley, 1981
Metelectrona herwigi Hulley, 1981: 50, Figs. 25-26 (40 0 35'S, 09°57'W).
D 14; A20; P 14-15; GR (4-5)+(16-18); AO 15-16.
Attains 55 mm. High-oceanic: upper 100 m (night).
Taken once in region of mixed water "south of South
Africa"; circumglobal convergence species (35°-41°S).
312
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/
...
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\
\
86.96 Meteleetrona herwigi: 4.5 em SL.
86.97 Metelectrona ventralis
(Bekker, 1963)
Myctophum antarcticum: Norman, 1930: 322 (in part). Electrona ventralis Bekker, 1963: 26, Fig. 5 (42°40'S, 39°07'W); McGinnis, 1974: 85*.
Metelectrona ahlstromi Wisner, 1963: 25, Fig. 1 (46°53'S, 179°48'W).
Metelectrona ventralis: Hulley, 1981: 52*.
D 13-15; A 20-22; P 14-16; GR (6-7)+(17-20); AO 13-17.
Attains 107 mm. High-oceanic, mesopelagic; from surface to 350 m (night). West of Cape Peninsula in southern
Benguela Upwelling Region; circumglobal subantarctic
species (36°-51 OS).
:;.~:~::~~
----._---_.-"
86.97 Meteleetrona ventralis: 4 em SL.
Genus Myctophum Rafinesque, 1810
Maxilla slightly to markedly expanded posteriorly, extending past orbit; A base longer than Dbase. Dn and Vn
present; 5 PO; 4 VO; 3 SAO, straight or slightly angulate;
AO series divided into AOa and AOp; 1 Pol; males and
females with supracaudal and infracaudalluminous glands
respectively (Myctophum selenops with supracaudalluminous gland in both sexes). Thirteen species; 7 (possibly 8) in
our area.
KEY TO SPECIES
1a Body short and deep, BD about 3.0-3.3 times
in SL ................................................................. M. selenops
1b Body elongate, BD about 4 times in SL .................................. 2