86: MYCfOPHIDAE (LANTERNFISHES)
longer than Dbase; P base equidistant from dorsal and ventral margins of trunk. Dn smaller than Vn; 5 PO; 4 VO;
SAO series angulate; AO series divided into AOa and
AOp; males with supracaudalluminous gland; females with
infracaudalluminous gland. Nine species; 3 (probably 4) in
our area.
KEY TO SPECIES
la POj elevated above level of rest of series, well
above level of outer base of V; AOa series
arched, with AOa 2 -AOa 4 elevated ............................ H. hanseni
Ib POjlevel with rest of series, at outer base of V; AOa
series level ....................................................................... 2
2a VLO at LL; SAO! on or in front of vertical
through V02 ....................................................... H. hygomii
2b VLO about midway between LL and outer base of V;
SAO! well behind vertical through V02 ..................... ............ 3
3a A 21-25; C peduncle long and slender; distance
between Prc2 and rear end of D base greater
than distance from tip of snout to V base ................ H. reinhardtii
3b A 18-21; C peduncle normal; distance between
Prc2 and rear end of D base less than distance
from tip of snout to V base .................................. H. proximum
86.60 Hygophum hanseni
(Uming, 1932)
Scope/us hygomii Liitken, 1892: 256 (in part). Myctophum hanseni
Timing, 1932: 132, Fig. 4 (42°32'S, 174°50'E). ? Myctophum reinhardti:
Smith, SFSA No. 199 (in part). Hygophum hanseni: Bekker, 1965: 95*;
Nafpaktitis & Nafpaktitis, 1969: 19*; Hulley, 1972: 222; 1981: 60*; 1984:
76; McGinnis, 1974: 100*'
DB-IS; A 19-22; P 14-16; GR (4-5)+(12-15); AO (5-6)+(6-9). Mature
males with single, supracaudalluminous gland only; mature females Wil;;
1-3 separate or partially-coalesced luminous patches infracaudally.
Attains 67 mm. High-oceanic, mesopelagic; 608 - 728 m
(day); 57 - 110m (night). From 30 0 S on west coast to 33°S on
east coast. Convergence species (30 0 -43°S) in all 3 oceans.
86.60 Hygophum hanseni: 3.5 em SL.
302
~ ~.
~
86.61 Hygophum hygomii
(Lutken, 1892)
Scope/us hygomii Liitken, 1892: 256, Fig. 15 (in part) (38°00'N,
22°20'W). Hygophum hygomi: Bekker, 1965: 69*; Grindley & Penrith,
1965: 282; Nafpaktitis& Nafpaktitis, 1969: 19*; Hulley, 1972: 221; Kreftt,
1974: 230*; Pertseva-Ostroumova, 1974: 78*; Gj0saeter & Beck, 1981:
257. Hygophum hygomii: Hulley, 1981: 63*; 1984: 76.
DB-IS; A 21-23; P 14-17; GR (5-6)+(14-17); AO (6-8)+(5-7). Mature
males with single, supracaudalluminous gland; mature females with 1-3
luminous patches infracaudally, sometimes coalesced.
Attains 68 mm. High-oceanic, mesopelagic; 600 - 800 m
(day); from surface to 300 m at night. Occurs west of Cape
Peninsula and off east coast (25°-37°S). In Mediterranean,
Atlantic (38°-20 o N and 13°-40 0 S), Indian Ocean (24°-40 0 S)
and Pacific (I5°-200S).
86.61 Hygophum hygomii: 5.5 em SL.
86.62 Hygophum proximum
Bekker, 1965
Hygophum reinhardti (non Liitken): Grindley & Penrith, 1965: 282.
Hygophum proximum Bekker, 1965: 81, Figs. 6-9 (00058'S, 82°53'E);
Nafpaktitis & Nafpaktitis, 1969: 17*; Kotthaus, 1972: 16*; Hulley, 1972:
221; Gj0saeter, 1981: 220; Hulley, 1984: 77*.
V 12-14; A 18-21; P 13-14; GR (3-5)+(12-14); AO (3-6)+(5-8). Mature
males with single, black-edged, supracaudal luminous gland; mature
females with single, infracaudalluminous gland.
Attains 50 mm. High-oceanic, mesopelagic; nyctoepipelagic at surface. Occurs south to about 37°S in Agulhas
Current; Indian Ocean (25°N-lOOS) and eastern Pacific
(24°N-24°S).
86.62 Hygophum proximum: 3.5 em SL.
longer than Dbase; P base equidistant from dorsal and ventral margins of trunk. Dn smaller than Vn; 5 PO; 4 VO;
SAO series angulate; AO series divided into AOa and
AOp; males with supracaudalluminous gland; females with
infracaudalluminous gland. Nine species; 3 (probably 4) in
our area.
KEY TO SPECIES
la POj elevated above level of rest of series, well
above level of outer base of V; AOa series
arched, with AOa 2 -AOa 4 elevated ............................ H. hanseni
Ib POjlevel with rest of series, at outer base of V; AOa
series level ....................................................................... 2
2a VLO at LL; SAO! on or in front of vertical
through V02 ....................................................... H. hygomii
2b VLO about midway between LL and outer base of V;
SAO! well behind vertical through V02 ..................... ............ 3
3a A 21-25; C peduncle long and slender; distance
between Prc2 and rear end of D base greater
than distance from tip of snout to V base ................ H. reinhardtii
3b A 18-21; C peduncle normal; distance between
Prc2 and rear end of D base less than distance
from tip of snout to V base .................................. H. proximum
86.60 Hygophum hanseni
(Uming, 1932)
Scope/us hygomii Liitken, 1892: 256 (in part). Myctophum hanseni
Timing, 1932: 132, Fig. 4 (42°32'S, 174°50'E). ? Myctophum reinhardti:
Smith, SFSA No. 199 (in part). Hygophum hanseni: Bekker, 1965: 95*;
Nafpaktitis & Nafpaktitis, 1969: 19*; Hulley, 1972: 222; 1981: 60*; 1984:
76; McGinnis, 1974: 100*'
DB-IS; A 19-22; P 14-16; GR (4-5)+(12-15); AO (5-6)+(6-9). Mature
males with single, supracaudalluminous gland only; mature females Wil;;
1-3 separate or partially-coalesced luminous patches infracaudally.
Attains 67 mm. High-oceanic, mesopelagic; 608 - 728 m
(day); 57 - 110m (night). From 30 0 S on west coast to 33°S on
east coast. Convergence species (30 0 -43°S) in all 3 oceans.
86.60 Hygophum hanseni: 3.5 em SL.
302
~ ~.
~
86.61 Hygophum hygomii
(Lutken, 1892)
Scope/us hygomii Liitken, 1892: 256, Fig. 15 (in part) (38°00'N,
22°20'W). Hygophum hygomi: Bekker, 1965: 69*; Grindley & Penrith,
1965: 282; Nafpaktitis& Nafpaktitis, 1969: 19*; Hulley, 1972: 221; Kreftt,
1974: 230*; Pertseva-Ostroumova, 1974: 78*; Gj0saeter & Beck, 1981:
257. Hygophum hygomii: Hulley, 1981: 63*; 1984: 76.
DB-IS; A 21-23; P 14-17; GR (5-6)+(14-17); AO (6-8)+(5-7). Mature
males with single, supracaudalluminous gland; mature females with 1-3
luminous patches infracaudally, sometimes coalesced.
Attains 68 mm. High-oceanic, mesopelagic; 600 - 800 m
(day); from surface to 300 m at night. Occurs west of Cape
Peninsula and off east coast (25°-37°S). In Mediterranean,
Atlantic (38°-20 o N and 13°-40 0 S), Indian Ocean (24°-40 0 S)
and Pacific (I5°-200S).
86.61 Hygophum hygomii: 5.5 em SL.
86.62 Hygophum proximum
Bekker, 1965
Hygophum reinhardti (non Liitken): Grindley & Penrith, 1965: 282.
Hygophum proximum Bekker, 1965: 81, Figs. 6-9 (00058'S, 82°53'E);
Nafpaktitis & Nafpaktitis, 1969: 17*; Kotthaus, 1972: 16*; Hulley, 1972:
221; Gj0saeter, 1981: 220; Hulley, 1984: 77*.
V 12-14; A 18-21; P 13-14; GR (3-5)+(12-14); AO (3-6)+(5-8). Mature
males with single, black-edged, supracaudal luminous gland; mature
females with single, infracaudalluminous gland.
Attains 50 mm. High-oceanic, mesopelagic; nyctoepipelagic at surface. Occurs south to about 37°S in Agulhas
Current; Indian Ocean (25°N-lOOS) and eastern Pacific
(24°N-24°S).
86.62 Hygophum proximum: 3.5 em SL.