2a Prc2 less than 1 photophore-diameter below
LL; PrcI-Prc2 interspace about equal to
AOp-PrcI interspace .......................................... M. phengodes
2b Prc2 more than 1 photophore-diameter below LL;
PrcI-Prc2 interspace about Yz AOp-PrcI interspace .... .......... ...... 3
3a Body scales cycloid orfeebly crenulate ................................... 4
3b Body scales ctenoid ........................................................... 6
4a Posterodorsal margin of operculum sharply·
angulate and without serrations ............................. M. nitidulum
4b Posterodorsal margin of operculum evenly
rounded, with or without serrations....................................... 5
5a Pol well in advance of vertical at origin of
adipose fin; AO (10-11)+(6-7), total 17-18 ........ M. aurolaternatum
5b Pol on or slightly behind vertical at origin
of adipose fin; AO (7-8)+(2-5), total 10-12 ........... M.obtusirostre
6a Total GR 13-17; SAO series noticeably angulate ........ M. asperum
6b Total GR 18-25; SAO series straight or only slightly
curved ............................................................................ 7
7a Ctenoid scales along A base with 1-3 strong,
posteriorly directed spines; Pol well in advance
of vertical at origin of adipose fin; posterodorsal
margin of operculum serrate GR (5-6)+(13-15),
total 18-21 ........................................................ M. spinosum
7b Ctenoid scales along A base without strong
spines; Pol on vertical at origin of adipose fin;
operculum margin not serrate; GR 7+(17-18) ............ M. fissunovi
86.98 Myctophum asperum
Richardson, 1845
Myctophum asperum Richardson, 1845: 41 (no type-locality given);
Norman, 1930: 325; Nafpaktitis et aI., 1977: 68*; Gj0saeter & Beck, 1981:
257; Hulley, 1981: 79*; 1984: 84.
o 12-14; A 17-20; P 12-16; GR (3-5)+(10-12); AO (6-8)+(4-7). Mature
males with supracaudal luminous gland, consisting of 5-7 overlapping,
scale-like structures; mature females with infracaudal luminous gland,
consisting of 1-3 heart-shaped patches.
Attains 72 mm. High-oceanic, mesopelagic; 425 - 750 m
(day); from surface to 125 m (night). Off east coast and in
Agulhas Water pockets off west coast. Atlantic (200NOSOS), and in Indian and Pacific oceans (North and South
Equatorial Currents and Equatorial Countercurrents, with
northern and southern extensions in western boundary currents).
86.98 Myctophum asperum: 2.5 ern SL.
86: MYCTOPHIDAE (LANTERNFISHES)
86.99 Myctophum aurolaternatum
Garman, 1899
Myctophumaurolaternatum Garman, 1899: 264, PI. 55, Fig. 3 (06°21'N,
80°41 'W); Nafpaktitis & Nafpaktitis, 1969: 28*; Kotthaus, 1972: 23*;
Kawaguchi & Aioi, 1972: 37*; Kawaguchi et aI., 1972: 28*; Gj0saeter,
1981: 220; Gj0saeter & Beck, 1981: 257; Hulley, 1984: 85*.
o 13-14; A 23-24; P 13-15; GR (4-5)+(12-13); AO (10-11)+(6-7).
Males with supracaudalluminous gland of about 9 partially overlapping
scale-like structures; females with infracaudal luminous gland, of 2-3
luminous patches, sometimes partially coalesced.
Attains 105 mm. High-oceanic, mesopelagic; from surface to 300 m (night). In Agulhas Current south to about
31°S; from Sofala Bank to Gulf of Aden and in eastern Indian Ocean (05° -lS0S), southeast Asian seas, and equatorial
Pacific.
86.99 Myctophum aurolaternatum: 3.5 em SL.
86.100 Myctophum fissunovi
Bekker & Borodulina, 1971
Myctophum fissunovi Bekker & Borodulina, 1971: 420, Fig. 2 (06°58'S,
39°37'E).
013; A 18-19; P 17-19; GR 7+(17-18); A07+ (3-4). Males with supracaudal luminous gland of 4 partially overlapping, scale-like structures;
females with infracaudalluminous gland of 2 luminous patches.
Attains 70 mm. High-oceanic, mesopelagic; nyctoepipelagic at surface. Not yet recorded from our area.
South of Zanzibar and southeast of Mauritius (07°-23°S).
~~--- -.-.--:~~.~
(
--~)
86.100 Myctophum fissunovi: adult male holotype (after Bekker & Borodulina,
1971).
86.101 Myctophum nitidulum
Garman, 1899
Myctophum nitidulum Garman, 1899: 266, PI. 56, Fig. 2 (27°50'N,
145°45'W); Kawaguchi & Aioi, 1972: 36*; Pertseva- Ostroumova, 1974:
313
LL; PrcI-Prc2 interspace about equal to
AOp-PrcI interspace .......................................... M. phengodes
2b Prc2 more than 1 photophore-diameter below LL;
PrcI-Prc2 interspace about Yz AOp-PrcI interspace .... .......... ...... 3
3a Body scales cycloid orfeebly crenulate ................................... 4
3b Body scales ctenoid ........................................................... 6
4a Posterodorsal margin of operculum sharply·
angulate and without serrations ............................. M. nitidulum
4b Posterodorsal margin of operculum evenly
rounded, with or without serrations....................................... 5
5a Pol well in advance of vertical at origin of
adipose fin; AO (10-11)+(6-7), total 17-18 ........ M. aurolaternatum
5b Pol on or slightly behind vertical at origin
of adipose fin; AO (7-8)+(2-5), total 10-12 ........... M.obtusirostre
6a Total GR 13-17; SAO series noticeably angulate ........ M. asperum
6b Total GR 18-25; SAO series straight or only slightly
curved ............................................................................ 7
7a Ctenoid scales along A base with 1-3 strong,
posteriorly directed spines; Pol well in advance
of vertical at origin of adipose fin; posterodorsal
margin of operculum serrate GR (5-6)+(13-15),
total 18-21 ........................................................ M. spinosum
7b Ctenoid scales along A base without strong
spines; Pol on vertical at origin of adipose fin;
operculum margin not serrate; GR 7+(17-18) ............ M. fissunovi
86.98 Myctophum asperum
Richardson, 1845
Myctophum asperum Richardson, 1845: 41 (no type-locality given);
Norman, 1930: 325; Nafpaktitis et aI., 1977: 68*; Gj0saeter & Beck, 1981:
257; Hulley, 1981: 79*; 1984: 84.
o 12-14; A 17-20; P 12-16; GR (3-5)+(10-12); AO (6-8)+(4-7). Mature
males with supracaudal luminous gland, consisting of 5-7 overlapping,
scale-like structures; mature females with infracaudal luminous gland,
consisting of 1-3 heart-shaped patches.
Attains 72 mm. High-oceanic, mesopelagic; 425 - 750 m
(day); from surface to 125 m (night). Off east coast and in
Agulhas Water pockets off west coast. Atlantic (200NOSOS), and in Indian and Pacific oceans (North and South
Equatorial Currents and Equatorial Countercurrents, with
northern and southern extensions in western boundary currents).
86.98 Myctophum asperum: 2.5 ern SL.
86: MYCTOPHIDAE (LANTERNFISHES)
86.99 Myctophum aurolaternatum
Garman, 1899
Myctophumaurolaternatum Garman, 1899: 264, PI. 55, Fig. 3 (06°21'N,
80°41 'W); Nafpaktitis & Nafpaktitis, 1969: 28*; Kotthaus, 1972: 23*;
Kawaguchi & Aioi, 1972: 37*; Kawaguchi et aI., 1972: 28*; Gj0saeter,
1981: 220; Gj0saeter & Beck, 1981: 257; Hulley, 1984: 85*.
o 13-14; A 23-24; P 13-15; GR (4-5)+(12-13); AO (10-11)+(6-7).
Males with supracaudalluminous gland of about 9 partially overlapping
scale-like structures; females with infracaudal luminous gland, of 2-3
luminous patches, sometimes partially coalesced.
Attains 105 mm. High-oceanic, mesopelagic; from surface to 300 m (night). In Agulhas Current south to about
31°S; from Sofala Bank to Gulf of Aden and in eastern Indian Ocean (05° -lS0S), southeast Asian seas, and equatorial
Pacific.
86.99 Myctophum aurolaternatum: 3.5 em SL.
86.100 Myctophum fissunovi
Bekker & Borodulina, 1971
Myctophum fissunovi Bekker & Borodulina, 1971: 420, Fig. 2 (06°58'S,
39°37'E).
013; A 18-19; P 17-19; GR 7+(17-18); A07+ (3-4). Males with supracaudal luminous gland of 4 partially overlapping, scale-like structures;
females with infracaudalluminous gland of 2 luminous patches.
Attains 70 mm. High-oceanic, mesopelagic; nyctoepipelagic at surface. Not yet recorded from our area.
South of Zanzibar and southeast of Mauritius (07°-23°S).
~~--- -.-.--:~~.~
(
--~)
86.100 Myctophum fissunovi: adult male holotype (after Bekker & Borodulina,
1971).
86.101 Myctophum nitidulum
Garman, 1899
Myctophum nitidulum Garman, 1899: 266, PI. 56, Fig. 2 (27°50'N,
145°45'W); Kawaguchi & Aioi, 1972: 36*; Pertseva- Ostroumova, 1974:
313