FAO Species Identification Guide for Fishery Purposes Western

Loliginidae 769
11a. Arm III sucker rings with 5 to 10 low plate-like teeth; diameters less than those of the
largest tentacular sucker rings (Fig. 11a) which are smooth or have low serrations
around only part of their diameter (Fig. 12) . . . . . . . . . . . . . . . . Nipponololigo sumatrensis
11b. Arm III sucker rings with 3 to 6 low plate-like teeth; diameters approximately equal to
those of the largest tentacular sucker rings (Fig. 11b) which are smooth . . . . . Nipponololigo uyii
91.5 mm
mantle length
110 mm
mantle length
arm III sucker tentacular sucker
ring
ring
a) Nipponololigo sumatrensis
68.5 mm
mantle length
Fig. 11 relative sizes of sucker rings of arms III and tentacles
(after Natsukari, 1984)
92 mm
mantle length
arm III sucker
tentacular sucker
ring
ring
b) Nipponololigo uyi
12a. Suckers on arms II and III equal to or greater than
diameter of largest tentacular sucker rings (Fig. 13a);
suckers of arm II in males greatly enlarged (more than
ventral view
2 times larger than large tentacular sucker diameter,
Fig. 13a); arm suckers with 3 to 7 large low plate-like
Fig. 12 Nipponololigo
sumatrensis
teeth; no paired light organs either side of the rectum on
ink sac (Fig. 14) . . . . . . . . . . . . . . . . . Nipponololigo beka
12b. Suckers on arms II and III generally less than or equal to diameter of largest tentacular
sucker rings (Fig. 13b); suckers of arm III in males somewhat enlarged (about 1.5 times
larger than large tentacular sucker diameter, Fig. 13b); arm suckers with 5 to 13 low
plate-like teeth; paired light organs either side of the rectum on ink sac (Fig. 15) . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Photololigo duvaucelii
II
6.5 mm mantle length
II
III
III
104 mm mantle length
63 mm mantle length
sucker rings of arms
large tentacular
sucker ring
116 mm mantle length
sucker rings of arms
large tentacular
sucker ring
a) Nipponololigo beka b) Photololigo duvaucelii
(after Natsukari, 1984)
(after Adam, 1954)
Fig. 13 relative sizes of sucker rings of arms II and III and the large tentacular sucker rings
II
II
III
III