FAO Species Identification Guide for Fishery Purposes Western

716 Cephalopods
Rossia bipapillata Sasaki, 1920
En - Big-eyed bobtail.
Maximum mantle length 50 mm. Mantle short, saccular,
width 70 to 80% of mantle length. Fins circular. Nuchal
cartilage oval. Arm suckers globular; biserial.Tentacular
club slender, with more than 25 minute suckers in
transverse rows. Epirenal bodies present in both
sexes, near the renal papillae. Anal pads present.
Differs from R. pacifica Berry, 1911, in having an oval,
rather than elongate, parallel-sided, nuchal locking cartilage,
and in the tentacle club suckers, which in R.
pacifica are arranged in 8 to 10 rows, rather than 25 or
more as in R. bipapillata.R. pacifica does not possess
papillae on either side of the anus. Minor fisheries
importance at present. Found in Japan and the Philippines.
?
Sepiola birostrata Sasaki, 1918
En - Butterfly bobtail; Fr - Sépiole papillon; Sp - Sepiola mariposa.
Maximum mantle length approximately 12.5 mm. Arm III in both
sexes stout and strongly curved inward (more obviously so in
males); ventral suckers of right arm I and arms II to III of males
larger than dorsal suckers, those on arms III more markedly
enlarged. Left arm I hectocotylized: 2 pairs of normal suckers
proximally, followed by 2 long, slender papillae arising ventrolaterally
to blunt papilla; anterior of 2 papillae longer, and
thicker; a smooth region distal to modified papillae; remaining
distal suckers reduced, borne on swollen, closely packed, prismlike
pedicels, together forming a fleshy mound; distal portion of
arm twisted and strongly recurved.Tentacular club suckers large;
4 suckers in transverse rows; dorsal suckers larger than ventral
suckers. Light organ on each side of ink sac. Colour (preserved
specimens): mantle and head with many minute brown or
black chromatophores. Arms III deep pink; arms I to III with
single rows of large chromatophores, arms IV with double row
of small chromatophores. Differs from Sepiola trirostrata in
lacking the blunt, fleshy papilla in addition to the 2 slender
hectocotylus papillae. Fisheries significance unknown. Philippines,
Singapore.
?
dorsal view
(after Okutani, 1995)
dorsal view
(after Okutani, 1995)