Paranesippus incisus n. gen., n. sp., a New Parasitic 
Copepod of the Family Pandaridae 1 
Sueo M. Shiino 2 
By the courtesy of Professor Y. Okada, the 
director of our faculty, I have been enabled 
to examine and describe a female copepod 
representing a new genus and species of the 
family Pandaridae. According to him it was 
obtained from the outside surface of Acan- 
thidium eglantina (Jordan and Snyder) caught 
off Kannoura, Koti Prefecture. Sincere thanks 
are hereby returned to the named professor 
for his favours. 
Genus Paranesippus n. gen. 
Female: Cephalon fused with 1st thoracic 
segment; carapace with lateral lobes extending 
back beyond central region. Second to 4th 
segments distinct; 2nd segment with lateral 
plates on both sides, 4th with a pair of dorsal 
plates, and 3rd without either of these. Gen- 
ital segment much enlarged and entirely 
coalesced with 6th segment. Abdomen one 
segmented, attached to ventral surface of 
preceding segment, and invisible from above. 
Antennae and maxillipeds as usual. First 
maxillae transformed into bosses, second max- 
illae two jointed, close to the sides of elongate 
conical mouth tube. Sternal furca absent. 
Four pairs of legs biramose, rami fringed with 
well- developed plumose spines in all. Both 
1 Contribution No. 22 from the Faculty of Fisheries, 
Prefectural University of Mie, Tsu-City, Japan. Manu- 
script received July 26, 1954. 
2 Faculty of Fisheries, Prefectural University of Mie. 
rami two jointed in first pair, three jointed in 
following two pairs, endopod and exopod 
three jointed in fourth pair. Fifth leg rudi- 
ments present. Caudal rami laminate. 
Male unknown. 
As the second to fourth thoracic segments are 
distinct one from another as well as from the 
carapace, and the four pairs of legs are bira- 
mous, the new genus ought to be classified 
among the family Pandaridae. There are later- 
al lobes on the second segment, dorsal plates 
on the fourth, but neither of these on the 
third, and sixth segment is fused with the 
fifth. A similar condition prevails in the gen- 
era Nesippus Heller and Prosaetes Wilson. How- 
ever, the new genus is different from the 
former in the distinctness of the third segment 
from the fourth, and from the latter in the 
shortness of the third segment. Another 
marked difference from both of these genera 
is found in the number of joints composing 
the four pairs of legs, since in these the first 
three legs have the rami two jointed and the 
fourth legs have them one jointed. 
Paranesippus incisus n. sp. 
Type: A single female parasitic on the out- 
side surface of Acanthidium eglantina (Jordan 
and Snyder) caught at a depth of 200-400 
m. off Kannoura, Koti Prefecture (Figs. 1, 2). 
It will be deposited n Mie Prefectural Uni- 
versity. 
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