The Marine Fauna of New Zealand: Isopoda, Aegidae (Crustacea)

to 4, with the following numbers (n = 4): pereopod
with 2 (43%) or 3 (50%), once (smallest manca);
pereopod 2 with 2 (50%), (three times), or 3 and
4, each twice; pereopod 3 2 (64%) or 3 (three times)
and 4 once; pereopod never had more than 3 robust
setae on the propodal palm and no specimen had
less than robust setae on any pereopod palm. The
robust setae on the inferior margin of the merus were
consistently +2.
There was no difference between adults and
mancas in the number of robust setae on the anterior
pereopods. The rostrum is longer and straight in adult
specimens whereas in mancas and small specimens it
is bent slightly to the ventral.
The single damaged ovigerous female had oo-
stegites on sternites –5. The robust setae on the propodal
palm of pereopods –3 are notably more slender
and longer than those of immature specimens or
non-ovigerous females; the number of robust setae on
the palm of pereopods –3 is 3, as the most frequent
number for the other specimens.
remarks: Rocinela pakari sp. nov. can be identified by
the wide propodal blade on pereopods –3 which is
provided with – 4 robust setae in conjunction with
well-separated eyes and a gently narrowed pleotelson
posterior margin; in mature specimens the rostrum is
relatively short, anteriorly rounded, and the lateral
margins are very weakly stepped.
Only four species of Rocinela have pereopods –3
with propodal blade as wide as the palm and provided
with more than eight robust setae. Of those that do,
three have eyes that meet in the middle (these being
R. affinis, R. kapala and R. oculata) and all of these have
fewer than 0 robust setae on the pereopod palm; the
fourth species, Rocinela niponia Richardson, 909, a
species in need of redescription, has separate eyes,
fewer robust setae on the pereopod blade ( 0, 8 and
8 on pereopods to 3 respectively) and more robust
setae (5) on the inferior margin of the merus.
prey: Not known.
distribution: Known only from the Chatham Rise,
eastwards from the mid-coast of South Island.
etymoLogy: Pakari is a Mäori word that means strong
(noun in apposition).
Rocinela resima sp. nov. (Figs 9– 22)
materiaL examined: Holotype, ♂ (29 mm), Christabel
sea mount, northeastern Macquarie Ridge, 5 °04.34’S,
64°36.37’E, 4 April 2003, 065– 030 m, rubble, (NIWA
23883).
Paratypes: ♂ (20 mm, dissected), Chatham Rise,
42°43.95’S, 79°53.9 ’W, 8 April 200 , 076–990 m
(NIWA 23884). ♀ (non-ovig. 34 mm), 42°46.99’S,
84
79°59.64’E, 2 April 200 , 000–870 m (NIWA 23885).
♂? (24 mm), Chatham Rise, 42° 46.07’E, 79°55.3 ’W,
20-April 200 , 955–890 m (NIWA 23886).
Non-type material. ♀ (30 mm, non-ovig.), same data
as holotype (NIWA 23887).
Additional material. Chatham Rise. ♀ (24 mm, nonovig.),
42.7597–7557°S, 79.0 05–0 2°W, 28 May 2006,
765–845 m (NIWA 25655). ♀ (2 mm, ovig.), 42.7885–
7992°S, 79.9985–9982°E, 30 May 2006, 020– 054
m (NIWA 25665). 2♀ (2 mm, one damaged, ovig.),
42.7 70–7 65°S, 79.0420–0440°E, 3 May 2006, 957–985
m (NIWA 25666).
desCription: Body 2. times as long as greatest width,
dorsal surfaces smooth, sparsely punctate, widest at
pereonite 5, lateral margins weakly ovate. Rostrum
turned upwards, anteriorly truncate (margins thickened).
Eyes not mesially united, separated by about
28% width of head; each eye made up of ~ 3 transverse
rows of ommatidia, each row with ~9 ommatidia;
eye colour dark brown (bronze). Coxae 2–3 each with
posteroventral angle acute, posteriorly produced; 5–7
without oblique carina. Pleon with pleonite largely
concealed by pereonite 7; pleonite 4 with posterolateral
margins extending to, but not beyond, posterior margin
of pleonite 5; pleonite 5 with posterolateral angles
rounded. Pleotelson .2 times as long as anterior width,
anterior dorsal surface without 2 sub-median depressions,
dorsal surface with short setae; lateral margins
convex, posterior margin with distinct median point,
with 4 RS.
Antennule peduncle article 3 0.9 times as long as
combined lengths of articles and 2, 3. times as long as
wide; flagellum with 6 articles, extending to anterior of
pereonite . Antenna peduncle article 3 2.3 times as long
as article 2, .2 times as long as wide; article 4 .2 times
as long as article 3, .4 times as long as wide, inferior
margin with 0 plumose setae, and 2 simple setae (stiff);
article 5 .6 times as long as article 4, 2.3 times as long
as wide, inferior margin with 2 setae, anterodistal angle
with cluster of 6 short simple setae; flagellum with 17
articles, extending to posterior of pereonite 2.
Frontal lamina longer than greatest width, anteriorly
acute.
Mandible molar process distinct flat lobe; palp article
2 with marginal distolateral setae, and 3 long distolateral
setae; palp article 3 with 20 setae (all distally
bifurcate except distalmost 2 setae). Maxillule with 6 RS
( large, 5 slender, serrate). Maxilla mesial lobe with 2
hooked RS; lateral lobe with 2 hooked RS. Maxilliped
palp article distomesial angle with 0 RS (with long
seta and less long seta mid-margin); article 2 with
3 hooked RS (2 distal, proximal and straight, stiff
seta); article 3 with 2 hooked RS.
Pereopod 1 basis 2.9 times as long as greatest width;
ischium 0.4 times as long as basis, inferior margin with