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

southwestern or western Pacific; recorded depths of
26 to 2 6 metres.
Aegiochus nohinohi sp. nov. (Figs 7 –74)
materiaL examined: Holotype. ♀ (non-ovig. 9.0 mm),
Rumble III Sea Mount, 35°44.5 –44.35’S, 78°30.20–
29.75’E, 9 May 200 , 470–260 m, on scoria rubble, coll.
RV Tangaroa (NIWA 24009).
Paratypes. 4 ♂ (4.9, 5.0, 5.2, 6.7 mm), 4 ♀ (non-ovig.
6.4, 6.9 [dissected], 8.6 [dissected], 9.0 mm), manca (4.4
mm), same data as holotype (all at least slightly damaged;
NIWA 240 0). ♀ (non-ovig. 7.0 mm), Rumble
III Sea Mount, 35°44.38–44.35’S, 78°29.85–29.44’E, 9
May 200 , 420–200 m, on scoria rubble, coll. RV Tangaroa
(NIWA 240 ). ♀ (non-ovig. 7. mm), Rumble
III Sea Mount, 35°44.40–44.7 ’S, 78°29.85–30.02’E, 9
May 200 , 96–4 5 m, on scoria rubble, coll. RV Tangaroa
(NIWA 240 2). ♀ (ovig. 7.5 mm), Rumble III Sea
Mount, 35°44.28–43.98’S, 78°29.89–30.03’E, 20 May
200 , 340–300 m, on scoria rubble, coll. RV Tangaroa
(NIWA 240 3). ♂ (5.2 mm), manca (3.4 mm), Rumble
III Sea Mount, 35°44.34–44.24’S, 78°29.74–29.53’E, 23
May 200 , 200–500 m, on scoria rubble, coll. RV Tangaroa
(NIWA 240 4). 2 ♀ (ovig. 0.2; non-ovig. 9.0 mm),
Rumble V Sea Mount, 36°08.70–40’S, 78° 2.07– .8 ’E,
24 May 200 , 40–690 m, on scoria rubble, coll. RV
Tangaroa (NIWA 240 5).
Non-type. ♀ (ovig. 6.5 mm, crushed), Rumble III Sea
Mount, 35°44.49–44.52’S, 78°29.84–29.40’E, 9 May
200 , 426–270 m, on scoria rubble, coll. RV Tangaroa
(NIWA 240 6). 2 ♀ (ovig 7.7; non-ovig. 9.3 mm), coll.
RV Kaharoa (NIWA 240 7). ♂ (6.4 mm), ♀ (ovig. 8.5,
8.6, non-ovig. 6.0 mm), manca (3.8 mm), 43.0667°S,
78.6500°E, September 963, 549 m (NIWA 240 8).
♂ (6.2 mm), manca (5.0 mm), off Three Kings Island,
34° 3.0’S, 74° .5’E, 9 Feb 974, BS 396, 256 m, coll.
RV Acheron (AK 4604).
?♂ (6.9 mm), east of Bermagui, New South Wales,
Australia, 36°25.2’S, 50° 8.5’E, 5 September 994, 220
m, coll. Southern Surveyor (AM P74738).
desCription: Body 2.8 times as long as greatest width,
dorsal surfaces polished in appearance, widest at
pereonite 6, lateral margins subparallel. Rostral point
present, folded ventrally and posteriorly. Eyes large,
not medially united (just under 50%), separated by
about 6% width of head; each eye made up of ~7
transverse rows of ommatidia, each row with ~9
ommatidia; eye colour red. Pereonite 1 and coxae 2–3
each with posteroventral angle rounded. Coxae 5–7
with entire oblique carina; posterior margins convex,
posterolateral angle blunt (more than 45°). Pleon with
pleonite visible in dorsal view; pleonite 4 with posterolateral
margins not extending to posterior margin
of pleonite 5; pleonite 5 with posterolateral angles
free, not overlapped by lateral margins of pleonite 4.
Pleotelson 0.8 times as long as anterior width, dorsal
surface without longitudinal carina; lateral margins
convex, serrate (weakly), posterior margin converging
to caudomedial point, with 0 RS.
Antennule peduncle articles 3 and 4 .0 times as
long as combined lengths of articles and 2, article 3
2.9 times as long as wide; flagellum with 11 articles,
extending to posterior of pereonite . Antenna peduncle
article 4 2.2 times as long as wide, 0.8 times as long as
combined lengths of articles –3, inferior margin with
0 plumose setae, and 0 short simple setae (anterodistal
angle with 4 long simple setae); article 5 .3 times as
long as article 4, 2.8 times as long as wide, inferior
margin with 2 pappose setae, anterodistal angle with
cluster of 5 short simple setae (long SS, and 2 pappose
setae); flagellum with 14 articles, extending to posterior
of pereonite 3.
Frontal lamina posterior margin free, downwardly
projecting, blade-like, wider than long, posterior
margin concave; anterior margin with median point,
posterior margin not abutting clypeus.
Mandible molar process present, small distinct flat
lobe; palp article 2 with 4 distolateral setae (2 serrate,
2 simple), 3 with 3 setae. Maxillule with 6 terminal RS
( large, 5 slender). Maxilla mesial lobe with 2 RS (
biserrate); lateral lobe with 3 RS. Maxilliped endite with
0 apical setae; palp article 2 with 2 RS; article 3 with 4
recurved RS (all slender); article 4 with 4 hooked RS
(and small slender; unevenly spaced with proximal
3 distal); article 5 articulating with article 4, with 4
hooked/straight RS (2 large, one of which is serrate,
and 2 small slender).
Pereopod 1 basis 2.5 times as long as greatest width;
ischium 0.5 times as long as basis, inferior margin
with 0 RS, superior distal margin with RS; merus
inferior margin with 0 RS ( long and short simple
setae), superior distal angle with 0 RS ( simple seta);
carpus 0.6 as long as merus; inferior margin with RS
(large); propodus .9 times as long as proximal width,
inferior margin with 2 RS (set as and distally), propodal
palm simple, without blade or process, dactylus
smoothly curved, .2 as long as propodus. Pereopod
2 ischium inferior margin with 0 RS, superior distal
margin with RS; merus inferior margin with 3 RS
(set as and 2 plus distal large simple seta), set as in
two groups, superior distal margin with 0 acute RS (
simple seta); carpus similar in size to that of pereopod
or longer than that of pereopod , with inferodistal
lobe, inferodistal angle with RS. Pereopod 3 similar
to pereopod 2. Pereopods 5–7 superior margins of
ischium–carpus without setae. Pereopod 6 similar
to pereopod 7 (with larger RS). Pereopod 7 basis 2.6
times as long as greatest width, inferior margin with
4 palmate setae; ischium 0.5 as long as basis, inferior
margin with 3 RS (set singly), superior distal angle with
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