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

Figure 107. Rocinela garricki Hurley, 957. Male, 5.5 mm, Camp Bay, NIWA 23855. A, mandible; B, mandible molar and
incisor; C, mandible palp article 3; D, maxillule apex; E, maxillule; F, maxilla; G, maxilla apex; H, maxilliped; I, maxilliped
palp articles 2 and 3; scales, mesial margin palp article ; K, frons.
3 (36%) and 4 (43%) most frequent, 2 and 5 occurring
once and twice respectively.
The setation of the palms of pereopods –3 is highly
consistent with 8 RS being the most frequent; pereopod
palm (n = 4) with 8 (60%) or 9 (40%) RS, pereopod 2
palm (n = 4) with 7 (27%) or 8 (73%) RS and pereopod
3 (n = 3) palm 8 (93%), 7 RS occurring once. The RS
on the inferior margin of the merus was consistently
+2, although some of these were missing and there
may be some variation.
There is no discernable difference in the number of
robust setae between males and females, nor in relation
to size—the smallest male ( 5.5 mm) and female
( 6.5 mm) had similar counts for robust setae: pleotelson
RS ( ), pereopods –3 (8 and 9) and uropods
72
(endopod mesial with 2 and 3, lateral with 3 and 4,
exopod mesial without, lateral 8). The characteristic
shape of the rostrum is only evident in larger presumably
mature specimens.
remarks: A combination of characters serves to readily
identify Rocinela garricki: the eyes are relatively widely
separated, mature specimens have a distinctly tri-
cornered rostrum, the anterior margin of which is often
bent ventrally, the anterior pereopods usually have 8
or 9 robust setae, the propodal blade is provided with
numerous stiff simple setae (in contrast to the more
usual single seta), the uropodal exopod has 8 robust
setae on the lateral margin, none on the mesial margin,
the uropodal endopod is relatively broad with 2 or 3