NO. 3567 LABIDOCERA JOLLAE GROUP—FLEMINGER iL 7 
Prosome-Urosome Length 
Total Length (mm) Ratio 
no. mean range st. dev. median range 
adult 9? 144 2.95 2.57-3.49 0.140 3.5:1 3.1-4.0:1 
adult A 135 2.95 2.53-3.25 0.148 3.3:1 3.0-3.8:1 
adult 7 B 122 2.89 2.51-3.25 0.152 3.4:1 2.9-4.1:1 
st. V cop. ? 25 2.13 2.00—2.32 3.631 3.4-3.9:1 
st. Vcop.A co 25 2.12 1.93-2.31 3.4:1 3.2-3.7:1 
st. Vcop.B of 25 2.09 1.91-2.24 3.4:1 3.0-3.6:1 
Diaenosis.— Distinguished from other species by (1) details of 
sexually modified structures, (2) secondary loss of head-hooks in the 
mature stage of both sexes, and (3) occurrence of two morphologically 
different kinds of adult male (morph A and morph B), the differences 
being concentrated in sexually modified appendages. The name 
diandra [Greek] refers to the two morphologically distinct kinds of 
males comprising this new species. 
Adult Al segments 24—25 fused as in genus (fig. 6d), segments 8-9 
imperfectly fused as in jollae and kolpos; segments 6 and 7 perfectly 
separate. Forehead rounded, no head-hooks in adult, dorsal sub- 
cuticular eye lenses large in male, left and right lenses touching 
(fig. 8k); dorsal eye lenses in female small, well separated (fig. 6d). 
TIV and TV not fused. Rostrum as in jollae except lacking asym- 
metry in male (fig. 10a). 
Adult female: TV in dorsal view produced posteriad in subequal 
lobes; in lateral view lobes flanking proximal end of genital segment 
(figs. 6e,f), reminiscent of detruncata; robust prong ventral to right 
lobe and extending posterolaterad (figs. 6d,f), left side of TV without 
prong. Urosome asymmetrical, in dorsal view with relatively long 
genital segment curving to right; anal segment small; caudal rami 
asymmetrical, left ramus larger, second innermost seta moderately 
expanded in proximal portion (fig. 6d). Genital segment with robust 
hooked process extending from anterior portion of left side (figs. 
6d,e); posterodorsal portion of genital serzment with swollen dorsal 
surface lightly sculptured. Genital pore displaced to right of mid- 
longitudinal axis (fig. 6f). 
P5 with apex of exopod deeply bifurcated, weakly asymmetrical, 
right exopod longer; one or two small, lateral denticles occasionally 
present on exopod; endopods asymmetrical, left endopod apically 
bifurcated, right endopod spinelike with minute lateral prong (fig. 65). 
Adult male: Both male forms essentially identical in prosome and 
urosome; TV corners symmetrical with simple rounded margins not 
flaring outward (fig. 7c). Caudal rami elongate, length exceeding 
combined lengths of preceding three urosomal segments (fig. 87). 
Forehead rounded, lacking head-hooks and crest (fig. 8h). 
221-531—67—_-2 
