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Records of the Australian Museum (2009) Vol. 61 
rounded ridge, these meeting end-to-end in rounded protru¬ 
sions. Either series of such protrusions or ridges forming 
edges of each polygon. 
Comments. Other specimens in the single collection avail¬ 
able show little variation from the type material. No other 
species of Limnadiopsis is so small yet has 18-19 growth 
lines, nor such a high L:D ratio, only 24 trunk segments, a 
spinous projection on the ventroposterior comer of the telson, 
a depression in the dorsal surface of the telson, and the unique 
egg characteristics. Overall, L. minuta is reminiscent of L. 
tatei, but it lacks the dorsal carinae of the carapace of L. tatei 
(although sometimes these are absent in L. tatei, too), the 
carapace shape is similar in males and females in L. minuta, 
its telsonic spines are more numerous and less variable in 
size and position than those of L. tatei, and there are fewer 
spines on the caudal claw in L. tatei. It is perhaps tempting to 
consider L. minuta as comprising juveniles of L. multilineata 
n.sp. (see below), especially given the superficially similar 
telsons and the large number of growth lines, but this is not 
possible in light of the markedly convex dorsal margin of 
the carapace in females of L. multilineata ; the presence of a 
conspicuous ventroposterior expansion of the carapace and 
lack of a ventroposterior spinous outgrowth of the telson in 
that species; different spination of the antennal rami; and 
the completely different egg stmcture. 
Limnadopsis multilineata n.sp. 
Figs. 2E, 5C, 11 
Types. Holotype c3WAM C39334; allotype 9 WAM 
C39335, paratypes WAM C38102. Type locality: Western 
Australia, Kimberley, Mitchell Falls, rock pools at the top. 
14°49'S 125°42'E, 14.U973, Smith-Johnstone. 
Other material. Western Australia: via Broome, Lake 
Campion, 17°50'S 122°45'E, 28.iii.1996, C. Brockway, 
WAM C38103. 
Distribution. Kimberley and adjacent area of northwestern 
Western Australia. 
Etymology. The specific name refers to the large number of 
growth lines in this species. 
Male. Carapace of mature individuals (Fig. 11 A) about 
10-12 mm long and 6-8 mm high, L:D ratio c. 1.5-1.6. 
Dorsal margin almost smooth and nearly straight, anterior 
angle distinct, about 100°, and dorsoposterior margin slightly 
depressed and ending in rounded protrusion. Umbo distinct, 
triangular in shape, but not protruding above the dorsal 
margin. Anterior edge of carapace evenly curved, ventral 
edge almost straight, and posterior edge protruding and 
rounded so that it is convex posteroventrally and concave dor- 
soposteriorly. About 20 distinct growth lines with a further 
10-12 closely spaced lines on outer 10-15% of carapace. 
Carapace brown and surface apparently granular, but “grains” 
actually comprising numerous dendritic pigment cells. 
Fig. 11. Limnadopsis multilineata n.sp., Mitchell Falls, Kimberley, WA. Male: (A) carapace; ( B ) head; (C) telson; 
(D) a middle flagellomere of second antenna. Female: (E) carapace; ( F) head. For clarity, some growth lines are 
incompletely shown anterior to umbo and marginally. Scale bars 1 mm. 
