Timms: A revision of Limnadopsis clam shrimps 
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Limnadopsis pilbarensis n.sp. 
Figs. 1, 2H, 5F, 14 
Types. Holotype WAM C39349, allotype WAM C39350, 
paratypes IS, 19, WAM C39351. Type locality: Western 
Australia, Pilbara, N of Karratha, Burrup Peninsula, unnamed 
rockhole, 20°34’25"S 116°48’27"E, A Pinder & J. McRae, 
20.viii.2005. 
Other material. Western Australia: 8 individuals, Pilbara, 
Chichester Range, Beabea Creek, 21°36'S & 118°38'E, 
J. Wombey, 21.vi.1970, WAM C38103; 1 S, 3 9 , via 
Paraburdoo, Ratty Spring on Pirraburdu Creek 7 km west of 
Paraburdoo, 23°15'S 117°28'E, l.iv.1979, J.A. McNamara, 
WAM C39352; 6 individuals, Glen Ross Creek, Pilbara, 
WA, 24°10'44"S 118°0r48"E, sitePSW085 of Department 
of Environment and Conservation, collected by A. Pinder & 
J. McRae, 9.ix.2005. 
Etymology. This species gains its name from the district, the 
Pilbara, from which all the present material was collected. 
I also wish it to honour my great-uncle, Tom Starr, who 
spent much time “in the early days” exploring for gold in 
the Pilbara and made a significant discovery at Marble Bar 
in the 1930s. 
Male. Carapace (Fig. 14A) 10 mm long by 6.5 mm deep, 
L:D ratio c. 1.5. Dorsal margin curved with highest point 
just posterior to larval valve growth line, i.e. about one-third 
of way from anterior end; curvature greater anteriorly than 
posteriorly to this high point. Growth lines 9-10, expressed, 
crowded anteriorly, spaced posteriorly. Posteriorly at hinge 
line, younger (i.e. outer) growth lines humped, each more so 
than previous line. Carapace with granular surface texture. 
Head (Fig. 14B) posteriorly with pyriform frontal organ 
posteriorly, preceded by rounded prominence containing 
eye, a tiny protuberance below eye and a large rostrum at 
right angles to head. Rostrum somewhat longer than distance 
between eye and pyriform organ, curved downwards at its 
apex, and containing triangular naupliar eye dipping at angle 
to the rostrum axis and occupying much of its basal area. 
Rostrum length twice its own basal width. 
First antenna with 9-10 fairly evenly-sized lobes; usually 
a spine present near base on same side as lobes. Second 
antenna with two flagella each of about 12-16 beaded flag- 
ellomeres, these of variable length but generally longer and 
bigger basally. Flagellomeres around midlength each with 
7-9 setae on dorsal surface. 
Trunk segments 25-26 in number. Dorsally, posterior- 
most segment with spineless protuberance, preceding 7-8 
segments each with 3-5 spines on protuberance, then further 
anteriorly another 7-8 segments with long setae varying from 
many posteriorly to 1-2 on more anterior segments. Hand 
of claspers (Fig. 14D) with asymmetrical outgrowth near 
inner basal corner. Immovable finger with numerous spines 
apically, central ones short and stout, giving way to long, 
thin curved spines on inner edge. Palp of movable finger 
short with setae apically. Base of movable finger with evenly 
curved, slight protuberance opposite immovable finger, and 
evenly curved finger terminating in small spine. Palp of hand 
two-segmented, as long as hand in first clasper and about 
half as long again in second clasper; distal segment bearing 
many short setae apically, but no setae on junction of palp’s 
two segments. 
Telson (Fig. 14C) armed with two rows of about 11 strong, 
subequal spines, although anterior spine almost twice as 
Fig. 14. Limnadopsis pilbarensis n.sp., unnamed rockhole, Burrup Peninsula, Pilbara, WA. Male: (A) carapace; ( B ) head; 
(C) telson; ( D ) first clasper. Female: (E) carapace; (F) head; (G) egg. Scale bars 1 mm. Drawn by Jane McRae. 
