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Records of the Australian Museum (2009) Vol. 61 
in the antennule than in the male. In the present material, 
the rostrum is as long as deep and there are about 6-8 
lobules in the first antenna while the flagellomeres of the 
second antenna usually numbering 12-15; both figures are 
a little less than those of males. Number of body segments, 
posterodorsal armature, and the telson are similar to those 
in males. 
Eggs. Eggs are different in the eastern and western popula¬ 
tions studied (Fig. 3D,E). In both they are round and about 
150 pm in diameter (range 144-171 pm, n = 10), and the 
surface has numerous straight furrows not as wide or deep 
as in L. birchii. In the western population the intervening 
ridges are sharper and the furrows tend to be short and 
arranged in short, nested Vs of 2-3 furrows, while in the 
eastern population, the ridges are frilly, longer and more 
randomly arranged. The significance of these different egg 
sculpturings is unknown; the eggs could be variable as in 
L. parvispinus (see later), or the differences could indicate 
separate species in the east and west. The later possibility is 
not supported by any consistent differences in the morphol¬ 
ogy of the adults. 
Comment. Novojilov (1958) transferred Limnodopsis 
tatei into a new genus Limnadiopsium which has not been 
followed here (see later). 
Limnadopsis parvispinus Henry, 1924 
Figs. 2C, 4C, 5G,H, 8, 9 
Limnadopsis parvispinus Henry, 1924: 121 (list), 132 (key), 
132-133, pi. 32, figs. 1-7; Brtek, 1997: 58 (list); Richter 
& Timms, 2005: 349. 
Types. Syntypes (3 6,9 $) in AM G5524 and G5226. 
Comment on types. The syntypes are from two different 
localities about 305 km apart. The inaccurate (see below) 
original description seems to be based on all specimens, 
and given the variability in this species (see below), it was 
decided not to choose a lectotype from a particular locality 
because this may jeopardize future detailed work on this 
species/species complex. 
Material. New South Wales: 10(3", 10$, 180 km NW 
of Bourke, Brindingabba-Willara Crossing Road, 29.3°S 
144.7°E, 9.iii. 1995, B.V. Timms, AM P47126; 66, 3$, 
NW of Bourke, Bloodwood Station, Lower Crescent pool 
on Bell Ck, 29°32’S 144°52’E, 10.vi. 1998; B.V. Timms, 
AM P76804; 1 6, 4 $, NW of Bourke, Bloodwood Station, 
Marsilea Pool, 29°33'S 144°52'E, 7.xii.l999, B.V. Timms, 
AM P76805; 10c?, 15$, NW of Bourke, Tredega Station, 
Johnsons Tank, 29.5°S 144.9°E, 264.1995, B.V. Timms, AM 
P47124; 36,9 2, NW of Bourke, Tredega Station, Johnsons 
Tank, 29.5°S 144.9°E, lO.iii. 1995, B.V. Timms, AMP47125; 
26, 4$, NW of Bourke, Muella Station, vegetated pool 
no. 3 near homestead, 29°31’S 144°56’E, 7.xii.l999; B.V. 
Fig. 8. Limnadopsis parvispinus Henry, syntypes, Mossgiel, NSW. (A) male carapace; ( B ) male head; (C) male telson; 
(D) female carapace; (E) female head. Scale bars 1 mm. 
