A New Species of Limnadia (Crustacea : Conchostraca) from the Granite Belt in Southern Queensland and Northern New South Wales J. A. WEBB and G. D. BELL Communicated by A. RITCHIE Webb, J. A., & Bell, G. D. A new species oi Limnadia (Crustacea: Conchostraca) from the Granite Belt in southern Queensland and northern New South Wales. Proc. Linn. Soc. N.S.W. 103 (4), (1978) 1979: 237-245. Eulimnadia is synonymized with Limnadia, as the character separating the two, the presence or absence of a spine on the lower distal angle of the telson, is g^adational and therefore unsatisfactory. Limnadia urukhai sp. nov. is distinguished from other species of the genus by the evenly curved dorsal margin and moderate size of its carapace (up to 6.7 mm by 4.3 mm), its few growth lines (maximum 10), small number of pairs of legs (15-16) , two almost equal segments of the sixth endite in the first pair of claspers, and lack of a spine on the lower distal angle of the telson. On the basis of the variability noted in some morphological characters both by previous workers and in the present study, the Australian species Limnadia cygnorum and L. rivolensis may be synonymous. J. A. Webb & G. D. Bell, Department of Geology and Mineralogy, University of Queensland, St Lucia, Australia 4067 ; manuscript received IPJune 1978, accepted 18 October 1978. Introduction The Queensland conchostracan fauna has been httle studied ; of the 23 previously known Australian species, only 3 have been recorded from Queensland. These are Limnadia rivolensis (Brady 1886) and Caenestheria berneyi (Gurney 1927) from the Longreach district (Gurney, 1927) , and Cyclestheria hislopi (Baird 1859) from Rock-hampton (Sars, 1887). In addition, in the Queensland Museum there are specimens from Stradbroke Island provisionally identified as Lynceus cf. tatei (Brady 1886) , and from Cunnamulla labelled Cyzicus cf. dictyon (Spencer and Hall 1896) . Thus it is of considerable interest that several populations of conchostracans collected from small rainwater pools in the Granite Belt of southern Queensland and northern New South Wales proved on close examination to be a new species of Limnadia. Genus Limnadia Brongniart Limnadia Brongnmn 1820, p. 84; Daday 1925, p. 147; Ueno 1927, p. 281; Brehm 1933, p. 31 ; Straskraba 1965a, p. 263. Eulimnadia Packard 1874, p. 55; Sars 1895, p. 14; Daday 1926, p.l; Barnard 1929, p. 251 ; Mattox 1954, p. 6. Paralimnadia Sars 1896, p. 15; Daday 1925, p. 146. Type Species. Limnadia lenticularis (Linnaeus 1761) . Diagnosis. Umbo lacking, lines of growth restricted to marginal portion of shell (i.e. large larval valve), dorsal margin smooth; frontal organ on top of pyriform appendage; first antennae long, unsegmented (after Straskraba, 1965a). Proc. Linn. Soc. N.S.W. , 103 (4), (1978) 1979
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