The Cirolanidae (Crustacea: Isopoda) of Australia: The Genus Pseudolana from the Queensland Coasts with Description of Three New Species

The cirolanid genus Pseudolana is fully described, as are 4 species, of which 3 are new to science, I having been previously described as Orolana concinna. The relationship of the new genus to other cirolanid genera is discussed. Briefnotes are given on the habitat and distribution of the members of the genus. 1 Manuscript accepted 29 May 1979. 2 University of Queensland, Department of Zoology, Brisbane, Queensland, Australia 4067. slender, endite with single coupling hook. Mandible with strongly produced anterior tooth and 3-segmented palp, segment I almost as long as segment 2. Pereiopods without natatory setae. Both rami of pleopods I and 2 elongate, 3-5 becoming broader posteriorly; pleopod 2 of male with appendix masculina arising midway along and extending beyond inner margin of endopod. Pleopods 3-5 of both sexes with endopod glabrous. Pleopods 1-5 with external margin of protopod formed into a lobe. Telson with posterior 2/3 depressed, posterior margin of telson and uropodal rami with fringe of long plumose setae. Protopod of uropod produced, margin of exopod of uropod with spines and setae. All pleon segments exposed with lateral margins free; lateral margin of pleon segment 1 not produced. DIAGNOSIS: Cirolanidae with linear frontal lamina and freely projecting clypeus; anterior margin of cephalon without conspicuous rostral point; pleopod I with both rami elongate, pleopod 2 with appendix masculina arising midway, pleopods 1-5 with lobe on external margin of protopod, endopods of pleopods 3-5 glabrous. ETYMOLOGY: From the greek Pseudo meaning false, and (Oro) lana. GENUS TYPE: Orolana concinna Hale, 1925. RELATIONSHIPS: This genus can be placed in the group of genera called "group Eurydice" by Monod (1930). This group includes the genera Eurydice Leach, Excirolana Richardson (including Pontogeloides Barnard), Pontogelos Stebbing (Monod, 1972) and to 153 Genus Pseudolana Bruce AN EXAMINATION of oceanic sandy beaches around Moreton Bay revealed the presence of 2 species of cirolanid isopod that at first glance appeared to belong to the genus Orolana Leach. While collecting around Hinchinbrook Island off the North Queensland coast, I obtained a third species from the mobile sands of the mountain stream outflows where small tidal mangrove swamps form. The fourth species was obtained from the collections of the Queensland Museum. Of the 4 species, I had previously been described and placed in the genus Orolana. However, all 4 species show a combination of characters which prevent their inclusion in that genus and place them within the "group Eurydice" of Monod (1930). These species all conform to the genus Pseudolana Bruce, and the original diagnosis is here expanded. Pseudolana Bruce 1979: 112. Cirolanidae with antennule peduncle 3 segmented, segment I tending to be at right angles to remainder of peduncle; antenna peduncle 5 segmented; flagella of both antennae of moderate length. Frontal lamina linear, clypeus freely projecting; cephalon with or without rostral point. Maxilliped