First records of a leptestherid clam shrimp in Australia (Crustacea, Spinicaudata, Leptestheriidae, Eoleptestheria) Author Timms, Brian Australian Museum ,, Australia text ZooKeys 2009 2009-08-26 18 18 1 16 journal article 10.3897/zookeys.18.92 61dc74ce-4143-499f-9c80-489678a65bd1 1313–2970 576494 Key to Genera of Clam Shrimps in Australia 1 Carapace flattened and with growth lines (sometimes inconspicuous); telson with caudal furcae....................................................................................... 2 – Carapace spherical and without growth lines; telson without caudal furcae... ....................................................................................................... Lynceus 1 2 Head with pyriforme frontal organ posterior to compound eyes ................. 3 – Head without a pyriforme frontal organ ..................................................... 5 1 Two described species of Lynceus , but three species discernable genetically ( Zofkova 2006 ). No key to species available. 3 Growth lines weakly developed and generally restricted to carapace margin; movable finger of claspers in males with small sucker-like dorsodistal projection; usually < 10 mm in length................................................................... 4 – Growth lines expressed and covering entire carapace; movable finger of claspers without sucker-like dorsodistal projection; usually> 10 mm in length........... ............................................................................................... Limnadopsis 2 4 Telson with a spine on its lower distal angle ............................. Eulimnadia 3 – Telson without a spine on its lower distal angle............................. Limnadia 5 Carapace elongated, coloured brown/reddish/yellowish and> 6mm in adults; dorsal margin of telson without large spines similarly sized to caudal furcae .... 6 – Carapace circular, transparent and small (< 5mm ); dorsal margin of telson with large spines similarly sized to caudal furcae ...................... Cyclestheria 4 6 Rostrum without an apical spine; telson with <25 spines, usually of variable size.............................................................................................................. 7 – Rostrum with an apical spines; telson with>30 subequal spines.. Eoleptestheria 5 7 Male rostrum in lateral view narrow, only with anterior and ventral margin and no obvious posterior margin; colour of mature specimens brown/reddish...... 8 – Male rostrum in lateral view broad and hatchet-like, with posterior margin in addition to an anterior and ventral margins; colour generally yellowish ........ .................................................................................................... Eocyzicus 6 8 Dorsoposterior end of head (occipital crest) with round and short condylus, distinct from the trunk; generally> 8 mm .............................. Caenestheria 7 – Dorsoposterior of head with a pointed condylus, head and trunk dorsally not distinct; generally < 6 mm .................................................... Caenestheriella