Cyclestheria hislopi ( Baird, 1859 )

Richter, Stefan & Timms, Brian V., 2005, A List of the Recent Clam Shrimps (Crustacea: Laevicaudata, Spinicaudata, Cyclestherida) of Australia, Including a Description of a New Species of Eocyzicus, Records of the Australian Museum 57 (3), pp. 341-354 : 349-351

Cyclestheria hislopi ( Baird, 1859)

Estheria hislopi Baird, 1859: 232 , pl. 63, fig. 1.

Limnadia hislopi .– Brady, 1886b: 294, pl. 37, figs. 1–3.

Cyclestheria hislopi .– Sars, 1887; Sayce, 1903: 256–257, pl. 36, fig. C, 1–2; Henry, 1924: 122 (list); Daday, 1926: 76–81, fig. 146; Timms, 1979: 57; Timms, 1986: 302–305, fig. 1; Brtek, 1997: 46 (list).

Type material. British Museum, London.

Distribution in Australia. Cyclestheria hislopi is restricted to the far north of Western Australia, Northern Territory and western Queensland, but in eastern Queensland it extends southwards to the limit of the tropics (see Timms, 1986: fig. 2 for further details).

Key to the genera of Australian clam shrimps

Here, we provide a key to the genera of the Australian clam shrimps as accepted in this paper. We believe that all described Australian clam shrimps should be referable to one of the genera mentioned. However, characters might not be present or easily seen in juveniles, so this key is only valid for fully grown animals. Differences also exist between males and females, in particular, in the shape of the rostrum. In Fig. 4 only males (except for F) are shown.

Figures

Fig. 4. Schematic drawings of Australian clam shrimps based on specimens in the private collections of BVT and SR—not to scale: (A)—head of a Limnadopsis sp. male (second antennae removed); note the pyriform dorsal organ (do). (B)—head of Eocyzicus parooensis male (second antennae removed); note the round and short condylus (arrow) of the dorsal posterior end of the head (occipital crest), and the posterior margin (pm) of the rostrum (r). (C)—Head of a Caenestheria sp. male (second antennae removed); note the round and short condylus (arrow) of the dorsal posterior end of head (occipital crest); no posterior margin of the rostrum is present. (D)—Head of a Caenestheriella sp. male (second antennae removed); note the pointed condylus (arrow) of the dorsal posterior end of head; no posterior margin of the rostrum is present. (E)—Clasper of a Limnadia sp. male; note the sucker-like projection (arrow) of the movable finger. (F)—Telson of a Eulimnadia sp. female; note the spine on the lower distal angle of the telson. Abbreviations: a, first antenna; ce, compound eye; cf, caudal furca; div, gut diverticula; f, fornix; lbr, labrum; md, mandible; ne, nauplius eye.