Lynceus macleayanus ( King, 1855 )

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 : 342-343

Lynceus macleayanus ( King, 1855)

Limnetis macleayana King, 1855: 70 ; King, 1864: 162–164, pl. 11, fig. without number; Brady, 1886a: 83 (list); Whitelegge, 1889: 318 (list); Sars, 1895: 35–43, pl. 6,7; Henry, 1924: 121– 122 (list), 135 (text).

Lynceus macleayana .– Sayce, 1903: 258–259, 25 pl. 36, fig. D, 1–3; Dakin, 1914: 295 (list); Chilton, 1917: 481.

Lynceus macleayanus .– Wolf, 1911: 255 (list); Daday, 1927: 6 (key), 53–57, fig. 157; Martin & Belk, 1988: 452 (list); Brtek, 1997: 60 (list).

Type material. None known.

Distribution. Denham Court, Botany Swamps, Parramatta, shallow pools in Moore Park, Liverpool, Hay, Myall Lakes, Paroo River (New South Wales); Elwood, St. Arnaud (Victoria); between Todmorden and Wantapella Swamp, rockhole west of Carmeena–Everard Ranges (South Australia).

Cyzicidae Stebbing, 1910

Cyzicidae Stebbing, 1910 .

Caenestheriidae Daday, 1913 .

Isauridae Bock, 1953 .

Bairdestheriidae Novojilov, 1954 , in part.

Spinicaudata with valves thick and swollen, more or less oval, with growth rings. Umbo well developed. Body of 20–28 segments. No rostral spine. Limbs 9 and 10 of female with ovigerous flagellum. Telson with strong dorsal teeth, denticulated and often irregular in shape. End-claws of telson with fine spines along their inner rim.

With the recognition of the presence of a new species of Eocyzicus in Australia, three genera are now known to occur in Australia: Caenestheria , Caenestheriella and Eocyzicus . Daday (1914) transferred the species described before 1910 into his new genera, but three species were described later. One of these three species, Estheria rufa Dakin, 1914 , cannot be referred to one of Daday’s genera based on the original description. The alternative unsubstantiated scheme of Brtek (1997) of placing all Australian Cyzicidae into the genera Cyzicus and Eocyzicus , which he defines differently from Daday, has not been followed here.

We believe that Eocyzicus is distinctive in having a posterior margin to its rostrum (which gives the entire rostrum a hatchet-like shape) that leads to the origin of the first antenna, and the occipital condylus short and rounded. Cyzicus , Caenestheria and Caenestheriella do not have this combination of characters.