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Ward, 1933

Carapace extremely globose and convex. Regions faintly defined. Surface covered with distant and fine granules. Coat of very short pubescence. Antero-lateral margins appearing entire, but with rudimentary indentations. Frontal lobes well produced near the median notch and deeply separated from the supraorbital angle. Palm rather short, very inflated; outer surface smooth and glabrous except for the upper border, finely granular; fingers very short. Ambulatory legs very slender and fringed with hairs. (Guinot 1998)

Type locality: Port Jackson, New South Wales, Australia.
Range: Sri Lanka (Guinot, 1976); Japan - Sagami Bay, Siono-misaki, Nanki Shirahama and Tatsugahama (Sakai, 1939), Sagami Bay (Sakai, 1965b), Sagami Bay and Kii Nagashima (Sakai, 1976a), Oshima Passage, Amami-Oshima (Takeda, 1989); East China Sea (Takeda & Miyake, 1968c); Taiwan - Tingch'ieting (Lin, 1949); China - Hainan Island (Dai & Yang, 1991); Nansha Islands (Yang & Dai, 1994); Australia - Port Jackson and Cape Hawke (Ward, 1933b), Freycinet Reach, South-Western Australia (Balss, 1935b, Guinot, 1976), Moreton Bay (Campbell & Stephenson, 1970, Guinot, 1976), Port Jackson and Port Hacking, N.S.W. (Griffin, 1972), Port Jackson (Guinot, 1976); 10-35 m.

Calvactaea tumida