Stimpson, 1857
The only points of difference between this species and Tiarinia cornigera are:
1. The tubercles found on the dorsal surface of carapace are much smaller and sharper; of which, the three branchial tubercles placed on the metabranchial region along the postero-lateral margin, and also three found along the posterior border of carapace are conspicuously erect and spiniform, distinctly larger than the other tubercles.
2. The pseudorostral spines are less markedly deflexed and the preocular spine larger and acuminate, projecting upwards and outwards, the postocular cup is also slenderer than those of T. cornigera.
3. The telson of male abdomen is much longer than wide, while in T. cornigera, it is as long as wide. (Sakai, 1938: 320)
Type locality: Amami-Oshima, Japan.
Range: Japan - Amami-Oshima and Tanegashima (Stimpson, 1907), Ishigaki-jima (Miyake, 1936), Wakayama Prefecture and Tosa Okinoshima (Sakai, 1938a), Hachijo-jima (Sakai, 1954), Sagami Bay, Tosa Bay, Ashizuri-misaki and Hachijo-jima (Sakai, 1965b), Sagami Bay, Shiono-misaki, Ashizuri-misaki, Yoron-jima and Hachijo-jima (Sakai, 1976a), Ogasawara-shoto (Takeda & Kurata, 1977), Kushimoto (Miyake, 1983), Ginowan, Okinawa (Shokita et al., 2000); Taiwan - Lan-Yü (Miyake, 1938); Indonesia - Sulabesi, Maluku (Griffin & Tranter, 1986a); intertidal.