Hyastenus cracentis Griffin & Tranter, 1986

Hyastenus cracentis Griffin & Tranter, 1986 View in CoL

Hyastenus cracentis View in CoL — Loh and Ng 1999: 64, fig. 4.

Taxonomy: Griffin and Tranter (1986), Loh and Ng (1999). Type: Holotype ò ZSC 1377-8/7 (now ZSI), and paratypes in ZSI and ZMA. Type locality: Gasper Straits, Java Sea, Indonesia. Distribution: Arabian Sea to West Pacific: from Red Sea, India, South China, to Java Sea ( Griffin and Tranter 1986; Loh and Ng 1999). Habitat: Presumably subtidal.

Hyastenus diacanthus (De Haan, 1839) #

Naxia dicantha — Stimpson 1857: 218; Stimpson 1907: 16.

Naxia diacantha — Heller 1865: 3.

Halimus diacanthus — Balss 1924: 32.

Hyastenus diacantha — Gee 1926: 166 [list].

Halimus dicanthus — Shen 1931b: 194, text-fig. 12, pl. 14(1); Dudgeon 1982: tab. 1.

Hyastenus diacanthus View in CoL — Shen 1940a: 218; Markham 1982: 355; Markham 1992: tab. 1 [list]; Davie 1992b: tab. 1; ZG Huang et al. 1992: app. 1; Li 2003: 153 [no new specimens]; Wong et al. 2021: 26, fig. 39, pl. 8C.

Taxonomy: Sakai (1938), Griffin and Tranter (1986).

Type: Lectotype and paratypes in RMNH D 742; and paralectotypes in RMNH (designated by Yamaguchi and Baba 1993; see also Fransen et al. 1997).

Type locality: Japan, locality unspecified.

Distribution: West Pacific: Indonesia, to South China Sea, Taiwan Strait and Japan ( Griffin and Tranter 1986).

Habitat: Subtidal; substrates muddy-sandy or shelly; depths of 50 to 100 m ( Dai and Yang 1991).

Hyastenus ducator B.Y. Lee & Ng, 2020 View in CoL #

Hyastenus sp. — Wong et al. 2021: 26, fig. 40, pl. 8D.

Taxonomy: BY Lee and Ng (2020).

Type: Holotype ò in IOCAS and paratype òò in ZRC 2002.0497 View Materials .

Type locality: Qingdao, China.

Distribution: East Asia: Coasts of China from Guangdong to Qingdao, Korea and possibly Japan ( BY Lee and Ng 2020).

Habitat: Subtidal.

Remarks: In reporting a rare local “ Hyastenus sp. ”, Wong et al. (2021) made comparisons with illustrations of “present anan previously undescribed form, now as H. ducator (BY Lee and Ng 2020) . H. pleione ” recorded from Shandong, China by Shen (1932b), sharing more markedly six stout tubercles aligned as a “Y” shape on the gastric region. In elucidating identities of H. pleione (Herbst, 1803) , Shen’s record was shown to represent a previously undescribed form, now known as H. ducator (BY Lee and Ng 2020) . This species has also been recorded along coasts of South China at Shanwei, Guangdong, and the presence in seas of Hong Kong is not unexpected.

Hyastenus hilgendorfi De Man, 1887 View in CoL #

Hyastenus hilgendorfi View in CoL — Clark et al. 2008: 920.

Taxonomy: Griffin (1968a), Griffin and Tranter (1986).

Type: Syntypes probably in ZSI ( Davie 2002).

Type locality: Eplhinstone Island and King Island Bay, Mergui Archipelago.

Distribution: Western Indian Ocean to Central Pacific: from East Africa, Red Sea, Iranian Gulf, India, to South China, the Philippines, Indonesia, Australia and Hawaii ( Griffin and Tranter 1986).

Habitat: Subtidal; coral reef; substrates sandy with corals, shells, and rubble; depths 2 to 54 m ( Davie 2002).