Macrophthalmus depressus Rüppell, 1830

Macrophthalmus depressus Rüppell, 1830 View in CoL

Macrophthalmus depressus View in CoL — Shen 1940a: 235.

Taxonomy: Crosnier (1965: M. depressus View in CoL sensu stricto), Barnes (1970), Naderloo et al. (2011).

Type: Syntypes RMNH D 42227 (see Fransen et al. 1997).

Type locality: Northern Red Sea.

Distribution: Western Indian Ocean to Arabian Sea: South and East Africa, Madagascar, Red Sea, Persian/Arabian Gulf, Pakistan and western India ( Naderloo et al. 2011).

Habitat: Intertidal; on muddy and sandy-muddy substrates.

Remarks: The local record of M. depressus Rüppell, 1830 was from Shen (1940a), who cited Alcock (1900b) whose material was from Mergui and Aden. Specimens from Mergui were later separated and described as M. teschi by Kemp (1919b), whereas the species M. depressus Rüppell, 1830 sensu stricto was subsequently restricted to the Indian Ocean and Red Sea ( Stephensen 1946; Holthuis 1958; Crosnier 1965; Barnes 1970; Naderloo et al. 2011). The record of M. depressus from Hong Kong thus appears rather unlikely ( Davie 1992b) but is retained here for the moment with doubt.

Macrophthalmus erato De Man, 1888 #

Macrophthalmus erato View in CoL — Koelbel 1897: 716, pl. 1(13, 14); Shen 1940a: 235; Davie 1992a: 347 [key]; Komai et al. 1995: 105; Bravo et al. 2021: tab. 2.

Taxonomy: Tesch (1915), Barnes (1970), Davie

(2012), Shih et al. (2015). Type: Syntypes in NHM 1886.52 (NHM Data

Portal). Type locality: Mergui Archipelago. Distribution: Eastern Indian Ocean to West

Pacific: Bay of Bengal, Peninsular Malaysia, Gulf of Thailand, South China and Taiwan, to Indonesia and northern Australia ( Davie 2012; Shih et al. 2015).

Habitat: Intertidal; substrates of fine sand or mud, near or under shades of mangroves.

Macrophthalmus latreillei (Desmarest, 1822) #

Macrophthalmus serratus View in CoL — Stimpson 1858b: 97; Stimpson 1907: 96, pl. 13(3); Gee 1926: 165 [list].

Macrophthalmus latreillei View in CoL — Gordon 1931: 528; Shen 1940a: 234; Morton and Morton 1983: 157, fig. 11.12(4); Ong Che and Morton 1991: tab. 1; Davie 1992a: 348 [key]; Davie 1992b: tab. 1; SY Lee and Leung 1999: 73; Wong et al. 2021: 66, fig. 103, pls. 19F, 20A.

Macrophthalmus (Venitus) latreillei View in CoL — Barnes 1970: 236.

Macrophthalmus latreille View in CoL — Bones 1982: 691, pl. 3c, d; Morton and Scott 1989: 140, fig. 11.

Macrophthalmus latreilli — Blackmore and Rainbow 2000: app. 1.

Venitus latreillei — Bravo et al. 2021: tab. 2.

Taxonomy: Barnes (1967 2010), Davie (2012), Shih et al. (2015).

Type: Syntypes probably in MNHN ( Davie 2002).

Type locality: “Indes orientales”.

Distribution: Western Indian Ocean to West Pacific: from South Africa, Madagascar, to India, Southeast and East Asia to Japan, New Caledonia and Australia ( Davie 2012; Shih et al. 2015).

Habitat: Intertidal and shallow subtidal; substrates of soft mud in estuaries.

Remarks: Although M. serratus Adams & White, 1849 was still listed as a valid taxon (as in Ng et al. 2008), this species has been regarded a junior synonym of M. latreillei (Desmarest, 1822) ( Barnes 1967 1977) or “... as being synonyms of species within this group” (p. 44, Barnes 2010). The local record by Stimpson (1858b 1907) is thus placed under that of the better understood M. latreillei . We follow Davie (2012) in recognizing this species under the genus Macrophthalmus .

Macrophthalmus pacificus Dana, 1851 #

Macrophthalmus pacificus View in CoL — Gordon 1931: 528; Shen 1940a: 235;

Davie 1992a: 348 [key]; Bravo et al. 2021: tab. 2. Macrophthalmus (Mareotis) pacificus View in CoL — Barnes 1970: 232.

Taxonomy: Barnes (1967), Komai et al. (1995), Davie (2012). Type: Presumably lost. Type locality: Upolu, Samoa. Distribution: Arabian Sea to West Pacific: Western India to Phuket ( Thailand), Southeast and East Asia reaching Ryukyus ( Japan), and New Guinea, northwestern to eastern Australia, Solomon Islands and Samoa ( Komai et al. 1995; Davie 2012). Habitat: Supratidal to intertidal: on mudflats under shades of mangroves, with substantial freshwater influences.

Macrophthalmus tomentosus Eydoux & Souleyet, 1842 #

Macrophthalmus (Mareotis) tomentosus View in CoL — Davie 1992a: 346, pl. 1A, B; SY Lee and Leung 1999: 73; Bravo et al. 2021: tab. 2.

Taxonomy: Barnes (1970), Komai et al. (1995), Shih et al. (2015).

Type: Syntype probably in MNHN.

Type locality: Manila, the Philippines.

Distribution: Eastern Indian Ocean to West Pacific: from Mergui Archipelago, Phuket ( Thailand), Peninsular Malaysia, the Philippines, South China, Taiwan, to Indonesia and New Caledonia ( Shih et al. 2015).

Habitat: Intertidal; on mudflats of very soft substrates with some freshwater influences.