Acanthonyx petiverii H. Milne Edwards, 1834

(Fig. 7A)

Cancer muricatus compressum Petiver, 1712: pl. 20, fig. 8 [type-locality: Barbados].

Acanthonyx petiverii H. Milne Edwards, 1834: 343, pl. 15, figs. 6; Bell 1839: 62; Desbonne & Schramm 1867: 4; Moreira 1901: 66; Rathbun 1925: 142, fig. 52, pl. 44, figs. 1–6, pl. 222; 1933: 13, fig. 11; 1936: 380; Garth 1946: 376, fig. 4, pl. 63; Chace 1956: 159; Garth 1958: 223, fig. 2, pl. 25; Rodríguez 1980: 278; Abele & Kim, 1986: 43; Marcano & Bolaños 2001: 74; Carmona-Suárez & Poupin 2016: 355; Tamburus & Mantelatto 2016: 7, fig. 2 a–b, tab. 1, 2; Poupin 2018: 183; Tavares & Mendonça 2022: 28.

Acanthonyx emarginatus H. Milne Edwards & Lucas, 1843: 9, fig. 2, pl. 5.

Acanthonyx debilis Dana, 1851: 272 .

Peltinia scutiformis Dana, 1851: 273, pl. 5, fig. 7a–c.

Acanthonyx simplex Dana, 1851: 272; Emparanza et al., 2007: 534–535, fig. 1, tab. 1.

Acanthonyx concamerata Kinahan, 1857: 334, fig. 1, pl. 14.

Acanthonyx scutiformis . — Coelho & Torres 1993: 228; Melo 1996: 171; 1998: 455; 2008: 4.

Acanthonyx dissimulatus Coelho in Coelho & Torres 1993: 231, fig. 1; Melo 1998: 455.

Distribution. Western Atlantic and Eastern Pacific. Western Atlantic: USA (Florida), Mexico, St. Thomas, St. John, St. Croix, St. Martin, Guadeloupe, Panama, Martinique, Barbados, Isla de Margarita, Isla de Cubagua, Los Roques, Bonaire, Curacao, Venezuela, and Brazil; Eastern Pacific: California, Galapagos, Mexico, Nicaragua, Costa Rica to Chile (Petiver 1712; Crane 1947; Carmona-Suárez & Poupin 2016; Tamburus & Mantelatto 2016; Poupin 2018).

Material examined. Barbados, Bathsheba, St.Andrew,nearshore rock platform, 13°02’01.64”N, 59°52’59.50”W, 1 Ô CW: 0.4 mm, BLSZ 258 .

Remarks. The single specimen Acanthonyx petiverii was collected by hand in nearshore rubble habitat at low tide on the algae Chaetomorpha crassa (C. Agardh) Kuetzing. Acanthonyx petiverii was first reported for Barbados by Petiver (1712: pl. 20, fig. 8) as Cancer muricatus compressum . This record was recovered by H. Milne Edwards (1834: 343, pl. 15 figs. 6–8), which was based on the report by Petiver. The Barbados Antigua Expedition in 1918 did not record this species for Barbados. Our study confirms the presence of this species in Barbados for the first time since 1712.