Acantholobulus caribbaeus

Acantholobulus caribbaeus (Stimpson, 1871) (Fig. 3A) Micropanope caribbaeus Stimpson 1871: 108. Hexapanopeus caribbaeus.— Rathbun 1930, 399, pl. 171, figs. 3–5.— Coelho & Ramos 1972: 191.— Mantelatto et al. 2020: 73. Material examined. 1 male (CW 6.55 × CL 5.56 mm), 2 females (CW 5.08 × CL 4.87 mm; CW 6.27 × 4.84 CL mm), station PA03, 16.vii.2021 (CCDB 7462). Geographic distribution. Western Atlantic— USA (Florida), Antilles, north of South America, and Brazil (Pará, Piauí, Paraíba, Pernambuco, Alagoas, Bahia, Espírito Santo; São Paulo, Paraná, Santa Catarina, Rio Grande do Sul) (Coelho & Ramos 1972; Abele & Kim 1986; Rieger et al. 1996; Coelho Filho 2006; Almeida et al. 2007b; Coelho et al. 2008; Felder et al. 2009; Vieira & Calazans 2010; Nobrega & Martinelli-Lemos 2016; Mantelatto et al. 2020 as Hexapanopeus caribbaeus; Marochi & Masunari 2011 as Acantholobulus caribbaeus). Remarks. This is the first record of Acantholobulus caribbaeus from Espírito Santo state. This species was first described as a representative of the genus Micropanope, but upon erection of the genus Hexapanopeus Rathbun, 1898, it was transferred there as Hexapanopeus caribbaeus based on carapace shape (Rathbun 1898). However, recent revisions of the group suggested that this species is clearly separated from Hexapanopeus sensu stricto, and it is actually more closely related to Acantholobulus Felder & Martin, 2003. Therefore, H. caribbaeus was transferred to Acantholobulus (Thoma et al. 2009, 2014), and only recently adopted in WoRMS (2023). The values of the BLAST query cover (92%) and percent identity (>98%) were suitable for this identification, since our sequences aligned with other of the same species (EU863348, EU863381, EU863383, see Thoma et al. 2009) and with congeneric species, Acantholobulus bermudensis (Benedict & Rathbun, 1891) and A. schmitti (Rathbun, 1930) (MF490167, MF490168, see Mantelatto et al. 2018). Sequence accession number (GenBank): CCDB 7462—16S (OR501068) (present study).