Arthropoma cecilii (Audouin, 1826)

(Figs 5H, 7G)

Flustra cecilii Audouin, 1826: 239 .

Arthropoma cecilii: Canu & Bassler, 1929: 296; Marcus, 1937: 96, fig. 49; 1955: 297; Vieira et al., 2008: 31; Ramalho et al., 2011: 777, fig. 5; Bastos et al., 2018: table 1.

Material examined. Abrolhos Bank, Bahia State, Brazil: MNRJ-Bry1376, Parcel dos Abrolhos, 4 m depth, February 2014, col. R. Moura, G. Amado-Filho & A. Bastos.

Short description. Encrusting colonies, forming single layers (Fig. 5H); orange in colour with white ovicells when alive (Fig. 7G). Autozooids hexagonal to rectangular, frontal wall perforated by large circular pseudopores, except in a central area beneath the orifice. Ovicell hyperstomial.

Geographic distribution. Espírito Santo, Rio de Janeiro and São Paulo states (Marcus 1937, 1955; Ramalho et al. 2011), Abrolhos Bank, Bahia State, Brazil (Bastos et al. 2018; present study).

Remarks. Arthropoma cecilii has a worldwide distribution, although its apparent cosmopolitan nature deserves re-evaluation. In the present study, colonies were recorded only at 15 m deep, inside the cores and on the surface of the reefs; those on the external reef surfaces were alive and fertile.