Cribrilaria smitti ( Winston, 2005 ), 2021

Ramalho, Laís V., Moraes, Fernando C., Salgado, Leonardo T., Bastos, Alex C. & Moura, Rodrigo L., 2021, Bryozoa from the reefs off the Amazon River mouth: checklist, thirteen new species, and notes on their ecology and distribution, Zootaxa 4950 (1), pp. 1-45 : 9

Cribrilaria smitti ( Winston, 2005) n. comb.

( Fig. 4D, E)

Puellina smitti Winston, 2005: p. 34 , figs 89–93; Winston & Woollacott 2009: p. 257, fig. 14; Winston 2016: p. 30, fig. 16.

Material examined. MNRJBRY-1445: Brazil, Maranhão state (Sta #7, 00°14.742’S – 044°54.089’W), 23 m, on sponge, 29 September 2014, collected by Fernando Moraes & Rodrigo Moura (NHo Cruzeiro do Sul ) .

Description. Colony encrusting, multiserial, unilaminar. Autozooids rounded hexagonal, longer than wide [L 231–302–346 (SD 31, N 16); W 176–216– 268 µm (SD 26, N 16)], separated by deep sutures; frontal shield without umbo, with 13–16 prominent costae radiating from the middle region and 5–7 intercostal lacunae between adjacent costae ( Fig. 4D). Orifice transversally D-shaped [L 39–44–53 (SD 4, N 8); W 46–53– 61 µm (SD 4, N 11)], proximal border straight; six oral spines, four spines still visible in ovicellate zooids ( Fig. 4E). Triangular suboral area formed by the first pair of costae, raised, with a central elliptical pore and a lower row with 5–8 pores; papilla pore present inside the triangular suboral area with a short seta ( Fig. 4D, E see arrows). Interzooidal avicularia [L 114–137– 155 µm (SD 17, N 6)] on a large and almost circular cystid bearing four pore-chamber windows; rostrum flared at each end and relatively narrow in the middle portion; proximal region almost transversally D-shaped; flared mandible, longer than rostrum, broadening abruptly beyond palate, subcircular, ending in a pointed tip (cordiform-shape) ( Fig. 4E). Ovicell type A (sensu Bishop & Househam 1987), slightly wider than long [L 113–123–131 (SD 9; N 3); W 135–136– 138 µm (SD 3, N 2)]; ooecial surface smooth with a medial-proximal umbo ( Fig. 4D).

Distribution. Known from the Caribbean ( Winston 2005; Winston & Woollacott 2009; Winston 2016), and off the Amazon River mouth (Maranhão state, Northern Brazil) (present study).

Remarks. We follow Rosso et al. (2018) revision of Puellina , Cribrilaria , and Glabrilaria in transferring Puellina smitti to Cribrilaria . This latter genus is characterized by the presence of an imperforate ovicell (A– or B– type) and avicularia, while Puellina lacks avicularia and it has perforated and C-type ovicell. Two additional congeners have interzooidal avicularia with such a flared mandible: Cribrilaria arrecta ( Bishop & Househam, 1987) , and C. flabellifera ( Kirkpatrick, 1888) . Both species also have six oral spines, but C. arrecta has 8–9 costae, which are often medially fused to form a strongly raised ridge or umbo, and 2–3 lacunae between adjacent costae, and the mandible of the interzooidal avicularium is flared but completely triangular at the tip; C. flabellifera has a very large median suboral lacuna, frontal shield with 14–15 costae and 4–5 pores between adjacent costae, and the ovicell has four or more radiating ridges and a median suture on the ooecial surface. Cribrilaria smitti n. comb. colonies from Brazil are slightly smaller than those from the Caribbean ones (autozooids: L 332, W 228 µm; orifice: L 50, W 60 µm) ( Winston 2005). This is the first record of this species from the South American coast.