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.

Figures

FIGURE 4. A–C. Micropora amapaensis Ramalho & Moraes n. sp. (Holotype MNRJBRY-1408). A. General view of the colony. B. Autozooids with perforate cryptocyst with opesiules, lateral tubercles, and ovicells. C. Detailed view of the frontal pores with radiating tiny spines (arrows). D, E. Cribrilaria smitti (Winston, 2005) (MNRJBRY-1445). D. Part of a colony showing autozooids with setiform papillae (arrows) and seven oral spines, and an ovicellate zooid with four spines. E. Detail view showing the flared open mandible of an avicularium. Scale bars: A, 500 µm; B, D, 100 µm; C, E, 50 µm.