Stylopoma hastata Ramalho et al., 2018

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 : 17-18

Stylopoma hastata Ramalho et al., 2018

( Fig. 8C–F )

Stylopoma hastata Ramalho et al., 2018: p. 168 , fig. 5C–E.

Material examined. MNRJBRY-1453 , MNRJBRY-1474 , MNRJBRY-1494 , MNRJBRY-1495 : Brazil, Maranhão state (Sta #7, 00°14.742’S – 044°54.089’W), 23 m, on sponges, 29 September 2014; MNRJBRY-1460, MNRJBRY- 1549: Brazil, Pará state (Sta#6, 00°45.359’N – 046°38.49’W), 50 m, on rhodoliths, 29 September 2014; collected by Fernando Moraes & Rodrigo Moura (NHo Cruzeiro do Sul ).

Distribution. Known from Maranhão and Pará states in Northern Brazil (present study), and Abrolhos Bank, Bahia state, Brazil ( Ramalho et al. 2018).

Remarks. Stylopoma hastata Ramalho et al., 2018 was originally described from the Abrolhos Bank, Bahia state, Brazil, based on non-ovicellate material. Northern Brazil specimens allow the first description of ovicells ( Fig. 8C–E ), which are globose [L 321–380–408 (SD 34, N 8); W 330–418– 501 µm (SD 50, N 8)] with ooecial surface similar to the frontal shield of autozooids, evenly perforated by small pseudopores at the centre of polygonal depressions; small triangular avicularia [L 47–51– 58 µm (SD 6, N 3)] (similar to those observed on the autozooids) are found on the ovicell surface; the aperture consists in a crescentic lumen formed by the fusion of the labellum at the center, arising from the proximal edge ( Fig. 8D–E ). The figures also show the characteristic elongate avicularia ( Fig. 8C, F ).

Figures

FIGURE 8. A, B. Parasmittina sp. (MNRJBRY-1518). A. Part of the colony showing zooids with lateral and frontal (arrowed) avicularia B. Autozooids, one with a large, triangular avicularium (arrowed). C–F. Stylopoma hastata Ramalho et al., 2018 (MNRJBRY-1495). C. Colony with one ovicell bearing a small triangular avicularium on the frontal surface, and large interzooidal avicularia. D. Colony with several ovicells with or without avicularia, and some autozooids with calcified orifices. E. Ovicell bearing a small, triangular avicularium. F. Detail of the large interzooidal avicularia. Scale bars: A, B, D, F, 200 µm; C, 500 µm; E, 50 µm.