Callopora rylandi Bobin & Prenant 1965

Autor: Ramalho, Laís V., Rodríguez-Aporta, Raquel, Gofas, Serge
Rok vydání: 2022
Předmět:
DOI: 10.5281/zenodo.6301213
Popis: Callopora rylandi Bobin & Prenant, 1965 (Fig. 3) Callopora rylandi Bobin & Prenant, 1965, fig. 36a, b; Prenant & Bobin 1966: 231; Hayward & Ryland 1998: 162, fig. 41. Material examined. MNCN 25.03/4281: BV12, 112��� 120 m; coll. Universidad de M��laga (UMA); one living fragment, one dead fragment. Description. Colony encrusting, unilaminar (Fig. 3A). Zooids oval [L 306���424���511 (N 21, SD 48), W 211��� 268���342 ��m (N 21, SD 34)] with a narrow, smooth gymnocyst, more easily visible at the proximal border; cryptocyst reduced (Fig. 3A���E). Peripheral spines broad and flattened, commonly 11���13, arched over the opesia, meeting the opposite spine in the midline, and expanding and merging with each other (Fig. 3B, C). The most distal pair of spines sometimes forms a small bifurcate tip directed towards the orifice (Fig. 3B, C). Distal region of the zooid bearing four to six additional erect, hollow, strong spines in both non- and ovicellate zooids (Fig. 3A, B, E). Small avicularium [L 64���69���75 ��m (N 3, SD 6)] on the gymnocyst with a triangular, pointed rostrum, directed laterally, distally or proximally (Fig. 3D, see arrow). Ovicell hyperstomial [L 175���186���211 (N 6, SD 13), W 159���182���218 ��m (N 6, SD 21)], subglobular with a nodular endooecial surface and a smooth marginal ectooecial band; aperture opening above the maternal orifice (Fig. B���D). Ancestrula smaller than the autozooids [L 249, W 185 ��m (N 1)], oval, with a narrow gymnocyst bearing 10 erect spines around the opesia (Fig. 3E, see asterisk). Remarks. Callopora rylandi was described from Roscoff (France) and there are other records in the North Atlantic (British Isles and Ireland), although this is the first record for the Alboran Sea. Despite zooids being larger in the original and other North Atlantic material (original: L 400���550, W 250���385; NA: L 400���600, W 260���360 ��m), and despite the presence of six oral spines in the ovicellate zooids (four in the original description), the remaining morphological characters are very similar, supporting the identification. This species is very similar to Membraniporella nitida (Johnston, 1838), also recorded from the Mediterranean and the Strait of Gibraltar (L��pez de la Cuadra & Garc��a-G��mez 1994; Rosso & Di Martino 2016), regarding the position and shape of the spines and shape of the ovicell, but in M. nitida the ovicell is closed by the maternal operculum, and there are fewer spines.
Published as part of Ramalho, La��s V., Rodr��guez-Aporta, Raquel & Gofas, Serge, 2022, Preliminary account on the bryozoans of the Alboran platform (Western Mediterranean), with description of two new species, pp. 53-91 in Zootaxa 5094 (1) on page 65, DOI: 10.11646/zootaxa.5094.1.2, http://zenodo.org/record/5964865
{"references":["Bobin, G. & Prenant, M. (1965) Callopora rylandi n. sp. (Bryozoaires Chilostomes, Alderinidae). Cahiers de Biologie Marine, 6, 277 - 291.","Prenant, M. & Bobin, G. (1966) Bryozoaires, deuxieme partie. Chilostomes Anasca. Federation Francaise des Societes de Sciences Naturelles, Paris, 647 pp.","Hayward, P. J. & Ryland, J. S. (1998) Cheilostomatous Bryozoa. Part 1. Aetoidea Cribilinoidea. In: Barnes, R. S. K. & Crothers, J. H. (Eds.), Synopses of the British Fauna. New Series. The Linnean Society of London, London, pp. 1 - 366.","Johnston, G. (1838) A history of British Zoophytes. W. H. Lizars, Edinburgh, London and Dublin, 341 pp. https: // doi. org / 10.5962 / bhl. title. 110844","Lopez de la Cuadra, C. M. & Garcia-Gomez, J. C. (1994) Zoogeographical study of the Cheilostomatida from the Straits of Gibraltar. In: Hayward, P. J., Ryland, J. S. & Taylor, P. D. (Eds.), Biology and Palaeobiology of Bryozoans. Olsen and Olsen, Fredensborg, pp. 107 - 112.","Rosso, A. & Di Martino, E. (2016) Bryozoan diversity in the Mediterranean Sea: An update. Mediterranean Marine Science, 17, 567 - 607. https: // doi. org / 10.12681 / mms. 1706"]}
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