Phelliactis robusta Carlgren 1928
Phelliactis robusta Carlgren, 1928 (Fig. 2C, 6D, Table 5) Phelliactis robusta Carlgren 1928; 1942; Riemann-Zürneck 1973; Doumenc, 1975; Fautin et al. 2005. Material examined. MNRJ 9093 (one specimen), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT 82-2 (04° 33.1742’S,...
| Main Authors: | , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://zenodo.org/record/3803404 https://doi.org/10.5281/zenodo.3803404 |
| Summary: | Phelliactis robusta Carlgren, 1928 (Fig. 2C, 6D, Table 5) Phelliactis robusta Carlgren 1928; 1942; Riemann-Zürneck 1973; Doumenc, 1975; Fautin et al. 2005. Material examined. MNRJ 9093 (one specimen), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT 82-2 (04° 33.1742’S, 036° 15.0847’W), May 20, 2011, 2030–2074 m. MOUFPE-CNI 867 (one specimen), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT 82-2 (04° 33.1742’S, 036° 15.0847’W), May 20, 2011, 2030–2074 m. LC 152 (three specimens), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT 82-2 (04° 33.1742’S, 036° 15.0847’W), May 20, 2011, 2030–2074 m. Description. Large sea anemones, with specimens reaching 111.6 mm high and 33.7 to 59.4 mm wide. Pedal disc well developed, wrapping rocks or glass sponge threads (Fig. 6D). Column very thick, divided into scapus and scapulus. Scapus provided with very thick, polyhedric, sometimes flat tubercles, that form well-marked furrows where the thin cuticle can be seen. Scapulus strongly tuberculated, with tubercles irregularly arranged and decreasing in size towards the oral disc. No cinclides. Oral disc large, bilobed and asymmetrical. Tentacles large and threadlike, with mesogleal thickenings at the base, measuring approximately 11 mm in length. Tentacles nearly 130 in number, arranged in five marginal cycles. Two siphonoglyphs, each attached to a pair of directive mesenteries. Mesenteries hexamerously arranged in five cycles (6+6+12+24+48), more numerous at the base, where they are approximately 150 in number. First cycle perfect and sterile, other cycles imperfect. Gametogenic tissue from the second to fourth cycle of mesenteries. Marginal sphincter mesogleal, alveolar, positioned near the endodermal side. Retractor muscles weak and diffuse. Longitudinal musculature of tentacles ectodermal. Parietobasilar muscles poorly developed. Acontia present. Cnidom. Spirocysts, Basitrichs, Microbasic p -mastigophores (Table 5). Remarks. The specimens in ... |
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