Paraphelliactis labiata De Melo & Targino & Gomes 2020, n. sp.
Paraphelliactis labiata n. sp. (Figs. 2A, 3–5, Tables 1–3) urn:lsid:zoobank.org:act: 72B664B0-6E14-4610-99FF-42374AD8B8F1 Material examined. Holotype: MNRJ 9095 (one specimen), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT84 (04° 25.8308’ S, 036° 37.3678’ W), May 6, 2...
| Main Authors: | , , |
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| Format: | Other/Unknown Material |
| Language: | unknown |
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2020
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| Subjects: | |
| Online Access: | https://zenodo.org/record/3803410 https://doi.org/10.5281/zenodo.3803410 |
| Summary: | Paraphelliactis labiata n. sp. (Figs. 2A, 3–5, Tables 1–3) urn:lsid:zoobank.org:act: 72B664B0-6E14-4610-99FF-42374AD8B8F1 Material examined. Holotype: MNRJ 9095 (one specimen), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT84 (04° 25.8308’ S, 036° 37.3678’ W), May 6, 2011, 1964-2045m. Paratypes: MOUFPE- CNI 868 (one specimen), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT 85 (04° 21.3580’S, 036° 44.2730’W), May 4, 2011, 2025–2057m. LC 141 (one specimen), South Atlantic Ocean, Potiguar Basin, Rio Grande do Norte, Brazil, station MT 85 (04° 21.3580’S, 036° 44.2730’W), May 4, 2011, 2025–2057m Description. External morphology (Figs. 2A, 3). Column 11 mm to 84 mm in height and 12 mm to 99 mm in width (Figs. 2A, 3 A–B). Body cylindrical, wider than tall. Color a pure white in most of the column, abruptly changing to pale pink towards the aboral side. Base spreads beyond a tapered end but never exceeds the maximum diameter of the animal, hence the body takes a very singular cup shape no matter its size. Column divisible into a strongly tuberculated scapus and a short, smooth scapulus, without cinclides. Tubercles of the scapus conical, pointed, some with very flat with tips withdrawn and longitudinal grooves, not ordered in rows (Fig. 3 A–B). Tubercles are larger at midcolumn and towards the upper scapus, although smaller tubercles are also present near the limbus and at the scapus-scapulus boundary (Fig. 3C). A yellowish cuticle visible between the tubercles in some places. Scapulus thin and concealed due to the retraction of the oral disc. Endocoelic and exocoelic spaces visible as rays running from scapulus to mouth. Oral disc bilobed and broad, with a central oval mouth; mouth remains wide open. Lobes of oral disc unequal in size, usually overlapping (Fig. 3B). Tentacles slender, short, about 140 in number, without basal mesogleal thickenings, arranged in five peripheral cycles hidden inside the terminal fold of the scapus. Those of the inner cycles ... |
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