Rhamphostomella morozovi Grischenko & Gordon & Taylor & Kuklinski & Denisenko & Spencer-Jones & Ostrovsky 2022, n. sp.

• Main Authors: Grischenko, Andrei V., Gordon, Dennis P., Taylor, Paul D., Kuklinski, Piotr, Denisenko, Nina V., Spencer-Jones, Mary E., Ostrovsky, Andrew N.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Bryozoa; Gymnolaemata; Cheilostomatida; Umbonulidae; Rhamphostomella; Rhamphostomella morozovi; Kamchatka
• Online Access: https://doi.org/10.5281/zenodo.6520681; http://treatment.plazi.org/id/038923740B2B3322FF73AB1A1DFCFC11

Rhamphostomella morozovi n. sp. (Fig. 7) Diagnosis. Colonies initially encrusting, multiserial, unilaminar, rapidly rising into bilamellar, fan-like expansions. Zooids very large, hexagonal.Frontal shield relatively flat, finely granulated. Marginal areolae initially large, reduced in size with age. Interareolar ridges short, not reaching cystid of suboral avicularium. Umbonuloid component medium-sized. Primary orifice wider than long, broadly semicircular, with small lateral condyles; proximal margin straight or with low median prominence. Oral spines lacking. Secondary orifice irregularly quadrangular to semicircular, cormidial, with lateral peristomial lappets in ovicellate zooids. Suboral avicularian cystid large, subconical, occupying one-third to half of frontal shield, less prominent in older zooids; frontal surface across zooidal axis, facing distolaterally. Rostrum broadly triangular or semielliptical, with blunt hooked tip. Crossbar complete. Adventitious avicularia small, central to proximal, facing frontalwards to slightly angled. Rostrum and palate broadly triangular to semielliptical, with a blunt hooked tip. Crossbar complete. Ovicells hyperstomial, rapidly subimmersed by secondary calcification. Ectooecium with few radially arranged slit-like proximal pseudopores. 1–3 pore chambers in distolateral wall and two multiporous septula in transverse walls. Basal surface of zooids fully calcified, with small prominences. Material examined. Holotype : ZIRAS 1 /50570, one colony fragment, KamchatNIRO Collection, RV Professor Probatov , Stn 62, 16 August 2013, coastal waters of western Kamchatka, Sea of Okhotsk, 57°14.9ʹ N, 155°37.7ʹ E, depth 116 m, bottom-grab “Ocean–50”, collector T. B. Morozov. Paratype : ZIRAS 2 /50571, two fragments from same colony, KamchatNIRO Collection, RV Professor Probatov , Stn 82, 11 August 2013, coastal waters of western Kamchatka, Sea of Okhotsk, 58°09.0ʹ N, 156°03.0ʹ E, depth 146 m, bottom-grab “Ocean–50”, collector T. B. Morozov. Etymology. The specific name honours Mr ...