Rhamphostomella echinata 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 echinata; Bering Sea; Aleutian Islands
• Online Access: https://doi.org/10.5281/zenodo.7628999; http://treatment.plazi.org/id/038923740B7A336DFF73A84C1DE7FAC5

Rhamphostomella echinata n. sp. (Fig. 24) Rhamphostomella sp.: Grischenko 1997, p. 176; 2002, p. 115. Diagnosis. Colony encrusting, multiserial. Zooids small, hexagonal. Frontal shield moderately convex, uniformly tessellated, with a few marginal areolae. No interareolar ridges. Umbonuloid component small. Suboral mucro absent. Primary orifice irregularly oval to quadrangular; proximal margin bisinuate, with median bifurcated to multiply branched lyrula and small, lateral, triangular processes. Condyles absent. Secondary orifice irregularly oval, cormidial, just slightly above primary orifice. 2‒3 pairs of very long tubular, articulated oral spines with massive bases on lateral margins of secondary orifice, conferring spinose appearance to colony. Suboral avicularian cystid very small, with finely dimpled surface. Rostrum short, oval, slightly elevated. Mandible spatulate, with rounded distal end. Crossbar incomplete. No adventitious avicularia. Ovicell hyperstomial. Ectooecium with small scattered pseudopores, no secondary calcification. 2–3 pore chambers in distolateral wall, and 1–2 multiporous septula in transverse walls. Basal surface of zooids fully calcified, with tubular protuberances. Material examined. Holotype : ZIRAS 1 /50126, one colony fragment, IMB Collection, Stn 158/393, 18 September 1973, Kitolovnaya Bank, Medny Island, coastal waters of Medny Island, Commander Islands, Bering Sea, 55°02.2ʹ N, 167°10.9ʹ E, depth 60 m, rock dredge, collector S.D. Vavilin. Paratype : NHMUK 2013.10.21.3, one colony encrusting oyster shell, RV Norseman , Stn LT –2, 3 July 2011, Longshot, East of Square Bay, coastal waters of Amchitka Island, Rat Islands, western Aleutian Islands, Bering Sea, 51°26.6ʹ N, 179°12.2ʹ E, depth 10 m, SCUBA, collector P. Kuklinski. NHMUK 2013.10.21.4, one colony, RV Norseman , Stn LT –1, 4 July 2011, Longshot, South of Crown Reefer Point, coastal waters of Amchitka Island, Rat Islands, western Aleutian Islands, Bering Sea, 51°27.3ʹ N, 179°11.4ʹ E, depth 13 m, SCUBA, collector P. ...