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

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...

Full description

Bibliographic Details
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: 2022
Subjects:
Biodiversity
Taxonomy
Animalia
Bryozoa
Gymnolaemata
Cheilostomatida
Umbonulidae
Rhamphostomella
Rhamphostomella echinata
Bering Sea
Amchitka
Amchitka Island
Rat Islands
Crown Reefer Point
Square Bay
Aleutian Islands
Online Access:https://zenodo.org/record/7628999
https://doi.org/10.5281/zenodo.7628999
Description
Summary: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. Kuklinski. ...

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