Rhamphostomella pacifica

• 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 pacifica; Kamchatka; Kamchatka Peninsula
• Online Access: https://doi.org/10.5281/zenodo.6520683; http://treatment.plazi.org/id/038923740B28331FFF73ACA61C14FB9D

Rhamphostomella pacifica (O’Donoghue, 1925) (Figs 8, 30E) Porella pacifica O’Donoghue, 1925, p. 20, pl. 2, figs 7, 8. Rhamphostomella n. sp. 2: Hirose 2010, p. 92, pl. 156a–d. Material examined. Neotype : ZIRAS 1 /50124, one colony fragment, KIENM Collection, RV Nazarovsk , Stn 238, 11 June 1988, Kronotsky Gulf, eastern Kamchatka Peninsula, Pacific Ocean, 54°53.0ʹ N, 162°15.0ʹ E, depth 122 m, rock dredge, collector A. V. Rzhavsky. NHMUK 2010.2.9.4, one colony fragment, KIENM Collection, RV Nazarovsk , Stn 119, 24 May 1988, Avacha Gulf, eastern Kamchatka Peninsula, Pacific Ocean, 52°54.0ʹ N, 160°01.0ʹ E, depth 141 m, rock dredge, gravel, collector A. V. Rzhavsky. NHMUK 2010.2.9.7, one colony fragment, KIENM Collection, RV Nazarovsk , Stn 170, 9 May 1988, Avacha Gulf, eastern Kamchatka Peninsula, Pacific Ocean, 53°22.0ʹ N, 160°07.0ʹ E, depth 136 m, rock dredge, collector A. V. Rzhavsky. Additional material. 30 specimens. KIENM Collection (1988) Stn 114; IMB Collection (2011) Stns 3/1, 16/12, 18/14, 20/16, 24/19, 42/37, 43/38, 48/42, 60/50 (see Appendix 1 for details). Measurements. ZIRAS 1/50124, Kronotsky Gulf, eastern Kamchatka, Pacific Ocean (Figs 8A–M, 30E). ZL, 0.82–1.57 (1.14 ± 0.19). ZW, 0.42–0.75 (0.59 ± 0.10). ZD, 0.52–0.83 ( n = 2). OrL, 0.17–0.22 (0.19 ± 0.01). OrW, 0.20–0.27 (0.24 ± 0.02). OeL, 0.32–0.43 (0.39 ± 0.03). OeW, 0.45–0.58 (0.51 ± 0.03). Av(s)L, 0.07–0.12 (0.10 ± 0.02). Av(ad)L, 0.20–0.90 (0.53 ± 0.18). Av(vic)L, 0.55–0.62 ( n = 2). P(m)N, 13–21 (17). P(oe)N, 9–15 (12). Description. Colonies initially encrusting,multiserial, unilaminar (Fig.8A),giving rise to extensive, meandering, erect bilamellar expansions attaining 41 × 38 mm in size. Dry colonies pink to light yellow. Bilaminate parts of colony up to 1.55 mm thick, adjoining layers not fully adherent, sometimes with narrow slit-like spaces in between (Fig. 8M). Directions of growth of zooids in adjoining layers not wholly coinciding, with angles of up to 10° between main axes of opposing layers. Zooids large, elongate-hexagonal to oval, ...