Crucigera irregularis Bush 1905

• Main Author: Bastida-Zavala, J. Rolando
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2008
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Sabellida; Serpulidae; Crucigera; Crucigera irregularis; Bering Sea; Alaska; walrus*
• Online Access: https://doi.org/10.5281/zenodo.5107681; http://treatment.plazi.org/id/7B4F87BD9519FFE5FF1F5DDBFECE7B89

Crucigera irregularis Bush, 1905 (Figures 4A–B) Crucigera irregularis Bush, 1905: 234, pl. 25, fig. 5; pl. 29, fig. 4; pl. 33, fig. 13; pl. 39, figs. 1–5. Type locality: Juneau, Alaska. Crucigera irregularis .— ten Hove and Jansen-Jacobs, 1984: 170–176, figs. 3b, 4f–g, 5c, 8e–f, 9k–o, 10b, 11j–o, 12 (revision of the genus). Material examined. Five specimens: Alaska (USA), LACM-AHF N2127 (approx. 57º10’N, 169º40’W, Bering Sea, 20 km east of Walrus Island, Pribilof Islands, Alaska King Crab Investigation, sta. D11.41, 57–60 m); LACM-AHF N2789 (approx. 55º55’N, 161º27’W, Canoe Bay, from crab trap, Sept. 23, 1940, coll. N.L. Schmitt); LACM-AHF N10728 –10729, 3 spec. (sta. 72A D2, no more data). Diagnosis. Tube smooth, thick-walled, lacks longitudinal ridges, peristomes or alveoli. Opercular peduncle smooth, white. Base of operculum with rounded dorsal process. Operculum one irregular funnel, with apex displaced to ventral side; funnel with 21–47 radii with rounded tips (Figs 4A–B). Collar with bayonet chaetae, with 2–3 blunt-short teeth and minute accessory teeth, distal blade smooth. Habitat. Depth: 57–60 m; ten Hove and Jansen-Jacobs (1984) recorded it down to 274 m. Cold waters. Distribution. North-eastern Pacific. Alaska to Oregon, USA (ten Hove & Jansen-Jacobs 1984). Remarks. Crucigera irregularis and C. zygophora are sympatric species (ten Hove & Jansen-Jacobs 1984); even, the tube of one specimen of C. irregularis (LACM-AHF N2789) is attached over the tube of C. zygophora . Published as part of Bastida-Zavala, J. Rolando, 2008, Serpulids (Annelida: Polychaeta) from the Eastern Pacific, including a brief mention of Hawaiian serpulids, pp. 1-61 in Zootaxa 1722 on page 16