Boreancistrolepis excelsus Mclean & Clark 2023, n. sp.

• Main Authors: Mclean, James H., Clark, Roger N.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Neogastropoda; Colidae; Boreancistrolepis; Boreancistrolepis excelsus; Agattu; Attu; Alaska; Aleutian Islands
• Online Access: https://doi.org/10.5281/zenodo.8391549

Boreancistrolepis excelsus n. sp. Figures 5 B–F urn:lsid:zoobank.org:act: D0FD5604-C34D-48A4-BA7D-C350D464604F Type locality: S of Attu, Island, Near Islands, Aleutian Islands, Alaska (52°13.5 N, 173°27.8 E), 169 m, (NMFS 23-1997 - 01-229) ( leg. RNC, 6 August, 1997, trawled, R/V Dominator ). Type material: Holotype, LACM 3570, 69.0 mm ( leg. RNC, 6August, 1997; trawled, R/V Dominator ); Paratypes: Pt 1, LACM 3608 (type locality), 74.4 mm; Pt 2, LACM 3609, 58.1 mm. Tanadak Pass, E of Segula Island, Rat Ids. (52°03.45 N, 178°18.94), 407 m; Pt 3, USNM 1606663, 68.38 mm. E of Kruloi Point, Agattu Island, Near Ids. (52°27.91 N, 174°13.71 E), 118 m, (NMFS 94-2002 - 01-161); Pt 4, SBMNH 46499, 64.11 mm. S of Amutka Island (52°29.46 N, 171°06.96 W), 281 m, (NMFS 176-2014 - 01-40); Pt 5, SBMNH 169000, 64.4 mm. S of Little Sitkin Island, Rat Ids. (51°52.56 N, 178°34.01 E), 407 m, (NMFS 94-2002 - 01-154); Pt 6, CASIZ 236199, 48.64 mm. Samalga Pass (52°56.1 N, 169°20.38 W), 399 m, (NMFS 143- 2004-01-23); Pt 7, RNC 4700 (type locality) 65.17 mm. Referred material: CASIZ 149895, 1 sp., 30.38 mm, S of Islands of Four Mountains (52°20.45 N, 170°40.08 W), 224 m, (NMFS 94-200001 - 48); RNC 4522 (type locality), 3 sp., 28.19–80.78 mm; RNC 4623, 1 sp., 69.38 mm. S of Unalaska Island (53°12.0 N, 166°49.82 W), 209 m, (134- 2003-01-17); Koen Fraussen Coll., 1 sp., 67.97 mm. S of Yunaska Island (52°29.68 N, 170°41.19 W), 226 m, (NMFS 23-1997 - 01-48); RNC 4690, 1 sp., 26.86 mm. S of Seguam Island (52°03.51 N, 172°33.12 W), 145 m, (NMFS 23-2000 - 01-72); RNC 4917, 2 sp., 68.27 & 39.19 mm S of Islands of four Mountains (52°13.7 N, 169°44.7 W), 329 m, (NMFS 143-2010 - 01-72). Description: Shell relatively large (largest examined 80.7 mm, RNC 4522), profile tall, moderately slender, whorls six (figs. 5 B–D); shell white, periostracum glossy, thin, adherent, olive green, with slightly lighter zone on the basal region, shiny, not flaking in dry shells; Protoconch one whorl; whorls rounded; irregular, sculpture of oblique, spiral cords ...