Castaneobuccinum clinopsis Mclean & Clark 2023, n. sp.

• Main Authors: Mclean, James H., Clark, Roger N.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2023
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Neogastropoda; Buccinidae; Castaneobuccinum; Castaneobuccinum clinopsis; Agattu; Alaska
• Online Access: https://zenodo.org/record/8399653; https://doi.org/10.5281/zenodo.8399653

Castaneobuccinum clinopsis n. sp. Figures 21. G–I urn:lsid:zoobank.org:act: A2CDD97A-BDB8-4C45-A7EA-F2D4C495429B Type locality: SE of Agattu Island, Near Ids., Aleutian Is., Alaska (51°52.0 N, 174°55.6 E), 157 m. (NMFS 143- 200401 - 86). Type material: Holotype, LACM 3592. R/ V Sea Storm (leg. R. N. Clark, 29 June, 2004); Height 79.3 mm; Paratypes: Pt 1, SBMNH 169018, 81.2 mm. Petrel Bank, Rat Ids. (52°09.58 N, 179°42.62 E), 92–94 m. (94-199401- 153); Pt 2, SBMNH 169019, 89.3 mm. Adak Island, Kagalaska Strait, Andreanof Ids. (51°45.35 N, 176°25.43 W), 11m. (AKALE07-A0021); Pt 3 & 4, RNC 4624, 73.4 & 83.7 mm. Lucky Point, Kuluk Bay, Adak Island, Andreanof Ids. (51°51.9 N, 176°35.36 W), 13 m. Referred material: 6, RNC 4693, 18.2 –86.0 mm. Adak Island, Kagalaska Strait, Andreanof Ids. (51°46.5 N, 176°25.43 W), 12–15 m; 1, RNC 4567, 57.3 mm. S of Atka Island, Andreanof Ids. (51°52.4 N, 174°31.9 W), 146 m. Description: Shell relatively large (to 90 mm), sturdy, tall spired; chestnut brown to cream; protoconch with 2 whorls teleconch with 6–7 whorls, suture moderately impressed; axial sculpture lacking or represented by 16–20+ low, folds on shoulder; spiral sculpture of narrow, well-defined shoulder cord, and one lesser subsutural cord; surface smooth or with finely incised spiral striations of slightly irregular spacing. Aperture large, oval, more than 1/3 of shell height; lip inflated, forming broad shallow sinus on upper part of whorl; lip edge massively reinforced. Radula: typical for genus, rachidian tooth with 5 sub-equal cusps, the outer two slightly thicker and set back somewhat from the medial three; Lateral teeth large, tricuspid, outer cusp very large, strongly curved; central cusp much smaller, curved, separated from inner cusp by a deep notch; inner cusp shorter and broader than outer cusp, about twice as long and three times as broad as central cusp. Remarks: This may prove to be two similar but distinct species. Specimens from the Near Islands (type locality) tend to be thinner shelled and have ...