Castaneobuccinum pagodaformis Mclean & Clark 2023
- Dataset
- Seven new genera and thirty-four new species of buccinoid gastropods (Neogastropoda: Buccinidae) from the Aleutian Islands, Alaska
- Rank
- SPECIES
- Published in
- Mclean, James H., Clark, Roger N. (2023): Seven new genera and thirty-four new species of buccinoid gastropods (Neogastropoda: Buccinidae) from the Aleutian Islands, Alaska. Zootaxa 5351 (2): 151-201, DOI: 10.11646/zootaxa.5351.2.1, URL: http://dx.doi.org/10.11646/zootaxa.5351.2.1
Classification
- kingdom
- Animalia
- phylum
- Mollusca
- class
- Gastropoda
- order
- Neogastropoda
- family
- Buccinidae
- genus
- Castaneobuccinum
- species
- Castaneobuccinum pagodaformis
description
Description: Shell relatively large for genus (to 80 mm, RNC 4231), tall spired, strongly keeled; dark brown with lighter tone on spiral cords. Protoconch with two whorls; teleconch with six to seven whorls. Axial sculpture lacking. Spiral sculpture dominated by one strongly projecting shoulder cord beginning as a sharp carination on the first teleconch whorl, becoming T-shaped in cross-section on adult whorls; shoulder ramp convex. A second cord of lesser strength just above the suture; base with one weaker cord; entire surface with incised spiral striae. Aperture large, oval, about 1 / 3 of shell height; outer lip massively thickened, with indentation reflecting the cords, and broad, shallow sinus on shoulder; canal very short, narrow. Radula: Typical for genus, rachidian tooth sub-rectangular, posterior edge strongly indented; bearing five uniform, well-spaced cusps. Lateral teeth large tri-cuspid, Outer cusp long, slender, curved; middle cusp about half the length of the outer one, slender; inner cusp about 2 / 3 as long as outer one, very broad, curved.
description
urn: lsid: zoobank. org: act: 33993961 - 8 A 73 - 429 B- 8992 - 3 D 8 BB 5 DA 8 AB 0
discussion
Remarks: This species shows strong similarities with Casteobuccinum triplostephanum (Dall, 1919), but differs in the much stronger ribs, the primary one (and sometimes the sutural one) of which is T-shaped in section, as well as in the details of the radular teeth.
distribution
Distribution: Central and western Aleutians, Seguam Pass, SE of Seguam Id. (170 ° 30 W) to S of Agattu Id., Near Ids. (173 ° 30 E). 72 – 469 m. Habitat: Sand, gravel and cobble bottoms with a bottom temperature of 3.7 – 3.8 ° C.
etymology
Etymology: Named for its pagoda-like form.
materials_examined
Type locality: Amutka Pass, Aleutian Ids., Alaska (52 ° 29.4 N, 171 °), 469 m. (23 - 200001 - 52). Type material: Holotype, LACM 3593, 64.0 mm. (leg. K. Maslenikov, 31 May, 2000) Paratypes: Pt 1, LACM 3662, 37.5 mm (type locality); Pt 2, SBMNH 183015, 54.5 mm. (type locality); Pt 3, LACM 3661, 50.4 mm. S of Agattu Island, Near Ids. (52 ° 19.15 N, 173 ° 29.8 E), 93 m (RB 86 – 211); Pt 4, RNC 4231, 79.5 mm. Petrel Bank, Rat Ids. (52 ° 05.67 N, 179 ° 22.78 E), 312 m. (NMFS 94 - 200201 - 174). Referred material: 1, RNC 4671, S of Buldir Island (51 ° 57.82 N, 176 ° 01.82 E). (NMFS 147 - 200401 - 188) 72 m, 62.5 mm.