Tractolira delli Leal & Harasewych, 2005, new species

• Main Authors: Leal, José H., Harasewych, M. G.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2005
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Neogastropoda; Volutidae; Tractolira; Tractolira delli; Antarc*; Antarctica; Balleny Islands; Marie Byrd Land; Ross Sea; Ruppert coast; Scott Island; Sturge Island; Victoria Land
• Online Access: https://doi.org/10.5281/zenodo.6266194; http://treatment.plazi.org/id/8C0F87EEFFCF5E166C77E67AFE0BFCF0

Tractolira delli new species (Figures 1, 2, 5, 7, 10) Tractolira sp., Dell 1990: 217, fig. 372. Holotype: USNM 860631, USNS ELTANIN cruise 27, station 1939, 0 1 Feb. 1967, live collected specimen (Figures 1, 7). Measurements: 51.6 mm length, 20.2 mm width (the spire is broken, approximately 2 teleoconch whorls are missing; estimated length is 57.8 mm). Paratypes: Paratype 1, USNM 860632, off Victoria Land, Antarctica, 72º58'– 72º57' S, 174º24'– 174º25' E, USNS ELTANIN cruise 32, sta. 1999, 1772– 1775 m, 5' Blake trawl, 11 Jan. 1968 (Figures 2, 5); paratype 2, USNM 860633, off Ruppert Coast, Marie Byrd Land, Antarctica, 59º48'– 59º51' S, 144º45'– 144º49' W, USNS ELTANIN cruise 20, sta. 134, 3200–3259 m, 5' Blake trawl, 0 3 Oct. 1965; paratype 3, USNM 860634, Scott Island Bank, off Victoria Land, Antarctica, 69º03'– 69º05' S, 179º41'– 179º22' E, USNS ELTANIN cruise 27, sta. 1939, 3519–3596 m, 10' Blake trawl, 0 1 Feb. 1967 (type locality; live collected specimen); paratype 4, USNM 860635, off Victoria Land, Antarctica, 72º27'– 72º26' S, 177º04'– 177º12' E, USNS ELTANIN cruise 32, sta. 2121, 1883– 1890 m, 10' Blake trawl, 12 Feb. 1968. Other Records: USNM 886106, off Sturge Island, Balleny Islands, off Victoria Land, Antarctica, 66º52'– 66º49' S, 164º32'– 164º26' E, USNS ELTANIN sta. 1949, 2507– 2525 m, 10' Blake trawl, 0 5 Feb. 1967 (material examined by Dell [1990]. Type Locality (Figure 10): Scott Island Bank, eastern Ross Sea, Antarctica, 69º03'– 69º05' S, 179º41'– 179º22' E, 3519–3596 m. Description: Shell to 57 mm length and 20 mm width, thin, elongate, fusiform. Spire elevated, aperture length/spire length about 1.3. Spire angle about 30º. Surface eroded where not covered by periostracum. Protoconch conical, broken or eroded on most specimens. Teleoconch with up to 5.5 moderately convex whorls. Suture impressed. Axial sculpture of fine raised threads. Spiral sculpture of raised threads, 32–38 on penultimate whorl, 65 on body whorl. Intersection of axial and spiral elements gives finely and smoothly ...