Seven new genera and thirty-four new species of buccinoid gastropods (Neogastropoda: Buccinidae) from the Aleutian Islands, Alaska Author Mclean, James H. Author Clark, Roger N. text Zootaxa 2023 2023-09-26 5351 2 151 201 http://dx.doi.org/10.11646/zootaxa.5351.2.1 journal article 270509 10.11646/zootaxa.5351.2.1 b3b05d51-3aeb-49c7-bbc1-0365bc92c886 1175-5326 8391375 F34F6B3C-F251-4D8E-B002-A96BD70CA1BE Beringius aurulentus n. sp. Figure 12 A–D urn:lsid:zoobank.org:act: 52353F2F-07C7-43FB-9344-14A0E1718D58 Type locality: Tahoma Bank , W of Buldir Island , Aleutian Is. , Alaska ( 52°26.12 N , 175°40.99 E ), 147 m . ( NMFS 94-200201 - 167 ) . Type material: Holotype , LACM 3577, 117 mm . ( leg. RNC , 9 July , 2002, trawled, R/ V Vesteraalen ) ; Paratypes : Pt 1, SBMNH 464996 , 92.4 mm ; Pt 2, USNM 1606661, 105.4 mm . W of Uliaga Island , Islands of Four Mountains ( 53°07.07 N , 169°52.12 W ), 321 m . ( NMFS 57-200201 - 38 ); Pt 3, CASIZ 236198 , 99.5 mm . SE of Yunaska Island , Islands of Four Mountains ( 52°44.8 N , 170°39.3 W ), 87 m ( NMFS 143-201001 - 78 ); Pt 4, RNC 4701 , 88.6 mm . (type locality) . FIGURE 11. A–D . Beringius stanchfieldi n. sp. ; A . Holotype, LACM 3575, W of Carlisle Island, 222 m, 104.8 mm; B . Paratype 1, RNC 4921, Islands of Four Mountains, 200 m, 113.7 mm; C. RNC 4921, close-up of sculpture; D . Radula, Holotype, bar = 200 µm; E–I . Beringius frausseni n. sp. ; E . Holotype, ZIN 62061, Sumushu Island, 120 m, 136.0 mm; F . Paratype 1, RBCM 979-01070, Kamchatka, 280 m, 124.2 mm; G . Paratype 2, RNC 4915, 109.7 mm. “Aleutian Islands” (Stalemate Bank?), 140 m; H . Paratype 2, close-up of sculpture; I . Radula, holotype, bar = 200 µm. Description: Shell moderately large (to 117 mm , Holotype ), slender, nearly fusiform, suture impressed; white to pale tan; periostracum golden-tan. Protoconch with 2.5 whorls, with spiral and oblique cords forming diamond-like lattice; teleconch with 4.5–5 whorls. Axial ribs faint or lacking, but bearing very numerous, fine, close-set, raised axial threads. Spiral sculpture (when present), consists of a few barely detectable cords (on old, thick specimens, i.e. , paratype three). Aperture short, much less than half of shell height, canal short, broad. Radula ( Fig. 12D ): Rachidian tooth broader than long, lateral edges rounded, anterior and posterior edges slightly indented. Lateral teeth large, tricuspid; outer cusp thick, tapering, strongly curved, or distal half, and often bearing a small protrusion near the base on the inside, forming a notch between it and the central cusp; central cusp many times smaller than outer one, and slightly curved outward; inner denticle about twice as large as central one, broad, strongly curved inward. Remarks: This species resembles Beringius incisus (Dall, 1907) (figs. 9D–G) [herein recognized as distinct from the variable Beringius kennicottii (Dall, 1871) (figs. 8A–G) on account of its fine, regular, spiral threads], but is distinguished by 1) the lamellar periostracum, and 2) the fine axial threads on the whorls as opposed to spiral threads only in Beringius incisus . Etymology: Latin, aurulentus , “golden, or made of gold”, in reference to the color of the periostracum. Distribution: Central Aleutian Islands, from Kagamil Pass, Islands of Four Mountains ( 169°50’ W ) to Tahoma Reef, W of Buldir Island ( 175°40’ E ), at depths of 147– 321 m . Habitat: Broken hydrocoral/sponge, and gravel bottoms, with a bottom temperature of 4–4.4°C.