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 Buccinum katharinae n. sp. Figures 22 J–K urn:lsid:zoobank.org:act: 5A5BB458-A058-4D3E-AE28-42E6FB466638 Type locality: Amutka Pass , SE of Seguam Island , Aleutian Is. , Alaska ( 52°22.5 N , 171°20.26 W ) ( NMFS 23-2000 - 1-83 ), 325 m . Type material: Holotype , LACM 3595 , 29.2 mm ; Paratype , Pt 1, RNC 5061 , 34.8 mm . N of Carlisle Island , Islands of four Mountains ( 53°04.73 N , 170°08.43 W ), 177 m . ( NMFS 148-2022 - 1-32 ) . Description: Shell relatively small (to 35 mm , RNC 5061) whorls rounded, suture moderately impressed; shell brown with lamellar, brown periostracum; protoconch with 1.5 whorl, 4.5 teleconch whorls. Axial sculpture lacking, spiral sculpture of two strongly projecting spiral cords on spire; interspaces of equal width, deeply channeled, surfaces of cords and interspaces with microscopic, raised lirae; base with three additional cords of lesser strength, suture laid on uppermost of these. Lip of holotype thin, immature; lip; paratype specimen with a complete, but lip, which is scarcely if at all thickened. Operculum small, filling about 25 % of aperture. Rachidian tooth rectangular, with four short, weak cusps; Lateral teeth tri-cuspid, Outer cusp very long, curved; widely spaced from central and inner cusps; central cusp very small, less than half as long and broad as inner cusp; inner cusp about half as long as outer one, slightly curved. Remarks: For many years this unique species was known only from the holotype , but during the review process a second specimen was recovered. Buccinum katharinae is similar to Buccinum eugrammatum Dall, 1907 , but differs in 1) the fewer spiral cords, two on spire, and five total compared with five on spire and eight total in B. eugrammatum , and 2) lack of periostracum in B. eugrammatum . Etymology: Named for Katharine Pearson Maslenikov, taxonomist, at the University of Washington , who collected the holotype . Distribution: Central Aleutian Islands, Amutka Pass ( 171°20 W ), to the Islands of four Mountains ( 170° W ), at depths of 177– 325 m . Habitat: Volcanic sand and mud bottoms.