Seguenzia giovia Dall, 1919

(Figure 2 E–F)

Seguenzia giovia Dall, 1919: 343–344 . Holotype USNM 209228. Off Santa Catalina Island, California Channel Islands, 190– 216 m [see remarks below].

Seguenzia quinni McLean, 1985: 337, fig. 2. Holotype LACM 2065. Tufts Abyssal Plain, W of Lincoln County, Oregon, 3900 m. New synonym.

Description. Shell to 7.5 mm, globular biconical; carinated spiral cords below suture, strongest on mid shoulder, from periphery to base approximately 10 of decreasing strength; fine spiral lines between cords; axial cordlets distinct; Umbilicus moderately wide, bordered by spiral carina, with funiculus; Columellar wall thickened, terminating as sharp spur. Flaring of lip variable depending on size, preservation of specimen.

Distribution. Off Oregon (45˚N) to Southern California (33˚N). 800–3900 m.

Remarks. Seguenzia quinni is a larger, better-preserved specimen of S. giovia; note the identical teleoconch sculpture and umbilical details. The type locality of S. giovia (Albatross 4408) is most likely erroneous because it is too shallow for seguenziids, and may be any of the Albatross 4400–4407 stations at depths of 450–650 fathoms (820–1190 m), all off Santa Catalina Island, Los Angeles County, California.