Seguenzia giovia Dall, 1919

Seguenzia giovia Dall, 1919 View in CoL

( Figure 2 View FIGURE 2 E–F)

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

Seguenzia quinni McLean, 1985: 337 View in CoL , fig. 2. Holotype LACM 2065 About LACM . 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.