Oligomeria Galkin & Golikov, 1985,

Geiger, Daniel L., 2019, The Family Seguenziidae Verrill, 1884 in the Northeast Pacific, including a comment on excessive numbers of taxonomic data portals, Zoosymposia 13, pp. 61-69: 64

Oligomeria Galkin & Golikov, 1985  Edit

( Figure 1 E–F)

Oligomeria Galkin & Golikov, 1985: 22  Edit . Type species (OD): O. conoidea Galkin & Golikov, 1985  Edit . Kurile Islands, Russia.

Description. Shell trochiform biconical, predominant spiral sculpture, umbilicate. Monotypic genus.

Oligomeria conoidea Galkin & Golikov, 1985  Edit

( Figure 1 E–F)

Oligomeria conoidea Galkin & Golikov, 1985: 23  Edit , figs 1–3. Holotype ZIN 38605. Cape Kitov , Urip, Kurile Islands, Russia, 150 m.

Description. Shell to 4.7 mm, trochiform biconical; spiral cords or carinated cords, ~6 stronger ones on shoulder, ~15 weaker ones on base; faint axial sculpture predominantly on early whorls, umbilicus open, no periumbilical cord, no funiculus; columellar wall somewhat thickened, aperture subquadratic.

Distribution. Kurile Islands, Russia, to Aleutian Islands, Alaska (179˚W). 88– 220 m.

Remarks. The strength of the spiral sculpture varies, but is not sufficient to warrant taxonomic recognition, particularly giving the limited material available.

Figures

FIGURE 1. A–B. Carenzia golikovi Geiger, 2017. A. 5180 m, Abyssal plain W of Oregon, S of Gulf of Alaska, Alaska (approximately 45° N, 153.8° W) (LACM 3317, holotype), 5.3 mm. B. 5100 m, Aleutian Trench, Alaska [near western end of chain], (52° 12'N, 175° 44'E) (LACM 3318, paratype). C. Carenzia inermis Quinn, 1983. 2820 m, Cascadia Abyssal Plain, off Oregon (LACM 1806, holotype), 6.8 mm. D. Asthelys careyi Geiger, 2017. 5180 m, abyssal plain W of Oregon, S of Gulf of Alaska, Alaska (approximately 45° N, 153.8' W) (LACM 3320, holotype), 7.0 mm. E–F. Oligomeria conoidea Galkin & Golikov, 1985. E. 166 m, S of Attu Island, Aleutian Islands, Alaska (LACM 1997-163.7), 5.9 mm. F. 219 m, NE of Semisopochnoi Island, Aleutian Islands, Alaska (LACM Station 86-330), 4.7 mm.