Reophax fusiformis (Williamson, 1858)

Lee, Sue Yeon, Yoo, Jung Sun & Kim, Seung Tae, 2017, Thirty new records of marine benthic Foraminifera from Korean waters, Journal of Species Research 6, pp. 75-93 : 80

5. Reophax fusiformis (Williamson, 1858)

( Plate 1. 5 a-b)

Proteonina fusiformis Williamson, 1858, p. 1 , pl. 1, fig. 1 (cited from, Höglund, 1947); Cushman, 1910, p. 41, fig. 39; Höglund, 1947, p. 52, pl. 4, fig. 21, p. 56, figs. 20-21.

Reophax fusiformis (Williamson, 1858) : Jones, 1994, p. 37, pl. 30, figs. 7-10; Yassini & Jones, 1995, p. 67, fig. 17; Debenay, 2013, pp. 90, 255.

Material examined. Korea: Yellow Sea , station 30905 (35°51 ʹ 3.89 ʺ N, 125°24 ʹ 32.39 ʺ E), 8 Apr 2015, by Van Veen Grab, collected by Sangjin Kim. NIBR ID: NIBR PR0000107222 .

Diagnosis. Test fusiform, tapering toward both ends, and multichambered. Chambers rounded to pyriform. Wall agglutinated with heterogeneous sediment grains. Aperture terminal and circular produced on a short neck.

Remarks. According to Ellis & Messina Catalogue of Foraminifera (1940), this species was originally classified as Proteonina fusiformis Williamson, 1858 , and later Loeblich & Tappan transferred it to R. fusiformis in 1955 ( Ellis & Messina, 1940). This species can be misidentified with the genus Lagenammina Rhumbler, 1911 because of its variable chamber compartment. However, the genus Reophax is multichambered, whereas Lagenammina is unilocular.

Distribution. Korea, China, Japan, New Caledonia, New Zealand, United States, Canada, Gulf of Mexico, Gulf of Saint Lawrence, North Atlantic Ocean, Norway, English Channel, Irish Sea and St. George’s Channel, Bay of Biscay ( France), Celtic Sea, Mediterranean Sea.