Uvigerina schwageri Brady, 1884

Lee, Somin Lee and Wonchoel, 2020, Five newly recorded foraminifera from off the southern coast of Jeju Island, Korea, Journal of Species Research 9 (4), pp. 473-479 : 477

4. Uvigerina schwageri Brady, 1884

( Plate 1 , fig. 4a -b)

Uvigerina schwageri Brady, 1884, p. 575 , pl. 74, figs. 8-10; Cushman, 1913, p. 97, pl. 37, figs. 3-4; 1921, p. 270, pl. 56, figs. 3-5; Hatta and Ujiié, 1992, p. 176, pl. 2, fig. 7; Jones, 1994, p. 85, pl. 74, figs. 8-10; Szarek, 2001, p. 131, pl. 18, figs. 14-17.

Euuvigerina schwageri : Loeblich and Tappan, 1994, p. 128, pl. 249, figs. 10-20.

Material examined. Korea, off southern coast of Jeju, St. 10, 32°30 ʹ 00 ʺ N, 127°00 ʹ 00 ʺ E, 8 Aug 2019, by Smith-McIntyre grab, collected by Nayeon Park and Somin Lee. NIBR ID: NIBRPR0000110835, MFORBK ID: MFOR BK00221 .

Diagnosis. Test is large, elongate, sub-ovate, rounded in cross-section, and tapering toward a blunt point at the basal end. Chamber arrangement is triserial in early portion, later becomes loose and almost uniserial. Sutures are distinct, depressed, and somewhat oblique. Surface is ornamented by irregular longitudinal costae. Wall is calcareous, perforate, and the surface is somewhat glassy. Aperture is rounded at the terminal of short neck and surrounded by lip. The area around the neck on the final chamber is slightly depressed. Test length is about 930 μm, including neck.

Remarks. Uvigerina schwageri was originally reported from the Fiji Islands by Brady (1884). This species is similar to U. bermudezi in general appearance, but the latter has a more ovate, stout outline and blunt basal end than U. schwageri . Szarek (2001) reported two morphotypes of this species presumed to represent the megalospheric and microspheric form. One is the type with large test, broad basal end, and widely spaced costae. The other type has much smaller and slender test with small, sharply pointed initial end, and more narrowly spaced costae. The same aspect seems to be observed in the specimens of Loeblich and Tappan (1994). The present specimen has a somewhat more pointed basal end than the specimens in Hatta and Ujiie (1992; pl. 27, fig. 7), and Szarek (2001; p. 18, fig. 16).

Distribution. Korea, Japan, China, Philippines, Fiji.

Figures

Plate 1. Photomicrograph and SEM image of the newly recorded species. 1. Rhabdammina abyssorum Sars in Carpenter, 1869; side view. 2. (a-b) Ammolagena clavata(Jones & Parker, 1860); 2a. Side view; 2b. Side view SEM image; scales: 200 μm. 3. (a-b) Nodosaria lamnulifera Boomgaart, 1950; 3a. Side view; 3b. Side view SEM image. 4. Uvigerina schwageri Brady, 1884; 4a. Side view; 4b. Side view SEM image; scales: 200 μm. 5. (a-c) Neoeponides bradyi (Le Calvez, 1974); SEM image; 5a. Ventral side view; 5b. Spiral side view; 5c. Lateral side view; scales: 200 μm.