Cribroelphidium excavatum (Terquem, 1875)

Symphonia, Tabita K. & Senthil, Nathan D., 2019, Taxonomic notes on Recent Foraminifera from the Continental Shelf-Slope Region of Southwestern Bay of Bengal, East Coast of India, Palaeontologia Electronica (55 A) 22 (3), pp. 1-89 : 22

Cribroelphidium excavatum (Terquem, 1875)

Figure 6.3

1875 Polystomella excavatum, Terquem , p. 25, pl. 2, fig. 2a-f.

2008 Cribroelphidium excavatum (Terquem) ; Riveiros and Patterson, p. 32, fig. 14.1-5.

Description. Test free, slightly compressed, wall calcareous, surface smooth but for pustular sutures, umbilical region and apertural side, umbilicus slightly depressed, with a knob; chambers few, slightly inflated, gradually increasing in size as added, coiling involute, arranged planispirally; periphery broadly rounded, peripheral margin lobulate, sutures distinct, slightly depressed, curved backwards, each intercepted with large pores and short perpendicular sutural joints; aperture interiomarginal, multiple, a series of rounded openings on the apertural face.

Figures

FIGURE 6. 1-2, Calcarina spengleri (Gmelin, 1791) in dorsal view (scale equals 500 μm) (1) and in ventral view (scale equals 500 μm) (2). 3, Cribroelphidium excavatum (Terquem, 1875) in ventral view (scale equals 100 μm). 4, Cribroelphidium poeyanum (d’Orbigny, 1826) in dorsal view (scale equals 100 μm). 5, Elphidiella hannai (Cushman and Grant, 1927) in ventral view (scale equals 200 μm). 6, Elphidium advenum subsp. limbatum (Chapman, 1907) in dorsal view (scale equals 200 μm). 7, Elphidium advenum var. depressulum Cushman, 1933 in ventral view (scale equals 200 μm). 8, Elphidium asiaticum Polski, 1959 in ventral view (scale equals 100 μm). 9, Elphidium botaniense Albani, 1981 in ventral view (scale equals 200 μm). 10, Elphidium carteri Hayward in Hayward, Hollis and Grenfell, 1997 in dorsal view (scale equals 100 μm). 11, Elphidium charlottense (Vella, 1957) in dorsal view (scale equals 200 μm). 12, Elphidium charlottense (Vella, 1957) in apertural view (scale equals 200 μm). 13, Elphidium craticulatum (Fichtel and Moll, 1798) in dorsal view (scale equals 400 μm). 14, Elphidium crispum (Linnaeus, 1758) in dorsal view (scale equals 300 μm). 15-16, Elphidium hispidulum Cushman, 1936 in apertural view (scale equals 300 μm) (15) and in dorsal view (scale equals 300 μm) (16). 17, Elphidium macellum (Fichtel and Moll, 1798) in dorsal view (scale equals 300 μm). 18, Elphidium somaense Takayanagi, 1955 in ventral view (scale equals 200 μm). 19, Elphidium striatopunctatum (Fichtel and Moll, 1798) in dorsal view (scale equals 400 μm). 20, Nonion fabum (Fichtel and Moll, 1798) in dorsal view (scale equals 200 μm).