Planogypsina acervalis (Brady, 1884)

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 : 48

Planogypsina acervalis (Brady, 1884)

Figure 12.20

1884 Planorbulina acervalis Brady , p. 657, pl. 92, fig. 4.

2009 Planogypsina acervalis (Brady) ; Debenay, p. 246.

Description. Test attached, large, outline nearly discoid, dorsal side slightly convex, ventral side flattened, wall coarsely perforate; chambers inflated, subglobular, evenly added, and almost equidimensional, secondary chambers added irregularly and dispersed on the entire test surface; peripheral margin cuspate, periphery lobulated; primary apertures two arched openings at the juncture of earlier chambers, bordered by a rim, secondary apertures multiple, tiny sutural openings at either side of the test, peripheral and tubular openings.

Figures

FIGURE 12. 1-2, Lobatula lobatula (Walker and Jacob, 1798) in dorsal view (scale equals 400 μm) (1) and in ventral view (scale equals 100 μm) (2). 3-4, Cymbaloporetta bradyi (Cushman, 1915) in dorsal view (scale equals 200 μm) (3) and in ventral view (scale equals 300 μm) (4). 5, Riminopsis asterizans (Fichtel and Moll, 1798) in dorsal view (scale equals 200 μm). 6-7, Hansenisca soldanii (d’Orbigny, 1826) in dorsal view (scale equals 200 μm) (6) and in ventral view (scale equals 100 μm) (7). 8, Operculina ammonoides (Gronovius, 1781) in dorsal view (scale equals 1 mm). 9, Operculina bartschi Cushman, 1921 in dorsal view (scale equals 1 mm). 10, Operculina complanata (Defrance, 1822) in dorsal view (scale equals 500 μm). 11, Operculina discoidalis d’Orbigny, 1826 in dorsal view (scale equals 500 μm). 12, Operculina elegans Cushman, 1921 in dorsal view (scale equals 1 mm). 13, Operculina granulosa Leymerie, 1846 in dorsal view (scale equals 500 μm). 14, Operculina hardiei d’Archiac and Haime, 1853 in dorsal view (scale equals 500 μm). 15, Heterostegina depressa d’Orbigny, 1826 in dorsal view (scale equals 300 μm). 16, Planostegina operculinoides (Hofker, 1927) in dorsal view (scale equals 1 mm). 17-19, Pileolina patelliformis (Brady, 1884) in dorsal view (scale equals 200 μm) (17); in lateral view (scale equals 100 μm) (18); and in ventral view (scale equals 100 μm) (19). 20, Planogypsina acervalis (Brady, 1884) in dorsal view (scale equals 500 μm). 21, Sphaerogypsina globulus (Reuss, 1848) in dorsal view (scale equals 300 μm).