Astrononion stelligerum (d'Orbigny, 1839b)

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 : 27

Astrononion stelligerum (d'Orbigny, 1839b)

Figure 7.11

1839b Nonionina stelligera d’Orbigny , p. 128, pl. 3, figs. 1-2.

2006 Astrononion stelligerum (d’Orbigny) ; Oflaz, p. 301, pl. 9, figs. 9-10.

2012 Astrononion stelligerum (d’Orbigny) ; Milker and Schmiedl, p. 113, fig. 26.7-8.

Description. Test compressed, side view circular, umbilical area depressed, wall calcareous, finely perforate, surface smooth, umbilicus, apertural side and along the sutures covered with granular pustules; chambers distinct, elongate, narrow, slightly inflated, gradually increasing in size; periphery subrounded, margin slightly angular, sutures distinct, strongly curved, slightly depressed; aperture an interiomarginal, low arch, equatorial opening at the base of the apertural face, bordered by a rim.

Figures

FIGURE 7. 1-2, Amphistegina bicirculata Larsen, 1976 in dorsal view (scale equals 1 mm) (1) and in ventral view (scale equals 1 mm) (2). 3-4, Amphistegina gibbosa d’Orbigny, 1839 in dorsal view (scale equals 500 μm) (3) and in lateral view (scale equals 500 μm) (4). 5, Amphistegina lessonii d’Orbigny in Guerin-Meneville, 1843 in dorsal view (scale equals 400 μm). 6-7, Amphistegina papillosa Said, 1949 in dorsal view (scale equals 500 μm) (6) and in lateral view (scale equals 300 μm) (7). 8-10, Amphistegina radiata (Fichtel and Moll, 1798) in dorsal view (scale equals 500 μm) (8); in ventral view (scale equals 500 μm) (9); and in lateral view (scale equals 500 μm) (10). 11, Astrononion stelligerum (d'Orbigny, 1839) in dorsal view (scale equals 300 μm). 12, Nonion commune (d'Orbigny, 1846) in dorsal view (scale equals 200 μm). 13, Nonion costiferum (Cushman, 1926) in dorsal view (scale equals 200 μm). 14, Nonionella basispinata (Cushman and Moyer, 1930) in dorsal view (scale equals 200 μm). 15, Nonionellina labradorica (Dawson, 1860) in dorsal view (scale equals 200 μm). 16, Nonionoides elongatum (d'Orbigny, 1852) in dorsal view (scale equals 200 μm). 17, Nonionoides grateloupii (d'Orbigny, 1839a) in dorsal view (scale equals 200 μm). 18, Nonionoides turgida (Williamson, 1858) in ventral view (scale equals 100 μm). 19, Nonionoides boueana (d'Orbigny, 1846) in dorsal view (scale equals 200 μm). 20, Haynesina depressula (Walker and Jacob, 1798) in dorsal view (scale equals 100 μm).