Lobatula lobatula (Walker and Jacob, 1798)

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 : 44

Lobatula lobatula (Walker and Jacob, 1798)

Figure 12.1-2

1798 Nautilus lobatulus Walker and Jacob , p. 642, pl. 14, fig. 36.

2003 Cibicides lobatulus (Walker and Jacob) ; Murray, p. 21, fig. 6.13-15.

2006 Lobatula lobatula (Walker and Jacob) ; Oflaz, p. 299, pl. 8, figs. 12-13.

2007 Cibicides lobatulus (Walker and Jacob) ; Talib and Farroqui, p. 19, pl.1, fig. 20a-b.

2010 Lobatula lobatula (Walker and Jacob) ; Margreth, p. 122, pl. 35, fig. 1a-c.

2012 Lobatula lobatula (Walker and Jacob) ; Debenay, p. 201.

2012 Lobatula lobatula (Walker and Jacob) ; Milker and Schmiedl, p. 107, fig. 24.17-20.

Description. Test with different morphology, planoconvex, spiral side flat, umbilical side convex, wall calcareous, perforate, surface smooth; chambers gradually increasing in size, trochospirally arranged; periphery carinate and lobulate, sutures curved backwards and slightly raised on the spiral side, radial and slightly depressed on the umbilical side; aperture interiomarginal, an equatorial arch, covered by a narrow lamina on the apertural side.

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).