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.