Clavulina angularis d’Orbigny, 1826

Figure 16.1

1826 Clavulina angularis d’Orbigny, p. 268, pl. 12, fig. 7.

1969 Clavulina angularis d’Orbigny; Keller, p. E9, pl. 1, fig. 2; pl. 11, fig. 4.

Description. Test elongate, slender, sharply pointed, tricarinate, parallel sides tapering at the ends, cross section triangular, wall agglutinated, surface smoothly finished; initial chambers distinctly uniserial, final triserial chambers indistinct; periphery acute, sutures curved backwards and depressed; aperture terminal, round in the middle portion of the apertural face.