Procerolagena gracilis (Williamson, 1848)

Figure 2.22

1848 Lagena gracilis Williamson, p. 13, pl. 1, fig. 5.

2008 Procerolagena gracilis (Williamson); Riveiros and Patterson, p. 16, fig. 6.7.

2015 Procerolagena gracilis (Williamson); Hanagata and Nobuhara, p. 37, fig. 13.12.

Description. Test slightly elongate, unilocular with a distinct basal spine, wall calcareous, finely perforate, surface ornamented with long striae extending only up to half of the neck; aperture terminal, at the end of the neck, bordered by a phialine lip.