Nannotax Enabling nannofossil research

Description: Like H. carterae but central-area spanned by curved disjunct bar (i.e. the bar behaves as a discrete crystal unit)

Remarks: Also similar to H. euphratis, but there are discrete opening above and below the ba, whereas in H. euphratis the bar virtually fills the central area.

Range: NP21 to NN12.