H. ampliaperta group

Edited by Lyndsey on Tue, 01/03/2011 - 13:14

H. ampliaperta group of Young (1998)

Description: Early Miocene group of large Helicosphaera species with weak wing, and broad central area.

Remarks:

Drawing	Outline description	Range
	H. ampliaperta - open central area	NN2-4
	H. truempyi - central opening spanned by narrow disjunct bar	NP21-NN1
	H. scissura - central opening is elongate slit	NN3-4
	H. mediterranea - central opening spanned by narrow conjunct bar	NN2-4