Revision of H. ampliaperta group from Sat, 15/03/2008 - 19:30

Thu, 14/08/2008 - 19:58 — Anonymous

Citation:

H. ampliaperta group of Young (1998)

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

Remarks:

	H. ampliaperta - open central area	NN2-4
	H. truempyi - central penig 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
	H. waltrans - oblique bar	NN5