A new species of Hypselaster (Echinoidea, Spatangoida) from the Middle Eocene Midawara Formation of the Eastern Desert, Egypt

Swiss Journal of Palaeontology

Table 1 Measurements of sixteen specimens of Hypselaster strougoi Elattaar, n. sp

N = 16	L	W	H	W/L	H/L	Lpt					Npp					A	A/L	Locality and type
N = 16	L	W	H	W/L	H/L	I	II	I/II	I/L	II/L	I	II	I/II	I/L	II/L	A	A/L	Locality and type
	14.1	13.3	10.3	0.94	0.73	3.1	5.0	0.62	0.22	0.35	14	19	0.74	0.99	1.35	7.9	0.56	Gh
	21.9	20.0	16.0	0.91	0.73	5.6	8.4	0.67	0.26	0.38	18	24	0.75	0.82	1.10	12.4	0.57	Gr
	22.4	21.0	14.8	0.94	0.66	6.1	8.8	0.69	0.27	0.39	18	23	0.78	0.80	1.03	12.5	0.56	Gr
	24.4	23.0		0.94		5.8	8.8	0.66	0.24	0.36	17	22	0.77	0.70	0.90	14.2	0.58	Gr
	25.9	25.0		0.97		6.8	9.6	0.71	0.26	0.37	17	22	0.77	0.66	0.85	14.7	0.57	Gr
	28.4	25.5	20.7	0.90	0.73	7.8	11.2	0.70	0.27	0.39	19	23	0.83	0.67	0.81	17.4	0.61	Gr
	28.6	27.6	19.3	0.97	0.67	7.8	11.2	0.70	0.27	0.39	19	25	0.76	0.66	0.87	16.1	0.56	Gr, Paratype1
	31.0	28.6	20.8	0.92	0.67	8.0	11.4	0.70	0.26	0.37	20	25	0.80	0.65	0.81	18.3	0.59	Gr
	31.2	29.5		0.95		8.1	11.4	0.71	0.26	0.37	20	24	0.83	0.64	0.77	18.4	0.59	SGh, Paratype2
	31.7	28.6	22.0	0.90	0.69	8.5	12.1	0.70	0.27	0.38	20	26	0.77	0.63	0.82	19.5	0.62	Gr
	34.3	31.0	22.7	0.90	0.66	8.9	12.5	0.71	0.26	0.36	21	26	0.81	0.61	0.76	21.2	0.62	Gr
	35.8	34.6		0.97		10.5	14.6	0.72	0.29	0.41	21	25	0.84	0.59	0.70	20.0	0.56	Gr
	35.9	33.6	24.4	0.94	0.68	10.2	14.6	0.70	0.28	0.41	19	24	0.79	0.53	0.67	21.6	0.60	Gr, Holotype
	36.5	34.5		0.95		10.4	14.5	0.72	0.28	0.40	20	25	0.80	0.55	0.68	20.9	0.57	Gr
	37.2	35.0	24.5	0.94	0.66	10.4	14.3	0.73	0.28	0.38	22	27	0.81	0.59	0.73	23.5	0.63	Gr
	38.0	35.3	27.0	0.93	0.71	11.3	15.7	0.72	0.30	0.41	19	23	0.83	0.50	0.61	23.4	0.62	Gr
Range	14.1–38.0	13.3–35.3	10.3–27.0	0.90–0.97	0.66–0.73	3.1–11.3	5.0–15.7	0.62–0.73	0.22–0.30	0.35–0.41	14–22	19.0–27.0	0.74–0.84	0.50–0.99	0.61–1.35	7.9–23.5	0.56–0.63
Mean	29.8	27.9	20.2	0.93	0.69	8.1	11.5	0.70	0.27	0.38	19.0	23.9	0.79	0.66	0.84	17.6	0.59