Table 1.

Sutural thickness and stereom density measurements of the test of E. pusillus. mad, median absolute deviation; n, sample size.

		median	mad	minimum	maximum	n
plate thickness (µm)	ambulacral	260.74	47.94	193.10	359.83	30
	buttress	872.48	132.26	614.91	1586.68	30
suture thickness (µm)	perradial	380.94	40.96	340.52	479.65	15
	interradial	346.25	60.36	280.49	607.03	15
	adradial	343.50	72.28	262.14	454.35	15
stereom density (%)	suture	49.43	3.20	47.27	54.12	9
	galleried stereom	45.35	2.92	40.77	49.96	9
	labyrinthic stereom	48.01	1.49	44.74	50.43	9
	total	48.01	2.89	40.77	54.12	27