Table 2.

Shell parameters for F. umpquaensis. Measurements are in mm.

	SH	SW	HBW	WBW	AH	AW
Holotype, USNM 1144535
	7.77	5.97	6.64	4.93	4.39	3.88
Paratypes, USNM 1422224 (N = 10)
Mean	7.37	5.71	6.57	4.91	4.24	3.80
S.D.	0.36	0.35	0.28	0.33	0.22	0.22
Range	6.89–7.96	5.37–6.48	6.21–7.25	4.59–5.73	3.89–4.59	3.56–4.29