Table 1.

Range, interquartile range, median, and number of specimens of each sex for the 5 distance measurements. Significance levels of t-test: ‘***’ p < 0.001, ‘**’ p < 0.01, ‘*’ p < 0.05, ‘.’ p < 0.1, ‘ ’ p < 1. All measurements in μm.

shell height ***
sex	min.	1st quartile	median	3rd quartile	max.	N
females	6915	7428	7572	7780	8261	104
males	6549	6956	7120	7271	7873	116
shell width
sex	min.	1st quartile	median	3rd quartile	max.	N
females	3615	3822	3878	3954	4207	104
males	3573	3837	3929	4003	4332	116
aperture height ***
sex	min.	1st quartile	median	3rd quartile	max.	N
females	2249	2535	2596	2681	2953	104
males	2189	2587	2689	2772	2962	116
aperture width
sex	min.	1st quartile	median	3rd quartile	max.	N
females	2166	2504	2564	2652	2902	104
males	2161	2456	2564	2650	2893	116
whorl width ***
sex	min.	1st quartile	median	3rd quartile	max.	N
females	3069	3202	3258	3325	3531	104
males	2994	3117	3175	3228	3383	116