Table 7.

Main morphological differences (shell and genital organs) among the Sicania taxa.

	Sicaniacrassicostata comb. nov.	Sicaniaeminens comb. nov.	Sicanianobilisnobilis comb. nov.	Sicanianobilisspezialensis comb. nov., stat. nov.
Whorls	ribbed, percostate	ribbed	weakly rib-striated	densely ribbed
Surface	opaque	opaque	white surface layer	white surface layer
Dorsal keel	weak	weak or missing	missing	missing
AUPP	missing	present, visible from outside	present, mostly not visible from outside	mostly missing
ALPP	very short or mostly missing	present, visible from outside	present, visible from outside	very short to knob-like, not visible from outside
Spiralis	not overlapping parietalis	overlapping parietalis	slightly overlapping parietalis	mostly not overlapping parietalis
Sculpturing of atrium	fleshy pleats	large fleshy pleats	irregular folds	irregular fleshy folds.
Sculpturing of vagina	smooth to an irregular	smooth to an irregular	smooth to an irregular	distally irregular pleats, proximally oblique pleats
Sculpturing of penis	longitudinal fleshy smooth pleats	longitudinal fleshy pleats	smooth, tubercles, longitudinal, segmented pleats	longitudinal fleshy smooth pleats
Pseudopapilla	short and conical	small and rounded	big and elongate to small and round	little, rhombus-shaped and smooth
Epiphallar ring	single	single	two or three	two
Sculpturing of epiphallus	two main longitudinal pleats	two main longitudinal pleats	two main longitudinal pleats	three or four irregular longitudinal fringed pleats