Description of two new Ecuadorian Zilchistrophia Weyrauch, 1960, with the clarification of the systematic position of the genus based on anatomical data (Gastropoda, Stylommatophora, Scolodontidae)

Schematic drawings showing the position of plicae sets in Zilchistrophia hilaryae sp. n. (A–H) and Zilchistrophia shiwiarorum sp. n. (I–M). Adult shells: A–E, I–L; juvenile shells: F–H, M. A NHMUK 20020375.1 (holotype) B NHMUK 20020370 C NHMUK 20020375, paratype1 D NHMUK 20020388 E NHMUK 20020374 F NHMUK 20020375, paratype2 G NHMUK 20020375, paratype3 H NHMUK 20020372 I NHMUK 20020381 J NHMUK 20020378 K NHMUK 20020382 (holotype) L NHMUK 20020380 M NHMUK 20020376.