Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Somsak Panha
Zookeys
Figure 2.Living snails of A Perrottetia dermapyrrhosa sp. n.(paratype CUMZ 5002) from the type locality (shell width about 7 mm), and B Perrottetia aquilonaria sp. n. (paratype CUMZ 5004) from the type locality (shell width about 6 mm).
Thanit Siriboon, Chirasak Sutcharit, Fred Naggs, Ben Rowson, Somsak Panha
Zookeys
Figure 1.Schematic of shell shapes, last whorl expansion and parietal lamella shape. Terminology of Discartemon apertural dentition in figure B. A–C Shell form and spire A flattened shell with concave spire B depressed-heliciform shell with only slightly convex spire, and C globose-heliciform with conical spire D–F Last whorl expansion D rapidly expanded E intermediately expanded, and F regularly expanded G–I Parietal lamella form G single lamella with straight shape (typical) H single lamella with curved shape (sinuous), and I modified with “Y” shaped lamella.