TAXONOMIC RE-EVALUATION OF SARIKA DIADEMA (BALL, 1897) AND S. ASAMURAI (PANHA, 1997), TWO ENDEMIC LAND SNAILS FROM THAILAND (PULMONATA: ARIOPHANTIDAE: MACROCHLAMYDINAE)

摘要

The taxonomic status and distribution of two endemic, allopatric land snails from southern Thailand, Sarika diadema (Dall, 1897) and S. asamurai (Panha, 1997) was investigated. Two key morphological features allow the two species to be discriminated:i) the dart apparatus is located centrally on the vagina in S. diadema but proximally on the vagina in S. asamurai; and ii) Sarika diadema has one spine at the junction of the spermatophore tail filament and sperm sac, whilst S. asamurai has two spines.