Alycaeus

• Alycaeus conformis

  The shell is conical, with rounded whorl peripheries and an open umbilicus. The aperture is circular and moderately expanded, with a thickened double rim, a narrow interspace and a slight notch at the suture. The living body and head are grey, with dark grey to black tentacles. It lives under large rotten logs and on leaf litter in wet, shady forests in both limestone and non-limestone areas. It is recorded locally in Perak and widely in Kelantan, Pahang, Selangor and Johor, Malaysia.

• Alycaeus gibbosulus

  The shell is conical, with rounded whorl peripheries and an open umbilicus. The aperture is circular and moderately expanded, with a thickened double rim and a narrow to wide interspace. The living body and head are brown, with light to dark grey tentacles. It lives under large rotten logs or on leaf litter in wet, shady forests in both limestone and non-limestone areas. It is known widely from Perlis to Perak on the west coast of Peninsular Malaysia and from parts of Kelantan and Terengganu on the east coast.

• Alycaeus jousseaumei

  The shell is flat, with rounded whorl peripheries. The aperture is circular and very expanded. Spiral lines are absent from the shell. It lives on limestone rock surfaces and in crevices in wet, shady forests on limestone hills. It is known from the limestone karsts of Kinta Valley, Perak, Malaysia.