Rhachistia Connolly, 1925

Sutcharit, Chirasak, Naggs, Fred & Panha, Somsak, 2010, A First Record Of The Family Cerastidae In Thailand, With A Description Of A New Species (Pulmonata: Orthurethra: Cerastidae), Raffles Bulletin of Zoology 58 (2), pp. 251-258 : 252

Rhachistia Connolly, 1925

Type species. – Bulimulus rhodotaenia Martens, 1869 ; by original designation Connolly, 1925; 163.

Remarks. – Rhachistia usually has comparatively small shells, thin to slightly solid and ovate to elongate conic. The surface is smooth, fairly glossy and cream with a series of dark spots and/or bands. The aperture is ovate, peristome simple; umbilicus narrow ( Connolly, 1925; Solem, 1959b; Schileyko, 1998). Radula teeth are spatulate with monocuspid central teeth and bicuspid lateral teeth. The genitalia are typical of cerastids, with a very short gametolytic sac, a short to long penial appendix, short penis and a brownish spongy tissue lining the atrium and vagina ( Solem, 1973; Smith & Stanisic, 1998).