A FIRST RECORD OF THE FAMILY CERASTIDAE IN THAILAND, WITH A DESCRIPTION OF A NEW SPECIES (PULMONATA: ORTHURETHRA: CERASTIDAE)

作者：Sutcharit Chirasak; Naggs Fred; Panha Somsak^*

来源：Raffles Bulletin of Zoology, 2010, 58(2): 251-258.

• Cerastidae
• systematics
• taxonomy
• anatomy
• Orthurethra
• Pulmonata
• Southeast Asia
• Thailand

This first assessment of the status of the poorly known family Cerastidae in Thailand was made by comparing Thai material with types and additional specimens from natural history museums in Europe. Rhachistia sulphurea (Tomlin & Peile, 1930) and Amimopina subangulatus (Pfeiffer, 1862) were identified and a new species of Rhachistia from Thailand was recognised. We re-describe A. subangulatus and describe the new species Rhachistia conformalis Sutcharit & Panha, new species, which has a small, thin, elongately conic, dextral, yellowish-white to creamy ground coloured shell. Shell ornamentation consists of two rows of blackish spots and two spiral bands on the lower periphery. Radular teeth are typical of cerastids. The penial appendix is very long, being about twice that of the vaginal length, proximally thin, distally enlarged and of a cylindrical shape. The penis is short, small, proximally cylindrical and distally forming a swollen globular structure. The vagina is large, long and cylindrical in shape with blackish pigmentation along almost its entire length. The bud-like shaped gametolytic sac is very short.

• 出版日期2010-8-31