siamensis (Martens, 1860)

Sutcharit, Chirasak, Ablett, Jonathan D. & Panha, Somsak, 2019, An annotated type catalogue of seven genera of operculate land snails (Caenogastropoda, Cyclophoridae) in the Natural History Museum, London, ZooKeys 842, pp. 1-65 : 1

80. siamensis (Martens, 1860) Fig. 11D, E

Opisthoporus siamensis Martens, 1860: 10.

Cyclotus siamensis - Kobelt 1902: 211.

Current generic position.

Cyclotus Swainson, 1840

Type locality.

Siam [Thailand].

Type material.

Syntype NHMUK 1856.7.21.1 (5 adults + 3 juveniles; Fig. 11D, E).

Remarks.

Martens (1860) states that this species was described based on material in the British Museum [= NHM] collected by JC Bowring from Siam. The original description did not include an illustration and only one set of shell measurements was given. The NHM collections contain a lot of eight specimens with an original label stating "typical specimens", and with the collection locality “Siam”. The NHM registration book shows that this specimen lot was purchased from JC Bowring. The specimen that matches most closely with the shell measurements in the original description is figured herein (Fig. 11D).