Amphidromus theobaldianus (Benson, 1857)

Sutcharit, Chirasak, Ablett, Jonathan, Tongkerd, Piyoros, Naggs, Fred & Panha, Somsak, 2015, Illustrated type catalogue of Amphidromus Albers, 1850 in the Natural History Museum, London, and descriptions of two new species, ZooKeys 492, pp. 49-105 : 80

Taxon classification Animalia Stylommatophora Camaenidae

Amphidromus theobaldianus (Benson, 1857)

Bulimus theobaldianus Benson, 1857: 329, 330.

Type locality.

Yanglaw, Tenasserim [in the area of Tanintharyi Region, Myanmar].

Type material.

Possible syntype NHMUK 1907.11.21.64 (1D juvenile; Fig. 15D; H=22.3 mm, W=12.4 mm).

Remarks.

The original description seems to be based on one specimen and a single set of measurements was given. Benson (1857: 329) stated "peristomate tenui?" [=peristome thin?], and Theobald (1876: 187) also stated “… described by Benson from an imperfect example", which we have interpreted as meaning that the type specimen is an immature shell. The NHM holds a lot containing a juvenile specimen figured in Hanley and Theobald (1870: pl. 19, fig. 10), and the label states "from Hanley coll. figd in Con. Ind. pl. 19, fig. 10". The collection locality states “Tenasserim” which agrees with the original description. However, this specimen is larger than the dimensions given, so we refrain from designating it as the lectotype.