Perrottetia daedaleus (Bavay & Dautzenberg, 1908)

Inkhavilay, Khamla, Siriboon, Thanit, Sutcharit, Chirasak, Rowson, Ben & Panha, Somsak, 2016, The first revision of the carnivorous land snail family Streptaxidae in Laos, with description of three new species (Pulmonata, Stylommatophora, Streptaxidae), ZooKeys 589, pp. 23-53 : 35

Taxon classification Animalia Pulmonata Streptaxidae

Perrottetia daedaleus (Bavay & Dautzenberg, 1908) Fig. 5C

Streptaxis daedaleus Bavay and Dautzenberg 1908: 230. Type locality: Pac-Kha [Pa Kha, Son La Province, Vietnam]. Bavay and Dautzenberg 1909: 164, 165, pl. 4, figs 1-4.

Streptaxis daedaleus var. major Bavay and Dautzenberg 1908: 231. Type locality: Pac-Kha [Pa Kha, Son La Province, Vietnam]. Bavay and Dautzenberg 1909: 165.

Oophana daedaleus - Richardson 1988: 234. Schileyko 2011: 23.

Oophana daedaleus major - Richardson 1988: 234.

Material examined.

Syntype of Streptaxis daedaleus var. major MNHN-IM 200030871 (Fig. 5B). Tonkin: NHMUK 1909.6.9.118-9 (2 shells). Pac-Kha, Tonkin: NHMUK 1909.7.9.15-6 (2 shells), NHMUK Preston coll. date 7.4.09 (2 shells), Rolle coll. date 27.11.09 (3 shells). Long Ping, Tonkin: NHMUK Rolle coll. date 27.1.09 (2 shells).

Remarks.

Shell suboblique-heliciform with a convex spire and 6 whorls. Shell surface with strong transverse ridges running continuously to umbilicus. Embryonic shell with thin transverse ridges and following whorl regularly expanded. Last whorl rounded, axially deflected, longitudinal furrows present. Aperture triangular; peristome discontinuous, thickened, broadly expanded and sinulus absent. Apertural dentition with two parietal lamellae (lower one small; upper one large and close to sinulus), one angular lamella, one palatal lamella (located far inside aperture) and one columellar lamella.

This species is superficially similar to Perrottetia mabillei (Bavay & Dautzenberg, 1903) in having strong transverse ridge over the entire shell, but Perrottetia daedaleus has a large upper parietal lamella, a palatal lamella located inside the aperture, and strong columellar lamellae, while Perrottetia mabillei (Fig. 5B) has a large lower parietal lamella and bifid columellar lamellae.