Chamalycaeus rarus Pall-Gergely & Auffenberg, 2019

Pall-Gergely, Barna, Sajan, Sheikh, Tripathy, Basudev, Meng, Kaibaryer, Asami, Takahiro & Ablett, Jonathan D., 2020, Genus-level revision of the Alycaeidae (Gastropoda, Cyclophoroidea), with an annotated species catalogue, ZooKeys 981, pp. 1-220 : 1

Chamalycaeus rarus Pall-Gergely & Auffenberg, 2019

Chamalycaeus rarus Páll-Gergely & Auffenberg, 2019: 382, fig. 6C.

Type locality.

"Philippine Islands, Palawan Prov., 50 km SW of Quezon, along trail from Ransang to Tau’t Batu Caves, 90-390 m a.s.l., 8°53'N, 117°35'E ".

Material examined.

Only the holotype (UF 525657) is known.

Remarks.

R1 rather strongly and irregularly ribbed with weaker spiral striation; R2 + R3 short, less than 90° combined; R2 shorter than R3; ribs on R2 lamella-like; spiral striation also visible on R2; R3 with spiral striation and weaker ribs than those on R1.

The placement of this species into the genus Chamalycaeus is based on biogeographic information alone, since the protoconch, which is necessary for generic allocation, is absent in the only available shell ( Páll-Gergely and Auffenberg 2019).