A new Helicostyla species (Bradybaenidae: Helicostylinae) from Patnanungan Island, Philippines

作者：de Chavez Emmanuel Ryan C^*; Fontanilla Ian Kendrich C; Batomalaque Gizelle A; Chiba Satoshi

来源：Asia Life Sciences, 2015, 24(1): 37-49.

• land snail
• Helicostyla
• Helicostyla amagaensis new species
• Helicostylinae
• taxonomy
• Patnanungan Island
• Polillo Island Group
• Philippines

A new species of land snail, Helicostyla amagaensis de Chavez, belonging to Subfamily Helicostylinae, Family Bradybaenidae is described from a native dipterocarp forest in Patnanungan Island, Polillo Group of Islands, Philippines. This new species differs from other congeners by its ovate-globose, cream white shell with single chestnut brown band. Aperture is ovate and moderately oblique with reddish-brown streak around the aperture outer lip. Penis is long with inner oblique striations terminating towards a leaf-like stimulator. Vas deferens is short and flagellum is absent. DNA barcoding technique using Cytochrome c oxidase I subunit (COI) revealed H. amagaensis has closest sequence affinity with Helicostyla woodiana. Neighbor joining and maximum parsimony trees showed 100% bootstrap support for the inclusion of this new species as a member of the genus Helicostyla. This is the latest Helicostyla discovered in the Philippines and the third helicostyline snail that is endemic to the Polillo Group of Islands.

• 出版日期2015-6