NON-MARINE MOLLUSKS OF BATANES
Species in isolated small islands like the Batanes are susceptible to extinction, especially when major environmental changes occur.

Y’Ami

This is a photo guide of the non-marine mollusks in the major islands of Batanes. Under each photo is the scientific name, taxonomic
family, the local name (if any), and shell height (SH); the color of the circles indicate the island/s where the species is/are found. TheIUCN conservation status (CS) of each species is also indicated; conservation status could not be determined for species only identi-Mavudis

fied to the genus level. Future monitoring is recommended to ensure the maintenance of these populations. Furthermore, limestone

Siayancliffs and karst outcrops should be protected from land conversion and quarrying because these habitats harbor a rich diversity ofmicro snails.

Itbayat

Dinem

Cyclophorus batanicus

Platyrhaphe coptoloma

Family Cyclophoridae

Family Cyclophoridae“chidway/chilway”

SH: 22 mm

CS: least concern

SH: 6 mm

CS: other threatened species

Batan

Pomacea canaliculata

Jagora asperata

Family AmpulariidaeFamily Pachychilidae

Dequey“piret”

SabtangIvuhosSulfurina sp.

Family Helicinidae

Family Helicinidae
SH: 4.8 mm

SH: 4 mm

Zaptyx jamesi

Zaptyx thompsoni

Family Clausiliidae

Family Clausiliidae

CS: other threatened

CS: other threatened

species

species

SH: 13 mm

SH: 11 mmPythia pantherina
Family Ellobiidae

SH: 46 mm

CS: least concern

CS: least concern

Geophorus trochaceus
CS: least concern“kuhol”

SH: 57 mm

Allepithema philippinense

Omphalotropis columellaris

Family Assimineidae

Family Assimineidae

CS: least concern

CS: least concern

SH: 3.4 mm

Sivella splendens

Sivella sp.

Family Helicarionidae

Family Helicarionidae

CS: least concern

SH: 4.5 mm

Palaina modesta

Pupina sp.

Georissa carinulata

Family Diplommatinidae

Family Pupinidae

Family Hydrocenidae

CS: least concern SH: 3.1 mm

SH: 5.3 mm

CS: least concern

SH: 3.9 mm

Allopeas clavulinum

Allopeas gracile

Opeas hannense

Family Achatinidae

Family Achatinidae

Family Achatinidae

CS: least concern

CS: least concern

CS: least concern

SH: 5.6 mm

SH: 6 mm

SH: 4.5 mm

SH: 5 mm

Helicarion bicarinatus

Bradybaena mighelsiana

Helicostyla buschi

Family Helicarionidae

Family Camaenidae

Family Camaenidae

CS: least concern

SH: 2 mm

SH: 8 mm“sayih/sayi”“taveh”

SH: 15 mm

CS: other threatened species

CS: other threatened species

SH: 18 mm

SH: 27-35 mm

Helicostyla speciosa
Family Camaenidae“kayavu”

SH: 26-32 mm

CS: other threatened species

Obba listeri batanensis

Pancala batanica

Beilania philippinensis

Gastrocopta pediculus

Family Camaenidae

Family Camaenidae

Family Endodontidae

Family Gastrocoptidae

Hypselostoma sp.

Diaphera sp.

Gulella bicolor“tadpepeng”

CS: other threatened species

CS: least concern

CS: least concern

Family Gastrocoptidae

Family Diapheridae

Family Streptaxidae

SH: 16 mm

SH: 2 mm

SH: 2.4 mm

SH: 1.8 mm

SH: 6 mm

SH: 5 mm

SH: 16 mm

CS: other threatened species

Ryssota antonii
Family Chronidae“marida”

SH: 41-50 mm

Inozonites sp.

Coneuplecta turrita

Lamprocystis sp.

Family Dyakiidae

Family Euconulidae

Family Microcystidae

CS: least concern

SH: 4.5 mm

SH: 2.8 mm

SH: 4.4 mm

CS: other threatened species

This project was funded by the Nagao Natural Environment Foundation (NEF) Research Grant awarded to Gizelle A.
Batomalaque, Ph.D. of the University of the Philippines Diliman (UPD-IB) Institute of Biology. The team wascomprised of the following researchers from the University of the Philippines (UP) and Batanes State College (BSC):
Lawrence Jacob C. Alterado (UPD-IB), Zenaida G. Baoanan, Ph.D. (UPB-DB), Emmanuel Ryan C. De Chavez, Ph.D.
(UPLB-IBS), Alex Cruz (BSC), Ian Kendrich C. Fontanilla, Ph.D. (UPD-IB), Harold B. Lipae (UPLB-IBS), and Xina Vinalay(BSC). Jamin Benedict S. Santos (UPB-IBS) assisted in photographing micro snails.

Microcystis sp.
Family Microcystidae

SH: 1.8 mm