Snail Fauna of Taro Paddy in Lanyu


Class Gastropoda
Subclass Prosobranchia
Order Archaeogastropoda (Neritacea)
Family Nertidae (distributed in stream delta, sandy swamp)
1=N. subsulcata, 2=Neritina pulligera, 3=N. variegera, 4=N. turrita, 5=N. parallela, 6=N. plumbea, 7=N. violacea

12 & 45ab =Septaria porcellana (-janelli), 13 & 47=S. lineata

Order Mesogastropoda
Family Assimineidae: Assiminea kurodai and A. hayasii (Taiwan Endemics)
Family Stenothyridae: Stenothyra formosana
Family Vivipariidae
Cipangopaludina chinensis (Gray) ps: smooth shell w/o trans ring
Family Ampullariidae (-Pilidae)
54=Ampullarius(Pila) canaliculata (Lamarck) ps: trans ring

Order Cerithiacea
Family Thiaridae
59 & 1=Thiara (Stenomelania) plicaria ps: (spine) light brown, shell length=5cm, ring fracture invisible
56 & 6=Thiara (Melanoides) tuberculata (formosanus) ps: (web) dark brown, shell length=4cm, sharp tip, slightly visible ring fracture
57 & 2=Thiara (Tarebia) granifera ps: (tumor) light brown, shell length=2.5cm, granular convex on shell
58 & 3=Thiara scabra ps: (tower) drak brown, shell length=1.5cm, shape short fat, shoulder with convex, not sharp tip
Thiara (Stenomelania) torulosa (ps: bind node, dark brown, shell length=5cm, square granular convex on shell, high tower and sharp), Thiara (Melanoides) riqueti

Subclass Pulmonata
Order Basommatophora
Family Lymnaeidae
62=Radix (Lymnaea) auricularia swinhoei (Adams)
63=Austropeplea (Myxas,Lymnaea) ollula (Gould)
Family Planorbidae
Segmentina (Polypylis) hemisphaerala

Subclass Pulmonata
Order Stylommatophora (slug and snail)