Freshwater Molluscs of India: An Insight of into Their Diversity, Distribution and Conservation - Aquatic Ecosystem: Biodiversity, Ecology and Conservation - page 175

Table 11.4 (continued)
Name Key character for identii cation Habitat Distribution

Paludomus ( Tanalia ) loricatus (Reeve) Shell sculptured with prominent, nodules spiral

ridges

Rapid fl owing streams with slightly acidic
water

Assam

Paludomus ( Tanalia ) neritoides (Reeve) Shell oblong ovate, sculptured with fi ne spiral

ridges; aperture large with broad columellar
callus

In the bed of the river along with the mud Kerala

Lymnaea stagnalis (Linnaeus) Shell ovately turreted, yellowish horny, spire

produced and sharply acuminated; whorls 5-6

Lakes, pods, paddy fi elds Kashmir

Lymnaea ( Pseudosuccinea ) acuminata
(Lamarck)

Shell thin, ovate, spire short, acuminate, body
whorl much infl ated, a little angular above, with
a large aperture

Occurs in permanent water bodies with
abundant vegetation

Throughout India

Form t ypica (Lamarck)
Form brevissima (Annandale and Rao)
Form chlamys (Benson)
Form gracilior (Martens)
Form hians (Sowerby)
Form malleata (Annandale and Rao)
Form patula (Troschel)
Form rufescens (Gray)
Lymnaea ( Pseudosuccinea ) biacuminata
(Annandale and Rao)

Shell thin, fragile, narrow and elongate spindle
shaped; aperture large, ovoid; columella slightly
twisted and has a broad fold; umbilicus
completely occluded; sculptured with curved
longitudinal striae

Occurs in permanent water bodies with
abundant vegetation

Andhra Pradesh, Uttaranchal

Lymnaea ( Pseudosuccinea ) horae
(Annandale and Rao)

Shell with well-developed and broader spire,
with an extra half whorl of the apex; sculptures
minutely decussated with numerous, close set
of longitudinal striae

Found in clear water with muddy substratum,
on rotten twigs of trees which were fl oating in
water or partly embedded in mud at the bottom

Thumarkar nullah, near
Railway bridge, Sorupeta,
Assam

Lymnaea ( Pseudosuccinea ) luteola
(Lamarck)

Shell thin, glossy, body whorl less infl ated and
laterally compressed a little; spire
comparatively longer and gradually tapering;
aperture angulately narrows above

This species are found in particular habitat. It is
often found in temporary water bodies which
dry up in summer and overcome the
unfavourable conditions by burrowing in the
mud

Throughout India

Form typica (Lamarck)
Form australis (Annandale and Rao)
Form impura (Troschel)
Form ovalis (Gray)
Form succinea (Deshayes)