Freshwater Molluscs of India: An Insight of into Their Diversity, Distribution and Conservation - Aquatic Ecosystem: Biodiversity, Ecology and Conservation - page 184

Pisidium ( Afropisidium ) clarkeanum (G.
and H. Nevill)

Shell infl ated, moderately thick, umbo
projecting greatly over the hinge, surface pale
yellow with close set striae

Ponds, lakes, wetlands, rivers Andhra Pradesh: Cuddapah;

Bihar: Harrapur, Bhagalpur;
Jharkhand, Maharashtra:
Mumbai; Manipur: Chandel;
Tamil Nadu: Nilgiris (7,400
ft); Uttar Pradesh: Roorkee;
West Bengal: Kolkata, 24
Parganas (South)

Pisidium ( Afropisidium ) ellisi (Dance) Shell semitransparent, thin, dorsal margin

sloping steeply on the posterior side, ventral
margin gently curved, periostracum yellowish
brown

Hill streams Sikkim

Pisidium ( Afropisidium ) nevillianum
(Theobald)

Shell thin, large, trigonal and porcellaneous,
striae all over umbones prominent and round

Narmada river, Gangetic river Madhya Pradesh: Narmada

River; Uttar Pradesh: Roorkee

Pisidium ( Europisidium ) mitchelli
(Prashad)

Shell subtrigonal, large very tumid, thin and
fragile, distinct closed-set striae all over, deep
horn colour, shining

Marshall Lake an altitude of 4,500 ft. Kashmir

Pisidium ( Odhnerpisidium )
atkinsonianum (Theobald)

Shell medium, orbiculately ovate, dorsal margin
slightly sloping with well-marked shoulder on
the posterior slope; anterior margin sub-truncate

Jongla Lakes at an altitude of ~ 10,000 ft,
large lakes

Manipur: Senapati;
Meghalaya: Khasi Hill (East),
Jaiantia Hills; Sikkim, West
Bengal: Darjeeling

Pisidium ( Odhnerpisidium ) kuiperi
(Dance)

Shell thin, semitransparent; umbones broad,
central, not prominent; dorsal margin with a
steeper slope posteriorly; ventral margin almost
straight; sculpture with fi ne striae

Mud dwellers Sikkim

Sphaerium austeni (Prashad) Shell thick, elongately ovate, subequilateral,

opaque, swollen; umbone prominent

Hill streams Manipur, Nagaland

Sphaerium indicum (Deshayes) Shell small, ovately rhomboid, unequilateral

with fi ne concentric striae; right valve with a
well- developed cardinal

Plains and hill streams Throughout India

Sphaerium kashmirensis (Prashad) Shell subquad rare, subequilateral, swollen,

umbone prominent, incurved and tumid,
sculptured with well-marked closely situated
concentric striae

Walur Laker at an altitude of 5,180 ft and
0.5-10 m depth.

Kashmir