Environmental Engineering Reference
In-Depth Information
Assiminea francessi (Wood)
Shell elongate, apex pointed, whorls seven
rapidly increasing in the width; aperture
oblique, ovate, body whorl with three brown-
reddish spiral bands
Estuarine species with tidal infl uence; it is
found up to Barrackpore in Hugli River
West Bengal
Thiara ( Thiara ) amarula (Linnaeus)
Shell large, dark brown, spire decollated, body
whorl longer than the spire; body whorl with
crown of spines near the periphery and suture,
project upwards from shoulder, strong spiral
sculpture confi ned to the base of the shell
Creeks of tidal infl uence
Great Nicobar
Thiara ( Thiara ) rudis (Lea)
Whorls regularly increasing; sculptured with
axial ribs and strong spiral ridges forming
nodules
Prefers slow moving water
Throughout India
Thiara ( Thiara ) scabra (Mueller)
Shell with spiral ridges, sculptured with vertical
ribs bearing prominent spines directed
obliquely outward, spire almost equal to the
body whorl
Prefers slow moving water. Occurs in slow or
fast moving water as well as stagnant water
Throughout India
Thiara ( Sermyla ) riqueti (Grateloup)
Shell small, elongate, whorls 8. Regularly
increasing; sculpture with undulating axial and
spiral ridges
Kerala back water, slowly running low land
rivers and streams with rich invertebrate fauna
Kerala: Cochin, Quilon and
Trivandrum; Maharashtra:
Mumbai
Faunus ater (Linnaeus)
Shell with a long spire, 18-20 regularly
increasing, 5-6 whorls strongly striated
Water within tidal infl uence
Goa, Nicobar Islands
Melanoides crebra (Lea)
Shell sculpture with broad equidistance spiral
ridges
Estuarine water within tidal infl uence and very
low salinity
Andaman and Nicobar Islands
Melanoides nevillei (Brot)
Shell sculptures partly with spiral striae on
lower portion of whorl and well developed on
the upper whorl
Estuarine water within tidal infl uence and very
low salinity
Andaman and Nicobar Islands
Melanoides nicobarica (Reeve)
Sculpture almost smooth; spiral striae on the
upper whorls
Estuarine water within tidal infl uence and very
low salinity
Andaman and Nicobar Islands
Melanoides peddamunigalensis (Ray and
Roy Chowdhury)
Sculpture uniformly strong throughout the shell
and outer lip curved at upper angle
Slowly running low land rivers and streams and
other water bodies
Andhra Pradesh: Nalgonda;
Tamil Nadu
Melanoides tuberculata (Muller)
Sculpture with vertical ribs and spiral striae,
distinct and raised on the upper whorls, but
fl atter on the lower ones
Occurs in all possible water bodies of stagnant
and slow moving freshwater ponds, tanks,
canals, streams, ditches, drains, etc.
Throughout India except
Kashmir
Stenomelania aspirans (Hinds)
Shell very slender, spire attenuated, whorls of
the spire not folded, shell with fi ne spiral lines
throughout the body
Estuarine water within tidal infl uence and with
very low salinity
Andaman and Nicobar Islands
(continued)
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