Molluscan Research 27(3):
111-122; published 31 Oct. 2007
Copyright © The
Malacological Society of Australasia
Radular morphology of Conus (Gastropoda:
Caenogastropoda: Conidae) from India
FRANKLIN, 1, 3 S. ANTONY FERNANDO, 1 B. A.
CHALKE, 2 K.
S. KRISHNAN. 2, 3*
of Advanced Study in Marine Biology, Annamalai University,
Parangipettai-608 502, Cuddalore, Tamilnadu, India.
Institute of Fundamental Research, Homi Bhabha Road, Colaba,
Mumbai-400 005, India.
Centre for Biological Sciences, TIFR, Old Bellary Road, Bangalore-560
065, India.* Corresponding author E-mail: (K. S. Krishnan): firstname.lastname@example.org.
Radular morphologies of 22
species of the genus Conus from Indian coastal waters were
analyzed by optical and scanning electron microscopy. Although the
majority of species in the present study are vermivorous, all three
feeding modes known to occur in the genus are represented. Specific
radular-tooth structures consistently define feeding modes. Species
showing similar feeding modes also show fine differences in radular
structures. We propose that these structures will be of value in
species identification in cases of ambiguity in other characteristics.
Examination of eight discrete radular-tooth components has allowed us
to classify the studied species of Conus into three groups. We
see much greater inter-specific differences amongst vermivorous than
amongst molluscivorous and piscivorous species. We have used these
differences to provide a formula for species identification. The
radular teeth of Conus araneosus, C. augur, C. bayani, C. biliosus,
C. hyaena, C. lentiginosus, C. loroisii, and C. malacanus are
illustrated for the first time. In a few cases our study has also
enabled the correction of some erroneous descriptions in the
words: cone snail, taxonomy,
radula, scanning electron microscopy, feeding modes.
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