NATICA
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| Top view (Left) and Front View (Right) of a typical Natica Shell |
INTRODUCTION
Natica is a genus of small to medium-sized predatory sea snails and marine gastropods in the subfamily of Naticidae. It is characterised by its globular shape, large aperture and prominent umbilicus with callus.
SCIENTIFIC CLASSIFICATION
Kingdom - Animalia
Phylum - Mollusca
Class - Gastropoda
Sub-class - Caenogastropoda
Order - Littorinimorpha
Family - Naticidae
Subfamily - Naticidae
Genus - Natica
SHELL CHARACTERS
Shell Form - Globular
Coiling - Conispiral, Dextral
Spire angle - Low
Suture - Horizontal
Axial Characters - Perforate, umbilicus partly obscured by callus
Aperture - Semi-lunar shaped, large
Peristome - Holostomatus, entire
Nature of outer lip - Sharp
External ornamentation - Smooth, variably coloured.
GEOLOGICAL AGE
Triassic to Present
TYPE LOCALITY IN INDIA
Inter-trappean beds of the Deccan plateau.
Ref - Paleontology Practical Manual, by Dr V Manivannan, Dept of Geology, GAC, Salem.
Fossils in Earth Sciences, by Anis Kumar Ray
Wikipedia
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