Anatomy Laevistrombus canarium

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illustration of external morphology of l. canarium, manual of conchology (1885)


laevistrombus canarium has heavy shell rounded outline. shell length of adult specimens 29 mm (1.1 in) 71 mm (2.8 in). outer surface of shell smooth, except barely visible spiral lines , occasional varices on spire. unlike species in genus strombus, stromboid notch on outer lip inconspicuous. when normal adult dextral shell of species viewed ventrally (with anterior end pointing downwards), stromboid notch can observed right of siphonal canal shallow, secondary anterior indentation in lip. siphonal canal straight, short , ample; columella smooth, without folds. adult specimens have moderately flared, posteriorly protruding outer lip, considerably thickened , devoid of marginal spikes or plicae. body whorl roundly swollen @ shoulder, few anterior spiral grooves. shell has medium-to-high cone-shaped spire, @ least 5 delicately furrowed whorls.


shell colour variable, golden yellow light yellowish-brown grey. underside of shell dark; more paler top, or totally white. in cases, shell aperture white. mature specimens have metallic-grey or golden-brown gloss on margin of outer lip , callus. zigzag network of darker lines present on outside of shell. periostracum, layer of protein (conchiolin) outermost part of shell surface, yellowish-brown. thick, reticulated (net-like) , fimbriated (fringed) on suture. corneous operculum dark brown, , shape typical of family strombidae: bent sickle, 7 8 weak lateral serrations.


soft parts

female individuals of laevistrombus canarium larger (both shell , soft parts) male individuals, case in other strombid gastropods such spider conch (harpago chiragra) , queen conch (lobatus gigas). external anatomy of soft parts of species similar of other members of family: animal has long extensible snout , thin eyestalks (also known ommatophores), well-developed lens eyes @ tips. each eyestalk has small sensory tentacle branching off near end. large foot of animal narrow , strong, able perform leaping form of locomotion found in other species of strombidae (such queen conch).









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