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Wentletrap shells have a roundish or oval aperture, but its inner lip is often reduced to strip of callus. The round and horny operculum is paucispiral and fits the aperture tightly. Most of the species in the family are small to minute, although some are larger, and overall the adult shell length in the family varies between 0.6 and 11.7 cm. [ 4 ]
When the word "seashells" refers only to the shells of marine mollusks, then studying seashells is part of conchology.Conchologists or serious collectors who have a scientific bias are in general careful not to disturb living populations and habitats: even though they may collect a few live animals, most responsible collectors do not often over-collect or otherwise disturb ecosystems.
The shells have an elongated aperture in their first whorl and an inner lip characterised by a number of deep plaits. The family of Volutidae comprises a suite of large shells remarkable for their great beauty and elegance of form. The shell of species such as Melo amphora can grow as large as 50 cm (19.7 inches) in length. [2]
The Scotch bonnet (Semicassis granulata) is a medium-sized to large species of sea snail, a marine gastropod mollusk in the subfamily Cassinae, the helmet shells and bonnet shells. The common name "Scotch bonnet" alludes to the general outline and color pattern of the shell, which vaguely resemble a tam o' shanter , a traditional Scottish ...
An account of some of the marine shells of the United States. Journal of the Academy of Natural Sciences of Philadelphia 2: 221-248, 257-276, 302-325. Reeve, L. 1850. Monograph of the genus Fissurella. Conchologia Iconica 6: pls. 9-16; Turgeon, D.D., et al. 1998. Common and scientific names of aquatic invertebrates of the United States and Canada.
Mollusc shells (especially those formed by marine species) are very durable and outlast the otherwise soft-bodied animals that produce them by a very long time (sometimes thousands of years even without being fossilized). Most shells of marine molluscs fossilize rather easily, and fossil mollusc shells date all the way back to the Cambrian period.
Several shells of Trochia cingulata ... Marais A.P. & Seccombe A.D. (eds), Identification guide to the seashells of South Africa. Volume 1. ...
Muricidae is a large and varied taxonomic family of small to large predatory sea snails, marine gastropod mollusks, commonly known as murex snails or rock snails.With over 1,700 living species, the Muricidae represent almost 10% of the Neogastropoda.