In anatomy, an apex (adjectival form: apical) is part of the shell of a mollusk. The apex is the pointed tip (the oldest part) of the shell of a gastropod...

wing Apex (mollusc), the tip of the spire of the shell of a gastropod Shoot apex, the apical meristem of a plant or its remnant on a flower Root apex (botany)...

A spire is a part of the coiled shell of molluscs. The spire consists of all of the whorls except for the body whorl. Each spire whorl represents a rotation...

whorls formed within the egg, and constituting the apex of the shell Protoconch—a larval shell of a mollusc; also refers to protoconch whorls of an adult shell...

malacologists mollusc shell, seashell gastropod shell, conch, conch (instrument) protoconch apex (mollusc) spire (mollusc) planispiral sculpture (mollusc) lira...

Sculpture running parallel to the axis of coiling, an imaginary line through the apex of a shell about which the whorls are coiled. These are markings which extend...

molluscs in the family Gadilidae. Shell decidedly curved; more or less swollen near the middle or toward the aperture; more tapering toward the apex;...

shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical...

The aperture is an opening in certain kinds of mollusc shells: it is the main opening of the shell, where the head-foot part of the body of the animal...

posterior parts by the terminal sulcus, which is a "V"-shaped groove. The apex of the terminal sulcus is marked by a blind foramen, the foramen cecum, which...

found at depths up to 183 m; small ovate white shell, narrowing toward the apex; sunken spire; body whorl has spiral grooves at the edges; narrow aperture...

species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. Subspecies Amastra magna balteata Hyatt & Pilsbry...

worldwide distribution and are the only class of exclusively infaunal marine molluscs. Shells of species within this class range in length 0.5–18 cm (0.20–7...

the Friendliest: Natural selection for hypersocial traits enabled Earth's apex species to best Neandertals and other competitors". Scientific American....

(also spelled baler), is a very large edible sea snail, a marine gastropod mollusc in the family Volutidae, the volutes. The distribution of this species...

above, and correspondingly concave beneath, with a membranous margin. The apex or nucleus is at the posterior margin but inclined towards the left side...

pecten is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Facelinidae. The type locality for Phyllodesmium pecten is...

nucleola is a species of land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. The length of the shell attains 11¼ mm, its diameter...

Atlantic species of scallop, an edible saltwater clam, a marine bivalve mollusc in the family Pectinidae. This is the type species of the genus. This species...

food enters the oesophagus. The radula is unique to molluscs, and is found in every class of mollusc apart from bivalves. Within the gastropods, the radula...

species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. Subspecies Amastra antiqua antiqua (Baldwin,...

half vertically, or viewed as an X-ray image. The columella runs from the apex of the shell to the midpoint of the undersurface of the shell, or the tip...

species like Shonisaurus had robust sectorial teeth with gut contents of mollusc shells and vertebrates. Ichthyotitan is believed to have been a predator...

mollusc of the family Mesodesmatidae, endemic to New Zealand. The pipi is a shellfish with a solid white, elongated symmetrical shell with the apex at...

littorea) is a species of small edible whelk or sea snail, a marine gastropod mollusc that has gills and an operculum, and is classified within the family Littorinidae...

is well characterized by its violaceous hue with light striae, a purplish apex, and yellowish earliest neanic whorls, with a purple interior. In some cases...

molluscs such as gastropods, bivalves, brachiopods and cephalopods. Known molluscivores include numerous predatory (and often cannibalistic) molluscs...

species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. Subspecies: Amastra cyclostoma cyclostoma (Baldwin...

molluscs are made of calcium carbonate (the main constituent of limestone and chalk), and of conchiolin, a protein. For more information, see Mollusc...

PMID 16355206. Mapes, R. H.; Nützel, Alexander (2009). "Late Palaeozoic mollusc reproduction: cephalopod egg-laying behavior and gastropod larval palaeobiology"...