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Syrinx aruanus, common name the Australian trumpet or false trumpet, is a species of extremely large sea snail measuring up to 75 cm long and weighing up to 18 kg. It is a marine gastropod mollusk in the family Turbinellidae, and is the only species in the genus Syrinx.
Charonia tritonis, common name the Triton's trumpet, the giant triton or pū [1] is a species of very large sea snail, a marine gastropod mollusc in the family Charoniidae, the tritons. [2] Reaching up to two feet (or 60 cm) in shell length this is one of the biggest mollusks in the coral reef.
The shell of Stenotrema florida, a land snail or terrestrial gastropod.The periostracum of this species has minute hairs, giving the snail a velvety feel A yellowish tan periostracum is visible on the lower two thirds of this juvenile (8 cm) valve of the marine bivalve Spisula solidissima The dark periostracum is flaking off of this dried-out valve of the "ocean quahog", marine bivalve Arctica ...
Gastropods have the greatest numbers of named mollusk species. However, estimates of the total number of gastropod species vary widely, depending on cited sources. The number of gastropod species can be ascertained from estimates of the number of described species of Mollusca with accepted names: about 85,000 (minimum 50,000, maximum 120,000). [9]
Viviparidae, sometimes known as the river snails or mystery snails, are a family of large aquatic gastropod mollusks, being some of the most widely distributed operculate freshwater snails. This family is classified in the informal group Architaenioglossa according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 .
Two neogastropods, Brunneifusus ternatanus (left) and Murex trapa (right) in captivity. The available fossil record of Neogastropoda is relatively complete, and supports a widely accepted evolutionary scenario of an Early Cretaceous origin of the group followed by two rapid diversification rounds in the late Cretaceous and the Paleocene.
Some aquatic gastropods possess a single row of filaments on their ctenidium, known as the monopectinate condition, [3] and others have a pair of filament rows, known as the bipectinate or aspidobranch condition. [6] The ctenidium hangs into the mantle cavity and increases the area available for gas exchange. [7]
Cerithidea is a genus of medium-sized sea snails or mud snails, marine gastropod mollusks in the family Potamididae, the horn snails. [2] Species