A veliger is the planktonic larva of many kinds of sea snails and freshwater snails, as well as most bivalve molluscs (clams) and tusk shells. The veliger is the characteristic larva of the gastropod, bivalve and scaphopod taxonomic classes. It is produced following either the embryonic or trochophore larval stage of development.

veliger, larva typical of certain mollusks such as marine snails and bivalves and a few freshwater bivalves. The veliger develops from the trochophore (q.v.) larva and has large, ciliated lobes (velum). The velum forms from the ciliary ring (prototroch), a …

Figures 1 and 2 are sketches of a gastropod larva in the 2nd larval stage, or veliger, of some species of snail. They hatch at sea and can spend anywhere from days to months floating among other plankton as they grow and develop ( Craig M. Young et al. ).

2020年11月11日 · The basic gastropod life cycle starts with fertilization and moves through the stages of embryo, trochophore larva, veliger larva and juvenile before becoming an adult. The step from veliger larva to juvenile is a true metamorphosis. In some species, scientists observe additional named stages across the embryo stage.

2013年4月5日 · "Ballad of the Veliger", or "How the Gastropod got its Twist" by Walter Garstang, 1928 . The Veliger's a lively tar, the liveliest afloat, A whirling wheel on either side propels his little boat; But when the danger signal warns his bustling submarine, He stops the engine, shuts the port, and drops below unseen.

2001年1月1日 · The veliger, arising from the ubiquitous trochophore larva, probably emerged as a typical feature of the biphasic molluskan life cycle within the Monoplacophora, subsequently becoming the dominant larval phase of the Phylum Molluska.

The meaning of VELIGER is a larval mollusk in the stage when it has developed the velum.

A trochophore is a type of free-swimming planktonic marine larva with several bands of cilia. It is characteristic of most mollusks and annelids. A veliger is the planktonic larva of many kinds of sea snails and freshwater snails, as well as most bivalve mollusks (clams) and tusk shells.

Veliger is the second stage of a larva of certain mollusks such as marine snails and bivalves and a few freshwater bivalves. The veliger is developed from the trochophore larva, which has large ciliated lobes called velum.

Veligers are planktonic larvae of many bivalve and gastropod molluscs characterized by a shell, foot, and velum (a lobed, ciliated structure used for swimming and feeding). The velum is derived from the prototroch - a pre-oral ciliated band in the trochophore larva. A dorsal shell gland secretes the shell of the veliger.