Biology and Ecology of Scallop Larvae

Cragg, Simon M.

doi:10.1016/b978-0-444-62710-0.00002-x

Cited by 17 publications

(14 citation statements)

References 229 publications

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“…In L. pedicellatus , the anterior adductor is formed early in larval development, and at that stage is the only muscle capable of closing the shell (Table 1). It is divided into two distinct parts, similar to the pteriomorph Pecten maximus and the heterodont Dreissena polymorpha [21,24,29]. The anterior adductor in L. pedicellatus remains smaller than the posterior adductor.…”

Section: Discussionmentioning

confidence: 99%

“…The anterior adductor in L. pedicellatus remains smaller than the posterior adductor. While the posterior adductor is a single muscle bundle in scallop larvae, it splits into two parts in O. edulis , and is divided into several bundles in the heterodont D. polymorpha ([21,23,29]). In L. pedicellatus the posterior adductor muscle appears to be divided into multiple units.…”

Section: Discussionmentioning

confidence: 99%

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Developmental dynamics of myogenesis in the shipworm Lyrodus pedicellatus (Mollusca: Bivalvia)

et al. 2014

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BackgroundThe shipworm Lyrodus pedicellatus is a wood-boring bivalve with an unusual vermiform body. Although its larvae are brooded, they retain the general appearance of a typical bivalve veliger-type larva. Here, we describe myogenesis of L. pedicellatus revealed by filamentous actin labelling and discuss the data in a comparative framework in order to test for homologous structures that might be part of the bivalve (larval) muscular ground pattern.ResultsFive major muscle systems were identified: a velum retractor, foot retractor, larval retractor, a distinct mantle musculature and an adductor system. For a short period of larval life, an additional ventral larval retractor is present. Early in development, a velum muscle ring and an oral velum musculature emerge. In late stages the lateral and dorsal mantle musculature, paired finger-shaped muscles, an accessory adductor and a pedal plexus are formed. Similar to other bivalve larvae, L. pedicellatus exhibits three velum retractor muscles, but in contrast to other species, one of them disappears in early stages of L. pedicellatus. The remaining two velum retractors are considerably remodelled during late larval development and are most likely incorporated into the elaborate mantle musculature of the adult.ConclusionsTo our knowledge, this is the first account of any larval retractor system that might contribute to the adult bodyplan of a (conchiferan) mollusk. A comparative analysis shows that a pedal plexus, adductors, a larval velum ring, velum retractors and a ventral larval retractor are commonly found among bivalve larvae, and thus most likely belong to the ground pattern of the bivalve larval musculature.Electronic supplementary materialThe online version of this article (doi:10.1186/s12983-014-0090-9) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Developmental dynamics of myogenesis in the shipworm Lyrodus pedicellatus (Mollusca: Bivalvia)

et al. 2014

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“…Em muitos bivalves, como no caso de Pectinidae e outras famílias, o véu regride e o pé se desenvolve originando o estádio denominado pedivéliger, caracterizando a transição do hábito larval planctônico para o bentônico Cragg & Crisp, 1991). Uma vez associada ao substrato, a larva sofre metamorfose, conduzindo à gênese dos órgãos internos (como os ctenídios), dissoconcha e demais estruturas componentes do animal adulto (Raven, 1958;Cragg & Crisp, 1991 Silberfeld & Gros, 2006;Wassnig & Southgate, 2012). Já os órgãos e demais estruturas internas, como trato digestivo e ctenídios, foram brevemente consideradas em poucos estudos de anatomia geral (e.g., Le Pennec, 1974;.…”

Section: Desenvolvimento Em Bivalviaunclassified

“…Especificamente para Bivalvia, segundo Cragg & Crisp (1991), a borda do manto possui muitas questões em aberto, especialmente quanto à sua organização e relação entre os distintos estádios ao longo do desenvolvimento.…”

Section: Desenvolvimento Em Bivalviaunclassified