Larval morphology of the brooding clam <i>Lasaea adansonii</i> (Gmelin, 1791) (Bivalvia, Heterodonta, Galeommatoidea)

Altnöder, Andreas; Haszprunar, Gerhard

doi:10.1002/jmor.10623

Cited by 20 publications

(26 citation statements)

References 29 publications

(36 reference statements)

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“…Our results and recent data from the literature (Haszprunar and Wanninger 2000;McDougall et al 2006;Altnöder and Haszprunar 2008) suggest that myogenesis in molluscs is a highly dynamic and potentially variable process. Such a "flexible" developmental program of the larval cells in M. trossulus and other species might be regarded as a prerequisite for the evolution of the wide variety of striated and smooth muscles seen in larval and adult molluscs.…”

Section: Discussionmentioning

confidence: 47%

Muscle and neuronal differentiation in primary cell culture of larval Mytilus trossulus (Mollusca: Bivalvia)

2010

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Molluscan in vitro technology allows the study of the differentiation of isolated cells undergoing experimental manipulations. We have used the immunofluorescence technique and laser scanning microscopy to investigate the organization of muscle proteins (actin, myosin, paramyosin, and twitchin) and the localization of neurotransmitters (serotonin and FMRFamide) in cultured mussel larval cells. Differentiation into muscle and neuron-like cells occurs during the cultivation of mussel cells from premyogenic and prenervous larval stages. Muscle proteins are colocalized in contractile cells through all stages of cultivation. The cultivation of mussel cells on various substrates and the application of integrin receptor blockers suggest that an integrin-dependent mechanism is involved in cell adhesion and differentiation. Dissociated mussel cells aggregate and become self-organized in culture. After 20 days of cultivation, they form colonies in which serotonin- and FMRFamide-immunoreactive cells are located centrally, whereas muscle cells form a contractile network at the periphery. The pattern of thick and thin filaments in cultivated mussel cells changes according to the scenario of muscle arrangement in vivo: initially, a striated pattern of muscle filaments forms but is then replaced by a smooth muscle pattern with a diffuse distribution of muscle proteins, typical of muscles of adult molluscs. Myogenesis in molluscs thus seems to be a highly dynamic and potentially variable process. Such a "flexible" developmental program can be regarded as a prerequisite for the evolution of the wide variety of striated and smooth muscles in larval and adult molluscs.

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Section: Discussionmentioning

confidence: 47%

Muscle and neuronal differentiation in primary cell culture of larval Mytilus trossulus (Mollusca: Bivalvia)

2010

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“…Myogenesis in bivalves has so far been investigated to a surprisingly little extent, but the few data available suggest the presence of highly complex retractor systems in their veliger larvae, also in certain semi-direct developing (brooding) species (Meisenheimer 1901 ;Altnöder and Haszprunar 2008 ;Wanninger et al 2008 ;Dyachuk and Odintsova 2009 ). An additional ventral larval retractor system is present in Dreissena , Mytilus , Pecten , and Lyrodus (shipworm) larvae (Meisenheimer 1901 ;Cragg 1985 ;Dyachuk and Odintsova 2009 ;Wurzinger-Mayer et al 2014 ), but their almost opposite projection relative to the gastropod accessory (mantle) retractor argues against homology of these muscles.…”

Section: Myogenesis In Conchiferansmentioning

confidence: 96%

Mollusca

Wanninger

Wollesen

2015

Evolutionary Developmental Biology of Invertebrates 2

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“…Likewise for positional reasons, the paired accessory foot retractor in L. pedicellatus most likely corresponds to the “anterior retractor” described for O. edulis, M. edulis, L. adansonii, P. inaequivalvis and A. cellensis [22,25,30-32] (Table 2), although most studies do not provide enough details to unequivocally settle this issue. In Pecten maximus unidentified fibres, which emerge from either end of the anterior bundle of the anterior adductor, extend along the bodywall lining [24] and, according to their position, they are likely homologous to the accessory foot retractor of L. pedicellatus .…”

Section: Discussionmentioning

confidence: 99%

“…The massive foot retractors in the larva of Lyrodus pedicellatus attach in a posterior area near the hinge and, due to their similar relative position in the larval body, are considered homologous to the posterior retractors of the pteriomorphans Ostrea edulis and Mytilus edulis, the heterodonts Lasaea adansonii and Pandora inaequivalvis and the palaeoheterodont Anodonta cellensis (the foot retractors in O. edulis have previously been described as “cruciform retractor” because their medial bundles cross the median body plane) ([22,23,25,30-32]; Table 2). Likewise for positional reasons, the paired accessory foot retractor in L. pedicellatus most likely corresponds to the “anterior retractor” described for O. edulis, M. edulis, L. adansonii, P. inaequivalvis and A. cellensis [22,25,30-32] (Table 2), although most studies do not provide enough details to unequivocally settle this issue.…”

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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Larval morphology of the brooding clam Lasaea adansonii (Gmelin, 1791) (Bivalvia, Heterodonta, Galeommatoidea)

Cited by 20 publications

References 29 publications

Muscle and neuronal differentiation in primary cell culture of larval Mytilus trossulus (Mollusca: Bivalvia)

Muscle and neuronal differentiation in primary cell culture of larval Mytilus trossulus (Mollusca: Bivalvia)

Mollusca

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

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