Les copépodes parasites de mollusques

Monod, Théodore; Dollfus, Robert-Ph.

doi:10.1051/parasite/1932102129

Cited by 24 publications

(28 citation statements)

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“…The family Mytilicolidae was established by Bocquet & Stock (1957a, b) to include the genera Mytilicola Steuer, Trochicola Dollfus & Piratasta Leigh‐Sharpe. Monod & Dollfus (1932) described the genus Cerastocheres and placed it in the Lernaeidae but Boxshall & Halsey (2004) recognized it is a member of the Mytilicolidae. Known records demonstrate that mytilicolids are typically parasites of bivalve molluscs although some species of Mytilicola (Ho & Kim, 1992) and Trochicola (Dollfus, 1914; Bocquet & Stock, 1957a) have been reported from trochid gastropods (topshells).…”

Section: Discussionmentioning

confidence: 99%

“…Early workers (Steuer, 1903; Pesta, 1907; Caspers, 1939; Costanzo, 1960) identified the third cephalic limb in M. intestinalis as the mandible and, based on the position of the maxillary gland opening, homologized the fourth limb with the maxilla, thus implying that the maxillule was absent. Dollfus (1914) initially arrived at the same serial arrangement for T. entericus but later (Monod & Dollfus, 1932) concluded that the mandible is absent in all copepodid stages, the reduced third cephalic limb being the homologue of the maxillule. The absence of the mandible was confirmed by Bocquet & Stock (1957a, b), who claimed that this condition was diagnostic for all mytilicolid genera.…”

Section: Discussionmentioning

confidence: 99%

“…utilizes a wide range of hosts but only Obesiella lyonsiellae Ridewood and some species of the genus Scottocheres Giesbrecht are known to be associated with molluscs (Ridewood, 1903; Norman & Scott, 1906). Records of Artotrogus Boeck (Artotrogidae) using nudibranch gastropods (Monod & Dollfus, 1932) are anecdotal in nature and require confirmation. The Indo‐Pacific Anchicaligus nautili Willey is parasitic on the deep‐water nautiloid Nautilus pompilus Linn.…”

Section: Introductionmentioning

confidence: 99%

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Small subunit rDNA and Bayesian inference reveal Pectenophilus ornatus (Copepoda incertae sedis) as highly transformed Mytilicolidae, and support assignment of Chondracanthidae and Xarifiidae to Lichomolgoidea (Cyclopoida)

Huys¹,

Llewellyn-Hughes²,

Olson³

et al. 2006

Biological Journal of the Linnean Society

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Phylogenetic analysis of newly obtained data from the complete small subunit rDNA (18S) nuclear gene of a wide range of copepods placed the enigmatic Pectenophilus ornatus firmly in the Cyclopoida. Both maximum parsimony tree reconstruction, and Bayesian analysis operating under the GTR + I + Γ model of nucleotide substitution, gave identical solutions and placed P. ornatus at the base of the poecilostome families, in apposition to the mytilicolid taxa. The recently suggested assignment to the Siphonostomatoida on the basis of a tubular mouth cone in the pygmy male was rejected not only by the molecular data but also by new morphological observations. Scanning electron microscopy revealed that the appendage previously interpreted as the mandible was in reality the maxilla, the presumptive 'labium' only an intermaxillary outgrowth of the ventral cephalic sclerite bearing the widely separated paragnaths, and that there was no basal fusion between the labrum and the 'posterior lip' as in genuine siphonostomatoids. Absence of mandibles and their functional replacement by the anteriorly displaced maxillae is a unique and robust apomorphy for the Mytilicolidae and placed unequivocally P. ornatus in that family. The morphology of male Pectenophilus probably evolved as a result of global progenesis, involving early sexual maturation at the metanauplius stage and the complete cessation of somite and limb development. The molecular data were also employed to examine the relationships of two other highly modified parasitic families, the Xarifiidae (inhabiting hard corals) and the Chondracanthidae (parasitic on marine demersal fishes). Our analyses rejected the previously proposed relationship between Xarifiidae and Vahiniidae and strongly supported an Anchimolgidae + (Rhynchomolgidae + Xarifiidae) clade as sister group to the Sabelliphilidae within a monophyletic Lichomolgoidea. The obtained topology suggests that the common ancestor of this clade had already established a symbiotic relationship with scleractinian corals and that host switching occurred only secondarily in the Rhynchomolgidae, involving predominantly other cnidarian and occasionally noncnidarian hosts. Reassessment of the morphology of Parangium provided new evidence for a relationship with the xarifiids, rendering its current position in the Serpulidicolidae extremely unlikely. Both parsimony and Bayesian analyses revealed an unexpected but strongly supported relationship between the Chondracanthidae and Pseudanthessiidae. This result contrasts with earlier views advocating affinity to the Synapticolidae or Lichomolgidae, but was congruent with the previously unnoticed morphological similarity in antennary armature patterns in the first copepodid stage. The morphological grounds used to establish the Lernaeosoleidae were shown to be secondarily derived characters shared with one or several chondracanthid genera. Particularly the similarity between the Lernaeosoleidae and Markevitchielinus demonstrated that the former evolved from a mesoparasitic ancestor w...

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Small subunit rDNA and Bayesian inference reveal Pectenophilus ornatus (Copepoda incertae sedis) as highly transformed Mytilicolidae, and support assignment of Chondracanthidae and Xarifiidae to Lichomolgoidea (Cyclopoida)

Huys¹,

Llewellyn-Hughes²,

Olson³

et al. 2006

Biological Journal of the Linnean Society

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“…Several times the copepod has been mentioned by name only (Pelseneer 1929;Monod andDollfus 1932, 1934; Can. J. Zool.…”

Section: Previous Collections Of Myicola Metisiensismentioning

confidence: 99%

Myicola metisiensis (Copepoda: Poecilostomatoida), a parasite of the bivalve Mya arenaria in eastern Canada, redefinition of the Myicolidae, and diagnosis of the Anthessiidae n. fam.

Humes¹

1986

Can. J. Zool.

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The myicolid copepod Myicola metisiensis is redescribed from topotypes and other specimens found in Mya arenaria in Quebec and New Brunswick. The family Myicolidae comprises three closely related genera, Myicola, Ostrincola, and Pseudomyicola, all parasitic in bivalve mollusks. A new family, the Anthessiidae, includes five genera previously placed in the Myicolidae, Anthessius, Katanthessius, Neanthessius, Panaietis, and Rhinomolgus.

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“…Most records are from hosts obtained from the intertidal zone to depths reached by SCUBA diving. Although a few species were reported earlier as associates of New Caledonian opisthobranchs (Monod 1928;Risbec 1928Risbec , 1930Monod & Dollfus 1932a,b, 1934, intensive study of these copepods from a wide variety of hosts was not undertaken until 1971. At that time, the author collected material during 2months, mostly in the vicinity of NoumCa, but with additional collections at Poe near Bourail, north of NoumCa, and at YatC in southeastern New Caledonia.…”

Section: Introductionmentioning

confidence: 99%

Two new copepod genera (Poecilostomatoida) associated with the scleractinian coral Psammocora in New Caledonia

Humes¹

1997

Zoologica Scripta

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The anchimolgid copepod Paraclamocus hiulcus gen. n., sp. n., associated with the coral Psammocora togianensis near Nouméa, New Caledonia, is remarkable for the form of its mandible, with the inner margin broadly and deeply incised. The rhynchomolgid copepod Numboa porosa gen. n., sp. n., associated with Psammocora contigua, has a much flattened, discoidal prosome with many small surficial pores and lacks leg 4 and the endopod of leg 3. More than 200 species of copepods are associated with New Caledonian invertebrates, 80 of them with Scleractinia.

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Les copépodes parasites de mollusques

Cited by 24 publications

References 0 publications

Small subunit rDNA and Bayesian inference reveal Pectenophilus ornatus (Copepoda incertae sedis) as highly transformed Mytilicolidae, and support assignment of Chondracanthidae and Xarifiidae to Lichomolgoidea (Cyclopoida)

Small subunit rDNA and Bayesian inference reveal Pectenophilus ornatus (Copepoda incertae sedis) as highly transformed Mytilicolidae, and support assignment of Chondracanthidae and Xarifiidae to Lichomolgoidea (Cyclopoida)

Myicola metisiensis (Copepoda: Poecilostomatoida), a parasite of the bivalve Mya arenaria in eastern Canada, redefinition of the Myicolidae, and diagnosis of the Anthessiidae n. fam.

Two new copepod genera (Poecilostomatoida) associated with the scleractinian coral Psammocora in New Caledonia

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