Endosacculus moltkiae n. g. n. sp., ein vermutlicher fossiler Ascothoracide (Entomostr.) als Cystenbildner bei der OktokoralleMoltkia minuta

Voigt, Ehrhard

doi:10.1007/bf02987935

Cited by 22 publications

(14 citation statements)

References 4 publications

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“…In that event, the separation of the Acrothoracica, Rhizocephala and Thoracica must have taken place previous to the time horizon of Priscansermarinus †. The known record of the outgroups in our analysis, Devonian for Acrothoracica (Rodriguez & Gutschick, 1977) and possibly Cretaceous for Ascothoracida (Voigt, 1959(Voigt, , 1967Madsen & Wolff, 1965) contributes little to timing this event. However, a Cambrian origin of the Cirripedia agrees well with the view (Mü ller & Walossek, 1988;Walossek, 1993) that the Upper Cambrian Bredocaris † from the Swedish 'Orsten' possibly belongs to the Thecostraca and represents the sister group to all other members of that monophylum.…”

Section: Ontogeny and Palaeontologymentioning

confidence: 78%

Cladistic analysis of the Cirripedia Thoracica

Glenner

Grygier

Høeg

et al. 1995

Zoological Journal of the Linnean Society

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We present a cladistic analysis of the Cirripedia Thoracica using morphological characters and the Acrothoracica and Ascothoracida as outgroups. The list of characters comprised 32 shell and soft body features. The operational taxonomic units (OTUs) comprised 26 well‐studied fossil and extant taxa, principally genera, since uncertainty about monophyly exists for most higher ranking taxonomic units. Parsimony analyses using PAUP 3.1.1 and Hennig86 produced 189 trees of assured minimal length. We also examined character evolution in the consensus trees using MacClade and Clados. The monophyly of the Balanomorpha and the Verrucomorpha sensu stricto is confirmed, and all trees featured a sister group relationship between the ‘living fossil Neoverruca and me Brachylepadomorpha. In the consensus trees the sequential progression of ‘pedunculate‘sister groups up to a node containing Neolepas also conforms to current views, but certain well‐established taxa based solely on plesiomorphies stand out as paraphyletic, such as Pedunculata (= Lepadomorpha); Eolepadinae, Scalpellomorpha and Chthamaloidea. The 189 trees differed principally in the position of shell‐less pedunculates, Neoverruca, the scalpelloid Capitulum, and the interrelationships within the Balanomorpha, although the 50% majority rule consensus tree almost fully resolved the latter. A monophyletic Sessilia comprising both Verrucomorpha and Balanomorpha appeared among the shortest trees, but not in the consensus. A tree with a monophyletic Verrucomorpha including Neoverruca had a tree length two steps longer than the consensus trees. Deletion of all extinct OTUs produced a radically different tree, which highlights the importance of fossils in estimating cirripede phylogeny. Mapping of our character set onto a manually constructed cladogram reflecting die most recent scenario of cirripede evolution resulted in a tree length five steps longer than any of our shortest trees. Our analysis reveals that several key questions in cirripede phylogeny remain unsolved, notably the position of shell‐less forms and the transition from ‘pedunculate‘to ‘sessile‘barnacles. The inclusion of more fossil species at this point in our understanding of cirripede phylogeny will only result in even greater levels of uncertainty. When constructing the character list we also identified numerous uncertainties in the homology of traits commonly used in discussing cirripede evolution. Our study highlights larval ultrastructure, detailed studies of early ontogeny, and molecular data as the most promising areas for future research.

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Section: Ontogeny and Palaeontologymentioning

confidence: 78%

Cladistic analysis of the Cirripedia Thoracica

Glenner

Grygier

Høeg

et al. 1995

Zoological Journal of the Linnean Society

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“…Subsequently, Voigt (1967) found further Late Cretaceous evidence for infestation of octocorals, presumably by an ascothoracidan, and a cyst in the early Palaeocene (Danian) hydrocoral Astya crassus was suggested to have been produced by parasitic crustaceans (either copepods or ascothoracidans) by Bernecker and Weidlich (2005), although their photograph (Figure 7(c-1)) does not allow identification of the parasitic structure. Voigt (1959) was of the opinion that his examples did not represent parasitism because the host was not particularly damaged and continued to grow after infestation. He considered it did not represent a true endoparasite deriving its food from the host; rather, he suggested that commensalism or 'syn€ okie' (inhabitation of host and taking part in meals of the host sensu K€ orner, 1979) was more appropriate.…”

Section: Crustaceans As Parasites Of Non-crustacean Hostsmentioning

confidence: 97%

“…Voigt (1959) first recognized galls or cysts named Endosacculus moltkiae in the Late Cretaceous octocoral Moltkia minuta that were attributed to ascothoracidans because of morphological similarity to cysts of modern representatives. Moyse (1983), for example, showed morphologically similar galls on modern octocorals.…”

Section: Crustaceans As Parasites Of Non-crustacean Hostsmentioning

confidence: 98%

Fossil Crustaceans as Parasites and Hosts

Klompmaker

Boxshall

2015

Fossil Parasites

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“…Closest affinity within the family is to the genera Synagoga Norman and Gorgonolaureus Utinomi but mention must also be made of Endosacculus moltkiae (Voigt, 1959) thought by the describer to belong here also.…”

Section: Gall Structurementioning

confidence: 86%

Isidascus bassindaleigen.nov., sp.nov. (Ascothoracida: Crustacea) from north-east Atlantic with a note on the origin of barnacles

Moyse

1983

J. Mar. Biol. Ass.

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A new ascothoracid, Isidascus bassindalei gen.nov., sp.nov., has been discovered in the north-east Atlantic Ocean at a depth of over 2000 m. It forms permanent galls on the branches of Acanella arbuscula, a gorgonian of the Family Isidae (Octocorallia, Coelenterata). The new genus is related to Gorgonolaureus, species of which form galls on paramuriceid gorgonians. The gall of the present form unlike that of Gorgonolaureus incorporates a cup of host calcite. Twenty-three adult female specimens and one male were examined in this study. The adult parasite is characterized by elevated humps in a median dorsal position on each of thoracomeres 2,3 and 4. A further feature is a tapering filamentary appendage arising near the base of first thoracopod. The parasite apparently feeds on its host's coenosarc. The likely function of the first and second antennae and each of the three pairs of stylet-form mouth parts is suggested. A case is made for interpretting the species as a protandrous sequential hermaphrodite. Whilst still immature, protanders apparently seek out and settle alongside an adult female. Later, following growth and sexual maturation they again become mobile and after copulation with the nearby female depart to prepare for sex change on a separate branch of the host.

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Endosacculus moltkiae n. g. n. sp., ein vermutlicher fossiler Ascothoracide (Entomostr.) als Cystenbildner bei der OktokoralleMoltkia minuta

Cited by 22 publications

References 4 publications

Cladistic analysis of the Cirripedia Thoracica

Cladistic analysis of the Cirripedia Thoracica

Fossil Crustaceans as Parasites and Hosts

Isidascus bassindaleigen.nov., sp.nov. (Ascothoracida: Crustacea) from north-east Atlantic with a note on the origin of barnacles

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