Über das Genus Parachordodes camerano 1897 nebst allgemeinen Angaben über die Familie Chordodidae

Heinze, Kurt

doi:10.1007/bf02121327

Cited by 9 publications

(4 citation statements)

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Section: Discussionsupporting

confidence: 53%

“…Both CO1 and ribosomal molecular data support the expected placement of P. diblastus within the family Chordodidae but outside the subfamily Chordodinae, which includes only species without bilobed male posterior ends (Heinze, 1935;Bleidorn et al 2002;Schmidt-Rhaesa, 2013). Euchordodes nigromaculatus was confirmed as belonging to Chordodinae using both mitochondrial and ribosomal datasets as shown by Bleidorn et al (2002) and as classically defined due to its lack of tail lobes.…”

Section: Nematomorph Systematics and Cryptic Speciessupporting

confidence: 57%

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Intra- and interspecific genetic diversity of New Zealand hairworms (Nematomorpha)

et al. 2017

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Hairworms (Nematomorpha) are a little-known group of parasites, and despite having been represented in the taxonomic literature for over a century, the implementation of molecular genetics in studies of hairworm ecology and evolution lags behind that of other parasitic taxa. In this study, we characterize the genetic diversity of the New Zealand nematomorph fauna and test for genetic structure within the most widespread species found. We provide new mitochondrial and nuclear ribosomal sequence data for three previously described species from New Zealand: Gordius paranensis, Parachordodes diblastus and Euchordodes nigromaculatus. We also present genetic data on a previously reported but undescribed Gordius sp., as well as data from specimens of a new Gordionus sp., a genus new for New Zealand. Phylogenetic analyses of CO1 and nuclear rDNA regions correspond with morphological classification based on scanning electron microscopy, and demonstrate paraphyly of the genus Gordionus and the potential for cryptic species within G. paranensis. Population-level analyses of E. nigromaculatus showed no genetic differentiation among sampling locations across the study area, in contrast to previously observed patterns in known and likely definitive hosts. Taken together, this raises the possibility that factors such as definitive host specificity, intermediate host movement, and passive dispersal of eggs and larvae may influence host-parasite population co-structure in hairworms.

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Section: Discussionsupporting

confidence: 53%

Section: Nematomorph Systematics and Cryptic Speciessupporting

confidence: 57%

Intra- and interspecific genetic diversity of New Zealand hairworms (Nematomorpha)

et al. 2017

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“…The justification for separation of Gordionus and Parachordodes, as originally proposed by Mueller (1927) and interpreted by Heinze (1941), Hyman (1951), and Pennak (1989), rests on differences in the areoles and presence (in a few forms of Gordionus) of adhesive warts in place of some hair-like processes in the cloaca1 region. North American species which had been placed in Gordionus by Heinze (1935) differ markedly in the gross morphology of the male posterior and areoles from the European species traditionally in Parachordodes (s.1.). If Gordionus is a recognizable group according to the definition of Mueller (1927) then all North American species exclusive of P. lineatus and P. violaceus, following convention, would belong to a different genus altogether.…”

Section: Discussionmentioning

confidence: 94%

Observations on the morphology and taxonomy of two Parachordodes species (Nematomorpha, Gordioida, Chordodidae) in southern New England (USA)

Smith

1991

Journal of Zoology

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With 4 plates in the text) Two nematomorph species are recorded from New England and described: Parachordodes lineatus, a little-known North American species, and P. ciolaceus, a European species not previously verified for North America. The identity and species status of P. lineatus is firmly established and the presence of P. i.ioluceus in North America is confirmed. Description is based both on light microscopy, which is found to be sufficient to distinguish the two species of Parachurdodes, and scanning electron microscopy, which is necessary to elucidate details of cuticle structure and male posterior morphology. The status of the genus Gordionus in North America and the practice of splitting genera within the Gordioida are discussed.

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“…Paragordionus is a problematic genus. In the original characterization, Heinze (1935) includes megareoles as being present. Clear megareoles in large clusters (Fig.…”

Section: Genus ‘Paragordionus’ Heinze 1935mentioning

confidence: 99%

Are the genera of Nematomorpha monophyletic taxa?

Schmidt‐Rhaesa¹

2002

Zoologica Scripta

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Twenty‐two genera of horsehair worms (Nematomorpha) have been described to date, one (Nectonema) from the marine environment and the remaining ones (taxon Gordiida) from freshwater. The aim of this investigation was to test whether the genera represent monophyletic taxa or are likely to be paraphyletic assemblages. The recognition and delimitation of monophyletic taxa are prerequisites for further systematic analyses. From the 15 nematomorph genera containing more than one species, autapomorphies can be found for five genera (Chordodes, Nectonema, Beatogordius, Acutogordius, Noteochordodes). In three further genera (Paragordius, Parachordodes, Gordionus), the evaluation of characters as autapomorphies is likely, but relies on further investigations. For seven genera (‘Gordius’, ‘Paragordionus’, ‘Euchordodes’, ‘Neochordodes’, ‘Pseudochordodes’, ‘Spinochordodes’, ‘Digordius’), no autapomorphy could be found. Five genera (‘Digordius’, Lanochordodes, Progordius, Pantachordodes, Pseudogordius) are likely to be synonymous with other genera, and one genus (Chordodiolus) has been synonymized with Beatogordius recently. The importance of high quality documentation of characters in investigations of nematomorph species is stressed.

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Über das Genus Parachordodes camerano 1897 nebst allgemeinen Angaben über die Familie Chordodidae

Cited by 9 publications

References 0 publications

Intra- and interspecific genetic diversity of New Zealand hairworms (Nematomorpha)

Intra- and interspecific genetic diversity of New Zealand hairworms (Nematomorpha)

Observations on the morphology and taxonomy of two Parachordodes species (Nematomorpha, Gordioida, Chordodidae) in southern New England (USA)

Are the genera of Nematomorpha monophyletic taxa?

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