Testing Cold Fusion of Phyla: Maternity in a Tunicate × Sea Urchin Hybrid Determined From Dna Comparisons

Hart, Michael W.

doi:10.1111/j.1558-5646.1996.tb03943.x

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…Characterization of both the maternal mitochondrial genome and the biparental nuclear genome of these offspring revealed only sea urchin genes and genomes and found no evidence of tunicate genes and genomes (27). In later books and essays, Williamson ignored the probative value of this result (e.g., ref.…”

Section: Specific Tests Of Larval Transfer By Genetic Analysis Of Expmentioning

confidence: 99%

Caterpillars did not evolve from onychophorans by hybridogenesis

Hart

Grosberg

2009

Proc. Natl. Acad. Sci. U.S.A.

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The evolution and loss of distinctive larval forms in animal life cycles have produced complex patterns of similarity and difference among life-history stages and major animal lineages. One example of this similarity is the morphological forms of Onychophora (velvet worms) and the caterpillar-like larvae of some insects. Williamson [(2009) Proc Natl Acad Sci USA 106:15786 -15790] has made the astonishing and unfounded claim that the ancestors of the velvet worms directly gave rise to insect caterpillars via hybridization and that evidence of this ancient ''larval transfer'' could be found in comparisons among the genomes of extant onychophorans, insects with larvae, and insects without larvae. Williamson has made a series of predictions arising from his hypothesis and urged genomicists to test them. Here, we use data already in the literature to show these predictions to be false. Hybridogenesis between distantly related animals does not explain patterns of morphological and life-history evolution in general, and the genes and genomes of animals provide strong evidence against hybridization or larval transfer between a velvet worm and an insect in particular.hybridization ͉ insect evolution ͉ interphyletic crosses ͉ larval transfer ͉ metamorphosis

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Section: Specific Tests Of Larval Transfer By Genetic Analysis Of Expmentioning

confidence: 99%

Caterpillars did not evolve from onychophorans by hybridogenesis

Hart

Grosberg

2009

Proc. Natl. Acad. Sci. U.S.A.

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“…(9) But in his new article, in addition to suggesting hybridization tests between living onychophorans and living cockroaches (both of which are perhaps less inclined towards this kind of performances than their Carboniferous ancestors were), Williamson indicates an indirect way to test his hypothesis. This would be possible by comparing the genomes of representatives of the putative parental groups with the genomes of representatives of the putative hybrid group.…”

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confidence: 94%

The origins of larval forms: what the data indicate, and what they don't

Minelli

2009

BioEssays

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What is a larva, if it is not what survives of an ancestor's adult, compressed into a transient pre-reproductive phase, as suggested by Haeckel's largely disreputed model of evolution by recapitulation? A recently published article hypothesizes that larva and adult of holometabolous insects are developmental expressions of two different genomes coexisting in the same animal as a result of an ancient hybridization event between an onychophoran and a primitive insect with eventless post-embryonic development. More likely, however, larvae originated from late embryonic or early post-embryonic stages of ancestors with direct development. Evolutionary novelties would thus be intercalary rather than terminal, with respect to the ancestor's ontogenetic schedule. This scenario, supported by current research on holometabolous insects and marine invertebrates with complex life cycles, offers a serious alternative to the traditional scenario ('what is early in ontogeny is also early in phylogeny') underlying the current perception of the evolution of genetic regulatory networks.

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Larval Transfer in Evolution

Williamson

2002

Horizontal Gene Transfer

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Testing Cold Fusion of Phyla: Maternity in a Tunicate × Sea Urchin Hybrid Determined From Dna Comparisons

Cited by 4 publications

References 18 publications

Caterpillars did not evolve from onychophorans by hybridogenesis

Caterpillars did not evolve from onychophorans by hybridogenesis

The origins of larval forms: what the data indicate, and what they don't

Larval Transfer in Evolution

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