ArticleJournal of molecular evolution1995
Multiple origins of anural development in ascidians inferred from rDNA sequences.
Article in Journal of molecular evolution, 1995. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 92 citations in OpenAlex.
- Women in tunicate research: Pioneers of the past and their present legacy.Genesis (New York, N.Y. : 2000) · 2023Article
- A cis-regulatory change underlying the motor neuron-specific loss of Ebf expression in immotile tunicate larvae.Evolution & development · 2021Article
- Review
- The Comparative Organismal Approach in Evolutionary Developmental Biology: Insights from Ascidians and Cavefish.Current topics in developmental biology · 2016Review
- Tunicates: exploring the sea shores and roaming the open ocean. A tribute to Thomas Huxley.Open biology · 2015Review
- Article
- Life cycle evolution: was the eumetazoan ancestor a holopelagic, planktotrophic gastraea?BMC evolutionary biology · 2013Review
- Expression of a muscle determinant gene, macho-1, in the anural ascidian Molgula tectiformis.Development genes and evolution · 2006Article
- Invertebrate species with nonpelagic larvae have elevated levels of nonsynonymous substitutions and reduced nucleotide diversities.Journal of molecular evolution · 2003Article
- Evolution of the chordate body plan: new insights from phylogenetic analyses of deuterostome phyla.Proceedings of the National Academy of Sciences of the United States of America · 2000Article
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Authors and funding
3 authors at 2 institutions in 2 countries.
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Abstract
Ascidians exhibit two different modes of development. A tadpole larva is formed during urodele development, whereas the larval phase is modified or absent during anural development. Anural development is restricted to a small number of species in one or possibly two ascidian families and is probably derived from ancestors with urodele development. Anural and urodele ascidians constitute a model system in which to study the evolution of development, but the phylogeny of anural development has not been resolved. Classification based on larval characters suggests that anural species are monophyletic, whereas classification according to adult morphology suggests they are polyphyletic. In the present study, we have inferred the origin of anural development using rDNA sequences. The central region of 18S rDNA and the hypervariable D2 loop of 28S rDNA were amplified from the genomic DNA of anural and urodele ascidian species by the polymerase chain reaction and sequenced. Phylogenetic trees inferred from 18S rDNA sequences of 21 species placed anural developers into two discrete groups corresponding to the Styelidae and Molgulidae, suggesting that anural development evolved independently in these families. Furthermore, the 18S rDNA trees inferred at least four independent origins of anural development in the family Molgulidae. Phylogenetic trees inferred from the D2 loop sequences of 13 molgulid species confirmed the 18S rDNA phylogeny. Anural development appears to have evolved rapidly because some anural species are placed as closely related sister groups to urodele species. The phylogeny inferred from rDNA sequences is consistent with molgulid systematics according to adult morphology and supports the polyphyletic origin of anural development in ascidians.
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