Mitochondrial rDNA Phylogeny of the Asteroidea Suggests the Primitiveness of the Paxillosida

Wada, Hiroshi; Komatsu, Miéko; Satoh, Noriyuki

doi:10.1006/mpev.1996.0062

Cited by 45 publications

(61 citation statements)

References 9 publications

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“…The phylogenetic results of Blake (1987), Mah and Foltz (2011b) and Fig. 5 are all consistent with a "Paxillosida is derived" scenario which counters the "Paxillosida is primitive" perspective of Mortensen (1922,1923), Fell (1962a, 1962b, LaFay et al (1995), Wada et al (1996) and Gale (1987Gale ( , 2011. The "Paxillosida is primitive" scenario was originally based on the assumption that the absence of brachiolaria larvae and suckered tube feet in the extant Paxillosida was the plesiomorphic condition for asteroids (Mortensen, 1922) and was later augmented with fossil data (Fell, 1962a(Fell, , 1962bGale, 1987Gale, , 2011.…”

Section: The Paxillosida and Notomyotidasupporting

confidence: 70%

“…Linchangco et al Molecular Phylogenetics and Evolution 115 (2017) 161-170 Gale's (1987) non-cladistic phylogeny embedded both the Echinasteridae and the Asterinidae on distant clades within the Valvatida. The molecular treatments of Wada et al (1996) and Matsubara et al (2004) included only Henricia in their analyses, a genus that was placed in varied positions on their trees. Wada et al (1996) and Matsubara et al (2004) also included several species of the Asterinidae which (although monophyletic) were consistently reconstructed as the sister clade to the Asteriidae (Forcipulatacea).…”

Section: The Spinulosida Patiria and Asteropsismentioning

confidence: 99%

“…The molecular treatments of Wada et al (1996) and Matsubara et al (2004) included only Henricia in their analyses, a genus that was placed in varied positions on their trees. Wada et al (1996) and Matsubara et al (2004) also included several species of the Asterinidae which (although monophyletic) were consistently reconstructed as the sister clade to the Asteriidae (Forcipulatacea). This relationship has not been reproduced by other studies with comparable taxon sampling.…”

Section: The Spinulosida Patiria and Asteropsismentioning

confidence: 99%

“…This discussion was historically framed as the question of whether the order Paxillosida (or one of its member families) diverged early or late during asteroid evolution. Evidence has been presented for (Mortensen, 1922(Mortensen, , 1923Fell, 1962aFell, , 1962bFell, , 1963Gale, 1987;Lafay et al, 1995;Wada et al, 1996;Gale, 2013) and against (MacBride, 1921(MacBride, , 1923a(MacBride, , 1923bMadsen, 1966;Blake, 1972Blake, , 1987Blake, , 1988Janies et al, 2011;Mah and Blake, 2012;Blake and Mah, 2014) an early divergence of Paxillosida among asteroid lineages. Recent morphological and molecular-based hypotheses of phylogenetic relationships amongst traditional asteroid orders are summarized in Fig.…”

Section: Introductionmentioning

confidence: 99%

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The phylogeny of extant starfish (Asteroidea: Echinodermata) including Xyloplax, based on comparative transcriptomics

Linchangco

Foltz

Reid

et al. 2017

Molecular Phylogenetics and Evolution

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A B S T R A C TMulti-locus phylogenetic studies of echinoderms based on Sanger and RNA-seq technologies and the fossil record have provided evidence for the Asterozoa-Echinozoa hypothesis. This hypothesis posits a sister relationship between asterozoan classes (Asteroidea and Ophiuroidea) and a similar relationship between echinozoan classes (Echinoidea and Holothuroidea). Despite this consensus around Asterozoa-Echinozoa, phylogenetic relationships within the class Asteroidea (sea stars or starfish) have been controversial for over a century. Open questions include relationships within asteroids and the status of the enigmatic taxon Xyloplax. Xyloplax is thought by some to represent a newly discovered sixth class of echinoderms -and by others to be an asteroid. To address these questions, we applied a novel workflow to a large RNA-seq dataset that encompassed a broad taxonomic and genomic sample. This study included 15 species sampled from all extant orders and 13 families, plus four ophiuroid species as an outgroup. To expand the taxonomic coverage, the study also incorporated five previously published transcriptomes and one previously published expressed sequence tags (EST) dataset. We developed and applied methods that used a range of alignment parameters with increasing permissiveness in terms of gap characters present within an alignment. This procedure facilitated the selection of phylogenomic data subsets from large amounts of transcriptome data. The results included 19 nested data subsets that ranged from 37 to 4,281 loci. Tree searches on all data subsets reconstructed Xyloplax as a velatid asteroid rather than a new class. This result implies that asteroid morphology remains labile well beyond the establishment of the body plan of the group. In the phylogenetic tree with the highest average asteroid nodal support several monophyletic groups were recovered. In this tree, Forcipulatida and Velatida are monophyletic and form a clade that includes Brisingida as sister to Forcipulatida. Xyloplax is consistently recovered as sister to Pteraster. Paxillosida and Spinulosida are each monophyletic, with Notomyotida as sister to the Paxillosida. Valvatida is recovered as paraphyletic. The results from other data subsets are largely consistent with these results. Our results support the hypothesis that the earliest divergence event among extant asteroids separated Velatida and Forcipulatacea from Valvatacea and Spinulosida.

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Section: The Paxillosida and Notomyotidasupporting

confidence: 70%

Section: The Spinulosida Patiria and Asteropsismentioning

confidence: 99%

Section: The Spinulosida Patiria and Asteropsismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The phylogeny of extant starfish (Asteroidea: Echinodermata) including Xyloplax, based on comparative transcriptomics

Linchangco

Foltz

Reid

et al. 2017

Molecular Phylogenetics and Evolution

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show abstract

“…Since classification of asteroids have been reformulated in these twenty years (Blake, 1987;Gale, 1987;Clark and Downey, 1992), several molecular phylogenetic studies have been performed to evaluate the phylogenetic relationships (Lafay et al ., 1995;Wada et al ., 1996;Knott and Wray, 2000). Although these molecular analyses have not succeeded to provide convincing phylogenetic framework of asteroids so far, the affinity between Asterina and Solaster is supported with relatively high supporting values (Wada et al ., 1996).…”

Section: Introductionmentioning

confidence: 99%