WoRMS source details

Mah, C. (2007). Systematics, phylogeny and historical biogeography of the Pentagonaster clade (Asteroidea: Valvatida: Goniasteridae. Invertebrate Systematics. 21: 311-339.
43953
10.1071/IS06049 [view]
Mah, C.
2007
Systematics, phylogeny and historical biogeography of the Pentagonaster clade (Asteroidea: Valvatida: Goniasteridae
Invertebrate Systematics
21: 311-339
Publication
Morphology-based phylogenetic hypotheses developed for living and fossil goniasterid asteroids, have provided several unique opportunities to study bathymetric and biogeographic shifts for an ecologically important group of prominent, megafaunal invertebrates. A cladistic analysis of 18 ingroup taxa employing 65 morphological characters resulted in a single most parsimonious tree. The tree supports assignment of the Atlantic Tosia parva and the Pacific Tosia queenslandensis to new, separate genera. The phylogenetic tree supports offshore-onshore bathymetric shifts between basal and derived taxa. The phylogeny is also consistent with historical events surrounding the separation of Antarctica from Australia and South Africa. Buterminaster from the Eocene La Meseta Formation, Antarctic Peninsula, was included in the phylogenetic analysis and is now supported as the only fossil species in the genus Pentagonaster. Pentagonaster stibarus is separated from synonymy of P. dubeni and resurrected as a species. The new genus Akelbaster shows unusual new structures that resemble cribiform organs, although their function has not been determined. One specific ingroup lineage, including Tosia and Pentagonaster attains a much larger adult size than those of a sister group and including basal taxa, suggesting that Cope’s Rule may apply to asteroids within this clade. Pentagonaster and related genera are revised; descriptions of four new genera and three new species are presented, including Akelbaster novaecaledoniae gen. nov., sp. nov., Ryukuaster onnae gen. nov., sp. nov., Eknomiaster beccae sp. nov., Pawsonaster parvus gen. nov., comb. nov., and Anchitosia queenslandensis gen. nov. comb. nov.
Antarctic
Australia
Australia to South-east Asia
South Africa
Phylogeny, Phylogenesis
Subantarctic
Systematics, Taxonomy
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BibTex (BibDesk, LaTeX)
Date
action
by
2013-01-12 18:30:12Z
created
db_admin
2013-09-17 09:10:59Z
changed
2017-09-25 03:27:17Z
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Checked: verified by a taxonomic editorAkelbaster Mah, 2007 (original description)
Checked: verified by a taxonomic editorAkelbaster novaecaledoniae Mah, 2007 (original description)
Checked: verified by a taxonomic editorAnchitosia Mah, 2007 (original description)
Checked: verified by a taxonomic editorAnchitosia queenslandensis (Livingstone, 1932) (original description)
Checked: verified by a taxonomic editorEknomiaster H.E.S. Clark in H.E.S. Clark & D.G. McKnight, 2001 (additional source)
Checked: verified by a taxonomic editorEknomiaster beccae Mah, 2007 (basis of record)
Checked: verified by a taxonomic editorEknomiaster beccae Mah, 2007 (original description)
Checked: verified by a taxonomic editorEknomiaster macauleyensis H.E.S Clark in H.E.S. Clark & D.G. McKnight, 2001 (additional source)
Checked: verified by a taxonomic editorGoniasteridae Forbes, 1841 (additional source)
Checked: verified by a taxonomic editorPawsonaster Mah, 2007 (original description)
Checked: verified by a taxonomic editorPawsonaster parvus (Perrier, 1881) (additional source)
Checked: verified by a taxonomic editorPentagonaster Gray, 1840 (additional source)
Checked: verified by a taxonomic editorPentagonaster stibarus H.L. Clark, 1914 (additional source)
Checked: verified by a taxonomic editorPentagonasterinae Perrier, 1884 (identification resource)
Checked: verified by a taxonomic editorPentagonasterinae Perrier, 1884 (basis of record)
Checked: verified by a taxonomic editorRyukuaster Mah, 2007 (original description)
Checked: verified by a taxonomic editorRyukuaster onnae Mah, 2007 (original description)
Checked: verified by a taxonomic editorToraster A.M. Clark, 1952 (additional source)
Checked: verified by a taxonomic editorToraster tuberculatus (Gray, 1847) (additional source)
Checked: verified by a taxonomic editorTosia Gray, 1840 (additional source)
Checked: verified by a taxonomic editorTosia australis Gray, 1840 (additional source)
Checked: verified by a taxonomic editorTosia magnifica (Muller & Troschel, 1842) (basis of record)
Checked: verified by a taxonomic editorTosia nobilis (Muller & Troschel, 1843) accepted as Checked: verified by a taxonomic editorTosia australis Gray, 1840 (basis of record)
Checked: verified by a taxonomic editorTosia parva (Perrier, 1881) accepted as Checked: verified by a taxonomic editorPawsonaster parvus (Perrier, 1881) (basis of record)
Checked: verified by a taxonomic editorTosia queenslandensis Livingstone, 1932 accepted as Checked: verified by a taxonomic editorAnchitosia queenslandensis (Livingstone, 1932) (new combination reference)