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NameMah, C. (2007). Systematics, phylogeny and historical biogeography of the Pentagonaster clade (Asteroidea: Valvatida: Goniasteridae). Invertebrate Systematics 21: 311-339.
DOI10.1071/IS06049
AuthorsMah, C.
Year2007
TitleSystematics, phylogeny and historical biogeography of the Pentagonaster clade (Asteroidea: Valvatida: Goniasteridae
JournalInvertebrate Systematics
Suffix21: 311-339
Type Publication
AbstractMorphology-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.
Geographical
terms
Antarctic
Australia
Australia to South-east Asia
South Africa
Bibliographical
terms
Phylogeny, Phylogenesis
Subantarctic
Systematics, Taxonomy
Taxonomic
term
Asteroidea
Taxa
(25)
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 (additional source)
Checked: verified by a taxonomic editorAnchitosia queenslandensis (Livingstone, 1932) (original description)
Checked: verified by a taxonomic editorEknomiaster HES Clark in HES 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 HES Clark in HES 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 (new combination reference)
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 (basis of record)
Checked: verified by a taxonomic editorPentagonasterinae Perrier, 1884 (identification resource)
Checked: verified by a taxonomic editorRyukuaster Mah, 2007 (additional source)
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)
Distributions
(6)
New Caledonia for Eknomiaster macauleyensis HES Clark in HES Clark & D.G. McKnight, 2001
Norfolk Ridge for Eknomiaster beccae Mah, 2007
Port Phillip Bay for Tosia magnifica (Muller & Troschel, 1842)
South Africa for Toraster A.M. Clark, 1952
South Australia (state) for Tosia australis Gray, 1840
Tasmania for Tosia australis Gray, 1840
Edit
history
Date   action   by
2013-01-12 18:30:12Z  created  db_admin
2013-09-17 09:10:59Z  changed  Horton, Tammy
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