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Hydrospire morphology and implications for blastoid phylogeny

  • Jennifer E. Bauer (a1), Colin D. Sumrall (a1) and Johnny A. Waters (a2)
Abstract
Abstract

The external expression of hydrospires in blastoids has provided a basis for major and minor group classification in the clade for over a century. Unfortunately, the complete anatomy of the hydrospires has never been comprehensively studied. This study examined and described the internal hydrospires of six spiraculate species by digitally extracting hydrospire data from a legacy data set of serial acetate peels. Although only six models have been currently generated, hydrospire morphology is variable both within and between previously described spiraculate families. Hydrospires were found to possess novel characters that were incorporated into a phylogenetic analysis of the six digitally modeled species and several related species. The addition of internal morphology into the phylogenetic analysis provides further resolution between groupings of blastoids.

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J.W. Atwood , and C.D. Sumrall , 2012, Morphometric investigation of the Pentremites fauna from the Glen Dean Formation, Kentucky: Journal of Paleontology, v. 86, p. 813828.

J.E. Bauer , and A.L. Stigall , 2016, A combined morphometric and phylogenetic revision of the Late Ordovician brachiopod genera Eochonetes and Thaerodonta : Journal of Paleontology, v. 90, 888909.

H.H. Beaver , 1996, Hydrospire meshwork of the Carboniferous blastoid Pentremites Say: Journal of Paleontology, v. 70, p. 333335.

B.E. Bodenbender , and D.C. Fisher , 2001, Stratocladistic analysis of blastoid phylogeny: Journal of Paleontology, v. 75, p. 351369.

T.A. Dexter , C.D. Sumrall , and M.L. McKinney , 2009, Allometric strategies for increasing respiratory surface area in the Mississippian blastoid Pentremites : Lethaia, v. 42, p. 127137.

O. Jaekel , 1918, Phylogenie und system der pelmatozoen: Palaeontologische Zeitschrift, v. 3, p. 1128.

K.A. Joysey , 1959, A study on the variation and relative growth in the blastoid Orbitremites : Philosophical Transactions of the Royal Society of London, Series B, Biological Sciences, v. 242, no. 68, p. 99125.

T.W. Kammer , C.D. Sumrall , S. Zamora , W.I. Ausich , and B. Deline , 2013, Oral region homologies in Paleozoic crinoids and other plesiomorphic pentaradial echinoderms: PLoS ONE, v. 8, e77989, doi: 10.1371/journal.pone.0077989.

S.G. Katz , and J. Sprinkle , 1976, Fossilized eggs in a Pennsylvanian blastoid: Science, v. 192, p. 11371139.

L.R. Leighton , and C.G. Maples , 2002, Evaluating internal versus external characters: Phylogenetic analyses of the Echinoconchidae, Buxtoniinae, and Juresaniinae (Phylum Brachiopoda): Journal of Paleontology, v. 76, p. 659671.

I.A. Rahman , and S. Zamora , 2009, The oldest cinctan carpoid (stem-group Echinodermata), and the evolution of the water vascular system: Zoological Journal of the Linnean Society, v. 157, p. 420432.

I.A. Rahman , J.A. Waters , C.D. Sumrall , and A. Astolfo , 2015, Early post-metamorphic, Carboniferous blastoid reveals the evolution and development of the digestive system in echinoderms: Biology Letters, v. 11, 2015776 10.1098/rsbl.2015.0776.

R.C. Schmidtling , and C.R. Marshall II, 2010, Three dimensional structure and fluid flow through the hydrospires of the blastoid echinoderm, Pentremites rusticus : Journal of Paleontology, v. 84, p. 109117.

C.D. Sumrall , and J.A. Waters , 2012, Universal elemental homology in glyptocystitoids, hemicosmitoids, coronoids and blastoids: Steps toward echinoderm phylogenetic reconstruction in derived Blastozoa: Journal of Paleontology, v. 86, p. 956972.

J.A. Waters , and A.S. Horowitz , 1993, Ordinal-level evolution in the Blastoidea: Lethaia, v. 26, p. 207213.

D.F. Wright , and A.L. Stigall , 2013, Phylogenetic revision of the Late Ordovician orthid brachiopod genera Plaesiomys and Hebertella from North America: Journal of Paleontology, v. 87, p. 11071128.

D.F. Wright , and A.L. Stigall , 2014, Species-level phylogenetic revision of the orthide brachiopod Glyptorthis from North America: Journal of Systematic Paleontology, v. 12, p. 893906.

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Journal of Paleontology
  • ISSN: 0022-3360
  • EISSN: 1937-2337
  • URL: /core/journals/journal-of-paleontology
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