A Reconnaissance of Skeletal Crystallography in Rhombiferans, Diploporans, and Paracrinoids

Bodenbender, Brian E.; Hiemstra, Erik J.

doi:10.1666/0022-3360(2004)078<1154:arosci>2.0.co;2

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Judging from citations to his publications, the work discussed so far seems to have been of interest mainly to students of echinoids, and even then the application and extension of Dave’s findings to phylogenetic problems has been limited (for echinoid examples, see Emlet 1988 and Kroh and Smith 2010). However, a few paleontologists, notably Dan Fisher and his students, have gone on to apply crystallography to the systematics of other echinoderm groups, including stylophorans, crinoids, and blastozoans (Fisher and Cox 1988; Bodenbender 1996; Bodenbender and Ausich 2000; Bodenbender and Hiemstra 2004).…”

mentioning

confidence: 99%

The Contributions of David Malcolm Raup (24 April 1933–9 July 2015)

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Miller

2016

Paleobiology

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mentioning

confidence: 99%

The Contributions of David Malcolm Raup (24 April 1933–9 July 2015)

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Miller

2016

Paleobiology

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A Review of Blastozoan Echinoderm Respiratory Structures

Sheffield

Limbeck

Bauer

et al. 2022

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Echinoderms have evolved diverse and disparate morphologies throughout the Phanerozoic. Among them, blastozoans, an extinct group of echinoderms that were an important component of Paleozoic marine ecosystems, are primarily subdivided into groups based on the morphology of respiratory structures. However, systematic and phylogenetic research from the past few decades have shown that respiratory structures in blastozoans are not group-defining and they have re-evolved throughout echinoderm evolution. This Element provides a review of the research involving blastozoan respiratory structures, along with research concerning the morphology, paleoecology, and ontogeny of each of the major groupings of blastozoans as it relates to their corresponding respiratory structures. Areas of future research in these groups are also highlighted.

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Radial Symmetry, the Anterior/Posterior Axis, and Echinoderm Hox Genes

Mooi

David

2008

Annu. Rev. Ecol. Evol. Syst.

104

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The strangeness of echinoderm pentaradiality results from superposition of radial symmetry onto ancestral deuterostome bilaterality. The Extraxial-Axial Theory shows that echinoderms also have an anterior/posterior (A/P) axis developed independently and ontogenetically before radiality. The A/P axis is first established via coelomic stacking in the extraxial region, with ensuing development of the pentamerous hydrocoel in the axial region. This is strongly correlated with a variety of gene expression patterns. The echinoid Hox cluster is disordered into two different sets of genes. During embryogenesis, members of the posterior class demonstrate temporal, spatial, and genetic colinearity within the extraxial region. We suggest that displacement of genes from the more anterior Hox classes toward the 5′ end of the chromosome leads to control of the later-developing, radially symmetric axial region. Genetic disorder is therefore another way of using colinearity to build the unique echinoderm symmetry.

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A Reconnaissance of Skeletal Crystallography in Rhombiferans, Diploporans, and Paracrinoids

Cited by 3 publications

References 11 publications

The Contributions of David Malcolm Raup (24 April 1933–9 July 2015)

The Contributions of David Malcolm Raup (24 April 1933–9 July 2015)

A Review of Blastozoan Echinoderm Respiratory Structures

Radial Symmetry, the Anterior/Posterior Axis, and Echinoderm Hox Genes

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