Colin D. Sumrall
YOU?
Author Swipe
View article: Ecological novelty at the start of the Cambrian and Ordovician radiations of echinoderms
Ecological novelty at the start of the Cambrian and Ordovician radiations of echinoderms Open
The Cambrian and Ordovician radiations marked the origins of all major echinoderm clades and established their Phanerozoic ecological blueprint. Recent claims of modest innovation of early echinoderms and other animals suggest constraints …
View article: <i>Pleurocystites</i>?<i>scylla</i>, a new species of pleurocystitid rhombiferan, and comments on early echinoderm teratologies
<i>Pleurocystites</i>?<i>scylla</i>, a new species of pleurocystitid rhombiferan, and comments on early echinoderm teratologies Open
Pleurocystitid echinoderms are known to have consistent plating in the theca or body. However, many specimens with aberrant plating are known among glyptocystitoids ( Glyptocystella , Hadrocystis , Tyrridiocystis , and so on) as well as th…
View article: A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology
A Review and Evaluation of Homology Hypotheses in Echinoderm Paleobiology Open
The extraxial-axial theory (EAT) and universal elemental homology (UEH) are often portrayed as mutually exclusive hypotheses of homology within pentaradiate Echinodermata. EAT describes homology upon the echinoderm bauplan, interpreted thr…
View article: Ancient deep ocean as a harbor of biotic innovation revealed by Carboniferous ophiuroid microfossils
Ancient deep ocean as a harbor of biotic innovation revealed by Carboniferous ophiuroid microfossils Open
Fossil-informed molecular phylogenies have emerged as the most powerful tool for correlating biotic evolution and Earth history. The accuracy of these trees, however, depends on the completeness of fossil sampling. For most organismal clad…
View article: Ancient deep ocean as a harbor of biotic innovation revealed by Carboniferous ophiuroid microfossils
Ancient deep ocean as a harbor of biotic innovation revealed by Carboniferous ophiuroid microfossils Open
Fossil-informed molecular phylogenies have emerged as the most powerful tool for correlating biotic evolution and Earth history. The accuracy of these trees, however, depends on the completeness of fossil sampling. For most organismal clad…
View article: Cambrian edrioasteroid reveals new mechanism for secondary reduction of the skeleton in echinoderms
Cambrian edrioasteroid reveals new mechanism for secondary reduction of the skeleton in echinoderms Open
Echinoderms are characterized by a distinctive high-magnesium calcite endoskeleton as adults, but elements of this have been drastically reduced in some groups. Herein, we describe a new pentaradial echinoderm, Yorkicystis haefneri n. gen.…
View article: Echinoderm model systems, homology, and phylogenetic inference: comment and reply to Paul (2021)
Echinoderm model systems, homology, and phylogenetic inference: comment and reply to Paul (2021) Open
Bauer, Jennifer E., Sheffield, Sarah L., Waters, Johnny A., Sumrall, Colin D. (2022): Echinoderm model systems, homology, and phylogenetic inference: comment and reply to Paul (2021). Acta Palaeontologica Polonica 67 (2): 465-468, DOI: 10.…
View article: Supplementary table 1 from Cambrian edrioasteroid reveals new mechanism for secondary reduction of the skeleton in echinoderms
Supplementary table 1 from Cambrian edrioasteroid reveals new mechanism for secondary reduction of the skeleton in echinoderms Open
Character states for all taxa included in the phylogenetic analyses.
View article: Nex file from Cambrian edrioasteroid reveals new mechanism for secondary reduction of the skeleton in echinoderms
Nex file from Cambrian edrioasteroid reveals new mechanism for secondary reduction of the skeleton in echinoderms Open
Data for phylogenetic analysis
View article: JPA volume 95 issue 6 Cover and Back matter
JPA volume 95 issue 6 Cover and Back matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: JPA volume 95 issue 5 Cover and Back matter
JPA volume 95 issue 5 Cover and Back matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: JPA volume 95 issue 4 Cover and Back matter
JPA volume 95 issue 4 Cover and Back matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: JPA volume 95 issue 3 Cover and Back matter
JPA volume 95 issue 3 Cover and Back matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: JPA volume 95 issue 2 Cover and Back matter
JPA volume 95 issue 2 Cover and Back matter Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the ‘Save PDF’ action button.
View article: Evolution and Development at the Origin of a Phylum
Evolution and Development at the Origin of a Phylum Open
View article: Re-evaluating the phylogenetic position of the enigmatic early Cambrian deuterostome Yanjiahella
Re-evaluating the phylogenetic position of the enigmatic early Cambrian deuterostome Yanjiahella Open
View article: A revaluation of rhipidocystid echinoderms based on a new flattened blastozoan from the Upper Ordovician of Maryland, USA
A revaluation of rhipidocystid echinoderms based on a new flattened blastozoan from the Upper Ordovician of Maryland, USA Open
Zamora, Samuel, Sprinkle, James, Sumrall, Colin D. (2020): A revaluation of rhipidocystid echinoderms based on a new flattened blastozoan from the Upper Ordovician of Maryland, USA. Acta Palaeontologica Polonica 65 (3): 455-465, DOI: 10.42…
View article: A stem group echinoderm from the basal Cambrian of China and the origins of Ambulacraria
A stem group echinoderm from the basal Cambrian of China and the origins of Ambulacraria Open
View article: A re-interpretation of the ambulacral system of Eumorphocystis (Blastozoa: Echinodermata) and its bearing on the evolution of early crinoids
A re-interpretation of the ambulacral system of Eumorphocystis (Blastozoa: Echinodermata) and its bearing on the evolution of early crinoids Open
Recent debates over the evolutionary relationships of early echinoderms have relied heavily on morphological evidence from the feeding ambulacral system. Eumorphocystis, a Late Ordovician diploporitan, has been a focus in these debates bec…
View article: Late Ordovician (Hirnantian) diploporitan fauna of Anticosti Island, Quebec, Canada: implications for evolutionary and biogeographic patterns
Late Ordovician (Hirnantian) diploporitan fauna of Anticosti Island, Quebec, Canada: implications for evolutionary and biogeographic patterns Open
Hirnantian (latest Ordovician) localities containing echinoderm fossils are rare; the few that have been discovered primarily contain disarticulated crinoid ossicles. Therefore, relatively little is known about echinoderm evolutionary dyna…
View article: New insights concerning homology of the oral region and ambulacral system plating of pentaradial echinoderms
New insights concerning homology of the oral region and ambulacral system plating of pentaradial echinoderms Open
Universal elemental homology (UEH) underpins recent understanding of peristomial and ambulacral elemental homology of pentaradiate echinoderms by providing a uniform set of terminology to construct phylogenetic characters. Variation in the…
View article: A new model of respiration in blastoid (Echinodermata) hydrospires based on computational fluid dynamic simulations of virtual 3D models
A new model of respiration in blastoid (Echinodermata) hydrospires based on computational fluid dynamic simulations of virtual 3D models Open
Hydrospires are internal structures in blastoids that primarily served a respiratory function. Historically, hydrospires have been modeled as passive-flow respiratory structures with a vertical orientation. This project constructed virtual…
View article: Hydrospire morphology and implications for blastoid phylogeny
Hydrospire morphology and implications for blastoid phylogeny Open
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 studie…
View article: Generic revision of the Holocystitidae of North America (Diploporita, Echinodermata) based on universal elemental homology
Generic revision of the Holocystitidae of North America (Diploporita, Echinodermata) based on universal elemental homology Open
The Holocystites Fauna is an enigmatic group of North American diploporitans that presents a rare window into unusual middle Silurian echinoderm communities. Multiple systematic revisions have subdivided holocystitids on the basis of presu…
View article: Chapter 13 Cambrian echinoderm diversity and palaeobiogeography
Chapter 13 Cambrian echinoderm diversity and palaeobiogeography Open
The distribution of all known Cambrian echinoderm taxa, encompassing both articulated specimens and taxonomically diagnostic isolated ossicles, is documented for the first time. The database described by 2011 comprises 188 species recorded…
View article: Early post-metamorphic, Carboniferous blastoid reveals the evolution and development of the digestive system in echinoderms
Early post-metamorphic, Carboniferous blastoid reveals the evolution and development of the digestive system in echinoderms Open
Inferring the development of the earliest echinoderms is critical to uncovering the evolutionary assembly of the phylum-level body plan but has long proven problematic because early ontogenetic stages are rarely preserved as fossils. Here,…