Project 5007: J. R. Thompson, G. V. Mirantsev, E. Petsios, D. J. Bottjer, A. Smith. 2020. Phylogenetic analysis of the Archaeocidaridae and Palaeozoic Miocidaridae (Echinodermata, Echinoidea) and the origin of crown group echinoids. Papers in Palaeontology. 6 (2):217-249.
Abstract
The archaeocidarids comprise the most derived stem group echinoids and have long been regarded as closely related to the crown group. The fossil record of echinoids in the Palaeozoic is, however, poor, so details surrounding the initial divergence of crown group echinoids are not well constrained. In order to better understand the phylogenetic relationships of the most derived stem group and most basal crown group echinoids, a phylogenetic analysis was undertaken of the Archaeocidaridae, including the genera Nortonechinus, Devonocidaris, Lepidocidaris, Polytaxicidaris and Archaeocidaris and the Palaeozoic miocidarid cidaroids from the genus Eotiaris. We found that Archaeocidaris appears to be paraphyletic with respect to crown group echinoids. Furthermore, we mapped character evolution along our phylogeny and found that the diversification of archaeocidarids and miocidarids may be linked to large‐scale macroecological changes taking place in the late Palaeozoic, including increasing predation pressure and echinoid encrustation by epibionts. We compared the stratigraphical distribution of archaeocidarid and miocidarid occurrences to our resulting phylogenies, and found that the fit of our cladograms to the stratigraphic record of archaeocidarid occurrences is worse than other echinoid groups, supporting the idea that the imbricate plated archaeocidarids have a poor fossil record. In the course of carrying out these analyses, we also felt it necessary to describe a new species of Archaeocidaris, Archaeocidaris ivanovi sp. nov. We also provide novel descriptions and interpretations for Devonocidaris primaevus, Archaeocidaris brownwoodensis, Archaeocidaris apheles and revise the synonymy of Archaeocidaris legrandensis and ?Eotiaris meurevillensis, which may be a crown group echinoid.Read the article »
Article DOI: 10.1002/spp2.1280
Project DOI: 10.7934/P5007, http://dx.doi.org/10.7934/P5007
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 502 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 25 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 61 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:25/0 |
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MorphoBank Project 5007
MorphoBank Project 5007
- Creation Date:
16 December 2023 - Publication Date:
28 December 2023 - Project views: 1146
Authors' Institutions
- University of Southern California
- Borissiak Paleontological Institute RAS, Moscow, Russia
- Baylor University
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Shreya Jariwala Project Administrator | 23 | 3 | 3 | 25 | 0 | 0 | 502 (502, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29589' (23 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Nortonechinus welleri Last Modified in 12/17/23 | 1 | 24 | 24 | 0 | 0 | 0 | 0 | 1 |
[2] † Archaeocidaris marmorcataractensis Last Modified in 12/17/23 | 4 | 21 | 21 | 0 | 0 | 0 | 0 | 1 |
[3] † Archaeocidaris hemispinifera Last Modified in 12/17/23 | 4 | 21 | 21 | 0 | 0 | 0 | 0 | 1 |
[4] † Polytaxicidaris dyeri Last Modified in 12/17/23 | 5 | 20 | 20 | 0 | 0 | 0 | 0 | 1 |
[5] † Polytaxicidaris lirata Last Modified in 12/17/23 | 1 | 24 | 24 | 0 | 0 | 0 | 0 | 1 |
[6] † Eotiaris connorsi Last Modified in 12/17/23 | 4 | 21 | 21 | 0 | 0 | 0 | 0 | 1 |
[7] † Eotiaris keyserlingi Last Modified in 12/17/23 | 5 | 20 | 20 | 0 | 0 | 0 | 0 | 1 |
[8] † Archaeocidaris wortheni Last Modified in 12/17/23 | 2 | 23 | 23 | 0 | 0 | 0 | 0 | 1 |
[9] † Archaeocidaris agassizi Last Modified in 12/17/23 | 5 | 20 | 20 | 0 | 0 | 0 | 0 | 1 |
[10] † Archaeocidaris blairi Last Modified in 12/17/23 | 1 | 24 | 24 | 0 | 0 | 0 | 0 | 1 |
[11] † Archaeocidaris rossica Last Modified in 12/17/23 | 1 | 24 | 24 | 0 | 0 | 0 | 0 | 1 |
[12] † Archaeocidaris immanis Last Modified in 12/17/23 | 10 | 15 | 15 | 0 | 0 | 0 | 0 | 1 |
[13] † Archaeocidaris legrandensis Last Modified in 12/17/23 | 1 | 24 | 24 | 0 | 0 | 0 | 0 | 1 |
[14] † Archaeocidaris brownwoodensis Last Modified in 12/17/23 | 0 | 25 | 25 | 0 | 0 | 0 | 0 | 1 |
[15] † Archaeocidaris apheles Last Modified in 12/17/23 | 4 | 21 | 21 | 0 | 0 | 0 | 0 | 1 |
[16] † Archaeocidaris whatleyensis Last Modified in 12/17/23 | 1 | 24 | 24 | 0 | 0 | 0 | 0 | 1 |
[17] † Lepidocidaris squamosa Last Modified in 12/17/23 | 1 | 24 | 24 | 0 | 0 | 0 | 0 | 1 |
[18] † Devonocidaris primaevus Last Modified in 12/17/23 | 2 | 23 | 23 | 0 | 0 | 0 | 0 | 1 |
[19] † Archaeocidaris ivanovi Last Modified in 12/17/23 | 1 | 24 | 24 | 0 | 0 | 0 | 0 | 1 |
[20] † Archaeocidaris mosquensis Last Modified in 12/17/23 | 6 | 19 | 19 | 0 | 0 | 0 | 0 | 1 |
[21] † Archaeocidaris subwortheni Last Modified in 12/17/23 | 2 | 23 | 23 | 0 | 0 | 0 | 0 | 1 |
[22] † Eotiaris guadalupensis Last Modified in 12/17/23 | 6 | 19 | 19 | 0 | 0 | 0 | 0 | 1 |
[23] † ? eotiaris meurevillensis Last Modified in 12/17/23 | 6 | 19 | 19 | 0 | 0 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 1146 | |
Matrix views | 66 | Matrix landing page (56 views); Thompson et al 2020 (10 views); |
Taxon list | 298 | |
Media views | 303 | Media search (194 views); M898412 (35 views); M898411 (38 views); M898413 (36 views); |
Project overview | 84 | |
Documents list | 53 | |
Specimen list | 223 | |
Views for media list | 75 | |
Bibliography | 44 |