Project 4865: T. P. Topper, J. Guo, S. Clausen, C. B. Skovsted, Z. Zhang. 2019. A stem group echinoderm from the basal Cambrian of China and the origins of Ambulacraria. Nature Communications. 10 (1):null.
Abstract
Deuterostomes are a morphologically disparate clade, encompassing the chordates (including vertebrates), the hemichordates (the vermiform enteropneusts and the colonial tube-dwelling pterobranchs) and the echinoderms (including starfish). Although deuterostomes are considered monophyletic, the inter-relationships between the three clades remain highly contentious. Here we report, Yanjiahella biscarpa, a bilaterally symmetrical, solitary metazoan from the early Cambrian (Fortunian) of China with a characteristic echinoderm-like plated theca, a muscular stalk reminiscent of the hemichordates and a pair of feeding appendages. Our phylogenetic analysis indicates that Y. biscarpa is a stem-echinoderm and not only is this species the oldest and most basal echinoderm, but it also predates all known hemichordates, and is among the earliest deuterostomes. This taxon confirms that echinoderms acquired plating before pentaradial symmetry and that their history is rooted in bilateral forms. Yanjiahella biscarpa shares morphological similarities with both enteropneusts and echinoderms, indicating that the enteropneust body plan is ancestral within hemichordates. The early evolution of the deuterostomes is not well resolved. Here, Topper and colleagues investigate the early Cambrian metazoan Yanjiahella biscarpa, concluding that it is a stem echinoderm, is among the oldest known deuterstomes, and supports an ancestral enteropneust body plan in hemichordates.Read the article »
Article DOI: 10.1038/s41467-019-09059-3
Project DOI: 10.7934/P4865, http://dx.doi.org/10.7934/P4865
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 867 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 42 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 88 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:42/0 |
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MorphoBank Project 4865
MorphoBank Project 4865
- Creation Date:
04 September 2023 - Publication Date:
04 September 2023 - Project views: 3111
- Matrix downloads: 1
Authors' Institutions
- Swedish Museum of Natural History (Naturhistoriska riksmuseet) Stockholm
- Northwest University
- Universite de Lille
- Durham University
- Chang’an University
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Shreya Jariwala Project Administrator | 21 | 7 | 7 | 42 | 0 | 0 | 867 (601, 0, 266) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29472' (21 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] Cephalochordata Last Modified in 09/04/23 | 1 | 18 | 18 | 0 | 23 | 0 | 0 | 1 |
[2] Harimaniidae Last Modified in 09/04/23 | 0 | 20 | 20 | 0 | 22 | 0 | 0 | 1 |
[3] Enteropneusta Last Modified in 09/04/23 | 0 | 20 | 20 | 0 | 22 | 0 | 0 | 1 |
[4] † Spartobranchus Last Modified in 09/04/23 | 0 | 20 | 20 | 0 | 22 | 0 | 0 | 1 |
[5] † Oesia Last Modified in 09/04/23 | 0 | 20 | 20 | 0 | 22 | 0 | 0 | 1 |
[6] Rhabdopleurida Last Modified in 09/04/23 | 0 | 19 | 19 | 0 | 23 | 0 | 0 | 1 |
[7] Cephalodiscida Last Modified in 09/04/23 | 0 | 20 | 20 | 0 | 22 | 0 | 0 | 1 |
[8] † Yanjiahella Last Modified in 09/04/23 | 6 | 26 | 26 | 0 | 10 | 0 | 0 | 1 |
[9] † Ctenocystoida Last Modified in 09/04/23 | 2 | 25 | 25 | 0 | 15 | 0 | 0 | 1 |
[10] † Cincta Last Modified in 09/04/23 | 1 | 26 | 26 | 0 | 15 | 0 | 0 | 1 |
[11] † Soluta Last Modified in 09/04/23 | 1 | 35 | 35 | 0 | 6 | 0 | 0 | 1 |
[12] † Helicoplacus Last Modified in 09/04/23 | 0 | 31 | 31 | 0 | 11 | 0 | 0 | 1 |
[13] † Kinzercystis Last Modified in 09/04/23 | 0 | 39 | 39 | 0 | 3 | 0 | 0 | 1 |
[14] † Gogia Last Modified in 09/04/23 | 0 | 37 | 37 | 0 | 5 | 0 | 0 | 1 |
[15] † Akadocrinus Last Modified in 09/04/23 | 3 | 35 | 35 | 0 | 4 | 0 | 0 | 1 |
[16] Macrocystella Last Modified in 09/04/23 | 0 | 37 | 37 | 0 | 5 | 0 | 0 | 1 |
[17] † Ubaghsicystis Last Modified in 09/04/23 | 0 | 37 | 37 | 0 | 5 | 0 | 0 | 1 |
[18] † Pleurocystites Last Modified in 09/04/23 | 0 | 37 | 37 | 0 | 5 | 0 | 0 | 1 |
[19] † Aethocrinus Last Modified in 09/04/23 | 0 | 38 | 38 | 0 | 4 | 0 | 0 | 1 |
[20] † Stromatocystites Last Modified in 09/04/23 | 0 | 31 | 31 | 0 | 11 | 0 | 0 | 1 |
[21] † Camptostroma Last Modified in 09/04/23 | 1 | 30 | 30 | 0 | 11 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 3111 | |
Project overview | 152 | |
Documents list | 102 | |
Bibliography | 79 | |
Media views | 824 | Media search (355 views); M894451 (69 views); M894448 (65 views); M894449 (69 views); M894445 (68 views); M894450 (64 views); M894447 (69 views); M894446 (65 views); |
Matrix views | 113 | Matrix landing page (107 views); Topper et al 2019 (6 views); |
Specimen list | 826 | |
Views for media list | 133 | |
Taxon list | 882 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 1 | |
Matrix downloads | 1 | Topper et al 2019 (1 download); |