Project 537: J. C. Lamsdell, S. J. Braddy, O. E. Tetlie. 2010. The systematics and phylogeny of the Stylonurina (Arthropoda: Chelicerata: Eurypterida). Journal of Systematic Palaeontology. 8 (1):49-61.
Abstract
The first well-resolved phylogeny of stylonurine eurypterids (30 taxa, 58 characters) is presented, prompting a taxonomic revision at the familial and superfamilial levels. The monophyletic suborder Stylonurina consists of four superfamilies: Rhenopteroidea, Stylonuroidea, Kokomopteroidea and Hibbertopteroidea. The enigmatic hibbertopterids – large sweep-feeding forms from the Carboniferous to end-Permian – are therefore demonstrated to be an in-group Stylonurina clade, within Eurypterida, in contrast to some earlier hypotheses. Furthermore, the genus Drepanopterus is shown to be polyphyletic: ‘Drepanopterus’ bembycoides is transferred to Moselopteridae fam. nov. along with Moselopterus and Vinetopterus at the base of the Eurypterina, defined by their possession of a pediform appendage VI bearing a modified podomere 7a. Evolution towards a sweep-feeding mode of life occurred independently in stylonuroids and hibbertopteroids, involving either multiple rows of fixed spines on the prosomal appendages (in stylonuroids) or paired movable flattened spines (‘blades’) on the prosomal appendages alongside a posteriorly cleft metastoma and coxal laden (in hibbertopteroids). The Stylonurina have a relatively poor fossil record (RCI 15%), when compared to more derived Eurypterina clades (e.g. Adelophthalmoidea RCI 66%; Pterygotoidea RCI 53%), but is relatively more complete than basal Eurypterina clades (RCI -21%). The fit between phylogeny and stratigraphical occurrences of stylonurid taxa is good (SCI 0.65 and GER 0.77, with only 0.3% of 1000 randomisation tests yielding greater congruence; GER* 0.995), and generic-level collector curves of the Stylonurina and Eurypterina show no major discrepancies in their sampling histories. These differences could be explained by geographic collection bias, taxa having different habitat preferences (and hence fossilisation potential), and ontogenetic factors: these results support previous suggestions that stylonurine eurypterids are oversplit.Read the article »
Project DOI: 10.7934/P537, http://dx.doi.org/10.7934/P537
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 1290 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 58 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 117 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:58/0 |
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MorphoBank Project 537
MorphoBank Project 537
- Creation Date:
26 June 2011 - Publication Date:
05 July 2011 - Project views: 38992
- Matrix downloads: 7
Authors' Institutions
- West Virginia University
- University of Bristol
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
MorphoBank Curator Project Administrator | 0 | 1 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
Maureen Admin Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
James Lamsdell Full membership | 30 | 0 | 1 | 58 | 0 | 0 | 1290 (1201, 0, 89) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M1219' (30 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Weinbergina opitzi Last Modified in 12/05/13 | 0 | 52 | 52 | 0 | 6 | 0 | 0 | 3 |
[2] † Alkenopterus brevitelson Last Modified in 12/05/13 | 18 | 37 | 37 | 0 | 3 | 0 | 0 | 3 |
[3] † Brachyopterella pentagonalis Last Modified in 12/05/13 | 21 | 32 | 32 | 0 | 5 | 0 | 0 | 3 |
[4] † Brachyopterus stubblefieldi Last Modified in 12/05/13 | 10 | 44 | 44 | 0 | 4 | 0 | 0 | 3 |
[5] † Ctenopterus cestrotus Last Modified in 12/05/13 | 15 | 40 | 40 | 0 | 3 | 0 | 0 | 3 |
[6] † Cyrtoctenus wittebergensis Last Modified in 12/05/13 | 18 | 40 | 40 | 0 | 0 | 0 | 0 | 3 |
[7] † Drepanopterus abonensis Last Modified in 12/05/13 | 0 | 51 | 51 | 0 | 7 | 0 | 0 | 3 |
[8] † Drepanopterus? bembycoides Last Modified in 12/05/13 | 14 | 42 | 42 | 0 | 2 | 0 | 0 | 3 |
[9] † Drepanopterus pentlandicus Last Modified in 12/05/13 | 20 | 33 | 33 | 0 | 5 | 0 | 0 | 3 |
[10] † Hallipterus excelsior Last Modified in 12/05/13 | 39 | 19 | 19 | 0 | 0 | 0 | 0 | 3 |
[11] † Hardieopterus macrophthalmus Last Modified in 12/05/13 | 11 | 44 | 44 | 0 | 3 | 0 | 0 | 3 |
[12] † Hibbertopterus scouleri Last Modified in 12/05/13 | 7 | 47 | 47 | 0 | 4 | 0 | 0 | 3 |
[13] † Kiaeropterus cyclophthalmus Last Modified in 12/05/13 | 23 | 32 | 32 | 0 | 3 | 0 | 0 | 3 |
[14] † Kokomopterus longicaudatus Last Modified in 12/05/13 | 11 | 45 | 45 | 0 | 2 | 0 | 0 | 3 |
[15] † Lamontopterus knoxae Last Modified in 12/05/13 | 28 | 28 | 28 | 0 | 2 | 0 | 0 | 3 |
[16] † Laurieipterus elegans Last Modified in 12/05/13 | 9 | 46 | 46 | 0 | 3 | 0 | 0 | 3 |
[17] † Megarachne servinei Last Modified in 12/05/13 | 27 | 28 | 28 | 0 | 3 | 0 | 0 | 3 |
[18] † Moselopterus ancylotelson Last Modified in 12/05/13 | 4 | 52 | 52 | 0 | 2 | 0 | 0 | 3 |
[19] † Mycterops mathieui Last Modified in 12/05/13 | 44 | 14 | 14 | 0 | 0 | 0 | 0 | 3 |
[20] † Pagea sturrocki Last Modified in 12/05/13 | 11 | 43 | 43 | 0 | 4 | 0 | 0 | 3 |
[21] † Parastylonurus ornatus Last Modified in 12/05/13 | 1 | 53 | 53 | 0 | 4 | 0 | 0 | 3 |
[22] † Rhenopterus diensti Last Modified in 12/05/13 | 0 | 51 | 51 | 0 | 7 | 0 | 0 | 3 |
[23] † Stylonurella spinipes Last Modified in 12/05/13 | 12 | 42 | 42 | 0 | 4 | 0 | 0 | 3 |
[24] † Stylonurus powriensis Last Modified in 12/05/13 | 19 | 36 | 36 | 0 | 3 | 0 | 0 | 3 |
[25] † Tarsopterella scotica Last Modified in 12/05/13 | 29 | 29 | 29 | 0 | 0 | 0 | 0 | 3 |
[26] † Vinetopterus struvei Last Modified in 12/05/13 | 22 | 36 | 36 | 0 | 0 | 0 | 0 | 3 |
[27] † Woodwardopterus scabrosus Last Modified in 12/05/13 | 24 | 29 | 29 | 0 | 5 | 0 | 0 | 3 |
[28] † Eurypterus remipes Last Modified in 12/05/13 | 0 | 55 | 55 | 0 | 3 | 0 | 0 | 3 |
[29] † Hughmilleria socialis Last Modified in 12/05/13 | 0 | 57 | 57 | 0 | 1 | 0 | 0 | 3 |
[30] † Onychopterella augusti Last Modified in 12/05/13 | 13 | 44 | 44 | 0 | 1 | 0 | 0 | 3 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 38992 | |
Project overview | 3852 | |
Media views | 6476 | Media search (5544 views); M88277 (932 views); |
Matrix views | 2507 | Matrix landing page (2158 views); The systematics and phylogeny of the Stylonurina (Arthropoda: Chelicerata: Eurypterida) (349 views); |
Specimen list | 3487 | |
Taxon list | 19743 | |
Bibliography | 1340 | |
Documents list | 1587 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 383 | |
Document downloads | 2 | TNT File (1 download); Nexus file (1 download); |
Matrix downloads | 7 | The systematics and phylogeny of the Stylonurina (Arthropoda: Chelicerata: Eurypterida) (7 downloads); |
Project downloads | 374 |