Project 586: J. C. Lamsdell. 2013. Redescription of Drepanopterus pentlandicus Laurie 1892, the earliest known hibbertopteroid (Chelicerata : Eurypterida) from the early Silurian (Llandovery) of the Pentland Hills, Scotland. Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 103:77–103.
Abstract
Drepanopterus pentlandicus Laurie, 1892 is redescribed from the original type material along with previously unfigured specimens. A cleft metastoma is confirmed as a characteristic of the genus along with the armature of the second and third prosomal appendages being modified into flattened blades, while the species is shown to possess an enlarged second tergite and prosomal posterolateral lobes. Different ontogenetic stages of D. pentlandicus are described and it is revealed that these latter characters develop only later in ontogeny, suggesting that described specimens of Drepanopterus abonensis Simpson, 1951 may represent juveniles. Cladistic analysis of Stylonurina shows the genus Drepanopterus is monophyletic and consists of D. pentlandicus, D. abonensis and D. odontospathus sp. nov., and forms a basal clade of mycteropoids. Hibbertopteroidea Kjellesvig-Waering, 1959 is shown to be a junior subjective synonym of Mycteropoidea Cope, 1886, with the synonymy of many of the hibbertopterid genera hypothesised and Hibbertopterus Kjellesvig-Waering, 1959 suggested to represent juvenile specimens of Cyrtoctenus Størmer & Waterston, 1968. Hibbertopterus permianus Ponomarenko, 1985 is transferred to Campylocephalus Eichwald, 1860. The role of heterochrony in the morphological development of the mycteropoid lineage is discussed, with both hibbertopterids and mycteropids being hypertrophic and pre displacement peramorphs respectively that lie along peramorphoclines.Read the article »
Project DOI: 10.7934/P586, http://dx.doi.org/10.7934/P586
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 2120 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 80 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 162 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:80/0 |
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MorphoBank Project 586
MorphoBank Project 586
- Creation Date:
19 September 2011 - Publication Date:
02 May 2013 - Project views: 40049
- Matrix downloads: 7
Authors' Institutions
- University of Kansas
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
James Lamsdell Project Administrator | 36 | 1 | 1 | 80 | 0 | 0 | 2120 (1958, 0, 162) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M1535' (36 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 | 71 | 71 | 0 | 9 | 0 | 0 | 1 |
[2] † Alkenopterus brevitelson Last Modified in 12/05/13 | 19 | 56 | 56 | 0 | 5 | 0 | 0 | 1 |
[3] † Brachyopterella pentagonalis Last Modified in 12/05/13 | 23 | 50 | 50 | 0 | 7 | 0 | 0 | 1 |
[4] † Brachyopterus stubblefieldi Last Modified in 12/05/13 | 11 | 62 | 62 | 0 | 7 | 0 | 0 | 1 |
[5] † Ctenopterus cestrotus Last Modified in 12/05/13 | 15 | 59 | 59 | 0 | 6 | 0 | 0 | 1 |
[6] † Cyrtoctenus wittebergensis Last Modified in 12/05/13 | 19 | 61 | 61 | 0 | 0 | 0 | 0 | 1 |
[7] † Drepanopterus abonensis Last Modified in 12/05/13 | 1 | 72 | 72 | 0 | 7 | 0 | 0 | 1 |
[8] † Stoermeropterus conicus Last Modified in 12/05/13 | 1 | 74 | 74 | 0 | 5 | 0 | 0 | 1 |
[9] † Drepanopterus pentlandicus Last Modified in 12/05/13 | 9 | 65 | 65 | 0 | 6 | 0 | 0 | 1 |
[10] † Hallipterus excelsior Last Modified in 12/05/13 | 45 | 33 | 33 | 0 | 2 | 0 | 0 | 1 |
[11] † Hardieopterus macrophthalmus Last Modified in 12/05/13 | 12 | 63 | 63 | 0 | 5 | 0 | 0 | 1 |
[12] † Hibbertopterus scouleri Last Modified in 12/05/13 | 7 | 69 | 69 | 0 | 4 | 0 | 0 | 1 |
[13] † Kiaeropterus cyclophthalmus Last Modified in 12/05/13 | 29 | 46 | 46 | 0 | 5 | 0 | 0 | 1 |
[14] † Kokomopterus longicaudatus Last Modified in 12/05/13 | 12 | 63 | 63 | 0 | 5 | 0 | 0 | 1 |
[15] † Lamontopterus knoxae Last Modified in 12/05/13 | 32 | 45 | 45 | 0 | 3 | 0 | 0 | 1 |
[16] † Laurieipterus elegans Last Modified in 12/05/13 | 10 | 64 | 64 | 0 | 6 | 0 | 0 | 1 |
[17] † Megarachne servinei Last Modified in 12/05/13 | 34 | 42 | 42 | 0 | 4 | 0 | 0 | 1 |
[18] † Moselopterus ancylotelson Last Modified in 12/05/13 | 4 | 71 | 71 | 0 | 5 | 0 | 0 | 1 |
[19] † Mycterops mathieui Last Modified in 12/05/13 | 55 | 24 | 24 | 0 | 1 | 0 | 0 | 1 |
[20] † Pagea sturrocki Last Modified in 12/05/13 | 7 | 66 | 66 | 0 | 7 | 0 | 0 | 1 |
[21] † Parastylonurus ornatus Last Modified in 12/05/13 | 1 | 72 | 72 | 0 | 7 | 0 | 0 | 1 |
[22] † Rhenopterus diensti Last Modified in 12/05/13 | 0 | 70 | 70 | 0 | 10 | 0 | 0 | 1 |
[23] † Stylonurella spinipes Last Modified in 12/05/13 | 13 | 60 | 60 | 0 | 7 | 0 | 0 | 1 |
[24] † Stylonurus powriensis Last Modified in 12/05/13 | 21 | 54 | 54 | 0 | 5 | 0 | 0 | 1 |
[25] † Tarsopterella scotica Last Modified in 12/05/13 | 33 | 45 | 45 | 0 | 2 | 0 | 0 | 1 |
[26] † Vinetopterus struvei Last Modified in 12/05/13 | 23 | 55 | 55 | 0 | 2 | 0 | 0 | 1 |
[27] † Woodwardopterus scabrosus Last Modified in 12/05/13 | 27 | 47 | 47 | 0 | 6 | 0 | 0 | 1 |
[28] † Eurypterus remipes Last Modified in 12/05/13 | 0 | 74 | 74 | 0 | 6 | 0 | 0 | 1 |
[29] † Hughmilleria socialis Last Modified in 12/05/13 | 0 | 76 | 76 | 0 | 4 | 0 | 0 | 1 |
[30] † Onychopterella augusti Last Modified in 12/05/13 | 14 | 62 | 62 | 0 | 4 | 0 | 0 | 1 |
[31] † Pagea plotnicki Last Modified in 12/05/13 | 24 | 52 | 52 | 0 | 4 | 0 | 0 | 1 |
[32] † Leiopterella tetliei Last Modified in 12/05/13 | 38 | 39 | 39 | 0 | 3 | 0 | 0 | 1 |
[33] † Pagea symondsii Last Modified in 12/05/13 | 49 | 28 | 28 | 0 | 3 | 0 | 0 | 1 |
[34] † Drepanopterus odontospathus Last Modified in 12/05/13 | 52 | 28 | 28 | 0 | 0 | 0 | 0 | 1 |
[35] † Campylocephalus oculatus Last Modified in 12/05/13 | 54 | 26 | 26 | 0 | 0 | 0 | 0 | 1 |
[36] † Hastimima whitei Last Modified in 12/05/13 | 66 | 14 | 14 | 0 | 0 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 40049 | |
Project overview | 4635 | |
Media views | 6937 | Media search (6053 views); M99262 (884 views); |
Matrix views | 2973 | Matrix landing page (2671 views); Revised stylonurine phylogeny with further focus on Mycteropoidea (302 views); |
Specimen list | 3360 | |
Taxon list | 21120 | |
Bibliography | 1019 | |
Documents list | 5 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 339 | |
Project downloads | 332 | |
Matrix downloads | 7 | Revised stylonurine phylogeny with further focus on Mycteropoidea (7 downloads); |