Project 4787: J. M. Adrain. 1998. Systematics of the Acanthoparyphinae (Trilobita), with species from the Silurian of Arctic Canada. Journal of Paleontology. 72 (4):698–71.
Abstract
Cladistic analysis of the trilobite subfamily Acanthoparyphinae Whittington and Evitt, 1954, yields an explicit hypothesis of relationship for the group. All Silurian species together form a robustly supported monophylum including the genera Hyrokybe Lane, 1972, Parayoungia Chatterton and Perry, 1984, and Youngia Lindstrom, 1885. Sister to this is the Ordovician type species of Acanthoparypha Whittington and Evitt, 1954. Remaining species that have historically been assigned to either Acanthoparypha or Pandaspinapyga Esker and Levin, 1964, form a rather labile paraphylum. Nevertheless, the entire group thus identified is definitely monophyletic, and supported by several prominent synapomorphic character-states. The basal structure and basal node of the subfamily are more difficult to assess. The relationships of the genera Hammannopyge Pribyl, Vanek, and Pek, 1985, Holia Bradley, 1930, and Nieszkowskia Schmidt, 1881, need to be addressed within the wider context of the family as a whole. The traditional assignment of Holia to the acanthoparyphines is followed. Wenlock acanthoparyphines from the Cape Phillips Formation of the central Canadian Arctic islands include several species of Hyrokybe and Parayoungia. They are similar to, and in one case conspecific with, coeval forms to the southwest in the southern Mackenzie Mountains. Five species are new: Holia glabra, Hyrokybe lightfooti, Hyrokybe youngi, Hyrokybe mitchellae, and Parayoungia mclaughlini. At least four other potentially new species are reported in open nomenclature.Read the article »
Article DOI: 10.1017/S0022336000040403
Project DOI: 10.7934/P4787, http://dx.doi.org/10.7934/P4787
This project contains | Matrices |
---|---|
Download Project SDD File | Total scored cells: 881 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 39 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 90 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:39/0 |
Currently Viewing:
MorphoBank Project 4787
MorphoBank Project 4787
- Creation Date:
27 July 2023 - Publication Date:
12 March 2024 - Project views: 482
Authors' Institutions
- Natural History Museum, London
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Shreya Jariwala Project Administrator | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | ||||
Brooke Long-Fox Full membership | 24 | 1 | 1 | 39 | 0 | 0 | 881 (881, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29705' (24 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Holia anacantha Last Modified in 03/12/24 | 9 | 30 | 30 | 0 | 0 | 0 | 0 | 2 |
[2] † Youngia boucoti Last Modified in 03/12/24 | 1 | 38 | 38 | 0 | 0 | 0 | 0 | 2 |
[3] † Parayoungia brennardi Last Modified in 03/12/24 | 4 | 35 | 35 | 0 | 0 | 0 | 0 | 2 |
[4] † Acanthoparypha chiropyga Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[5] † Holia cimelia Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[6] † Hyrokybe lightfooti Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[7] † Hyrokybe copelandi Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[8] † Acanthoparypha echinoderma Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[9] † Parayoungia eleyae Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[10] † Acanthoparypha evitti Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[11] † Parayoungia folinsbeei Last Modified in 03/12/24 | 8 | 31 | 31 | 0 | 0 | 0 | 0 | 2 |
[12] † Acanthoparypha goniopyga Last Modified in 03/12/24 | 7 | 32 | 32 | 0 | 0 | 0 | 0 | 2 |
[13] † Parayoungia mclaughlini Last Modified in 03/12/24 | 6 | 33 | 33 | 0 | 0 | 0 | 0 | 2 |
[14] † Hyrokybe hadnagyi Last Modified in 03/12/24 | 1 | 38 | 38 | 0 | 0 | 0 | 0 | 2 |
[15] † Youngia johnsoni Last Modified in 03/12/24 | 1 | 38 | 38 | 0 | 0 | 0 | 0 | 2 |
[16] † Hyrokybe julli Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[17] † Youngia kathyae Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[18] † Hyrokybe lenzi Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[19] † Acanthoparypha perforata Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[20] † Pandaspinapyga salsa Last Modified in 03/12/24 | 6 | 33 | 33 | 0 | 0 | 0 | 0 | 2 |
[21] † Holia secristi Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[22] † Youngia steineri Last Modified in 03/12/24 | 0 | 39 | 39 | 0 | 0 | 0 | 0 | 2 |
[23] † Parayoungia tuberculata Last Modified in 03/12/24 | 6 | 33 | 33 | 0 | 0 | 0 | 0 | 2 |
[24] † Hammannopyge unica Last Modified in 03/12/24 | 6 | 33 | 33 | 0 | 0 | 0 | 0 | 2 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 482 | |
Project overview | 45 | |
Documents list | 38 | |
Taxon list | 112 | |
Matrix views | 36 | Matrix landing page (35 views); PBDB (1 view); |
Specimen list | 60 | |
Media views | 127 | Media search (108 views); M902639 (19 views); |
Bibliography | 28 | |
Views for media list | 36 |