Project 4790: C. E. Mitchell, M. J. Melchin, C. B. Cameron, J. Maletz. 2013. Phylogenetic analysis reveals that Rhabdopleura is an extant graptolite. Lethaia. 46 (1):34-56.
Abstract
A phylogenetic analysis of morphological data from modern pterobranch hemichordates (Cephalodiscus, Rhabdopleura) and representatives of each of the major graptolite orders reveals that Rhabdopleura nests among the benthic, encrusting graptolite taxa as it shares all of the synapomorphies that unite the graptolites. Therefore, rhabdopleurids can be regarded as extant members of the Subclass Graptolithina (Class Pterobranchia). Combined with the results of previous molecular phylogenetic studies of extant deuterostomes, these results also suggest that the Graptolithina is a sister taxon to the Subclass Cephalodiscida. The Graptolithina, as an important component of Early–Middle Palaeozoic biotas, provide data critical to our understanding of early deuterostome phylogeny. This result allows one to infer the zooid morphology, mechanics of colony growth and palaeobiology of fossil graptolites in direct relation to the living members of the clade. The Subdivision Graptoloida (nom. transl.), which are all planktic graptolites, is well supported in this analysis. In addition, we recognize the clade Eugraptolithina (nov.). This clade comprises the Graptoloida and all of the other common and well-known graptolites of the distinctive Palaeozoic fauna. Most of the graptolites traditionally regarded as tuboids and dendroids appear to be paraphyletic groups within the Eugraptolithina; however, Epigraptus is probably not a member of this clade. The Eugraptolithina appear to be derived from an encrusting, Rhabdopleura-like species, but the available information is insufficient to resolve the phylogeny of basal graptolites. The phylogenetic position of Mastigograptus and the status of the Dithecoidea and Mastigograptida also remain unresolved. Biodiversity, Cambrian, Hemichordata, Deuterostomia, Ordovician.Read the article »
Article DOI: 10.1111/j.1502-3931.2012.00319.x
Project DOI: 10.7934/P4790, http://dx.doi.org/10.7934/P4790
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 484 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 32 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:32/0 |
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MorphoBank Project 4790
MorphoBank Project 4790
- Creation Date:
28 July 2023 - Publication Date:
07 August 2023 - Project views: 2143
- Matrix downloads: 1
Authors' Institutions
- Freie Universitaet Berlin (Free University Berlin)
- Université de Montréal (University of Montreal)
- University at Buffalo SUNY
- St. Francis Xavier University
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Joyce Song Project Administrator | 17 | 1 | 1 | 32 | 0 | 0 | 484 (484, 0, 0) | 0 | 0 | 0 | ||||
Brooke Long-Fox Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29399' (17 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Acanthograptus Last Modified in 07/28/23 | 4 | 29 | 28 | 0 | 0 | 0 | 0 | 2 |
[2] † Koremagraptus Last Modified in 07/28/23 | 8 | 24 | 24 | 0 | 0 | 0 | 0 | 2 |
[3] † Anisograptus Last Modified in 07/28/23 | 0 | 32 | 32 | 0 | 0 | 0 | 0 | 2 |
[4] † Rhabdinopora Last Modified in 07/28/23 | 0 | 32 | 32 | 0 | 0 | 0 | 0 | 2 |
[5] † Dictyonema Last Modified in 07/28/23 | 3 | 30 | 29 | 0 | 0 | 0 | 0 | 2 |
[6] † Dendrograptus Last Modified in 07/28/23 | 1 | 31 | 31 | 0 | 0 | 0 | 0 | 2 |
[7] † Mastigograptus Last Modified in 07/28/23 | 3 | 29 | 29 | 0 | 0 | 0 | 0 | 2 |
[8] † Reticulograptus Last Modified in 07/28/23 | 11 | 21 | 21 | 0 | 0 | 0 | 0 | 2 |
[9] † Kozlowskitubus Last Modified in 07/28/23 | 1 | 32 | 31 | 0 | 0 | 0 | 0 | 2 |
[10] † Dendrotubus Last Modified in 07/28/23 | 9 | 23 | 23 | 0 | 0 | 0 | 0 | 2 |
[11] † Bulmanicrusta Last Modified in 07/28/23 | 1 | 33 | 31 | 0 | 0 | 0 | 0 | 2 |
[12] † Bithecocamara Last Modified in 07/28/23 | 9 | 23 | 23 | 0 | 0 | 0 | 0 | 2 |
[13] † Cysticamara Last Modified in 07/28/23 | 9 | 23 | 23 | 0 | 0 | 0 | 0 | 2 |
[14] † Epigraptus Last Modified in 07/28/23 | 3 | 29 | 29 | 0 | 0 | 0 | 0 | 2 |
[15] † Rhabdopleura Last Modified in 07/28/23 | 0 | 32 | 32 | 0 | 0 | 0 | 0 | 2 |
[16] † Cephalodiscus Last Modified in 07/28/23 | 3 | 29 | 29 | 0 | 0 | 0 | 0 | 2 |
[17] † Cephalodiscus Last Modified in 07/28/23 | 0 | 32 | 32 | 0 | 0 | 0 | 0 | 2 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 2143 | |
Project overview | 178 | |
Bibliography | 83 | |
Matrix views | 147 | Matrix landing page (139 views); Matrix (8 views); |
Media views | 509 | Media search (434 views); M890433 (75 views); |
Views for media list | 130 | |
Documents list | 117 | |
Specimen list | 261 | |
Taxon list | 718 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 1 | |
Matrix downloads | 1 | Matrix (1 download); |