Project 908: M. A. Wills, R.A. Jenner, C. N. Dhubhghaill. 2009. Eumalacostracan Evolution: Conflict between Three Sources of Data. Arthropod Systematics & Phylogeny. 67 (1):71-90.
Abstract
There is no consensus on the inter-ordinal relationships of eumalacostracans, despite the recent synthesis of several morphological matrices with data from four molecular markers. Signals from different molecules conflict with each other, and all are conspicuously at odds with morphology. Can fossils help to resolve the problem? Here, we utilize palaeontological data in two ways. Firstly we coded a selection of fossil taxa into our morphological matrix, and assessed their impact upon inferred phylogeny relative to that of their living counterparts (first order jackknifing). This revealed that our morphological tree is very sensitive to the precise taxon sample (a problem that must be addressed in future studies), but that our fossil groups were not disproportionately influential. Secondly, we asked whether the order in which groups appear in the fossil record provides a means to choose between competing trees. The congruence between morphological and stratigraphic signals was extremely weak and non-significant in most cases, precluding the use of fossil dates in this way. Many trees imply ghost ranges of duration near the theoretical maximum, and worse than for the majority of other animal groups so far investigated. An incomplete fossil record and fragile/weakly-supported trees combine with considerable molecular rate heterogeneity to make the Eumalacostraca extremely poorly suited to molecular clock studies. Future insights into their phylogeny are likely to come from the development of new molecular markers, as well as hard-won data on internal anatomy and ultrastructure.Read the article »
Project DOI: 10.7934/P908, http://dx.doi.org/10.7934/P908
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 4529 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 177 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 444 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:177/0 |
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MorphoBank Project 908
MorphoBank Project 908
- Creation Date:
18 March 2013 - Publication Date:
10 March 2014 - Project views: 27132
- Matrix downloads: 3
Authors' Institutions
- Natural History Museum, London
- University of Bath
Members
member name | taxa | specimens | media | media notes | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||||
Jo Wolfe Project Administrator | 31 | 1 | 1 | 0 | 177 | 0 | 0 | 0 | 4529 (4202, 0, 327) | 0 | 0 | 0 | |||||
Ronald Jenner Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 | |||||
Matthew Wills Full membership | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 (0, 0, 0) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M2014' (30 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Acanthotelson Last Modified in 12/05/13 | 71 | 97 | 96 | 0 | 10 | 0 | 0 | 3 |
[2] † Aeschronectida Last Modified in 12/05/13 | 77 | 92 | 92 | 0 | 8 | 0 | 0 | 3 |
[3] Amphionidacea Last Modified in 12/05/13 | 42 | 128 | 128 | 0 | 7 | 0 | 0 | 3 |
[4] Amphipoda Last Modified in 12/05/13 | 2 | 164 | 156 | 0 | 19 | 0 | 0 | 3 |
[5] Anaspidacea Last Modified in 12/05/13 | 3 | 166 | 165 | 0 | 9 | 0 | 0 | 3 |
[6] † Angustidontus Last Modified in 12/05/13 | 107 | 76 | 70 | 0 | 0 | 0 | 0 | 3 |
[7] Anostraca Last Modified in 12/05/13 | 14 | 139 | 137 | 0 | 26 | 0 | 0 | 3 |
[8] Bathynellacea Last Modified in 12/05/13 | 31 | 128 | 126 | 0 | 20 | 0 | 0 | 3 |
[9] † Belotelsonidea Last Modified in 12/05/13 | 99 | 70 | 70 | 0 | 8 | 0 | 0 | 3 |
[10] Bochusacea Last Modified in 12/05/13 | 45 | 125 | 118 | 0 | 14 | 0 | 0 | 3 |
[11] Brachypoda Last Modified in 12/05/13 | 22 | 129 | 129 | 0 | 26 | 0 | 0 | 3 |
[12] Caridea Last Modified in 12/05/13 | 0 | 171 | 169 | 0 | 8 | 0 | 0 | 3 |
[13] Cumacea Last Modified in 12/05/13 | 11 | 163 | 159 | 0 | 7 | 0 | 0 | 3 |
[14] Dendrobranchiata Last Modified in 12/05/13 | 1 | 168 | 167 | 0 | 9 | 0 | 0 | 3 |
[15] Euphausiacea Last Modified in 12/05/13 | 2 | 171 | 170 | 0 | 5 | 0 | 0 | 3 |
[16] Euzygida Last Modified in 12/05/13 | 27 | 144 | 144 | 0 | 6 | 0 | 0 | 3 |
[17] Isopoda Last Modified in 12/05/13 | 1 | 167 | 161 | 0 | 15 | 0 | 0 | 3 |
[18] Leptostraca Last Modified in 12/05/13 | 4 | 162 | 161 | 0 | 12 | 0 | 0 | 3 |
[19] Lophogastrida Last Modified in 12/05/13 | 14 | 161 | 161 | 0 | 2 | 0 | 0 | 3 |
[20] Mictocaris Last Modified in 12/05/13 | 37 | 126 | 125 | 0 | 15 | 0 | 0 | 3 |
[21] Mysida Last Modified in 12/05/13 | 1 | 182 | 174 | 0 | 2 | 0 | 0 | 3 |
[22] Notostraca Last Modified in 12/05/13 | 21 | 135 | 135 | 0 | 21 | 0 | 0 | 3 |
[23] † Palaeocaris Last Modified in 12/05/13 | 71 | 101 | 98 | 0 | 8 | 0 | 0 | 3 |
[24] Procaridea Last Modified in 12/05/13 | 19 | 154 | 154 | 0 | 4 | 0 | 0 | 3 |
[25] † Pygocephalomorpha Last Modified in 12/05/13 | 98 | 77 | 75 | 0 | 4 | 0 | 0 | 3 |
[26] Reptantia Last Modified in 12/05/13 | 0 | 173 | 168 | 0 | 9 | 0 | 0 | 3 |
[27] Spelaeogriphacea Last Modified in 12/05/13 | 31 | 146 | 133 | 0 | 13 | 0 | 0 | 3 |
[28] Stomatopoda Last Modified in 12/05/13 | 3 | 160 | 159 | 0 | 15 | 0 | 0 | 3 |
[29] Tanaidacea Last Modified in 12/05/13 | 3 | 174 | 164 | 0 | 10 | 0 | 0 | 3 |
[30] Thermosbaenacea Last Modified in 12/05/13 | 13 | 153 | 149 | 0 | 15 | 0 | 0 | 3 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 27132 | |
Project overview | 4318 | |
Media views | 7631 | Media search (6216 views); M326558 (1415 views); |
Matrix views | 3097 | Matrix landing page (2709 views); Emalacostracan evolution: conflict between three sources of data (388 views); |
Taxon list | 6796 | |
Specimen list | 3401 | |
Views for media list | 1886 | |
Documents list | 3 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 326 | |
Matrix downloads | 3 | Emalacostracan evolution: conflict between three sources of data (3 downloads); |
Project downloads | 323 |