Project 4776: L. Marivaux, M. Adaci, M. Bensalah, H. G. Rodrigues, L. Hautier, M. Mahboubi, F. Mebrouk, R. Tabuce, M. Vianey-Liaud. 2011. Zegdoumyidae (Rodentia, Mammalia), stem anomaluroid rodents from the Early to Middle Eocene of Algeria (Gour Lazib, Western Sahara): new dental evidence. Journal of Systematic Palaeontology. 9 (4):563-588.
Abstract
The Palaeogene fossil record of rodents in Africa is very poor compared to that of North America or Eurasia. Despite this, Africa has long appeared to be a centre of adaptive radiation for two distinct groups of Rodentia: Hystricognathi and Anomaluroidea. The >45-million-year-old enigmatic Zegdoumyidae is the oldest and only rodent family known of this age from Africa (Algeria and Tunisia). Zegdoumyids have been tentatively regarded as a possible early African stem group for Anomaluridae, a link that has never been clearly established because of the highly fragmentary nature of zegdoumyid fossils, as well as the major temporal and morphological gaps between zegdoumyids and the first true anomaluroids from the Late Eocene. About 200 rodent teeth have been sorted after acid treatment of indurated sediments from several new localities in the Gour Lazib of western Algeria dating from the late Early or early Middle Eocene. These new fossils allow us to better describe the morphology of the Zegdoumyidae (especially Glibia and Zegdoumys) and to identify a new taxon, Lazibemys zegdouensis gen. et sp. nov. With this material, we investigated the phylogenetic position of the Zegdoumyidae in a high-level rodent phylogeny with cladistic assessment of the dental evidence. Our analyses have yielded six equally most-parsimonious trees in which zegdoumyids represent the earliest offshoots (pectinately arranged) of a large clade that embraces Eocene anomaluroids plus stem and crown Anomaluridae. This phylogenetic assumption underscores the great antiquity of the Anomaluroidea clade in Africa, as expected given the high morphological divergence of the Late Eocene African anomaluroids. Zegdoumyids exhibit a variety of dental morphologies and provide some suggestions on evolutionary trends within the Anomaluroidea (early stages of pentalophodonty, incisor enamel microstructure transitional from the pauciserial to the uniserial condition). The source of Zegdoumyidae is still unclear inasmuch as there is no well-identified sister group among early Palaeogene rodents. Zegdoumyids seem to share a common ancestry with both stem Myodonta and North American Sciuravidae. Given the high degree of dental specialization of zegdoumyids, we cannot exclude the possibility that zegdoumyids are rooted in a more primitive, as yet unknown, African rodent lineage older than the Early-Middle Eocene.Read the article »
Article DOI: 10.1080/14772019.2011.562555
Project DOI: 10.7934/P4776, http://dx.doi.org/10.7934/P4776
This project contains | Matrices |
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Download Project SDD File | Total scored cells: 5330 Total media associated with cells: 0 Total labels associated with cell media: 0 |
Characters | |
Total characters: 150 Total characters with associated media: 0 Total characters with media with labels: 0 Total character states: 423 Total character states with associated media: 0 Total character states with media with labels:0 Total unordered/ordered characters:150/0 |
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MorphoBank Project 4776
MorphoBank Project 4776
- Creation Date:
25 July 2023 - Publication Date:
01 August 2023 - Project views: 3048
- Matrix downloads: 5
Authors' Institutions
- University of Cambridge
- Universite de Montpellier
- Université de Lyon (University of Lyon)
- Université Abou Bekr Belkaïd
- Université d’Oran
Members
member name | taxa | specimens | media | chars | character
| cell scorings (scored, NPA, "-") | cell
| rules | ||||||
Shreya Jariwala Project Administrator | 40 | 2 | 2 | 150 | 0 | 0 | 5330 (4778, 0, 552) | 0 | 0 | 0 |
Taxonomic Overview for Matrix 'M29395' (40 Taxa)
taxon | unscored cells |
scored cells |
no cell support |
NPA cells |
"-" cells | cell images | labels on cell images |
member access |
[1] † Pedetes capensis Last Modified in 07/27/23 | 23 | 120 | 119 | 0 | 8 | 0 | 0 | 1 |
[2] † Anomalurus sp. Last Modified in 07/27/23 | 17 | 136 | 132 | 0 | 1 | 0 | 0 | 1 |
[3] † Anomalurus peli Last Modified in 07/27/23 | 17 | 136 | 132 | 0 | 1 | 0 | 0 | 1 |
[4] † Anomalurops beecrofti Last Modified in 07/27/23 | 23 | 122 | 122 | 0 | 5 | 0 | 0 | 1 |
[5] † Anomalurus derbianus Last Modified in 07/27/23 | 23 | 125 | 125 | 0 | 2 | 0 | 0 | 1 |
[6] † Idiurus macrotis Last Modified in 07/27/23 | 22 | 128 | 127 | 0 | 1 | 0 | 0 | 1 |
[7] † Zenkerella insignis Last Modified in 07/27/23 | 26 | 107 | 107 | 0 | 17 | 0 | 0 | 1 |
[8] † Paranomalurus walkeri Last Modified in 07/27/23 | 25 | 122 | 122 | 0 | 3 | 0 | 0 | 1 |
[9] † Paranomalurus bishopi Last Modified in 07/27/23 | 23 | 127 | 126 | 0 | 1 | 0 | 0 | 1 |
[10] † Paranomalurus soniae Last Modified in 07/27/23 | 26 | 121 | 119 | 0 | 5 | 0 | 0 | 1 |
[11] † Kabirmys qarunensis Last Modified in 07/27/23 | 7 | 148 | 143 | 0 | 0 | 0 | 0 | 1 |
[12] † Shazurus minutus Last Modified in 07/27/23 | 26 | 126 | 124 | 0 | 0 | 0 | 0 | 1 |
[13] † Pondaungimys anomaluropsis Last Modified in 07/27/23 | 15 | 140 | 135 | 0 | 0 | 0 | 0 | 1 |
[14] † Nementchamys lavocati Last Modified in 07/27/23 | 18 | 138 | 132 | 0 | 0 | 0 | 0 | 1 |
[15] † Glibia pentalopha Last Modified in 07/27/23 | 16 | 147 | 134 | 0 | 0 | 0 | 0 | 1 |
[16] † Zegdoumys lavocati Last Modified in 07/27/23 | 1 | 147 | 140 | 0 | 9 | 0 | 0 | 1 |
[17] † Glibemys algeriensis Last Modified in 07/27/23 | 113 | 37 | 37 | 0 | 0 | 0 | 0 | 1 |
[18] † Lazibemys zegdouensis Last Modified in 07/27/23 | 86 | 64 | 63 | 0 | 1 | 0 | 0 | 1 |
[19] † Pappocricetodon Last Modified in 07/27/23 | 1 | 86 | 85 | 0 | 64 | 0 | 0 | 1 |
[20] † Atavocricetodon Last Modified in 07/27/23 | 0 | 90 | 87 | 0 | 63 | 0 | 0 | 1 |
[21] † Plesiosminthus Last Modified in 07/27/23 | 8 | 93 | 90 | 0 | 52 | 0 | 0 | 1 |
[22] † Aksyiromys Last Modified in 07/27/23 | 38 | 79 | 73 | 0 | 39 | 0 | 0 | 1 |
[23] † Andersomys Last Modified in 07/27/23 | 23 | 124 | 121 | 0 | 6 | 0 | 0 | 1 |
[24] † Pantrogna Last Modified in 07/27/23 | 2 | 141 | 134 | 0 | 14 | 0 | 0 | 1 |
[25] † Hartenbergeromys Last Modified in 07/27/23 | 7 | 132 | 127 | 0 | 16 | 0 | 0 | 1 |
[26] † Protadelomys Last Modified in 07/27/23 | 1 | 142 | 137 | 0 | 12 | 0 | 0 | 1 |
[27] † Knightomys Last Modified in 07/27/23 | 19 | 125 | 120 | 0 | 11 | 0 | 0 | 1 |
[28] † Prolapsus Last Modified in 07/27/23 | 23 | 114 | 110 | 0 | 17 | 0 | 0 | 1 |
[29] † Pauromys Last Modified in 07/27/23 | 7 | 131 | 125 | 0 | 18 | 0 | 0 | 1 |
[30] † Eogliravus Last Modified in 07/27/23 | 9 | 127 | 126 | 0 | 15 | 0 | 0 | 1 |
[31] † Glamys Last Modified in 07/27/23 | 6 | 127 | 127 | 0 | 17 | 0 | 0 | 1 |
[32] † Bransatoglis Last Modified in 07/27/23 | 6 | 129 | 129 | 0 | 15 | 0 | 0 | 1 |
[33] † Paleosciurus Last Modified in 07/27/23 | 1 | 136 | 134 | 0 | 15 | 0 | 0 | 1 |
[34] † Prosciurus Last Modified in 07/27/23 | 23 | 111 | 111 | 0 | 16 | 0 | 0 | 1 |
[35] † Reithroparamys Last Modified in 07/27/23 | 17 | 120 | 119 | 0 | 14 | 0 | 0 | 1 |
[36] † Acritoparamys Last Modified in 07/27/23 | 19 | 119 | 117 | 0 | 14 | 0 | 0 | 1 |
[37] † Birbalomys Last Modified in 07/27/23 | 0 | 143 | 136 | 0 | 14 | 0 | 0 | 1 |
[38] † Cocomys Last Modified in 07/27/23 | 15 | 109 | 109 | 0 | 26 | 0 | 0 | 1 |
[39] † Tribosphenomys Last Modified in 07/27/23 | 26 | 108 | 108 | 0 | 16 | 0 | 0 | 1 |
[40] † Archetypomys Last Modified in 07/27/23 | 28 | 101 | 98 | 0 | 24 | 0 | 0 | 1 |
Project views
type | number of views | Individual items viewed (where applicable) |
Total project views | 3048 | |
Media views | 592 | Media search (437 views); M890424 (78 views); M890425 (77 views); |
Matrix views | 166 | Matrix landing page (157 views); Maurivaux et al 2011 (9 views); |
Project overview | 264 | |
Documents list | 154 | |
Taxon list | 1162 | |
Specimen list | 418 | |
Views for media list | 177 | |
Bibliography | 115 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 5 | |
Matrix downloads | 5 | Maurivaux et al 2011 (5 downloads); |