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 - Matrix downloads: 7
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 Taxon name last Modified on 07/27/23 | 23 | 120 | 119 | 0 | 8 | 0 | 0 | 1 |
[2] † Anomalurus sp. Taxon name last Modified on 07/27/23 | 17 | 136 | 132 | 0 | 1 | 0 | 0 | 1 |
[3] † Anomalurus peli Taxon name last Modified on 07/27/23 | 17 | 136 | 132 | 0 | 1 | 0 | 0 | 1 |
[4] † Anomalurops beecrofti Taxon name last Modified on 07/27/23 | 23 | 122 | 122 | 0 | 5 | 0 | 0 | 1 |
[5] † Anomalurus derbianus Taxon name last Modified on 07/27/23 | 23 | 125 | 125 | 0 | 2 | 0 | 0 | 1 |
[6] † Idiurus macrotis Taxon name last Modified on 07/27/23 | 22 | 128 | 127 | 0 | 1 | 0 | 0 | 1 |
[7] † Zenkerella insignis Taxon name last Modified on 07/27/23 | 26 | 107 | 107 | 0 | 17 | 0 | 0 | 1 |
[8] † Paranomalurus walkeri Taxon name last Modified on 07/27/23 | 25 | 122 | 122 | 0 | 3 | 0 | 0 | 1 |
[9] † Paranomalurus bishopi Taxon name last Modified on 07/27/23 | 23 | 127 | 126 | 0 | 1 | 0 | 0 | 1 |
[10] † Paranomalurus soniae Taxon name last Modified on 07/27/23 | 26 | 121 | 119 | 0 | 5 | 0 | 0 | 1 |
[11] † Kabirmys qarunensis Taxon name last Modified on 07/27/23 | 7 | 148 | 143 | 0 | 0 | 0 | 0 | 1 |
[12] † Shazurus minutus Taxon name last Modified on 07/27/23 | 26 | 126 | 124 | 0 | 0 | 0 | 0 | 1 |
[13] † Pondaungimys anomaluropsis Taxon name last Modified on 07/27/23 | 15 | 140 | 135 | 0 | 0 | 0 | 0 | 1 |
[14] † Nementchamys lavocati Taxon name last Modified on 07/27/23 | 18 | 138 | 132 | 0 | 0 | 0 | 0 | 1 |
[15] † Glibia pentalopha Taxon name last Modified on 07/27/23 | 16 | 147 | 134 | 0 | 0 | 0 | 0 | 1 |
[16] † Zegdoumys lavocati Taxon name last Modified on 07/27/23 | 1 | 147 | 140 | 0 | 9 | 0 | 0 | 1 |
[17] † Glibemys algeriensis Taxon name last Modified on 07/27/23 | 113 | 37 | 37 | 0 | 0 | 0 | 0 | 1 |
[18] † Lazibemys zegdouensis Taxon name last Modified on 07/27/23 | 86 | 64 | 63 | 0 | 1 | 0 | 0 | 1 |
[19] † Pappocricetodon Taxon name last Modified on 07/27/23 | 1 | 86 | 85 | 0 | 64 | 0 | 0 | 1 |
[20] † Atavocricetodon Taxon name last Modified on 07/27/23 | 0 | 90 | 87 | 0 | 63 | 0 | 0 | 1 |
[21] † Plesiosminthus Taxon name last Modified on 07/27/23 | 8 | 93 | 90 | 0 | 52 | 0 | 0 | 1 |
[22] † Aksyiromys Taxon name last Modified on 07/27/23 | 38 | 79 | 73 | 0 | 39 | 0 | 0 | 1 |
[23] † Andersomys Taxon name last Modified on 07/27/23 | 23 | 124 | 121 | 0 | 6 | 0 | 0 | 1 |
[24] † Pantrogna Taxon name last Modified on 07/27/23 | 2 | 141 | 134 | 0 | 14 | 0 | 0 | 1 |
[25] † Hartenbergeromys Taxon name last Modified on 07/27/23 | 7 | 132 | 127 | 0 | 16 | 0 | 0 | 1 |
[26] † Protadelomys Taxon name last Modified on 07/27/23 | 1 | 142 | 137 | 0 | 12 | 0 | 0 | 1 |
[27] † Knightomys Taxon name last Modified on 07/27/23 | 19 | 125 | 120 | 0 | 11 | 0 | 0 | 1 |
[28] † Prolapsus Taxon name last Modified on 07/27/23 | 23 | 114 | 110 | 0 | 17 | 0 | 0 | 1 |
[29] † Pauromys Taxon name last Modified on 07/27/23 | 7 | 131 | 125 | 0 | 18 | 0 | 0 | 1 |
[30] † Eogliravus Taxon name last Modified on 07/27/23 | 9 | 127 | 126 | 0 | 15 | 0 | 0 | 1 |
[31] † Glamys Taxon name last Modified on 07/27/23 | 6 | 127 | 127 | 0 | 17 | 0 | 0 | 1 |
[32] † Bransatoglis Taxon name last Modified on 07/27/23 | 6 | 129 | 129 | 0 | 15 | 0 | 0 | 1 |
[33] † Paleosciurus Taxon name last Modified on 07/27/23 | 1 | 136 | 134 | 0 | 15 | 0 | 0 | 1 |
[34] † Prosciurus Taxon name last Modified on 07/27/23 | 23 | 111 | 111 | 0 | 16 | 0 | 0 | 1 |
[35] † Reithroparamys Taxon name last Modified on 07/27/23 | 17 | 120 | 119 | 0 | 14 | 0 | 0 | 1 |
[36] † Acritoparamys Taxon name last Modified on 07/27/23 | 19 | 119 | 117 | 0 | 14 | 0 | 0 | 1 |
[37] † Birbalomys Taxon name last Modified on 07/27/23 | 0 | 143 | 136 | 0 | 14 | 0 | 0 | 1 |
[38] † Cocomys Taxon name last Modified on 07/27/23 | 15 | 109 | 109 | 0 | 26 | 0 | 0 | 1 |
[39] † Tribosphenomys Taxon name last Modified on 07/27/23 | 26 | 108 | 108 | 0 | 16 | 0 | 0 | 1 |
[40] † Archetypomys Taxon name last Modified on 07/27/23 | 28 | 101 | 98 | 0 | 24 | 0 | 0 | 1 |
Project downloads
type | number of downloads | Individual items downloaded (where applicable) |
Total downloads from project | 7 | |
Matrix downloads | 7 | Maurivaux et al 2011 (7 downloads); |