# 2009 in paleomammalogy

This paleomammalogy list records new fossil mammal taxa that were described during the year 2009, as well as notes other significant paleomammalogy discoveries and events which occurred during that year.

## Mammals

* A study by J. R. Foster is published estimating the body masses of mammals from the Late Jurassic Morrison Formation by using the ratio of dentary length to body mass of modern marsupials as a reference. Foster concludes that Docodon was the most massive mammal genus of the formation at 141g and Fruitafossor was the least massive at 6g. The average Morrison mammal had a mass of 48.5g. A graph of the body mass distribution of Morrison mammal genera produced a right-skewed curve, meaning that there were more low-mass genera.
* Fujiwara, S. I. (2009). "Olecranon orientation as an indicator of elbow joint angle in the stance phase, and estimation of forelimb posture in extinct quadruped animals". Journal of Morphology. 270 (9): 1107–1121. doi:10.1002/jmor.10748. PMID 19378290. S2CID 23878624.
* Fujiwara, S. I.; Kuwazuru, O.; Inuzuka, N.; Yochikawa, N. (2009). "Relationship between scapular position and structural strength of rib cage in quadruped animals". Journal of Morphology. 270 (9): 1084–1094. doi:10.1002/jmor.10744. PMID 19378269. S2CID 5574036.
* Mitchell, G.; van Sittert, S.J.; Skinner, J.D. (2009). "Sexual selection is not the origin of long necks in giraffes". Journal of Zoology. 278 (4): 281–286. doi:10.1111/j.1469-7998.2009.00573.x.
Newly named mammals :
| Name | Status | Authors | Age | Unit | Location | Notes | Images |
| Anoiapithecus | Valid | Moyà-Solà Alba et al. | Middle Miocene | | Spain | | |
| Apatemys pygmaeus | Valid | Beard & Dawson | Early Wasatchian | | United States | A member of the family Apatemyidae. | |
| Arcantiodelphys | Valid | Vullo Gheerbrant et al. | Cenomanian | | France | | |
| Arvicanthis broekhuisi | Valid | Hordijk De Bruijn | Latest Miocene or earliest Pliocene | Komnina Formation | Greece | A rodent belonging to the family Muridae, a species of Arvicanthis. | |
| Bonisicyon | Valid | Werdelin & Simpson | Late Miocene | | Ethiopia  Kenya | A bear dog. The type species is Bonisicyon illacabo. | |
| Choctawius | Valid | Beard & Dawson | Early Wasatchian | | United States | A member of Primatomorpha belonging to the family Microsyopidae. The type species is C. foxi; genus also includes "Navajovius" mckennai Szalay (1969). | |
| Colpocherus | Valid | Beard & Dawson | Early Wasatchian | | United States | A member of the family Amphilemuridae. The type species is C. mississippiensis. | |
| Corbarimys? nomadus | Valid | Beard & Dawson | Early Wasatchian | | United States | A rodent related to members of the genus Paramys. | |
| Corriebaatar | Valid | Rich Vickers-Rich et al. | Aptian | Wonthaggi Formation | Australia | First Australian multituberculate. | |
| Darwinius | Valid | Franzen Gingerich et al. | early Geiseltalian | Messel Formation | Germany | | Darwinius |
| Diaceratherium massiliae | Disputed | Ménouret & Guérin | Late Oligocene | | France | A rhinoceros. Originally described as a species of Diaceratherium; Tissier, Antoine & Becker (2021) interpreted it as a junior synonym of Ronzotherium romani. | |
| Diacocherus dockeryi | Valid | Beard & Dawson | Early Wasatchian | | United States | A member of Erinaceomorpha belonging to the group Litocherinae. | |
| Disallomys | Valid | Korth | Late Oligocene | | United States | An aplodontiid rodent, a new genus for the species "Allomys" storeri Tedrow and Korth. Genus also contains two new species: Disallomys robustus and D. intermedius. | |
| Douglassciurus sapphirus | Valid | Korth | Late Oligocene | | United States | A sciurine squirrel, a species of Douglassciurus. | |
| Duerotherium | Valid | Cuesta Badiola | Middle Eocene | | | An anoplotheriine artiodactyl | |
| Ectocion nanabeensis | Valid | Beard & Dawson | Early Wasatchian | | United States | | |
| Eogale | Valid | Beard & Dawson | Early Wasatchian | | United States | A member of the family Miacidae. The type species is E. parydros. | |
| Eritherium | Valid | Gheerbrant | Early Thanetian | Ouled Abdoun basin | Morocco | The oldest, smallest and most primitive elephant relative. | |
| Franimys? actites | Valid | Beard & Dawson | Early Wasatchian | | United States | A rodent related to members of the genus Paramys. | |
| Ganlea | Valid | Beard Marivaux et al. | late Middle Eocene | Pondaung Formation | Myanmar | | |
| Haplomylus meridionalis | Valid | Beard & Dawson | Early Wasatchian | | United States | A member of the family Hyopsodontidae. | |
| Heliscomys walshi | Valid | Kelly | Middle Eocene | Sespe Formation | United States | A heliscomyid rodent, a species of Heliscomys. | |
| Howellictis | Valid | De Bonis et al. | Late Miocene | | Chad | A member of Mustelidae belonging to the subfamily Mellivorinae. The type species is H. valentini. | |
| Kahawamys | Valid | Stevens Holroyd et al. | Late Oligocene | Nsungwe Formation | Tanzania | A thryonomyoid rodent | |
| Legionarictis | Valid | Tseng Wang Stewart | Miocene (Barstovian) | Temblor Formation | United States | A mustelid. The type species is Legionarictis fortidens. | |
| Maiacetus | Valid | Gingerich ul-Haq et al. | early Middle Eocene | Habib Rahi Formation | Pakistan | | Maiacetus |
| Maddenia | Valid | Kramarz Bond | Late Oligocene | Sarmiento Formation | Argentina | An astrapothere astrapotherid. | |
| Meiconodon | Valid | Kusuhashi Hu et al. | Aptian/Albian | Fuxin Formation Shahai Formation | China | A alticonodontine triconodontid | |
| Miacis igniculus | Valid | Beard & Dawson | Early Wasatchian | | United States | | |
| Microtodon komanensis | Valid | Hordijk De Bruijn | Early Pliocene | Ptolemais Formation | Greece | A rodent. | |
| Mimoperadectes houdei | Valid | Horovitz et al. | Early Wasatchian | Willwood Formation | United States | | |
| Mimoperadectes sowasheensis | Valid | Beard & Dawson | Early Wasatchian | | United States | | |
| Miosengi | Valid | Grossman Holroyd | Early Miocene | Lothidok Formation | Kenya | An elephant shrew. The type species is M. butleri. | |
| Mustela nivalis kudarensis | Valid | Baryshnikov | Middle to late Pleistocene | | South Ossetia | A fossil subspecies of the least weasel. | |
| Myomimus igdeliensis | Valid | Suata-Alpaslan | Early Pliocene (Ruscinian) | | Turkey | A dormouse, a species of Myomimus. | |
| Mytonolagus ashcrafti | Valid | Fostowicz-Frelik & Tabrum | Eocene | | United States | A member of the family Leporidae. | |
| Nalameryx | Valid | Métais Welcomme Ducrocq | Middle Oligocene | Chitarwata Formation | Pakistan | A lophiomerycid ruminant | |
| Naranius americanus | Valid | Beard & Dawson | Early Wasatchian | | United States | A member of the family Cimolestidae. | |
| Niglarodon brachyodon | Valid | Korth | Late Oligocene | | United States | An aplodontiid rodent, a species of Niglarodon. | |
| Notiolofos | Valid | Bond et al. | Eocene | La Meseta Formation | Antarctica (Seymour Island) | A member of Litopterna belonging to the family Sparnotheriodontidae; a replacement name for Notolophus Bond et al. (2006). | |
| Occitanomys (Rhodomys) vandami | Valid | Suata-Alpaslan | Early Pliocene (Ruscinian) | | Turkey | A member of the family Muridae. | |
| Ochotona mediterranensis | Valid | Suata-Alpaslan | Early Pliocene (Ruscinian) | | Turkey | A pika. | |
| Oligospermophilus emryi | Valid | Korth | Late Oligocene | | United States | A cedromurine squirrel, a species of Oligospermophilus emryi. | |
| Palaeosinopa aestuarium | Valid | Beard & Dawson | Early Wasatchian | | United States | | |
| Paramys dispar | Valid | Beard & Dawson | Early Wasatchian | | United States | | |
| Praesinomegaceros venustus | Valid | Vislobokova | Late Miocene (late Turolian) | | Russia | A megacerine deer, a species of Praesinomegaceros. | |
| Proconsul meswae | Valid | Harrison Andrews | Early Miocene | | Kenya | A species of Proconsul or Ugandapithecus. | |
| Prosciurus clausulus | Valid | Korth | Late Oligocene | | United States | An aplodontiid rodent, a species of Prosciurus. | |
| Proterix minimus | Valid | Korth | Late Oligocene | | United States | An erinaceid, a species of Proterix. | |
| Pseudomeriones hansi | Valid | Suata-Alpaslan | Early Pliocene (Ruscinian) | | Turkey | A gerbil. | |
| Puijila | Valid | Rybczynski Dawson Tedford | Early Miocene | | Canada | Extinct genus of pinniped. | Puijila |
| Sallamys quispea | Valid | Shockey et al. | Deseadan | Moquegua Formation Salla Beds | Bolivia  Peru | A caviomorph rodent related to the group Octodontoidea. Originally described as a species of Sallamys; subsequently transferred to the genus Migraveramus by Pérez et al. (in press). | |
| Simplomys | Valid | García-Paredes in García-Paredes, Peláez-Campomanes & Álvarez-Sierra | Miocene | | France  Germany  Portugal  Spain  Switzerland | A dormouse. The type species is "Pseudodryomys" simplicidens De Bruijn (1966); genus also includes "Pseudodryomys" robustus De Bruijn (1967), "Pseudodryomys" aljaphi Hugueney et al. (1978) and "Pseudodryomys" julii Daams (1989), as well as new species S. meulenorum. | |
| Viverriscus | Valid | Beard & Dawson | Early Wasatchian | | United States | A member of the family Viverravidae. The type species is V. omnivorus. | |
| Wyonycteris primitivus | Valid | Beard & Dawson | Early Wasatchian | | United States | A member of Soricomorpha belonging to the family Nyctitheriidae. | |