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Les Rongeurs du Pliocène final de Ahl al Oughlam, connus par plusieurs milliers de dents, ne comprennentpourtant que 6 espèces. Hystrix et le Cténodactylidé Irhoudia sont très rares; les Muridés Paraethomys, Praomys et Mus sont un peu plus primitifs qu'à Irhoud Ocre. Une espèce nouvelle de Gerbillus ressemble beaucoup à G. campestris, malgré son âge ancien. Les Insectivores sont presque tous des Soricidés;...
Dès la base du Miocène, le Castoridé européen Steneofiber avait mis en place une stratégie de reproductiontrès proche de celle du Castor actuel avec élevage des jeunes pendant deux années. A la même époque, en Amérique du Nord, se développèrent des castors fouisseurs qui élevaient leurs jeunes au fond de terriers hélicoïdaux (Daimonelix). Les castors fouisseurs ont disparu dès la fin du Miocène inférieur;...
This paper presents a revision of the taxonomy of the genera ApodemusKaup, 1826, ParapodemusSchaub, 1938, RhagamysForsyth Major, 1905 and RhagapodemusKretzoi, 1956. A new classification is proposed, that makes Mus gaudryiDames, 1883 from the Late Miocene the only species of the monospecific genus Parapodemus. Other species formerly included in this genus are transferred to the genus Apodemus. Rhagapodemus...
Le nouveau gisement de Lissasfa près de Casablanca (Maroc) a livré une abondante faune de roungeurs qui comprend: une nouvelle espèce de Paraethomys voisine des formes espagnoles; un Mus qui pourrait être le plus ancien d'Afrique du Nord; une nouvelle espèce de Ruscinomys, à troisièmes molaires très peu réduites; un Myocricetodon semblable à des formes du Miocène terminal d'Espagne; une nouvelle espèce...
La biostratigraphie et la chronostratigraphie de la séquence de gisements de mammifères de Crevillentesont analysées, donnant comme résultat une zonation détaillée à base de rongeurs. Les gisements sont attribués au Turolien, ou, en terminologie de stratigraphie marine, au Tortonien et Messinien. La corrélation de la limite Tortonien/Messinien avec la séquence de gisements à faunes de rongeurs peut...
The micromammal fauna of the reddish continental sediments of the Zorreras Member in the Sorbas Basin of SE Spain contains elements that are characteristic for the latest Miocene, close to the Mio-Pliocene limit. The paleomagnetic analysis shows that the entire sequence has reversed polarity. The combination of these data suggests that the Zorreras section must be correlated to chron C3r.
Hypsosteiromys is the only New World porcupine that shows a tendency to hypsodonty. It is recorded exclusively from the Colhuehuapian Age (Early Miocene) of central Patagonia (Argentina). In addition to the type species, a second one, Hypsosteiromys nectus (AMEGHINO, 1902), is recognized, from the southern cliff of Colhuehuapi Lake (Chubut province). It differs from the type species in the lesser...
Several new fossiliferous Pliocene localities have been identified in the continental deposits of the area of Tollo de Chiclana (Guadix Basin, SE Spain), that have yielded a rich rodent and insectivore fauna. In this paper, we study the Arvicolidae from these localities. Remains adscribed to the genera Dolomys, Mimomys and Kislangia have been found, which are very interesting from a biostratigraphical...
Field work carried out in 1991 and 1993 at the Middle Miocene locality of Thymiana (Chios Island, Greece), produced much rodent material including a number of ctenodactylid dental specimens. They represent a single taxon whose upper and lower cheek tooth morphology clearly differs from Prosayimys flynni and all Sayimys species known so far, except for Sayimys intermedius. The ctenodactylid teeth from...
A study of the taphonomy and age profiles of the mole rat population from Langebaanweg ‘E’ Quarry was undertaken in order to see if these subterranean rodents had been accumulated by predation (coprocoenosis hypothesis) or as a result of drowning in their burrows during a flood event (catastrophocenosis hypothesis). Previous research has cited the bathyergids as being the most common rodent at Langebaanweg,...
In the lignite sediments of Pietrafitta (Tiberino Basin, Umbria, Central Italy), a rich fossil assemblage of vertebrate, invertebrate and plant remains belonging to the Farneta Faunal Unit (Late Villafranchian, Early Pleistocene) was collected. Among them fossil beaver cranial remains are relatively abundant. Western-Central Europe Villafranchian beaver remains were assigned to C. plicidens by some...
The material of Hispanomys bijugatus (Rodentia, Cricetodontinae) from La Grive-Saint Alban (carrière Lechartier, fissure L3) is described for the first time and compared with all species of the genus known to date. As common in the Upper Aragonian populations of Hispanomys, this taxon evidences a low variability. H. bijugatus shows some progressive characters with respect to the remaining Aragonian...
Since the proposition in 1975 of the European Neogene Mammal (MN) scale by Pierre Mein, the amount of taxonomical, stratigraphical and chronological information around Europe has increased exponentially. In this paper, the stratigraphical schemes of three of the best studied areas for the Lower and Middle Miocene, the Aragonian type area in Spain and the Upper Freshwater Molasse from the North Alpine...
Octodontoidea is the most diverse group of caviomorph rodents. The systematics of most of the fossil representatives has been essentially based upon dental characters. Described here is an almost complete skull with dentition assigned to Prospaniomys Ameghino based upon its dental morphology. The specimen comes from the Sarmiento Formation at Pampa de Gan Gan (central Patagonia, Argentina), assigned...
Among the 14small mammal species from the early Miocene locality of the northern area of the Junggar basin (northern Xinjiang, China), four species are cricetids (Rodentia): unnamed species of Cricetodon and Eumyarion, and two new species, Karydomys debruijni nov. sp. and Megacricetodon beijiangensis nov. sp. Some aspects of the morphology of Cricetodon sp. are shared by Eucricetodon from the late...
The biochronological age of the small-mammal populations of Los Gargantones 1, 2 and La Celia (upper Miocene, La Celia sub-basin, Murcia, Spain) is re-interpreted. The presence in Los Gargantones of Occitanomys adroveri, Parapodemus barbarae, Parapodemus cf. gaudryi, Huerzelerimys turoliensis, Atlantoxerus cf. adroveri, and Alilepus evidences a correlation to MN12 (∼7.5–7Ma) rather than to MN11 (∼9–7...
Mammal remains have been collected during surveys between December, 2011 and April, 2013, in a cave in the Chaiyaphum Province, Northeastern Thailand, by a team from Mahasarakham University and the Natural History Museum of the National Science Museum of Thailand. The Tham Prakai Phet (the cave of glittering diamonds) is a long karstic cavity formed in a Permian dolomitic limestone and already known...
Terre Rosse deposits (upper Miocene; Gargano, Italy) have provided fossil remains of an insular fauna among which the genus Mikrotia (Rodentia) stands out. Several paleobiological studies have already been conducted on this genus, but its body mass has not yet been calculated accurately. The aim of the present work is to reconstruct Mikrotia magna's weight, a paramount aspect of organismal biology,...
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