Topic
Rhagamys
About: Rhagamys is a research topic. Over the lifetime, 5 publications have been published within this topic receiving 106 citations.
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TL;DR: A new classification is proposed, that makes Mus gaudryi Dames, 1883 from the Late Miocene the only species of the monospecific genus Parapodemus, and other species formerly included in this genus are transferred to the genus ApodemUS.
81 citations
01 Jan 2010
TL;DR: A multidisciplinary approach (palaeontological, sedimentological and stable isotope analyses) was performed to analyse the fossiliferous sequence exposed in the "Grotta dei Fiori" cave (South Western Sardinia, Italy), where several small mammal remains (Microtus (Tyrrhenicola) henseli, Rhagamys orthodon, "Nesiotites" similis and Prolagus sardus) were discovered together with scanty remains of the endemic canid Cynotherium, and birds as mentioned in this paper.
Abstract: A multidisciplinary methodological approach (palaeontological, sedimentological and stable isotope analyses) was performed to analyse the fossiliferous sequence exposed in the "Grotta dei Fiori" cave (South Western Sardinia, Italy), where several small mammal remains (Microtus (Tyrrhenicola) henseli, Rhagamys orthodon, "Nesiotites" similis and Prolagus sardus) were discovered together with scanty remains of the endemic canid Cynotherium, and birds. Morphology and morphometry of first lower molars (M 1 ) of Microtus (Tyrrhenicola) henseli from Grotta dei Fiori show that primitive and advanced morphotypes are present in each fossiliferous level. The relative frequency of morphotypes indicates that the population from "Grotta dei Fiori" might be regarded as more advanced than Microtus (Tyrrhenicola) sondaari from Xg3 fissure of Monte Tuttavista (Eastern Sardinia, late Early Pleistocene) and more primitive than the most of ?Middle and Late Pleistocene populations of Microtus (Tyrrhenicola) henseli from Sardinia. All in all, the data thus far provided by sedimentology and geochemistry indicate that the fossiliferous sequence of "Grotta dei Fiori" was deposited under climatic conditions characterized by an alternation of wet and dry periods. Taking into account the evolutionary degree of voles, 13 C/ 12 C and
13 citations
TL;DR: A mammal assemblage discovered in a fissure filling located in a quarry near the village of Samatzai (Campidano, southern Sardinia, Italy) is described in this paper.
Abstract: A mammal assemblage discovered in a fissure filling located in a quarry near the village of Samatzai (Campidano, southern Sardinia, Italy) is described herein. The following taxa are reported: Microtus ( Tyrrhenicola ) henseli , Rhagamys orthodon , Prolagus sardus , Asoriculus sp., Cynotherium sardous and Praemegaceros ( Nesoleipoceros ) cazioti . The assemblage (“ Microtus ( Tyrrhenicola )” Faunal Complex, Dragonara Faunal Subcomplex) infers a Late Pleistocene age and represents the richest deposit of Quaternary mammals reported in the central Campidano area.
12 citations
DOI•
15 Dec 2019TL;DR: In this article, a mammal assemblage collected from a deposit within Sa Cona Cave (Teulada, southwestern Sardinia, Italy) is described, primarily represented by small mammal remains and a few, badly preserved remains of large mammals.
Abstract: Quaternary fossil vertebrates are reported from numerous deposits of Sardinia and can be a suitable tool to correlate localities in different depositional contexts (e.g. fissure fillings, caves, aeolian deposits). Here, a mammal assemblage collected from a deposit within Sa Cona Cave (Teulada, south-western Sardinia, Italy) is described. The sample is primarily represented by small mammal remains and a few, badly preserved remains of large mammals. The following taxa have been identified: Cynotherium sardous , Praemegaceros cazioti , Prolagus sardus , Microtus ( Tyrrhenicola ) henseli , Rhagamys orthodon , and “ Asoriculus ” similis . Similar faunal assemblages, known from some localities of Sardinia and Corsica, have been generally regarded as Late Pleistocene in age (Dragonara Faunal Sub-Complex). The sequence of Sa Cona Cave represents to date one of the most rich Quaternary mammal deposits known from the extreme south-western Sardinia.
7 citations
TL;DR: The results clearly show that Rhagapodemus - Rhagamys lineage undergoes stasis during the middle and late Pleistocene of Sardinia, while size shows a random walk pattern between populations, characterized by an increase in size at the Rhag APdemus minor- RhagAmys orthodon transition.
Abstract: Stasis, random walk and directional evolutionary patterns have been tested on the lower and upper first molars of the Rhagapodemus - Rhagamys lineage (Rodentia, Muridae) from Middle and Late Pleistocene fissure fillings of Monte Tuttavista, Orosei, Sardinia, Italy. We recorded the maximum length/maximum width ratio and size on 252 lower first molars and 208 upper first molars belonging to different fossil samples of Rhagapodemus minor and Rhagamys orthodon in order to explore evolutionary dynamics underlying molar morphology evolution. Akaike Information Criterion (AICc) was used for selection of the best model of evolution, in order to distinguish different evolutionary patterns. Our results clearly show that Rhagapodemus - Rhagamys lineage undergoes stasis during the middle and late Pleistocene of Sardinia, while size shows a random walk pattern between populations, characterized by an increase in size at the Rhagapodemus minor- Rhagamys orthodon transition.
7 citations