1,720,981 research outputs found
Biocronologia del Plio-Pleistocene sardo: il contributo degli ochotonidi (Lagomorpha, Mammalia)
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Microtus (Tyrrhenicola) sondaari n. sp. (Arvicolidae, Rodentia) from Monte Tuttavista (Sardinia, Italy)
No full textMicrotus (Tyrrhenicola) henseli is an endemic fossil vole widespread in Sardinia and Corsica during Middle Pleistocene to Holocene. Some analyses on new populations of M. (Tyrrhenicola) from the recently studied fissure fillings of Monte Tuttavista (Orosei, Western Sardinia) have been carried out, leading to the description of a new species of M. (Tyrrhenicola) more archaic than Microtus (Tyrrhenicola) henseli
The endemic vole Tyrrhenicola (Arvicolidae, Rodentia) from Monte Tuttavista (Sardinia, Italy): new perspectives for phylogeny and biochronology
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Chasmaporthetes melei n. sp. an endemic hyaenid (Carnivora, Mammalia) from the Monte Tuttavista fissure fillings (Late Pliocene to early Pleistocene; Sardinia, Italy
No full textOccurrence of large carnivores in island ecosystems is unusual, especially in the case of top predators. Here, a new endemic hyaenid species, Chasmaporthetes melei, from the late Late Pliocene to earliest Pleistocene fissure fillings of Monte Tuttavista, Orosei, Sardinia, is described. Although smaller, C. melei is morphologically comparable with the Plio-Pleistocene Eurasian hunting-hyena Chasmaporthetes lunensis, a possible ancestor of the Sardinian species. C. melei displays all the characteristic feeding adaptations of Chasmaporthetes, including a derived enamel structure similar to the condition in extant bone-crushing hyaenas. C. melei was an active predator that nonetheless included a relatively large amount of bone in its diet
Enlarged tooth area in the Sardinian Prolagus lineage (Lagomorpha, Early Pleistocene-Holocene): is it a response to ecological stressors of islands?
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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