Papers by Francisco Javier Ruiz-Sánchez
Historical Biology
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HAL (Le Centre pour la Communication Scientifique Directe), 2017
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Journal of Iberian Geology, Oct 22, 2018
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Acta Palaeontologica Polonica, 2014
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Isurus, 2014
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Rivista Italiana Di Paleontologia E Stratigrafia, Aug 20, 2021
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Geobios, Jul 1, 2012
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HAL (Le Centre pour la Communication Scientifique Directe), Jun 26, 2018
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HAL (Le Centre pour la Communication Scientifique Directe), Jul 31, 2017
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Palaeogeography, Palaeoclimatology, Palaeoecology
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Isurus, 2008
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Isurus, 2014
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Isurus, 2015
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Historical Biology, 2022
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Two species of the family Eomyidae are identified in the Early Miocene localities of the Araia d&... more Two species of the family Eomyidae are identified in the Early Miocene localities of the Araia d'Alcora outcrop (Ribesalbes-Alcora Basin, Iberian Peninsula): Ligerimys florancei and Ligerimys ellipticus. The first is rarer than the second, which is one of the most abundant mammals in the Ribesalbes-Alcora Basin assemblages. Due to its abundance, we are able to describe its variability in dental morphology, showing characteristics never previously observed, including the presence of a mesoloph or other features previously described only in ancient assemblages of this species, such as the presence of the anteroloph, which appears in younger assemblages in the Araia sequence. Furthermore, based on the eomyids, we divide the record of the Campisano Ravine section into two long local biozones, depending on the species present. In addition, each local biozone is divided into two smaller sub-biozones, depending on the abundance of each species. We retrospectively compare and correlate ...
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Spanish Journal of Palaeontology, 2021
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Journal of Human Evolution, 2022
Dmanisi (Georgia) is one of the oldest Early Paleolithic sites discovered out of Africa. In addit... more Dmanisi (Georgia) is one of the oldest Early Paleolithic sites discovered out of Africa. In addition, it is the best site to understand the first Homo deme out of Africa and the first hominin occupation of Central to Western Eurasia. It has produced more than 40 hominin remains, including several very informative skulls, found in direct association with faunal remains and numerous lithic artifacts. To date, fossil amphibians and reptiles are one of the few proxies that have been used to propose quantitative climate reconstructions for the time where the hominins were living at Dmanisi. The aim of the present study is to review and amplify the previous paleoclimatic interpretation given by Blain et al. (2014), with an enhanced methodology using geographic information system and based on uncertain distribution area-occupied distribution area discrimination technique. This procedure permits to approach to a more precise common species distribution area and then using the WorldClim v. 2.1 climate database to propose for the first time monthly reconstructions for temperature and rainfall, in addition to annual parameters. The same technique is used to infer dominant ecoregions through the study area and potential tree coverage. Dmanisi climate is newly reconstructed as warm and semi-arid, similar to the present-day Mediterranean climate. New estimates however suggest warmer temperatures than previously reconstructed, together with a slightly higher but much more irregular amount of rainfall. The aridity indexes suggest a six months dry period, from May to October. Associated regional paleoenvironment is mainly characterized by Mediterranean forests, woodlands, and scrub, and the potential tree coverage is around 25%, that is, much less forested than today. New estimates agree with the 'Iberian' hominin ecological model, and with other proxies (large mammals, small mammals and archaeobotanical remains) that indicate a period of increased aridity contemporaneous with human occupations of the site.
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Spanish Journal of Palaeontology, 2021
En el presente trabajo se describe la asociación de Megacricetodon crusafonti (Freudenthal, 1963)... more En el presente trabajo se describe la asociación de Megacricetodon crusafonti (Freudenthal, 1963), Megacricetodon sp. y Heteroxerus aff. grivensis (Forsyth Major, 1893) de Cazuma 1, localidad situada en el sector de Bicorp, en la cuenca terciaria de Quesa - Bicorp (Prov. Valencia). La edad atribuida a esta localidad es Aragoniense Superior. Hasta el momento, con ésta, ya son cinco las localidades conocidas de mamíferos en el Aragoniense de la cuenca de Quesa - Bicorp (Cazuma 1, Quesa 0, Quesa 2, Quesa 3 y Quesa 6).
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Bulletin of Geosciences, 2021
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Earth and Environmental Science Transactions of the Royal Society of Edinburgh, 2020
ABSTRACTWe present the bat assemblage from the early Miocene (MN4, 16.9–15.95 MY) basin of Ribesa... more ABSTRACTWe present the bat assemblage from the early Miocene (MN4, 16.9–15.95 MY) basin of Ribesalbes-Alcora, which has yielded the remains of ten chiropteran taxa. Bat assemblages are rarely recovered in the fluvio-lacustrine fossil record. A bat species described in this work,Cuvierimops penalverisp. nov., is a new form of a typically Oligocene free-tailed bat. In addition, the other molossidsHydromops helveticus,Rhizomops cf.brasiliensis,Chaerephonsp.,Tadaridasp., and the vespertilionidsMyotis cf.intermediusandMiostrellusaff.petersbuchensis, as well as undetermined fossils ascribed to the generaSubmyotodon,Plecotus, andRhinolophusare described. This is the first record of the genusRhizomopsin the early Miocene; the genusCuvierimopsis the first recording from the Neogene, while the ‘Lazarus taxon’Chaerephonis the first fossil record of this genus, registered previously only in Holocene deposits. This bat assemblage with a high abundance of molossids is typical from the early Oligo...
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Papers by Francisco Javier Ruiz-Sánchez
Alcoi Cristian (AC-0, AC-0B and AC-0C). We infer in this paper an Early Ruscinian age for these sites. Based on the
analysis of the fossil micromammal faunas, we consider that the localities ABS-3 and ABS-3A are older than AC-0,
which has a similar age as the classic site of Alcoy-Barranco. The palaeoecological interpretation of the fauna recovered
from these new sections show dry conditions in the Early Pliocene (MN14) from the Alcoy Basin.
Cabriel, Alcoy and Granada basins of southeastern Spain. Eliomys yevesi sp. nov. is characterized by its relative small
size, narrow lingual wall and common presence of two centrolophs in the upper molars, and well-developed centrolophids in the lower molars. The new species is the probable ancestor of E. intermedius, which in turn represents the
ancestor of the extant E. quercinus. According to its morphologic and biometric features, the origin of E. yevesi sp. nov.
is likely to be found in some population of E. truci from the Late Miocene. Based on these affinities, we propose the
lineage E. truci–E. yevesi sp. nov.–E. intermedius–E. quercinus, in which there is a trend towards the development of
centrolophs, as well as the reduction of accessory crests.
plinii–A. alberti–A. barrierei–A. angustidens (MN16). Along this lineage, gradual morphological and
biometrical changes occur, but not all the species are represented by rich populations. The assemblage of
Apocricetus alberti from Venta del Moro is by far the most abundant collection of this species. This
population shows a great morphological variability in some characters like the morphology of the
anteroconid and the anterolophulids in m1 and the shape of the anterolophule in M1, with morphotypes
that resemble both older and younger populations of Apocricetus. Along the phyletic lineage of
Apocricetus, a change in the shape of m3 occurs, from predominantly subtriangular forms in the oldest
populations to predominantly subrectangular in the youngest. To quantify this feature we use the
posterior width of the molar and the anterior width/posterior width ratio, proposing five morphological
categories, from extremely triangular to subrectangular.