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    Wyświetlanie 1-5 z 5
    Tytuł:
    New early Eocene tapiromorph perissodactyls from the Ghazij Formation of Pakistan, with implications for mammalian biochronology in Asia
    Autorzy:
    Missiaen, P.
    Gingerich, P.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/22715.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Early Eocene
    Eocene
    tapiromorph perissodactyl
    Ghazij Formation
    Pakistan
    biochronology
    Asia
    Mammalia
    Perissodactyla
    Isectolophidae
    Lophialetidae
    Eomoropidae
    Opis:
    Early Eocene mammals from Indo−Pakistan have only recently come under study. Here we describe the first tapiromorph perissodactyls from the subcontinent. Gandheralophus minor gen. et sp. nov. and G. robustus sp. nov. are two species of Isectolophidae differing in size and in reduction of the anterior dentition. Gandheralophus is probably derived from a primitive isectolophid such as Orientolophus hengdongensis from the earliest Eocene of China, and may be part of a South Asian lineage that also contains Karagalax from the middle Eocene of Pakistan. Two specimens are referred to a new, unnamed species of Lophialetidae. Finally, a highly diagnostic M3 and a molar fragment are described as the new eomoropid chalicothere Litolophus ghazijensissp. nov. The perissodactyls described here, in contrast to most other mammalian groups published from the early Eocene of Indo−Pakistan, are most closely related to forms known from East and Central Asia, where Eocene tapiromorphs are diverse and biochronologically important. Our results therefore allow the first biochronological correlation between early Eocene mammal faunas in Indo−Pakistan and the rest of Asia. We suggest that the upper Ghazij Formation of Pakistan is best correlated with the middle or late part of the Bumbanian Asian Land Mammal Age, while the Kuldana and Subathu Formations of Pakistan and India are best correlated with the Arshantan Asian Land Mammal Age.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Middle Miocene rodents from Pasalar, Anatolia, Turkey
    Autorzy:
    Pelaez-Campomanes, P
    Daams, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/20448.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Miocene
    mammal
    Turkey
    Rodentia
    Spermophilinus
    Anatolia
    rodent
    Megacricetodon
    Middle Miocene
    biochronology
    Democricetodon
    Peridyromys
    paleontology
    Opis:
    Despite the importance of the Paşalar fauna for the evolution and biogeography of Miocene mammals, few studies on its rodents have been published. In this paper a taxonomic analysis of the Paşalar rodents and the possible correlation that can be based on them are presented. Several rodent taxa, previously unknown from Paşalar are described. These include the cricetids Megacricetodon andrewsi sp. nov. and Democricetodon brevis (Schaub, 1925), the sciurids Spermophilinus bredai (Meyer, 1848) and Sciurinae indet., and the glirid Peridyromys lavocati sp. nov. The taxa previously described from Paşalar are: the ctenodactylid Sayimys cf. intermedius (Sen and Thomas, 1979), the cricetid Cricetodon pasalarensis (Tobien, 1978), the spalacid Pliospalax marmarensis Ünay, 1990 and the castorid cf. Chalicomys jaegeri Kaup, 1832. These determinations represent a reduction of the number of taxa recorded from the locality, as previous papers listed up to five sciurids. Only two sciurids and two glirids are recognized in this study. Mainly on the basis of the new cricetid records, it is possible to correlate the Paşalar fauna to late MN6.
    Źródło:
    Acta Palaeontologica Polonica; 2002, 47, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Suidae and Sanitheriidae from Wadi Moghra, Early Miocene, Egypt
    Autorzy:
    Pickford, M.
    Miller, E.R.
    El-Barkooky, A.N.
    Powiązania:
    https://bibliotekanauki.pl/articles/20171.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Suidae
    Sanitheriidae
    Wadi Moghra
    Early Miocene
    Miocene
    Egypt
    paleontology
    Mammalia
    biochronology
    Africa
    paleoenvironment condition
    Opis:
    New suid and sanithere material from Wadi Moghra, early Miocene, Egypt, is described and discussed. The new material greatly improves the sample size and diversity of suoids known from North Africa, and includes one species of Sanitheriidae and three species of Kubanochoerinae. The Moghra suoid assemblage most closely resembles that from Gebel Zelten, Libya, suggesting that at least part of the Moghra deposits may overlap in time with part of Zelten, i.e., is equivalent in age to MN 4–5 of the European mammal zonation, or PIII of the East African one. Information from suids and sanitheres is consistent with previous interpretations, that the Moghra deposits were formed under swampy and littoral paleoenvironmental conditions.
    Źródło:
    Acta Palaeontologica Polonica; 2010, 55, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new early Pliocene murine rodent from the Iberian Peninsula and its biostratigraphic implications
    Autorzy:
    Pinero, P.
    Verzi, D.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082273.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Mammalia
    Murinae
    biochronology
    diversification pattern
    early Ruscinian
    Europe
    Opis:
    In the last years, a murine identified as Paraethomys aff. abaigari has been repeatedly recognized in several early Pliocene localities of the Iberian Peninsula. We have revised these occurrences, as well as other samples of similar morphology, and propose that all these records correspond to a new species. We diagnose Paraethomys baeticus sp. nov. based on a large sample from the early Ruscinian site of Baza-1 (Guadix-Baza Basin, Spain). It is a medium-sized representative of the genus, with relatively well-developed longitudinal connections both in upper and lower molars, but incomplete stephanodonty. M1 displays high tubercles t6–t9 and low t4–t8 connections. M1 and, to a lesser extent, M2 have posterior spurs on t1 and t3. The t9 and t12 are absent in M2. In m1, a round islet of enamel between the anteroconid and the protoconid-metaconid is regularly observed, as well as a general lack of medial anteroconid, moderate labial cingulum with large posterior accessory cuspid, and longitudinal spur. The new species differs from other European representatives of the genus Paraethomys mainly in its size, which is intermediate between that of the small-sized Paraethomys meini and the large-sized Paraethomys abaigari. In addition, both the size and relative width are smaller than those of Paraethomys jaegeri. The frequency of posterior spurs on t1 and t3 of M1 and M2 is higher than that of P. meini and lower than that of P. jaegeri. The new species here described represents a key biochronological and biostratigraphic marker, since it is restricted to levels of late early Ruscinian age. Thus, this species is useful for establishing divisions within the early Ruscinian, and becomes a characteristic taxon for the early Pliocene in the terrestrial record of the Iberian Peninsula. Magnetobiostratigraphic correlations suggest a chronological range for P. baeticus sp. nov. between ca. 4.6 and 4.3 Ma.
    Źródło:
    Acta Palaeontologica Polonica; 2020, 65, 4; 719-731
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Miocene capybaras from Argentina: Skull anatomy, taxonomy, evolution, and biochronology
    Autorzy:
    Vucetich, M.G.
    Deschamps, C.M.
    Vieytes, E.C.
    Montalvo, C.I.
    Powiązania:
    https://bibliotekanauki.pl/articles/945889.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    Miocene
    Late Miocene
    capybara
    mammalia
    Rodentia
    Cavioidea
    Hydrochoerinae
    Argentina
    skull
    anatomy
    taxonomy
    evolution
    biochronology
    morphometry
    biostratigraphy
    Opis:
    Fossil capybaras are morphologically extremely varied, but previous studies have disagreed on whether this diversity reflects intraspecific variation or the existence of multiple species. Here, we review the capybaras from the classic Argentinian Late Miocene localities of Paraná River cliffs (“conglomerado osífero” of the Ituzaingó Formation, Entre Ríos), and Chillhué and Guatraché shallow lakes (Cerro Azul Formation, La Pampa), and perform a morphometric analysis of their upper cheek teeth and the posterior portion of the rostrum. Our results confirm that all of the specimens from the “conglomerado osífero” belong to the single species Cardiatherium paranense. In addition, we refer a specimen from Tupungato (Río de los Pozos Formation, Mendoza) to C. paranense, thus expanding its geographical range. The material from La Pampa represents a different taxon, and is here preliminary referred to Cardiatherium aff. orientalis. Our systematic interpretation of Late Miocene capybaras suggests that the early radiation of this group was not as explosive as previously thought, and was likely constrained by the early acquisition of large size, increasing complexity of the cheek teeth, and probably semi-aquatic habits.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 3; 517-535
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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