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The Late Miocene Mammal Faunas of the Mytilinii Basin, Samos Island, Greece: New Collection - 17

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The Late Miocene Mammal Faunas of the Mytilinii Basin, Samos Island, Greece: New Collection - 17 ZOBODAT - www.zobodat.at Zoologisch-Botanische Datenbank/Zoological-Botanical Database Digitale Literatur/Digital Literature Zeitschrift/Journal: Beiträge zur Paläontologie Jahr/Year: 2009 Band/Volume: 31 Autor(en)/Author(s): Koufos George D., Kostopoulos Dimitris S., Merceron Gildas Artikel/Article: The Late Miocene Mammal Faunas of the Mytilinii Basin, Samos Island, Greece: New Collection - 17. Palaeoecology - Palaeobiogeography 409-430 ©Verein zur Förderung der Paläontologie am Institut für Paläontologie, Geozentrum Wien Beitr. Paläont., 31:409—430, Wien 2009 The Late Miocene Mammal Faunas of the Mytilinii Basin, Samos Island, Greece: New Collection 17. Palaeoecology - Palaeobiogeography by George D. Koufos1), Dimitris S. Kostopoulos1) & Gildas Merceron2) Koufos, G.D., Kostopoulos, D.S. 8 c M erceron, G., 2009. The Late Miocene Mammal Faunas of the Mytilinii Basin, Samos Island, Greece: New Collection. 17. Palaeoecology - Palaeobiogeography. — Beitr. Palaont., 31:409-430, Wien. Abstract „kleinsten Anzahl an Individuen“ (Minimum Number of Individuals = MNI), der Taxonomie und der Nahrungs­ The palaeoecology of the Samos mammal faunas is studied präferenzen der verschiedenen Säugergruppen analysiert. using complementary methods. The analysis of the faunal Die Analyse der Faunendiversität legt eine homogene diversity suggests that the Samos faunas are homogene­ und gleich alte Fauna mit einer normalen taxonomischen ous, equilibrated and with normal taxonomic distribution. Verbreitung nahe. Meso- und micro-wear an Zähnen The faunal composition of the Samos faunas has been deuten eine Dominanz an Ungulaten an, die gemischte analyzed using the Minimum Number of Individuals Nahrung bevorzugten. Dazu gehören Boviden, Equiden (MNI), the taxonomy and the feeding preferences of the und Giraffiden, die für ein offenes Buschland mit dichtem various groups of mammals. Dental meso- and micro-wear Grasbewuchs im Turolium von Samos sprechen. Der analysis indicates the dominance of intermediate feeders Vergleich der Samos Faunen mit zeitgleichen Assoziatio­ among the prevalent ungulates, i.e., the bovids, equids and nen vom kontinentalen Griechenland und aus Kleinasien giraffids, suggesting an open bushland with a thick grassy deuten auf eine nähere Beziehung der Samos Faunen mit herbaceous layer landscape for the Turolian of Samos. The jenen aus dem Osten hin. comparison of the Samos faunas with contemporaneous mammal assemblages from Continental Greece and West­ Schlüsselwörter: Obermiozän, Samos, Griechenland, ern Asia indicates the closer relation of the Samos faunas Säugetiere, Paläoökologie, Paläobiogeographie. with the eastern ones. Keywords: Late Miocene, Samos, Greece, Mammalia, 1. Introduction Palaeoecology, Palaeobiogeography. The palaeoecology of the Greek Neogene mammal fau­ nas fascinated the palaeontologists from the early time Zusammenfassung of their discovery. In the main study of the Pikermi assemblage, G audry (1862-67) already stressed out the Zur Studie der Paläoökologie der fossilen Säugetiere von relations of Pikermi fauna with the recent East African Samos wurden unterschiedliche Methoden verwendet. Die mammal communities. During the last 20 years, several Faunenzusammensetzung von Samos wurde mittels der studies have been carried out, providing new palae- oecological methods and important data on Eurasian Neogene environment. At the same time, a serious effort towards the study of the Neogene palaeoenvi- 1} Prof. George D. K oufos & Dr. Dimitris S. Kostopoulos, ronmental conditions of Greece and the surrounding Aristotle University of Thessaloniki. Department of Geology. areas has been done (Quade et al., 1994; S olounias Laboratory of Geology and Palaeontology. GR-54124 Thes­ 8 c Dawson-S aunders, 1988; Bonis et al., 1992, 1994, saloniki, Greece. e-mail:[email protected], dkostop@geo. 1999; Bonis & Koufos, 1994; Fortelius et al., 1996; auth.gr S olounias et al., 1999; K ostopoulos 8 c K oufos, 2000; Valli, 2005; M erceron et al., 2005a, b, c, 2007a; 2) Dr. Gildas M erceron, UMR CNRS5125-Paleoenvironment S cott 8 cM aga, 2005; Koufos, 2006a; K oufos et al., ôcPaleobiosphere, University Lyon 1-Campus la Doua. FR- 2006; Strömberg et al., 2007). A ll the studies trying 69622 Villeurbanne cedex, France; e-mail: gildas.merceron# to determine the late Miocene palaeoenvironment of univ-lyonl.fr the Southeastern Mediterranean include the mammal ©Verein zur Förderung der Paläontologie am Institut für Paläontologie, Geozentrum Wien 410 Beitr. Palaont., 31, Wien, 2009 faunas of Samos in their data, because they are very 2. Material rich and have been known for many years. Thus, there are several articles referring to the palaeoenvironmental The reconstruction of the palaeoenvironment from the conditions of Samos. fossil faunas strongly depends upon the taphonomy and The palynological analysis of the lower horizons (Ma- the field-work procedures. The newly collected material vratzei Fm. according to K ostopoulos et ah, this from Samos comes from various single lenses formed by volume) of the Miocene deposits of the Mytilinii Basin, fluvial-fluviolacustrine action. The material from Adrianos Samos, tries to give some information about the pal­ ravine (MTL fauna) exceeds 1000 identified specimens aeoenvironmental conditions (Ioakim Sc S olounias, from three well-defined fossil lenses. In Potamies ravine 1985). The Mavratzei Fm is considered to be of middle the MLN (~90 specimens) and M Y T (-130 specimens) Miocene - earliest Vallesian age(K ostopoulos et al., faunas are relatively poor, but they come from single fluvia- this volume). The pollen samples were taken from the tile lenses. The stratigraphic position, the fauna and the age lignitic clays that are placed below a basalt flow dated to of the three faunal assemblages from Samos, discussed in 11.2±0.7 - 10.88±0.4 Ma (W eidmann et ah, 1984). A c­ previous chapters of this volume (Kostopoulos et al., this cording to the recent subdivision of the Neogene, a latest volume; Koufos et al., this volume), are as following: middle Miocene age is quite possible for the pollen. The flora suggests a mixture of dense closed woodland with MLN: early Turolian, -7.5 Ma: Hyaenictitherium cf. w on- swampy areas and more open woodland with a dense gii, Protictitherium eras sum, Hipparion aff. proboscideum, ground cover of grasses (Ioakim & S olounias, 1985). Hipparion aff.prostylum, “Diceros” neumayri, Palaeotragus Although the Mytilinii Fm., including the mammalian rouenii, Palaeotragus sp., Samotherium boissieri, Gazella faunas, is quite younger (<8.0 Ma, see K oufos et ah, pilgrimi, Tragoportax sp., Miotragocerus sp., ^Palaeoryx this volume), the same authors tried to expand their sp. (Koufos, this volume-a; Vlachou Sc Koufos, this results to them as well as to the Greek and Turkish volume; K ostopoulos, this volume-a, b) late Miocene faunas, assuming warm temperate com­ munities, more resembling the European Oligocene M YT: early middle Turolian, -7.3 Ma: “Diceros” neumayri, laurophyllous woodlands. This is, however, in contrast Dihoplus pikermiensis, Ancylotherium pentelicum, Hippa­ to later studies, suggesting that during the Astaracian/ rion cf. proboscideum, Hipparion cf. forstenae, Hipparion Vallesian boundary, the Southeastern Mediterranean prostylum, Hipparion cf. matthewi, Samotherium major, conditions changed to being drier and more open, Sporadotragusparvidens, Gazella pilgrimi, Pachytragus ze- and gradually extended to the west, allowing the malisi n. sp., Palaeoryx sp., }Majoreas sp. (Giaourtsakis, Vallesian Faunal Change with a remarkable renewal this volume; G iaourtsakis Sc K oufos, this volume; in the mammal communities (A gustI et ah, 1999; Kostopoulos, this volume-a, b; Vlachou Sc Koufos, A gust! & A nton, 2002; A gustI et ah, 2003; B onis this volume). et ah, 1992, 1999; K oufos, 2006a). Some years later, S olounias & D awson-S aunders (1988) suggested a M T L A/B/C: late middle Turolian, -7.1 Ma: Pseudomeri- forest-woodland environment, based on the masticatory onespythagorasi, ‘Karminata provocator, Spermophillinus cf. morphology of the Samos and Pikermi late Miocene bredai, Pliospalax cf. sotirisi, Adcrocuta eximia, Hyaenictith­ ruminants. But the stable isotopic analysis of the late erium wongii, Plioviverrops orbignyi, Machairodus giganteus, Miocene Mytilinii Fm. indicates woodlands or forests Metailurus parvulus, Parataxidea maraghana, Choerolopho- for Samos (Quade et ah, 1994). S olounias et ah don pentelici, Zygolophodon turicensis, Orycteropus gaudryi, (1999), using stable isotopes, palaeobotanical data, mas­ Pliohyrax graecus, “Diceros” neumayri, Dihoplus pikermiensis, ticatory patterns and dental microwear also suggested Ancylotherium pentelicum, Hipparion brachypus, Hipparion a sclerophyllous woodland or forest for the “Pikermian dietrichi, Hipparion proboscideum, Hipparion cf. matthewi, Biome”, established during late Miocene in Eastern Hipparion cf. forstenae, Microstonyx major, Palaeotragus Mediterranean and Samos. Recently Stromberg et rouenii, Palaeotragus sp., Samotherium major, Helladoth- ah (2007) studied the evolution of Eastern Mediter­ erium duvernoyi, Gazella pilgrimi, Gazella cf. capricornis, ranean ecosystems, using the phytolith assemblages Gazella mytilinii, Miotragocerus valenciennesi, Tragoportax preserved in direct association with faunas, and they rugosifrons, Sporadotragus parvidens, Skoufotragus laticeps, arrived at the conclusion that the Miocene assem­ Palaeoryx pallasi, Palaeoryx majori, Urmiatherium rugosi­ blages are dominated
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