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The Late Miocene Mammal Faunas of the Mytilinii Basin, Samos Island, Greece: New Collection - 10

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The Late Miocene Mammal Faunas of the Mytilinii Basin, Samos Island, Greece: New Collection - 10 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): Giaourtsakis Ioannis X., Koufos George D. Artikel/Article: The Late Miocene Mammal Faunas of the Mytilinii Basin, Samos Island, Greece: New Collection - 10. Chalicotheriidae 189-205 ©Verein zur Förderung der Paläontologie am Institut für Paläontologie, Geozentrum Wien Beitr. Paläont., 31:189-205, Wien 2009 The Late Miocene Mammal Faunas of the Mytilinii Basin, Samos Island, Greece: New Collection 10. Chalicotheriidae by Ioannis X. Giaourtsakis1* & George D. Koufos2* G iaourtsakis, I.X. &K oufos, G.D., 2009. The Late Miocene Mammal Faunas of the Mytilinii Basin, Samos Island, Greece: New Collection. 10. Chalicotheriidae. — Beitr. Palaont., 31:189-205, Wien. Abstract (Griechenland). Einige der postcranialen Elemente wer­ den zum ersten Mal aus dieser Fundstelle beschrieben. Die In the present study, we describe several postcranial neuen Funde werden mit dem bisher bekannten Material elements ofAncylotherium pentelicum (Chalicotheriidae, dieser A rt, sowie mit dem anderer Chalicotherien-Arten Schizotheriinae) from the island of Samos (Greece), some verglichen. Die miozänen Fundstellen mit Chalicothe­ of which are recorded for the first time from this site. riinae- und Schizotheriinae-Funden aus dem östlichen The material is compared to the known hypodigm of the Mittelmeerraum und benachbarter Regionen werden species, as well as with other chalicotheres. The known zusammengefasst und ausgewertet. Potenzielle paläo- Miocene record of the two chalicothere subfamilies, ökologische Präferenzen beider Unterfamilien werden Chalicotheriinae and Schizotheriinae, in the Eastern kurz besprochen. Die Anwesenheit des Schizotheriinen Mediterranean and adjacent regions is briefly reviewed A. pentelicum und das Fehlen von Chalicotheriinae in den and evaluated. The potential paleoecological preferences turolischen Wirbeltierfaunen von Samos und Anatolien ot both subfamilies are briefly discussed. The presence of deuten auf die Verbreitung von mehr offenen Lebensräu­ the schizotheriine A. pentelicum and the absence of any men in der Umgebung dieser Fundstellen hin, anders als chalicotheriine species in the Turolian faunal assemblages im Vergleich zum kontinentalen Griechenland, FYR of of Samos and Anatolia indicate the expansion of more Macedonia und Bulgarien. open habitats in these localities compared to continental Greece, FYR of Macedonia and Bulgaria. Schlüsselworte: Turolium, Samos, Griechenland, Mam­ malia, Perissodactyla, Chalicotheriidae, Systematik. Keywords: Turolian, Samos, Greece, Mammalia, Peris- sodactyla, Chalicotheriidae, Systematics. 1. Introduction Zusammenfassung Ancylotherium pentelicum is a characteristic but rare element of the Late Miocene faunas in the Eastern Mediterranean In der vorliegenden Untersuchung beschreiben wir neu­ and adjacent regions. The first specimens from the island of es postcraniales Material von Ancylotherium pentelicum Samos were mentioned in a short report byM ajor (1888). (Chalicotheriidae, Schizotheriinae) von der Insel Samos A few years later,M ajor (1894) recorded several specimens of A. pentelicum in the collections of M CGL, Lausanne, and drew attention to an almost complete forelimb be­ longing to one individual. Schlosser (1921) mentioned Dipl.-Geol. IoannisX . G iaourtsakis , Ludwig-Maximilians- the presence ofA. pentelicum specimens among the Samos University of Munich, Department of Geo- and Environmen­ collection of the BSPG in Munich. D ietrich (1928:Abb. tal Sciences, Section of Paleontology, Richard-Wagner-Str. 1) illustrated a left juvenile mandibular fragment from 10, D-80333 Munich, Germany, e-mail: i.giaourtsakis@lrz. the collections of the MNHB in Berlin. Schaub (1943) tmi-muenchen.de documented in detail the forelimb material of the M CGL reported by M ajor (1894) together with some additional 2) Prof. George D. K o u f o s , Aristotle University ofThessaloniki. specimens from BSPG, MNHN and BMNH. Schaub’s Department of Geology, Laboratory of Geology and Palaeon- (1943) analysis on the osteology and functional anatomy tology, GR-54124 Thessaloniki, Greece, e-mail: georgeko@ of the forelimb ofA. pentelicum has been used ever since as geo.auth.gr; [email protected] a standard reference for numerous subsequent studies on ©Verein zur Förderung der Paläontologie am Institut für Paläontologie, Geozentrum Wien 190 Beitr. Paläont., 31, Wien, 2009 chalicotheres. Recently, G eraads et al. (2006) recorded ing institutions: Athens Museum of Paleontology and several upper deciduous tooth series from Samos housed Geology, University of Athens (AMPG); Laboratory of at the collections of M CG L and illustrated two of them Geology and Palaeontology, University of Thessaloniki (Geraads et al., 2006:P1. 1, figs. 2, 3). In the present (LGPUT); Bayerische Staatssammlung für Paläontologie study, we describe new material of postcranial elements und Geologie, München (BSPG); Staatliches Museum für of A. pentelicum from the island of Samos. In particular, Naturkunde, Stuttgart (SMNS); Hessisches Landesmu­ elements of the hind limb are recorded for the first time seum, Darmstadt (HLMD); Museum für Naturkunde der from this site. The studied material was unearthed from Humboldt Universität zu Berlin (MNHB); Musée Can­ two localities, Mytilinii-3 (MYT) and Mytilinii-1 (MTL). tonal de Géologie, Lausanne (MCGL); Naturhistorisches The locality M Y T is situated in Potamies ravine and is Museum, Wien (NHMW ); Muséum National d’Histoire dated to early middle Turolian (early MN 12) at ~7.3 Naturelle, Paris (MNHN); British Museum of Natural Ma. The locality M TL is located in Adrianos ravine and History (= Natural History Museum), London (BMNH). consists of several fossiliferous sites; the chalicotheres have Comparisons with North American schizotheriines are been traced in the sites M TL A and MTLB, dated to the based primarily on C oombs (1978, 1979, 2004), as well uppermost middle Turolian at ~7.1 Ma. Detailed infor­ as Holland & Peterson (1914). mation about the geological and stratigraphical setting of the different fossiliferous sites of Samos is provided by Abbreviations: Kostopoulos et al. (this volume) and Koufos et al. (this L: length; DT: transversal diameter; DAP: anteroposterior (dor- volume). Historical data about the excavations in Samos soplantar) diameter; Prox: proximal; Dist: distal; Dia: diaphysis; is given by Koufos (this volume). Art: articular surface; max.: maximum. The generaAncylotherium, Moropus, and Tylocephalonyx are 2. Material and Methods abbreviated, while the generaAnisodon, Metaschizotherium, and Kalimantsia are not abbreviated. The specimens ofAncylotherium pentelicum described in the present article are stored in the collections of the Natural History Museum of the Aegean, Mytilinii, Samos 3. Systematic Palaeontology (NHMA). Methodology of postcranial measurements fol­ lows Roussiakis & T heodorou (2001), including a few Order Perissodactyla O wen, 1848 additional measurements. Measurements ranging 0-150 Family Chalicotheriidae G ill, 1872 mm were taken with a digital caliper precise to 0.01 mm Subfamily Schizotheriinae Holland and rounded to the nearest 0.1 mm. For larger measure­ & P eterson, 1914 ments, a vernier caliper with a precision of 0.1 mm was applied. A ll measurements are given in millimeters (mm). Genus Ancylotherium, G audry, 1863 For specimens from Pikermi and Halmyropotamos, the values o f Roussiakis & T heodorou (2001) were in most Ancylotherium pentelicum (Gaudry & Lartet, 1856) cases preserved, as no significant interobserver difference (Plates 1, 2) was found. In the present study, Ancylotherium and Metaschizoth- Localities: Mytilinii-1 A, IB, (MTLA, MTLB), Adri­ erium are treated as two separate genera(K oenigswald, anos ravine, Mytilinii Basin, Samos, Greece; Mytili­ 1932; Butler, 1965; Roussiakis & T heodorou, 2001; nii-3 (MYT), Potamies ravine, Mytilinii Basin, Samos, G eraads et al., 2007). A subgeneric treatment between Greece. Ancylotherium and Metaschizotherium, as suggested by Age: Middle Turolian, MN 12 (late Miocene). Zapfe (1967) and C oombs (1974, 1989), may be equally M ytilinii-lA (M TLA, B): ~7.1Ma. reasonable. However, since the available record ofMetas­ Mytilinii-3 (MYT): ~7.3 Ma. chizotherium limited at present, and no cranial and suf­ Material: ficient postcranial evidence has been reported, we prefer MTLA: Right Mt-III, MTLA-277; ungual phalanx, to keep them separate at generic level. A discussion on M TLA-485. the inapplicability of other generic names{Macrotherium, MTLB: Left radius and ulna, M TLB-173; right radius Colodus, Nestoritherium), previously used forAncylotherium and ulna, M TLB-328; left femur, MTLB-338. pentelicum, is provided by Roussiakis & Theodorou MYT: Proximal phalanx, MYT-15; right Mt-III, MYT- (2001). Systematic recommendations for Asian and North 64. American Schizotheriinae follow C oombs (1989, 2004). Measurements: The measurements are given in Tables Chalicotheriinae nomenclature and taxonomy follow the 1-3. recent analysis byA nquentin et al. (2007), but for dif­ ferent perspectives compare alsoB onis et al. (1995) and Description: G eraads et al. (2001, 2006). Radius and ulna. Radii and ulnae of A. pentelicum are Comparisons with Eurasian and African chalicotheres presently known from Pikermi and Samos.G audry (1863) have been carried out in the collections of the follow­ described
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