Hans de Bruijn
Utrecht University
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Featured researches published by Hans de Bruijn.
Archive | 1990
Muhsin Sümengen; Engin Ünay; Gerçek Saraç; Hans de Bruijn; İsmail Terlemez; Mustafa Gürbüz
Mapping projects in continental Tertiary basins under the auspices of the M.T.A. (Mineral Exploration and Research Institute of Turkey) led in recent years to the discovery of many sites yielding small mammals from formations that were previously considered to be unfossiliferous. This study gives a brief account of the lithostratigraphy and biostratigraphy of the continental deposits of the southern part of the Kayseri-Sivas basin. The rodent assemblages collected in that area are ranging in age from the Middle Oligocene to the early Pliocene, showing a gap in the early Miocene. We have filled this hiatus in our knowledge by studying two assemblages from successive levels in the lignite quarry of Harami (Aksehir area).
Geobios | 1992
Hans de Bruijn; Engin Ünay; Lars Van Den Hoek Ostende; Gerçek Saraç
Abstract The association of smaller mammals from the locality Inkonak M.R. 6 in the upper part of the Dokmeta§ memberof the Cevizcik Formation is described. Seven genera and species of rodents and three genera and species of insectivores are recognized. Two new genera and species of muroids: Meteamys alpani and Muhsinia steffensi are defined. Comparison of the Early Miocene association from Inkonak M.R. 6 with the older association from Yenikoy and the younger ones from Kilcak suggests a rapid change in the rodent fauna of Anatolia during the Late Oligocene and Early Miocene.
Journal of Vertebrate Paleontology | 2013
A.A. Bosma; Hans de Bruijn; Wilma Wessels
ABSTRACT Isolated cheek teeth of Sciuridae (Rodentia, Mammalia) from nine late Miocene localities in central Anatolia (Turkey) are described. The teeth represent at least 12 different species, five of which belong to the ground squirrel genus Tamias, two to the ground squirrel genus Spermophilinus, one to the flying squirrel genus Hylopetes, and two to the flying squirrel genus Pliopetaurista. One species, Tamias anatoliensis (type locality Altintaş 1), is new. An unknown genus and species of giant tree or ground squirrel is represented by one tooth. Two teeth probably form the oldest record in western Eurasia of the tree squirrel genus Sciurus. Seven of the localities that yielded Sciuridae are lacustrine deposits, two are karst fissure fills. Their estimated ages range from MN 9 to MN 13. The majority of late Miocene Sciuridae from Anatolia show affinities with European sciurids of the same period.
Palaeontologische Zeitschrift | 1981
Gudrun Daxner-Höck; Wien-Salzburg; Hans de Bruijn
Five dormice species belonging to five genera have been recognized at Eichkogel:Vasseuromys thenii nov. spec., Muscatdinus pliocaenicus Kowalski 1963,Myomimus dehmi (De Bruijn 1966),Glirulus lissiensis HuguEnEy & Mein 1965 and a glirid gen. et spec, indet. Petauristinae, Eomyidae and most of the Gliridae representing almost half to the Eichkogel rodent species are thought to have inhabited moist woodlands.KurzfassungIn der Fauna des Eichkogels kommen fünf Arten von Schlafmäusen vor, die fünf Gattungen angehoren:Vasseuromys thenii nov. spec.,Muscardinus pliocaenicusKowalski 1963,Myomimus dehmi (De Bruijn 1966),Glirulus lissiensis HugUeney & Mein 1965 und Gliride gen. et spec. indet. Petauristinae, Eomydae und ein großer Teil def Gliridae repräsentiefen Wald-und Buscwaldbewohner und umfassen fast die Hälfte der Nagetierspecies der Eichkogelfauna.
Palaeobiodiversity and Palaeoenvironments | 2018
Hans de Bruijn; Zoran Marković; Wilma Wessels; Miloš Milivojević; Andrew A. van de Weerd
Seven new rodent faunas are described from the Pčinja and Babušnica-Koritnica basins of south-east Serbia. The geology of the Tertiary deposits in the Pčinja and Koritnica-Babušnica basins of south-east Serbia is briefly reviewed. The fossil content of the new vertebrate localities is listed, and an inventory of the rodent associations is presented. The rodent associations are late Eocene-early Oligocene in age, interpreted on biostratigraphical grounds. These are the first rodent faunas of that age from the Balkan area, an important palaeogeographic location between Europe and Asia. The Muridae, with the subfamilies Pseudocricetodontinae, Paracricetodontinae, Pappocricetodontinae, Melissiodontinae and ?Spalacinae, are dominant with eight genera, four of which are new. The diversity of the Melissiodontinae and Paracricetodontinae in the faunas suggests that these subfamilies originated in this region. The bi-lophodont cheek teeth occurring in the Oligocene assemblages are identified as the first record of the Diatomyidae outside of Asia. In light of the large amount of new data, the palaeogeographic setting and faunal turnover of the Eocene-Oligocene is discussed.
Palaeobiodiversity and Palaeoenvironments | 2015
Hans de Bruijn; A.A. Bosma; Wilma Wessels
The reconstruction of the evolutionary history of the Rhizomyinae and the Spalacinae based on the fossil record strongly suggests that these do not share the same murid ancestor and developed separately since the early Oligocene. This conclusion is supported by the difference in evolutionary dynamics between these groups during the Miocene and Pliocene. Molecular genetic studies of extant representatives of the Rhizomyinae, Spalacinae and Myospalacinae, however, suggest that these subfamilies share similarities that distinguish them from all other Muridae. As a result, geneticists unite these subfamilies into the family Spalacidae and consider the Spalacidae and the Muridae to be sister lineages. Until the conflict between the two disciplines is resolved we prefer to maintain the Rhizomyinae and the Spalacinae as two subfamilies within the family Muridae (superfamily Muroidea).
Palaeobiodiversity and Palaeoenvironments | 2018
Wilma Wessels; Andrew A. van de Weerd; Hans de Bruijn; Zoran Marković
Isolated teeth of Melissiodontinae from two Eocene and four Oligocene localities in southeastern Serbia are described. One new genus and two new species are named. The study of the derived morphology of the cheek teeth and of the contrastingly primordial microstructure of the tooth enamel of this diverse material provides a glimpse into the early history of the subfamily. The supposedly Asian murid ancestor of the Melissiodontinae seems to have reached the Serbian-Macedonian land area during the early or middle Eocene, which is shortly after the split up of the Muridae and Dipodidae and before the ‘Grande Coupure’ of central and Western Europe. We interpret the rapid consequent specialisation of the morphology of the chewing apparatus of the Melissiodontinae as an adaptation to feeding on small invertebrates on the floor of the Eocene forest.
Historical Biology | 2017
Hans de Bruijn
Abstract The cheek teeth of Debruijnia kostakii n. sp. from the Early Miocene of Karydia are only slightly smaller than those of the largest extant species of the Spalacinae (Spalax giganteus), but show characteristics that are reminiscent of its Paleogene cricetid ancestor. The peculiar combination of large size and primitive dental morphology of this species bridges the gap between Debruijnia and Pliospalax and thereby supports the hypothesis that these genera form the core of the complex evolutionary history leading to extant Spalax.AbstractThe cheek teeth of Debruijnia kostakii n. sp. from the Early Miocene of Karydia are only slightly smaller than those of the largest extant species of the Spalacinae (Spalax giganteus), but show characteristics that are reminiscent of its Paleogene cricetid ancestor. The peculiar combination of large size and primitive dental morphology of this species bridges the gap between Debruijnia and Pliospalax and thereby supports the hypothesis that these genera form the core of the complex evolutionary history leading to extant Spalax.
Geobios | 1978
Anne van de Weerd; Hans de Bruijn
Abstract Mus (Acomys?) gaudryi DAMES, 1883 (1) is considered to be the type species of Parapodemus, because “the type of any taxon, once fixed in conformity with the provisions of the international code of zoological nomenclature, is not subject to change except by exercise of the plenary powers of the commission” (see art. 61 and 70 of the code). Parapodemus schaubi PAPP, 1947 (2) is considered to be a junior synonym of P. gaudryi. The late Turolian Apodemus primaevus HUGUENEY and MEIN, 1965 (3), and A. gudrunae VAN DE WEERD, 1976 (4), are sufficiently different from one another and from P. gaudryi to warrant their recognition as separate species.
Palaeobiodiversity and Palaeoenvironments | 2018
Andrew A. van de Weerd; Hans de Bruijn; Zoran Marković; Wilma Wessels
Three Paracricetodon species from the late Eocene locality Buštranje and the Early Oligocene localities Valniš, Strelac-1, -2, -3 and Raljin (south-east Serbia) are described; Paracricetodon dehmi Hrubesch, 1957 and two new species: Paracricetodon stojanovici and P. gracilis. A review of Paracricetodon species suggests that the species P. spectabilis, P. cadurcensis, P. dehmi, P. walgeri and P. wentgesi are primarily distinct in size. Paracricetodon kavakderensis and P. kodjayarmensis from Turkish Trace are considered junior synonyms of P. dehmi. The diversity and abundance of the Paracricetodontinae in the rodent assemblages from Serbia is not known from elsewhere and suggest that they underwent a radiation on the Serbian-Macedonian land area.