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Alexandros Xafis
University of Vienna
7Publications
2H-index
12Citations
Publications 7
Newest
#1Alexandros Xafis (University of Vienna)H-Index: 2
#2Serdar Mayda (Ege University)H-Index: 10
Last.Kazım Halaçlar (CAS: Chinese Academy of Sciences)H-Index: 2
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Abstract The fossiliferous site at Kavakdere is one of many important late Miocene fossil mammal-bearing localities in Anatolia. Previous taxonomic studies on its fauna have revealed a plethora of taxa. However, the fossil Giraffidae from this early Turolian locality were until now poorly documented. New comprehensive descriptions, comparisons and metric analyses using all accessible Giraffidae specimens from Kavakdere suggest the co-occurrence of five different giraffid taxa. These include Hell...
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#1Friðgeir Grímsson (University of Vienna)H-Index: 16
#2Shirley A. Graham (Missouri Botanical Garden)H-Index: 6
Last.Reinhard Zetter (University of Vienna)H-Index: 21
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The pantropical Picrodendraceae produce mostly spheroidal to slightly oblate, echinate pollen grains equipped with narrow circular to elliptic pori that can be hard to identify to family level in both extant and fossil material using light microscopy only. Fossil pollen of the family have been described from the Paleogene of America, Antarctica, Australia, New Zealand, and Europe, but until now none have been reported from Afro-India. Extant pollen described here include representatives from all...
1 CitationsSource
#1Friðgeir Grímsson (University of Vienna)H-Index: 16
#2Bonnie F. Jacobs (SMU: Southern Methodist University)H-Index: 22
Last.Reinhard Zetter (University of Vienna)H-Index: 21
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AbstractThe palm family, Arecaceae, is notoriously depauperate in Africa today, and its evolutionary, paleobiogeographic, and extinction history there are not well documented by fossils. In this article we report the pollen of two new extinct species of the small genus, Sclerosperma (Arecoideae), from a late Oligocene (27–28 Ma) stratum exposed along the Guang River in Chilga Wereda of north-western Ethiopia. The pollen are triporate, and the two taxa can be distinguished from each other and fro...
1 CitationsSource
#1Friðgeir Grímsson (University of Vienna)H-Index: 16
#2Johan L. C. H. Van Valkenburg (National Herbarium of the Netherlands)H-Index: 1
Last.Reinhard Zetter (University of Vienna)H-Index: 21
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AbstractThree currently accepted Sclerosperma species appear to produce four different pollen morphologies. Sclerosperma mannii and S. walkeri pollen share the same distinct reticulate sculpture, but S. profizianum produces three different pollen types (microreticulate, fossulate, and perforate). The pollen morphology suggests that S. mannii and S. walkeri are sister taxa of the same intrageneric lineage. The pollen diversity observed in S. profizianum suggests (a) this taxon is unique regarding...
2 CitationsSource
#1Friðgeir Grímsson (University of Vienna)H-Index: 16
#2Alexandros Xafis (University of Vienna)H-Index: 2
Last.Reinhard Zetter (University of Vienna)H-Index: 21
view all 6 authors...
AbstractAn ongoing re-investigation of the early Miocene Saldanha Bay (South Africa) palynoflora, using combined light and scanning electron microscopy (single grain method), is revealing several pollen types new to the African fossil record. One of the elements identified is Loranthaceae pollen. These grains represent the first and only fossil record of Loranthaceae in Africa. The fossil pollen grains resemble those produced by the core Lorantheae and are comparable to recent Asian as well as s...
1 CitationsSource
#2Alexandros XafisH-Index: 2
Last.Reinhard ZetterH-Index: 21
view all 4 authors...
2 CitationsSource
#1Alexandros Xafis (University of Vienna)H-Index: 2
#2Doris Nagel (University of Vienna)H-Index: 12
Last.Katharina Bastl (Medical University of Vienna)H-Index: 11
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Abstract Low magnification dental microwear constitutes one of the most important proxies on the ecology and evolution of diet in mammals. Numerous studies have been established on the reconstruction of dietary ecology of even-toed and carnivorous taxa. To date, these studies have used the second permanent molars or carnassials exclusively, for ungulates or carnivores, respectively. In this study, for the first time, premolars and non-carnassials of artiodactyls and carnivores, respectively, wer...
5 CitationsSource
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