Georgios Georgalis

Georgios Georgalis
Polish Academy of Sciences | PAN · Institute of Systematics and Evolution of Animals

PhD

About

105
Publications
34,946
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
893
Citations
Citations since 2016
92 Research Items
863 Citations
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
Additional affiliations
September 2020 - September 2021
University of Zurich
Position
  • PostDoc Position
July 2019 - July 2020
Università degli Studi di Torino
Position
  • PostDoc Position
January 2019 - July 2019
Comenius University Bratislava
Position
  • PostDoc Position

Publications

Publications (105)
Article
Full-text available
Turtles of the clade Pan-Trionychidae have a rich fossil record in the Old World, ranging from the Early Cretaceous (Hauterivian) to the Holocene. The clade most probably originated in Asia during the Early Cretaceous but spread from there to the Americas and Europe by the Late Cretaceous, to India and Australia by the Eocene, and to Afro-Arabia by...
Article
Full-text available
Large constrictor snakes, referred to the genera Palaeopython and Paleryx, are an ecologically prominent part of the fauna of Europe during the Paleogene. Most species were named over a century ago and their taxonomy is largely based on isolated vertebrae. Furthermore, the majority of named taxa originate from imprecisely known localities within th...
Article
We here describe abundant new snake material from the late Miocene (MN 13) of Salobreña, Spain. Vertebral morphology suggests a referral of the specimens to the extant psammophiid Psammophis, documenting the first occurrence of this genus in Europe. The diversity and disparity across the vertebral morphology of different psammophiid genera is discu...
Chapter
We give a review of all published Palaeogene snake taxa from all localities worldwide. Several conceptual and material advances in the past two decades—a focus on apomorphies, greater attention to variation, quantification of morphology, and new fossil discoveries—have vivified the fossil record. Particularly noteworthy have been new fossils from G...
Article
Full-text available
The Eocene fossil reptiles from the Bolca Fossil-Lagerstätte (Verona, Italy) have been known in the literature since at least the 1850’ and were the subject of many studies during the second half of the XIX century and the first decades of the XX century. However, with the exception of a few papers, only rare works have been published on the Monte...
Conference Paper
Full-text available
New finds of Varanus marathonensis (Squamata, Varanidae) from the Lower Pliocene locality of Megalo Emvolon, N.Greece increase its local and European record. Despite the fact that important reptile fossil finds were described already in the 19th century, Greek herpetofauna has been systematically ignored by palaeontologists in Greece until the las...
Data
SUPPLEMENTARY APPENDIX 4.S2: Palaeogene snakes Excel file, with complete Lists of all European, North American, South American, African, Asian, and Australian occurrences and valid species. Appendix available in: https://www.cambridge.org/de/academic/subjects/life-sciences/evolutionary-biology/origin-and-early-evolutionary-history-snakes?format=HB...
Data
Supplemental Information: A movie showing the internal structure of a selected Miocene coprolite of the Turów mine, southern Poland (specimen no. GIUS 10-3739/23). DOI: 10.7717/peerj.13652/supp-1
Conference Paper
Full-text available
The horse varieties from Skyros and Rhodes islands are extremely small, reaching shoulder heights of only about one meter. We aim at investigating the evolutionary morphology of these horses of great cultural significance in Greece, as examples of the phenomenon of island evolution. We integrate cranial data from historical literature with data fro...
Data
SUPPLEMENTARY APPENDIX 4.S1: Catalog of Palaeogene snakes Appendix available in: https://www.cambridge.org/de/academic/subjects/life-sciences/evolutionary-biology/origin-and-early-evolutionary-history-snakes?format=HB&isbn=9781108837347
Article
We review in detail the published fossil record of turtles from Sardinia and, in addition, we document previously undescribed specimens for the first time. Among these undescribed specimens, is the oldest occurrence of Testudo hermanni on the island, from the Early Pleistocene of Monte Tuttavista. The turtle fossil record in Sardinia goes back to t...
Article
Full-text available
Excrement-shaped ferruginous masses have been recovered from the Miocene of Turów mine in south-western Poland. These siderite masses have been the subject of much controversy, having been interpreted either as being coprolites, cololithes or pseudofossils created by mechanical deformation of plastic sediment. Here we present the results of mineral...
Article
Archaeological investigations carried out in the cave Zubbio di Cozzo San Pietro, Bagheria, Sicily, revealed the presence of a few skeletal elements of a large-sized tortoise in a funerary area dating to the Copper/Bronze Age. The tortoise has been AMS-dated revealing an age of 12.5 ± 0.5 kyr BP and therefore it pre-dates the funerary activities. T...
Article
Full-text available
An incomplete postcranial skeleton of a snake from the middle Miocene of the Swiss Molasse in Käpfnach mine, near Zurich, Switzerland, is described in this paper. The skeleton is rather crushed and resting on a block of coal, with only some articulated vertebrae partially discerned via visual microscopy. We conducted micro-CT scanning in the specim...
Data
Additional file 1: Model 1. 3D model of the partial skeleton PIMUZ A/ III 191 of Colubriformes indet. from the middle Miocene of Käpfnach, Switzerland.
Data
Additional file 2: Model 2. 3D model of the first segmented vertebra of PIMUZ A/III 191.
Data
Additional file 4. Flythrough video of the micro-CT scan of the partial skeleton PIMUZ A/III 191 of Colubriformes indet. from the middle Miocene of Käpfnach, Switzerland.
Data
Additional file 3: Model 3. 3D model of the second segmented vertebra of PIMUZ A/III 191.
Chapter
The fossil record of squamates (i.e. lizards and snakes) from Greece is reviewed herein. Fossil remains of lizards and snakes in Greece date as back as the early Miocene. Their fossil record spans throughout most of the Neogene and the Quaternary and extends in several localities across both continental and insular parts of the country. All major s...
Chapter
The fossil record of crocodylians from Greece is reviewed herein. Currently absent from the extant herpetofauna of the country (and the whole Europe), however, fossil record attests that crocodylians were present, even if rare and poorly represented (only isolated teeth and one osteoderm have been found so far) during the Miocene. The oldest crocod...
Chapter
The oldest fossil amphibians from Greece are early Miocene in age, and therefore, only the last few millions of years of amphibian evolution are recorded in this country, and all but one (Mioproteus) of the identified taxa are referable to extant genera. No extinct species of amphibians have been described so far on the basis of Greek fossils. Howe...
Article
Full-text available
We here describe a monospecific assemblage of giant aquatic snakes from the middle Eocene of Kpogamé, Togo. The material, consisting of large isolated vertebrae, is referred to Palaeophis africanus , an enigmatic palaeophiid species, which was so far otherwise known only from a limited number of vertebrae from the middle Eocene of Nigeria and Angol...
Conference Paper
The sedimentary basins of Greece contain an important record of fossil vertebrates that has been known and studied for nearly two centuries. Here, we present our collective effort to review and summarize this fossil record. A combination of our original research and previously published records permits the complete reassessment of the identified ve...
Article
Full-text available
This contribution contains the 3D models described and figured in the following publication: Georgalis, G.L., G. Guinot, K.E. Kassegne, Y.Z. Amoudji, A.K.C. Johnson, H. Cappetta and L. Hautier. 2021. An assemblage of giant aquatic snakes (Serpentes, Palaeophiidae) from the Eocene of Togo. Swiss Journal of Palaeontology 140, 20, https://doi.org/10.1...
Preprint
Full-text available
Excrement-shaped siderite masses have been the subject of much controversy. They have been variously interpreted either as being coprolites, cololites or pseudofossils created by mechanical deformation of plastic sediment. Here we report excrement-shaped ferruginous masses recovered from the Miocene of the Turów mine in south-western Poland. Minera...
Data
Additional file 7: Model 7 3D model of the part of the paralectotype of Eoconstrictor spinifer comb. nov. from quarry Cecilie I, Geiseltal: (the most complete) anterior trunk vertebra (GMH Ce I-5822-1926).
Article
Full-text available
Background The earliest Miocene (Aquitanian) represents a crucial time interval in the evolution of European squamates (i.e., lizards and snakes), witnessing a high diversity of taxa, including an array of extinct forms but also representatives of extant genera. We here conduct a taxonomical survey along with a histological/microanatomical approach...
Conference Paper
Full-text available
The sedimentary basins of Greece contain an important record of fossil vertebrates that has been known and studied for nearly two centuries. Here, we present our collective effort to review and summarize this fossil record. A combination of our original research and previously published records permits the complete reassessment of the identified ve...
Data
Additional file 1: Video of the 3D model of left dentary PIMUZA/III 4656 of Janosikia sp.
Data
Additional file 2: Video of the 3D model of the left dentary PIMUZA/III 4656 of Janosikia sp. showing internal vascularization.
Data
Additional file 3: Video of the 3D model of the parietal PIMUZ A/III 4626 of Ophisaurus holeci.
Data
Additional file 4: Video of the 3D model of the parietal PIMUZ A/III 4626 of Ophisaurus holeci showing internal vascularization.
Data
Additional file 5: Video of the 3D model of the parietal PIMUZA/III 4627 of Ophisaurus holeci.
Data
Additional file 6: Video of the 3D model of the parietal PIMUZ A/III 4627 of Ophisaurus holeci showing internal vascularization.
Data
Additional file 1: Model 1 3D model of the holotype of Palaeopython ceciliensis from quarry Cecilie I, Geiseltal: mid-trunk vertebra (GMH Ce I-2978-1926).
Data
Additional file 2: Model 2 3D model of part of the holotype of Eoconstrictor fischeri from Messel: the string of four articulated trunk vertebrae (SMF-ME 929).
Data
Additional file 3: Model 3 3D model of the part of the lectotype (herein designated) of Eoconstrictor spinifer comb. nov. from quarry Cecilie I, Geiseltal: the “block” including the left atlantal neural arch, three almost complete anterior trunk vertebrae, remains of ribs, fragments of other vertebrae, as well as basioccipital, and right prootic (G...
Data
Additional file 4: Model 4 3D model of the part of the lectotype (herein designated) of Eoconstrictor spinifer comb. nov. from quarry Cecilie I, Geiseltal: the parietal (GMH Ce I-5823-1926).
Data
Additional file 5: Model 5 3D model of the part of the lectotype (herein designated) of Eoconstrictor spinifer comb. nov. from quarry Cecilie I, Geiseltal: the right pterygoid (GMH Ce I-5824-1926).
Data
Additional file 6: Model 6 3D model of the part of the lectotype (herein designated) of Eoconstrictor spinifer comb. nov. from quarry Cecilie I, Geiseltal: the right maxilla (GMH Ce I-5826-1926).
Article
Full-text available
We here describe a small turtle assemblage originating from the early Tortonian (late Miocene) palaeoisland of Scontrone, central Italy, a locality previously known mostly for its endemic mammals and giant birds, which were otherwise shared only with the Gargano localities, another fossiferous area belonging to the same palaeobioprovince. The fossi...
Article
Pan‐trionychids (soft‐shelled turtles) are known from the Neogene and Quaternary fossil record of Africa. They have so far been totally absent in Palaeogene localities of the continent although they are commonly found in Palaeogene localities across Europe, North America, and Australasia; as such, their absence from the Palaeogene of Africa has bee...
Article
Full-text available
The Pliocene–Pleistocene transition in the Neotropics is poorly understood despite the major climatic changes that occurred at the onset of the Quaternary. The San Gregorio Formation, the younger unit of the Urumaco Sequence, preserves a fauna that documents this critical transition. We report stingrays, freshwater bony fishes, amphibians, crocodil...
Article
Full-text available
A long-forgotten, old collection of lizards from the Phosphorites du Quercy in southern France, housed in the Naturhistorisches Museum in Vienna (NHMW), is described in detail in this paper. The material, consisting of several almost complete cranial and postcranial disarticulated elements, originates from different, imprecisely known localities. N...
Article
Full-text available
We describe here new amphibian and reptile remains from three Oligocene localities of Turkey. Two of the localities (Kavakdere and Kocayarma) are situated in southeastern Europe and the other one (Kargi 2) in Anatolia, both areas where Oligocene herpetofauna is practically almost unknown. The material consists of albanerpetontids, pelobatid anurans...
Article
Turtles of the clade Testudinoidea have a rather scarce fossil record in Afro-Arabia, ranging from the late Eocene up to the Quaternary. The vast majority of testudinoid fossils from Afro-Arabia are ascribed to Testudinidae, which has had a continuous presence in the area since the late Eocene. Geoemydidae is poorly documented by fragments found th...
Article
Full-text available
Over the last 25 years, researchers, mostly paleontologists, have developed a system of rank-free, phylogenetically defined names for the primary clades of turtles. As these names are not considered established by the PhyloCode, the newly created nomenclatural system that governs the naming of clades, we take the opportunity to convert the vast maj...
Article
Full-text available
We here describe turtle remains from the late Miocene (Tortonian) of Cessaniti (Calabria, southern Italy), an area that recently has been palaeogeographically reconstructed as being, at that time of the Neogene, directly connected (or at least rather proximate) to northern Africa, instead of Europe. The material pertains to three different turtle c...
Article
Full-text available
In this paper, we describe pleurodire turtle material from the island of Sardinia, Italy, originating from two Eocene localities of the Cixerri Formation. The more complete among the two specimens bears strong resemblance with the continental Western European Eocenochelus eremberti and is tentatively referred to the same species, while the second,...
Article
Pythonids are fascinating extant reptiles comprising exclusively non-venomous Old-World taxa and including some of the largest known snakes (Murphy and Henderson, 1997). Being thermophilous reptiles, they are distributed in tropical and sub-tropical areas in sub-Saharan Africa, southern and southeastern Asia, Philippines, Indonesia, New Guinea, and...
Article
Together with the rest of the Balkan Peninsula, Greece acted as a refuge for thermophilic amphibians and reptiles during the Quaternary Glaciations. In this work we provide new herpetological data on the latest Early Pleistocene locality of Kaiafas, in western Peloponnese. The site yielded one indeterminate salamandrid urodelan (Salamandridae indet...
Article
The world-famous upper Miocene fossil localities on the Aegean island of Samos in Greece have produced a rich fossil record that sheds light on the evolution of eastern Mediterranean terrestrial faunas over a one-million-year interval of the late Neogene. Fossils have been discovered on Samos since antiquity, although a succession of paleontologica...
Article
Full-text available
Recent advances in the phylogenetic relationships of snakes using both molecular and morphological data have generally demonstrated a close relationship between boas and pythons but also induced nomenclatural changes that rob the least inclusive clade to which both belong of a name. This name would be tremendously useful, because it is the least in...
Article
Full-text available
Lizard and snake remains from the early Miocene (Burdigalian) of the Moghra Formation, Egypt, are described herein. This material comprises the first fossil remains of squamates recovered from the otherwise rich and well known vertebrate assemblage of Moghra. The material pertains to two different genera, the varanid lizard Varanus and the pythonid...
Article
Full-text available
We here redescribe Palaeophis oweni, an almost neglected species of palaeophiid snakes from the Eocene of Monte Duello, northeastern Italy. Despite having been described since the 19th century and being the only known named species of its genus from Mediterranean Europe, P. oweni has so far received only minor and sporadic attention in the literatu...
Article
Full-text available
We here describe turtle remains from the late Miocene (Tortonian) of Cessaniti (Calabria, southern Italy), an area that recently has been palaeogeographically reconstructed as being, at that time of the Neogene, directly connected (or at least rather proximate) to northern Africa, instead of Europe. The material pertains to three different turtle c...
Article
We herein describe the amphibians and reptiles from the Ptolemais fossil assemblage, originating from 12 nearby localities in northwestern Greece, spanning from the late Miocene (MN 13) to the early Pliocene (MN 15). Amphibians are known exclusively of anurans, with the genera Latonia and Rana being identified, the latter constituting the oldest so...
Article
This article deals with the fossil tortoises of one of the most iconic fossil localities of the Neogene of the Old World, the upper Miocene locality of Pikermi, near Athens, Greece. We describe the type, previously published, and new material of the fossil tortoises from Pikermi, along with new material from the coeval Azmaka 6 locality in Bulgaria...
Article
We herein describe Sardophis elaphoides Georgalis & Delfino n. gen. n. sp., a new snake taxon from the early Pleistocene of Monte Tuttavista VI, Sardinia, Italy. Sardophis elaphoides Georgalis & Delfino n. gen. n. sp. possesses a distinct vertebral anatomy and is diagnosed by a unique combination of features. The new Sardinian taxon is further comp...
Article
Full-text available
We herein describe the fossil amphibians and reptiles from the Neogene (latest Miocene or earliest Pliocene; MN 13/14) locality of Maramena, in northern Greece. The herpetofauna is shown to be extremely diverse, comprising at least 30 different taxa. Amphibians include at least six urodelan (Cryptobranchidae indet., Salamandrina sp., Lissotriton sp...
Article
Full-text available
I here describe new fossil remains of lizards and snakes from the late Miocene of Pikermi, near Athens, Greece. This classical locality, known since at least the middle of the 19th century, has yielded over the decades abundant mammal fossils, whereas squamate remains have been confined to early discoveries of Varanus remains during the 19th centur...
Article
Full-text available
The fauna of amphibians and reptiles (except turtles) from the early Miocene localities of the Kilçak section (Tur-key) is described here. The herpetofaunal assemblage of the Kilçak localities is the best documented early Mio-cene herpetofauna in Anatolia. The following taxa are revealed: Salamandra sp., Latonia sp., Eopelobates sp., Crocodylia ind...
Conference Paper
Full-text available
Osteological information for extant amphibians and reptiles is scattered through numerous papers and books; this hinders a precise perception of what is known and what is not. In order to aggregate in a synthetic way the available published information and to determine which taxa and topics warrant further attention, we started to compile an online...
Article
We here describe new remains of amphibians and reptiles from the early Miocene (MN 4) of two different Greek localities, Aliveri and Karydia. The newly described material consists of urodelans, alytids, indeterminate anurans, turtles, crocodylians, lacertids, indeterminate scincomorphs, anguids, colubrids, viperids, and indeterminate snakes. The pr...
Article
Full-text available
The lizard and snake fauna from the late middle–late Eocene (MP 16–MP 20) of Dielsdorf, near Zurich, Switzerland, is described comprehensively in this paper. Detailed comparisons of the Dielsdorf material with other extinct taxa allow us to establish a new species of the large “booid” genus Palaeopython, i.e., Palaeopython helveticus sp. nov., char...
Article
Full-text available
INTRODUCTION CT scanning was conducted in three different-sized snake vertebrae of Palaeopython helveticus sp. nov., including its holotype PIMUZ A/III 634, from Eocene fissure fills at Dielsdorf, near Zurich, Switzerland (e.g., Rosselet, 1991) in order to detect and evaluate ontogenetic variability in these fossils. In addition, a dentary of Palae...