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Zbigniew Szyndlar - One of the best experts on this subject based on the ideXlab platform.
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The snakes (Reptilia, Serpentes) of the Miocene of Portugal
2009Co-Authors: Zbigniew SzyndlarAbstract:Key-words: Snakes (Reptilia); Boids; Colubrids; Oriental vipers; Miocene; Portugal. The ophidian fauna coming from the Miocene of Amor (MN 5), Quinta das Pedreiras and Quinta do Pombeiro (both MN4) (Portugal) consists of the following taxa: cf. Bavarioboa sp. (Boidae); cf. Coluber sp. (Colubridae); two unidentified Colubridac; Vipera sp. ("Oriental vipers" complex) (Viperidae). The assemblage is characteristic for the lower/middle Miocene transition and it resembles snake faunas known from other European localities of similar age.
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Snake fauna (Reptilia: Serpentes) from the Early/Middle Miocene of Sandelzhausen and Rothenstein 13 (Germany)
Paläontologische Zeitschrift, 2009Co-Authors: Zbigniew SzyndlarAbstract:The Early/Middle Miocene (European Land Mammal Zone MN5) localities of Sandelzhausen and Rothenstein 13 in southern Germany have yielded remains of about 13 ophidian taxa: Eoanilius sp. (Aniliidae), Bavarioboa ultima (Boidae), “ Coluber ” sp., ? Telescopus sp., Natrix sp., cf. Natrix sp., cf. “ Neonatrix ” sp., unidentified “colubrines” and “natricines” (Colubridae), Naja sp., an unidentified elapid (Elapidae), Vipera sp. (“Oriental viper”), Vipera sp. (“ aspis complex”) (Viperidae). Both faunas document a transitional phase from those reported from several late Early and Middle Miocene sites of Central and Western Europe. The climates of Sandelzhausen and Rothenstein 13, as indicated by ophidian fossils, were warm, although not tropical or subtropical. Aus den unter-/mittelmiozänen (Europäische Landsäuger Zone MN5) Fossilfundstellen Sandelzhausen und Rothenstein 13 in Süddeutschland sind Reste von 13 Schlangentaxa überliefert: Eoanilius sp. (Aniliidae), Bavarioboa ultima (Boidae), “ Coluber ” sp., ? Telescopus sp., Natrix sp., cf. Natrix sp., cf. “ Neonatrix ” sp., nicht näher identifizierte “colubrine” und “natricine” Schlangen (Colubridae), Naja sp., ein nicht näher identifizierter Vertreter der Elapidae, Vipera sp. (“Orientalische Viper”), Vipera sp. (“ aspis- Komplex”) (Viperidae). Beide Faunen repräsentieren ein Übergangsstadium zwischen Vergesellschaftungen anderer mittel- und westeuropäischer Fundstellen aus dem späten Unter- und Mittelmiozän. Die Schlangenfossilien zeigen für Sandelzhausen und Rothenstein13 ein warmes, aber nicht tropisches oder subtropisches Klima an.
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Snake fauna (Reptilia: Serpentes) from the Early/Middle Miocene of Sandelzhausen and Rothenstein 13 (Germany)
Paläontologische Zeitschrift, 2009Co-Authors: Zbigniew SzyndlarAbstract:The Early/Middle Miocene (European Land Mammal Zone MN5) localities of Sandelzhausen and Rothenstein 13 in southern Germany have yielded remains of about 13 ophidian taxa: Eoanilius sp. (Aniliidae), Bavarioboa ultima (Boidae), “ Coluber ” sp., ? Telescopus sp., Natrix sp., cf. Natrix sp., cf. “ Neonatrix ” sp., unidentified “colubrines” and “natricines” (Colubridae), Naja sp., an unidentified elapid (Elapidae), Vipera sp. (“Oriental viper”), Vipera sp. (“ aspis complex”) (Viperidae). Both faunas document a transitional phase from those reported from several late Early and Middle Miocene sites of Central and Western Europe. The climates of Sandelzhausen and Rothenstein 13, as indicated by ophidian fossils, were warm, although not tropical or subtropical. Aus den unter-/mittelmiozänen (Europäische Landsäuger Zone MN5) Fossilfundstellen Sandelzhausen und Rothenstein 13 in Süddeutschland sind Reste von 13 Schlangentaxa überliefert: Eoanilius sp. (Aniliidae), Bavarioboa ultima (Boidae), “ Coluber ” sp., ? Telescopus sp., Natrix sp., cf. Natrix sp., cf. “ Neonatrix ” sp., nicht näher identifizierte “colubrine” und “natricine” Schlangen (Colubridae), Naja sp., ein nicht näher identifizierter Vertreter der Elapidae, Vipera sp. (“Orientalische Viper”), Vipera sp. (“ aspis- Komplex”) (Viperidae). Beide Faunen repräsentieren ein Übergangsstadium zwischen Vergesellschaftungen anderer mittel- und westeuropäischer Fundstellen aus dem späten Unter- und Mittelmiozän. Die Schlangenfossilien zeigen für Sandelzhausen und Rothenstein13 ein warmes, aber nicht tropisches oder subtropisches Klima an.
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Oligocene snakes of southern Germany
Journal of Vertebrate Paleontology, 1994Co-Authors: Zbigniew SzyndlarAbstract:ABSTRACT Sites in the middle Oligocene (Herrlingen 7, Ehrenstein 12) and upper Oligocene (Ehrenstein 7, Herrlingen 8, Eggingen-Mittelhart) of southern Germany have yielded ophidian assemblages consisting of Eoanilius oligocenicus, sp. nov. (Aniliidae), Bransateryx vireti, cf. “Tropidonotus” atavus, cf. Platyspondylia sp., four other unidentified boids (Boidae), and Texasophis bohemiacus (Colubridae). Most forms presumably were fossorial. Based on the caudal vertebrae, Bransateryx cannot be closely related with the extant Eryx and Charina. Texasophis is considered an oriental immigrant, while Eoanilius, cf. Platyspondylia, and perhaps Bransateryx represented an autochthonous European assemblage. Eoanilius, Boinae C, Bransateryx, and Texasophis survived in central Europe at least until the early Miocene.
Blair S Hedges - One of the best experts on this subject based on the ideXlab platform.
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origin of west indian populations of the geographically widespread boa corallus enydris inferred from mitochondrial dna sequences
Molecular Phylogenetics and Evolution, 1995Co-Authors: Robert W Henderson, Blair S HedgesAbstract:Abstract Corallus enydris (Serpentes: Boidae: Boinae) is an arboreal snake with an extremely wide mainland distribution from southern Costa Rica to southeastern Brazil and is one of two home species that has invaded the Lesser Antilles (Grenada Bank and St. Vincent). Mitochondrial DNA sequences of samples from seven geographically disparate localities provided evidence of phylogenetic relationships. The monophyly of C. enydris is corroborated and a major dichotomy between northern samples (Panama and Trinidad) and southern samples (Guyana, Peru, southeastern Brazil) was found and corresponds to the two currently recognized subspecies. Unexpectedly, the two samples from the West Indies (southern Lesser Antilles) cluster with the southern rather than the geographically closer northern samples (e.g., Trinidad). The results imply a fairly recent Guianan–Amazonian origin of West Indian populations.
Bastos, Leonora Tavares - One of the best experts on this subject based on the ideXlab platform.
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Ultra-estrutura de espermatozóide e filogenia de serpentes (Lepidosauria, Squamata)
2010Co-Authors: Bastos, Leonora TavaresAbstract:A filogenia de serpentes tem sido inferida a partir de dados morfológicos e moleculares, entretanto, não há consenso entre as relações filogenéticas de serpentes. Recentemente a ultra-estrutura de espermatozóide tem sido utilizada para as reconstruções filogenéticas, por conter significante informação filogenética. Além da análise filogenética, o mapeamento de caracteres permite inferir o curso da evolução de caracteres. A evolução da ultra-estrutura de espermatozóide na família Boidae foi investigada, sendo encontradas novas sinapomorfias (Serpentes, Pythonidae + Boidae, Boidae, Epicrates cenchria e Boa constrictor). Os resultados indicaram melhor concordância entre a ultra-estrutura de espermatozóide e a filogenia morfológica. Ademais, análises filogenéticas foram realizadas utilizando dados de ultra-estrutura de espermatozóide, osteológicos, e moleculares. As análises corroboraram a divisão basal entre Scolecophidia e Alethinophidia e a hipótese que sugere que o fóssil Dinilysia patagonica seja táxon irmão de Alethinophidia. Os dados de ultra-estrutura de espermatozóide contêm informação filogenética e podem fornecer caracteres adicionais para as reconstruções filogenéticas entre as serpentes, entretanto, ainda se faz necessário aumentar a cobertura taxonômica, o número de caracteres, além de estudos sobre espermiogênese. Os resultados sugerem que os dados da ultra-estrutura de espermatozóide são tão bons quanto qualquer outro caráter, devido principalmente ao fato de que revelaram novas sinapomorfias de Serpentes. Enfim, acredito que a integração de biologia comparada, história evolutiva, e combinação de caracteres possam ajudar no esclarecimento das relações de parentesco de serpentes. _______________________________________________________________________________ ABSTRACTThe snake relationships has been inferred from morphological and molecular data sets. However, there is no final conclusion about these relationships. The sperm ultrastructure has being used in phylogenetic analyses for a while, because it contains significant phylogenetic signal. Besides the phylogenetic analyses, mapping of characters permits inferences about the course of character evolution. We investigated the evolution of sperm ultrastructure among boids, and had found novel synapomorphies (Serpentes, Pythonidae + Boidae, Boidae, Epicrates cenchria e Boa constrictor). Our results indicate a better agreement between sperm ultrastructure and morphological phylogeny. In addition, we conducted a phylogenetic analyses based on sperm ultrastructural, osteological, and molecular characters. Our analyses corroborated the basal division of Scolecophidia and Alethinophidia, and hypothesis the support which the fossil Dinilysia patagonica is sister taxon of Alethinophidia. The sperm ultrastructure data contain phylogenetic information and may provide additional characters to phylogenetic analyses in snakes. However, it is still necessary to increase taxonomic sampling, number of characters, and spermiogenesis studies. Results suggest that sperm ultrastructure data are as good as any other character, due principally to the fact that they revealed novel synapomorphies of snakes. Finally, we conclude that the integration of comparative biology, evolution history, and combined analyses may provide insights into the snakes phylogenetic relationships
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Ultra-estrutura de espermatozóide e filogenia de serpentes (Lepidosauria, Squamata)
2007Co-Authors: Bastos, Leonora TavaresAbstract:Tese (doutorado)—Universidade de Brasília, Instituto de Ciências Biológicas, Programa de Pós-Graduação em Biologia Animal, 2007.A filogenia de serpentes tem sido inferida a partir de dados morfológicos e moleculares, entretanto, não há consenso entre as relações filogenéticas de serpentes. Recentemente a ultra-estrutura de espermatozóide tem sido utilizada para as reconstruções filogenéticas, por conter significante informação filogenética. Além da análise filogenética, o mapeamento de caracteres permite inferir o curso da evolução de caracteres. A evolução da ultra-estrutura de espermatozóide na família Boidae foi investigada, sendo encontradas novas sinapomorfias (Serpentes, Pythonidae + Boidae, Boidae, Epicrates cenchria e Boa constrictor). Os resultados indicaram melhor concordância entre a ultra-estrutura de espermatozóide e a filogenia morfológica. Ademais, análises filogenéticas foram realizadas utilizando dados de ultra-estrutura de espermatozóide, osteológicos, e moleculares. As análises corroboraram a divisão basal entre Scolecophidia e Alethinophidia e a hipótese que sugere que o fóssil Dinilysia patagonica seja táxon irmão de Alethinophidia. Os dados de ultra-estrutura de espermatozóide contêm informação filogenética e podem fornecer caracteres adicionais para as reconstruções filogenéticas entre as serpentes, entretanto, ainda se faz necessário aumentar a cobertura taxonômica, o número de caracteres, além de estudos sobre espermiogênese. Os resultados sugerem que os dados da ultra-estrutura de espermatozóide são tão bons quanto qualquer outro caráter, devido principalmente ao fato de que revelaram novas sinapomorfias de Serpentes. Enfim, acredito que a integração de biologia comparada, história evolutiva, e combinação de caracteres possam ajudar no esclarecimento das relações de parentesco de serpentes. _______________________________________________________________________________ ABSTRACTThe snake relationships has been inferred from morphological and molecular data sets. However, there is no final conclusion about these relationships. The sperm ultrastructure has being used in phylogenetic analyses for a while, because it contains significant phylogenetic signal. Besides the phylogenetic analyses, mapping of characters permits inferences about the course of character evolution. We investigated the evolution of sperm ultrastructure among boids, and had found novel synapomorphies (Serpentes, Pythonidae + Boidae, Boidae, Epicrates cenchria e Boa constrictor). Our results indicate a better agreement between sperm ultrastructure and morphological phylogeny. In addition, we conducted a phylogenetic analyses based on sperm ultrastructural, osteological, and molecular characters. Our analyses corroborated the basal division of Scolecophidia and Alethinophidia, and hypothesis the support which the fossil Dinilysia patagonica is sister taxon of Alethinophidia. The sperm ultrastructure data contain phylogenetic information and may provide additional characters to phylogenetic analyses in snakes. However, it is still necessary to increase taxonomic sampling, number of characters, and spermiogenesis studies. Results suggest that sperm ultrastructure data are as good as any other character, due principally to the fact that they revealed novel synapomorphies of snakes. Finally, we conclude that the integration of comparative biology, evolution history, and combined analyses may provide insights into the snakes phylogenetic relationships
Robert W Henderson - One of the best experts on this subject based on the ideXlab platform.
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origin of west indian populations of the geographically widespread boa corallus enydris inferred from mitochondrial dna sequences
Molecular Phylogenetics and Evolution, 1995Co-Authors: Robert W Henderson, Blair S HedgesAbstract:Abstract Corallus enydris (Serpentes: Boidae: Boinae) is an arboreal snake with an extremely wide mainland distribution from southern Costa Rica to southeastern Brazil and is one of two home species that has invaded the Lesser Antilles (Grenada Bank and St. Vincent). Mitochondrial DNA sequences of samples from seven geographically disparate localities provided evidence of phylogenetic relationships. The monophyly of C. enydris is corroborated and a major dichotomy between northern samples (Panama and Trinidad) and southern samples (Guyana, Peru, southeastern Brazil) was found and corresponds to the two currently recognized subspecies. Unexpectedly, the two samples from the West Indies (southern Lesser Antilles) cluster with the southern rather than the geographically closer northern samples (e.g., Trinidad). The results imply a fairly recent Guianan–Amazonian origin of West Indian populations.
Martin Ivanov - One of the best experts on this subject based on the ideXlab platform.
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Early Miocene snakes from the locality of Wintershof-West (Germany)
2018Co-Authors: Václav Paclík, Martin Ivanov, Àngel H. LujánAbstract:The late early Miocene snake assemblages are well-documented from Central European localities of the MN 4 and MN 5 Zones. However, diversified snake fauna is still poorly know from MN 1 to MN 3 Zones. German Wintershof-West locality (MN3b) provided both abundant fauna with a relatively diversified snake assemblage including Boidae: Bavarioboa sp., Bavarioboa sp. 1 (probably new species), Falseryx petersbuchi, Boidae gen. et sp. indet.; Colubridae: Coluber hungaricus, Coluber aff. hungaricus, Colubrinae gen. et sp. indet., „Neonatrix“ aff. europea, „Neonatrix“ sp.; Elapidae: Micrurus gallicus, Micrurus sp. and Viperidae: Vipera sp. (V. aspis complex). Although Boidae still represent an important group within the assemblage, the colubroid snakes, mostly of Asiatic origin, are dominant which coincides with recent studies from Amoneburg, Germany, MN 2. Several snake taxa from Wintershof-West display their first distinct appearance (C. hungaricus, Micrurus gallicus, and the genus Neonatrix). The occurrence of unusually large specimens of vipers referred to the V. aspis complex (centrum length of the largest vertebrae 5.24–6.21 mm) is remarkable. The snake assemblage composition documents that the late MN 3 climate was favorable for distribution of rather thermophilous taxa (Bavarioboa, Falseryx) in southern Germany. Therefore, we can assume a relatively rapid increase in temperatures in western part of Central Europe during the early Burdigalian stage.
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Snakes from Griesbeckerzell (Langhian, Early Badenian), North Alpine Foreland Basin (Germany), with comments on the evolution of snake faunas in Central Europe during the Miocene Climatic Optimum
Geodiversitas, 2011Co-Authors: Martin Ivanov, Madelaine BöhmeAbstract:ABSTRACT Two fossil-bearing levels at Griesbeckerzell (the central part of the North Alpine Foreland Basin; Early Badenian, Mittlere Serie of the Upper Freshwater Molasse) have produced a rich reptile fauna that includes a large number of snakes, i.e. Grisbeckerzell lb (OSM E, 15.0–14.9 Ma): Boidae: Python sp.; Colubridae: “Coluber” cf. caspioides; Vipendae: Vipera sp. (“oriental vipers” group) or Daboia sp.; Griesbeckerzell la (beginning of unit OSM F, 14.77 Ma): Boidae: Bavarioboa aff. hermi, cf. Bavarioboa sp., Python sp.; Colubridae: “Coluber” cf. caspioides, Coluber hungaricus, “Coluber” sp., Texasophis cf. meint, Natrix sp.; Elapidae: Micrurus cf. gallicus; Viperidae: Vipera sp. (“Oriental vipers” group), Vipera sp. (“European vipers” group; “Vipera aspis complex”). The Miocene Climatic Optimum (MCO) is documented in central Europe by the presence of highly thermophilous reptile taxa, including Python sp., which is the most thermophilous reptile known from the European Neogene. The presence of Pytho...
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Fossil snake assemblages from the French Middle Miocenelocalities at La Grive (France)
2002Co-Authors: Martin IvanovAbstract:Material from two classical fissures have recently been investigated - La Grive L7 and La Grive M. Both localities represent the unique European palaeoherpetological Middle Miocene (MN 7+8) sites. Localities show somewhat different fossilisation each other and also different snake diversity including Typhlopidae, Boidae, Colubridae, Elapidae, and Viperidae. Snake assemblages at La Grive L7 and La Grive M show a rapid evolution of colubrid snakes in Europe as results from the comparison with some other Miocene ophidian localities in Europe (Sansan, MN 6, Devinska Nova Ves, MN 6, Gritsev, MN 9a, Kohfidisch, MN 11).
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Snakes of the lower/middle Miocene transition at Vieux Collonges (Rhône, France), with comments on the colonisation of western Europe by colubroids
Geodiversitas, 2000Co-Authors: Martin IvanovAbstract:The snake assemblage of the Lower / Middle Miocene (MN 4/5) site Vieux Collonges (France) includes Boidae (Python sp., Eryx sp., Boidae B & C), Colubridae (Texasophis sp., Neonatrix cf. europaea, Natrix aff. sansaniensis, Natricinae A, B, C, & D), Elapidae (Micrurus aff. gallicus, Naja cf. romani, Naja sp. 1, Elapidae A & B), and Viperidae [Viperinae A, Vipera (Oriental vipers) or Daboia]. The Boidae represent an ancient component of the snake fauna. Although the representatives of the family Boidae were still common in West Europe at the Lower / Middle Miocene transition (Vieux Collonges), the representatives of the Colubridae were predominant in Central Europe already during the Lower Miocene. It may be possible that the first Colubridae have immigrated into the Central European areas across the Mazury-Mazowsze continental bridge (Poland) in the Lower Oligocene and then penetrated into West Europe across the Rhine Graben in several waves of dispersal. The small representatives of family Elapidae appeared in Europe most probably slightly earlier (MN 3a) than the large representatives of the genus Naja. The oldest European viperids are typical small vipers, the large Oriental vipers appeared later (MN 3) in Europe.
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The snake fauna of Devínska Nová Ves (Slovak Republic) inrelation of the evolution of snake assemblages of the EuropeanMiddle Miocene
1998Co-Authors: Martin IvanovAbstract:The reptile assemblage of Devinska Nova Ves (Astaracian - MN 6) is diversified, including Colubridae, Elapidae and Viperidae. Recently, the following snake taxa were described from this site: Colubrinae B & D, Colubrinae gen. et sp. indet., Neonatrix sp. and Elapidae C. All the taxa (Colubridae and Elapidae) represent the modern European snake fauna which displaced 'ancient' snake fauna (including family Boidae) out of the Central European area. The last Central European occurrence of large boid snakes (Boinae + Pythoninae) is documented at the Lower / Middle Miocene transition, while 'Oriental vipers' group occurs here till the end of Middle Miocene. Representatives of cobras (Elapidae) became extinct during the Upper Miocene in Central Europe.