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  • Articles  (38)
  • 2010-2014  (38)
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  • Articles  (38)
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  • 1
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    A new species of Lacinius in amber (Arachnida: Opiliones) (2014)
    Copernicus
    Details
    Publication Date: 2014-12-03
    Description: A new species of Lacinius in amber (Arachnida: Opiliones) Fossil Record, 18, 37-42, 2015 Author(s): P. G. Mitov, J. A. Dunlop, and D. Penney A new specimen of Lacinius Thorell, 1876; (Opiliones: Phalangiidae) from Eocene Baltic amber is described. We interpret it as conspecific with a slightly younger record from the German Bitterfeld amber, originally referred to as the extant species L. erinaceus Staręga, 1966. Our new specimen reveals pedipalpal apophyses on both the patella and the tibia, features which we can now confirm in the Bitterfeld fossil too. This unique character combination for the genus justifies a new, extinct species: Lacinius bizleyi sp. nov. The Baltic amber inclusion dates to ca. 44–49 Ma, and is thus the oldest putative example of Lacinius in the fossil record. It is a further example of an arachnid species shared between Baltic and Bitterfeld amber.
    Print ISSN: 2193-0066
    Electronic ISSN: 2193-0074
    Topics: Geosciences
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  • 2
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    A new species of Lacinius in amber (Arachnida: Opiliones) (2014)
    Copernicus
    Details
    Publication Date: 2014-12-02
    Description: A new specimen of Lacinius Thorell, 1876; (Opiliones: Phalangiidae) from Eocene Baltic amber is described. We interpret it as conspecific with a slightly younger record from the German Bitterfeld amber, originally referred to as the extant species L. erinaceus Staręga, 1966. Our new specimen reveals pedipalpal apophyses on both the patella and the tibia, features which we can now confirm in the Bitterfeld fossil too. This unique character combination for the genus justifies a new, extinct species: Lacinius bizleyi sp. nov. The Baltic amber inclusion dates to ca. 44–49 Ma, and is thus the oldest putative example of Lacinius in the fossil record. It is a further example of an arachnid species shared between Baltic and Bitterfeld amber.
    Print ISSN: 2193-0066
    Electronic ISSN: 2193-0074
    Topics: Geosciences
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  • 3
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    First record of the genus Baris Germar, 1817 (Coleoptera: Curculionidae), in Dominican amber (2014)
    Copernicus
    Details
    Publication Date: 2014-10-21
    Description: First record of the genus Baris Germar, 1817 (Coleoptera: Curculionidae), in Dominican amber Fossil Record, 18, 31-35, 2015 Author(s): G. Poinar Jr. and A. A. Legalov A new weevil species – Baris grossacavis Poinar and Legalov, sp. nov. (Coleoptera: Curculionidae) – is described from Dominican amber. The new species is close to Baris rubripes Casey, 1892, but differs by possessing large punctures over much of its body, including the pronotum; elytral intervals with rows of narrow scales, and narrow elytral intervals. The fossil is the first record of the subfamily Baridinae from any amber source and the first record from the Miocene.
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    Topics: Geosciences
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  • 4
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    First record of the genus Baris Germar, 1817 (Coleoptera: Curculionidae), in Dominican amber (2014)
    Copernicus
    Details
    Publication Date: 2014-10-20
    Description: A new weevil species – Baris grossacavis Poinar and Legalov, sp. nov. (Coleoptera: Curculionidae) – is described from Dominican amber. The new species is close to Baris rubripes Casey, 1892, but differs by possessing large punctures over much of its body, including the pronotum; elytral intervals with rows of narrow scales, and narrow elytral intervals. The fossil is the first record of the subfamily Baridinae from any amber source and the first record from the Miocene.
    Print ISSN: 2193-0066
    Electronic ISSN: 2193-0074
    Topics: Geosciences
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  • 5
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    New information on the cranial and postcranial anatomy of the early synapsid Ianthodon schultzei (Sphenacomorpha: Sphenacodontia), and its evolutionary significance (2014)
    Copernicus
    Details
    Publication Date: 2014-10-07
    Description: New information on the cranial and postcranial anatomy of the early synapsid Ianthodon schultzei (Sphenacomorpha: Sphenacodontia), and its evolutionary significance Fossil Record, 18, 17-30, 2015 Author(s): F. Spindler, D. Scott, and R. R. Reisz Newly identified material belonging to the holotype specimen of Ianthodon schultzei substantially increases our knowledge of this poorly known basal sphenacodont synapsid from the fossil site in Garnett, Kansas (Missourian, Late Pennsylvanian). The original description, based on a partial dermal skull roof, is augmented with information on the palate and braincase, together with data on the mandible and a few postcranial elements. The known skeletal morphology resembles that of Haptodus garnettensis , another synapsid taxon known from this locality, but with fewer marginal, distinctly recurved teeth and smaller teeth on the transverse flange of the pterygoid. Although recognizing that the holotype and only known specimen represents a juvenile individual, Ianthodon appears to reflect a more basal sphenacodontian condition than H. garnettensis . A restricted phylogenetic analysis based on previous work and newly scored characters for Ianthodon , Cutleria and Pantelosaurus supports this hypothesis. The Garnett locality appears to preserve an assemblage of synapsids ( Haptodus, Ianthasaurus, Ianthodon ) that are close to the base of the large clade that includes Edaphosauridae and Sphenacodontia, suggesting that an initial diversification of this clade occurred well within the Carboniferous Period.
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    Electronic ISSN: 2193-0074
    Topics: Geosciences
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  • 6
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    The rarity of gastroliths in sauropod dinosaurs – a case study in the Late Jurassic Morrison Formation, western USA (2014)
    Copernicus
    Details
    Publication Date: 2014-10-07
    Description: The rarity of gastroliths in sauropod dinosaurs – a case study in the Late Jurassic Morrison Formation, western USA Fossil Record, 18, 1-16, 2015 Author(s): O. Wings Occurrences of suspected sauropod geo-gastroliths and "exoliths" (exotic clasts) are compared with authentic finds of stomach stones in the sauropods Diplodocus , Cedarosaurus , and Camarasaurus . Sedimentological and taphonomical evidence from classic sauropod dinosaur localities in the Late Jurassic Morrison Formation (Cleveland-Lloyd Dinosaur Quarry, Dry Mesa Dinosaur Quarry, Carnegie Quarry/Dinosaur National Monument, Howe Quarry, Como Bluff, and Bone Cabin Quarry) reveals very few sauropod finds with unambiguous gastroliths. The scarcity of clasts in the fine-grained sediments of most of the localities suggests that only a small number of sauropods possessed gastroliths. The occurrence of a hypothetical avian-style gastric mill in sauropods is not supported by taphonomical evidence. Exoliths that are abundant in the Early Cretaceous of the western USA are nearly absent in Late Jurassic sediments. Without an association with fossil bone, there is no convincing evidence that such clasts represent former gastroliths. It is more plausible that most exoliths have been transported in hyperclastic flows or that surface-collected stones are weathering relicts of former conglomerate layers.
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    Topics: Geosciences
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  • 7
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    The rarity of gastroliths in sauropod dinosaurs – a case study in the Late Jurassic Morrison Formation, western USA (2014)
    Copernicus
    Details
    Publication Date: 2014-10-06
    Description: Occurrences of suspected sauropod geo-gastroliths and "exoliths" (exotic clasts) are compared with authentic finds of stomach stones in the sauropods Diplodocus, Cedarosaurus, and Camarasaurus. Sedimentological and taphonomical evidence from classic sauropod dinosaur localities in the Late Jurassic Morrison Formation (Cleveland-Lloyd Dinosaur Quarry, Dry Mesa Dinosaur Quarry, Carnegie Quarry/Dinosaur National Monument, Howe Quarry, Como Bluff, and Bone Cabin Quarry) reveals very few sauropod finds with unambiguous gastroliths. The scarcity of clasts in the fine-grained sediments of most of the localities suggests that only a small number of sauropods possessed gastroliths. The occurrence of a hypothetical avian-style gastric mill in sauropods is not supported by taphonomical evidence. Exoliths that are abundant in the Early Cretaceous of the western USA are nearly absent in Late Jurassic sediments. Without an association with fossil bone, there is no convincing evidence that such clasts represent former gastroliths. It is more plausible that most exoliths have been transported in hyperclastic flows or that surface-collected stones are weathering relicts of former conglomerate layers.
    Print ISSN: 2193-0066
    Electronic ISSN: 2193-0074
    Topics: Geosciences
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  • 8
    facet.materialart.
    Unknown
    New information on the cranial and postcranial anatomy of the early synapsid Ianthodon schultzei (Sphenacomorpha: Sphenacodontia), and its evolutionary significance (2014)
    Copernicus
    Details
    Publication Date: 2014-10-06
    Description: Newly identified material belonging to the holotype specimen of Ianthodon schultzei substantially increases our knowledge of this poorly known basal sphenacodont synapsid from the fossil site in Garnett, Kansas (Missourian, Late Pennsylvanian). The original description, based on a partial dermal skull roof, is augmented with information on the palate and braincase, together with data on the mandible and a few postcranial elements. The known skeletal morphology resembles that of Haptodus garnettensis, another synapsid taxon known from this locality, but with fewer marginal, distinctly recurved teeth and smaller teeth on the transverse flange of the pterygoid. Although recognizing that the holotype and only known specimen represents a juvenile individual, Ianthodon appears to reflect a more basal sphenacodontian condition than H. garnettensis. A restricted phylogenetic analysis based on previous work and newly scored characters for Ianthodon, Cutleria and Pantelosaurus supports this hypothesis. The Garnett locality appears to preserve an assemblage of synapsids (Haptodus, Ianthasaurus, Ianthodon) that are close to the base of the large clade that includes Edaphosauridae and Sphenacodontia, suggesting that an initial diversification of this clade occurred well within the Carboniferous Period.
    Print ISSN: 2193-0066
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    Topics: Geosciences
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  • 9
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    The stratigraphic importance of the brontothere (cf. Diplacodon elatus ) in the Brennan Basin Member of the Duchesne River Formation of Utah (2014)
    Copernicus
    Details
    Publication Date: 2014-08-28
    Description: The stratigraphic importance of the brontothere (cf. Diplacodon elatus ) in the Brennan Basin Member of the Duchesne River Formation of Utah Fossil Record, 17, 69-74, 2014 Author(s): B. J. Burger and L. Tackett II We report on the first occurrence of an early horned brontothere in the Brennan Basin Member of the Duchesne River Formation in northeastern Utah. This is the first record of a brontothere from the Brennan Basin Member. Previously, brontotheres have been reported from the higher stratigraphic La Point Member ( Duchesneodus uintensis ) and the lower stratigraphic Uinta Formation ( Sphenocoelus uintensis, Fossendorhinus diploconus, Metarhinus fluviatilis, Metarhinus abbotti, Sthenodectes incisivum, Metatelmatherium ultimum, Protitanotherium emarginatum, Pollyosbornia altidens, Diplacodon elatus ). The recovered specimen consists of an upper third molar, which is comparable to the species Diplacodon elatus . The specimen supports the continued presence of brontotheres throughout the deposition of the Duchesne River Formation across the late Uintan to early Duchesnean North American Land Mammal Age. The previous lack of brontotheres within the lower beds of the Duchesne River Formation is likely a result of poor sampling and the relative rarity of fossils from this unit.
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    Topics: Geosciences
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  • 10
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    The stratigraphic importance of the brontothere (cf. Diplacodon elatus) in the Brennan Basin Member of the Duchesne River Formation of Utah (2014)
    Copernicus
    Details
    Publication Date: 2014-08-27
    Description: We report on the first occurrence of an early horned brontothere in the Brennan Basin Member of the Duchesne River Formation in northeastern Utah. This is the first record of a brontothere from the Brennan Basin Member. Previously, brontotheres have been reported from the higher stratigraphic La Point Member (Duchesneodus uintensis) and the lower stratigraphic Uinta Formation (Sphenocoelus uintensis, Fossendorhinus diploconus, Metarhinus fluviatilis, Metarhinus abbotti, Sthenodectes incisivum, Metatelmatherium ultimum, Protitanotherium emarginatum, Pollyosbornia altidens, Diplacodon elatus). The recovered specimen consists of an upper third molar, which is comparable to the species Diplacodon elatus. The specimen supports the continued presence of brontotheres throughout the deposition of the Duchesne River Formation across the late Uintan to early Duchesnean North American Land Mammal Age. The previous lack of brontotheres within the lower beds of the Duchesne River Formation is likely a result of poor sampling and the relative rarity of fossils from this unit.
    Print ISSN: 2193-0066
    Electronic ISSN: 2193-0074
    Topics: Geosciences
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