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Palaeontologia Electronica, 27(2):a26 Priya Agnihotri, Hukam Singh, Kumarapuram A. Subramanian, Jagannadh Vishwanathan & Ashok Sahni.- A new genus and species of fossil pseudoscorpion (Arachnida: Pseudoscorpiones) from the Eocene amber of Western India.- A new genus and species of fossil pseudoscorpion, Geogaranya valiyaensis gen. nov. sp. nov., is described from the Valia Lignite Mine, Cambay Basin, Gujarat. The new fossil taxon is exceptionally preserved in the early Eocene Cambay amber and is a member of the family Geogarypidae, with similar affinities to the modern genus Geogarypus (Chamberlin, 1930) recorded from Sri Lanka, India and New Guinea. The taxon is one of the smallest known adult fossils of pseudoscorpion in amber from the Cambay Basin and adds to the bark-dwelling arthropod biodiversity identified in the Eocene amber from Western India. Carnets Geol., Article, vol. 24, no. 07 Bruno R.C. Granier.- Octahedronoides tethysianus n.gen., n.sp., enigmatic clusters of microspheres at the Jurassic-Cretaceous transition.- In the literature, numerous accounts exist of microspheres scattered in the pelagic environments of the Tethys realm at the Jurassic-Cretaceous transition. These microspheres are commonly associated with genera such as Cadosina, Colomisphaera, or Stomiosphaera, and attributed to calcareous dinocysts. On the other hand, there are few records of the microsphere, initially described as Cadosina minuta Borza, 1980, which are arranged in small clusters, likely comprising six cells. This distinctive grouping and its architecture preclude attribution to the calcareous dinocysts. A new genus and a new species (as Octahedronoides tethysianus n.gen., n.sp.) are introduced to define these clusters of leiospheres, which are here reascribed to the acritarchs. Carnets Geol., Article, vol. 24, no. 06 Dany Azar, Sibelle Maksoud, Di-Ying Huang, Mounir Maalouf & Chen-Yang Cai.- A new fossil psychodomorphan fly from Lower Barremian Lebanese amber elucidates the relationship of the Tanyderinae stat. nov. within the Psychodidae.- A new species, Nannotanyderus granieri sp. nov., belonging to the Tanyderidae (Diptera, Nematocera), from Lower Barremian amber of Bqaatouta (Lebanon), is characterized, described, figured, and its taxononomic position discussed. The possible confusion regarding the attribution of new fossils to either the Tanyderidae or the Psychodidae, in addition to the results of recent molecular phylogenies, have led us to re-evaluate the taxonomic position of the Tanyderidae and to consider it as a subfamily within the Psychodidae. The fossil described herein is a tiny tanyderine sensu nov. species, and the second one belonging to the genus Nannotanyderus from Lebanese amber. A tentative molecular phylogeny of recent Psychodidae and an exhaustive catalogue of fossil Tanyderinae stat. nov. are provided. Acta Palaeontologica Romaniae, Vol. 20 (2): 11-15 Felix Schlagintweit.- Challenges in orbitolinid identification and biostratigraphic consequences: an Aptian example.- The much-cited importance of Orbitolinidae in biostratigraphy depends on the species and time-interval under consideration. In any case, correct species identification is of primary importance as the basis for drawing conclusions. This task is best achieved in an assemblage where centered sections (axial and transverse) showing all details of the complex megalospheric embryo are available. Difficulties in the correct interpretation of oblique sections is exemplified by an example from the Aptian of Turkey, respectively Praeorbitolina versus Mesorbitolina. Resulting differences in species determination not only has an impact on age interpretation, but also associated geologic-tectonic conclusions, as well as basic taxonomic data (e.g., stratigraphic ranges, statistics on stage diversities). |
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