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The discovery of a new Fusitriton (Gastropoda, Cymatiidae) from deep waters of Tristan Da Cunha (southern Atlantic)
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RBINS Staff Publications 2019
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The distinction of isolated bones from plaice (Pleuronectes platessa), flounder (Platichthys flesus) and dab (Limanda limanda): a description of the diagnostic characters
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The osteology of 38 skeletal elements is investigated in plaice, dextral and sinistral flounder, and dab with the aim of defining diagnostic characters that allow species identification of isolated bones from archaeological excavations. Five of these 38 skeletal elements have been mentioned in the literature as being diagnostic, but they appear to be unreliable for identification. All other elements allow identification, although only 23 permit the recognition of all three species. The individual bone elements and their diagnostic criteria are depicted and described in detail. Attention is paid to individual variation, and, when relevant, size-related morphological changes are also described. The keys that are developed for the various elements are finally tested on a large flatfish bone assemblage from an archaeological site. On the basis of these results, the success rate of the identifications for the various bones is discussed. Possible strategies for identification work on this group are suggested that take into account the extent of the reference collection, the time spent on the identifications and the experience needed in comparative osteology of these flatfish.
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The distribution of the non-araeneae and non-acari arachnids of Galapagos
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The Diversity of Fish Otoliths, Past and Present by Dirk NOLF.
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"The Diversity of Fish Otoliths Past and Present" (222 p. and 359 pl.) by Dirk NOLF is a monograph in natural sciences from the Operational Directorate “Earth and History of Life” of the Royal Belgian Institute of Natural Sciences (www.naturalsciences.be/institute/structure/index_ html#earth). It contains a historical and nomenclatural overview of otolith research in paleontology, with special emphasis on their great impact on the evaluation of the fossil record of teleostean fishes, and a systematic overview (with iconography) of the 1391 fossil species considered to be valid and of all Recent species for which otoliths have been found as fossil. For every species, the stratigraphic and geographic origin of the type material is given, and where available, also the collection numbers and depository of the holotype. Fossil species based on skeletons with otoliths in situ, but which do not have exclusively otolith-based primary types, are also included. An alphabetic list of all the 1797 nominal otolith-based fossil fish species, with an evaluation of their validity and their updated nomenclature is provided.
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RBINS Staff Publications
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The Diversity of Fish Otoliths, Past and Present
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The Diversity of Fish Otoliths, Past and Present (Dirk NOLF)is a publication from the Operational Directorate “Earth and History of Life” of the Royal Belgian Institute of Natural Sciences (www.naturalsciences.be). This new book (222 p. & 359 pl.) contains a historical and nomenclatural overview of otolith research in paleontology, with special emphasis on their great impact on the evaluation of the fossil record of teleostean fishes, and a systematic overview (with iconography) of the 1391 fossil species considered to be valid and of all Recent species for which otoliths have been found as fossil. Otoliths of nearly all recent families and subfamilies are illustrated by at least one example, covering about 95% of all known extant taxa. For every fossil species, the stratigraphic and geographic origin of the type material is given, and where available, also the collection numbers and depository of the holotype. Fossil species based on skeletons with otoliths in situ, but which do not have exclusively otolith-based primary types, are also included. An alphabetic list of all the 1797 nominal otolith-based fossil fish species, with an evaluation of their validity and their actualized nomenclature is provided.
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RBINS Staff Publications
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The Dormaal Sands and the Palaeocene/Eocene boundary in Belgium
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The Dormaal Sands and the Paleocene/Eocene boundary in Belgium.
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The Earliest Bats from Europe
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Chiroptera is one of the few modern mammal orders for which no fossil record has been associated with the Paleocene-Eocene Thermal Maximum that happened 55.8 million years ago. With the exception of complete skeletons from the early Middle Eocene of the Messel Formation in Germany and the late Early Eocene Green River Formation in Wyoming, all early bats are only represented by isolated elements, mainly teeth and fragmentary jaws, making the diversity and taxonomic affinities more difficult to establish. Here we revise all of the Early Eocene bats from Europe based on dental features, including digitally reconstructed teeth using micro-CT scanning technology of some complete skeletons. The diversity of European early bats is composed of the families Onychonycteridae, Icaronycteridae, Archaeonycteridae, Palaeochiropterygidae, and some of undetermined affinities. Dental features and synapomorphies of each family are characterized for the first time. The earliest bats are dated from the early Early Eocene and are all of small size with lower molars less than 1.3 mm in length. They are represented by: Eppsinycteris anglica from Abbey Wood, east London, England, an onychonycterid with reduced lower p4 and long molars; Archaeonycteris? praecursor from Silveirinha, Portugal, an archaeonycterid with long postcristid on wide lower molars; a new archaeonycterid genus and species from Meudon, North France with long trigonid and shorter postcristid on wide lower molars. These results indicate that the diversity of European Early Eocene bats is higher than previously recognized and that diversification began early in the Early Eocene.
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The earliest Eocene mammal fauna of the Erquelinnes Sand Member near the French-Belgian border
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The earliest Eocene Erquelinnes site was discovered in 1880, but its mammal fauna has been frequently ignored. This paper provides the first detailed overview of the Erquelinnes mammals since 1929. The new faunal list doubles the known diversity at Erquelinnes to a total of 16 species, now also including amphilemurids, hyaenodontids, mesonychids, louisinids, equids and diacodexeids. The majority of the Erquelinnes species is also present in the earliest Eocene Dormaal MP7 reference fauna, with as most notable exceptions the presence of a potentially dwarfed specimen of Dissacus, and of two perissodactyl taxa at Erquelinnes. The ceratomorph perissodactyl Cymbalophus cuniculus is also known from the earliest Eocene of England, but a specimen identified as cf. Sifrhippus sandrae is closely similar to contemporaneous primitive North American equids. This specimen represents the oldest unambiguous European equid and highlights faunal similarities between Europe and North America during this time interval. Faunal differences between Erquelinnes and Dormaal seem mostly due to depositional differences, and the Erquelinnes fauna represents a typical earliest Eocene fauna, closely similar to other MP7 and PEI faunas in Europe.
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The Ecology and Feeding Habits of the Arboreal Trap-Jawed Ant Daceton armigerum
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