A new crustacean from the Herefordshire (Silurian) Lagerstätte, UK, and its significance in malacostracan evolution
| Autor: | Derek J. Siveter, David J. Siveter, Mark D. Sutton, Derek E. G. Briggs, David A. Legg |
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| Přispěvatelé: | Natural Environment Research Council (NERC) |
| Rok vydání: | 2017 |
| Předmět: |
Life Sciences & Biomedicine - Other Topics
0106 biological sciences 0301 basic medicine Leptostraca FOSSIL-LAGERSTATTE Phyllocarida EPIPODITES 01 natural sciences Crustacea Malacostraca Herefordshire Lagerstätte 11 Medical and Health Sciences General Environmental Science Ecology biology Fossils General Medicine GILLS Palaeobiology Herefordshire Lagerstatte General Agricultural and Biological Sciences Life Sciences & Biomedicine Silurian HOX GENES Research Article PHYLOGENY Environmental Sciences & Ecology Lagerstätte 010603 evolutionary biology General Biochemistry Genetics and Molecular Biology 03 medical and health sciences Paleontology stomatognathic system 07 Agricultural and Veterinary Sciences Animals Biology ARTHROPOD Evolutionary Biology Science & Technology General Immunology and Microbiology 06 Biological Sciences biology.organism_classification Crustacean United Kingdom 030104 developmental biology MORPHOLOGY Arthropod Head |
| Zdroj: | Proceedings of the Royal Society B: Biological Sciences |
| ISSN: | 1471-2954 0962-8452 |
| Popis: | Cascolus ravitisgen. et sp. nov. is a three-dimensionally preserved fossil crustacean with soft parts from the Herefordshire (Silurian) Lagerstätte, UK. It is characterized by a head with a head shield and five limb pairs, and a thorax (pereon) with nine appendage-bearing segments followed by an apodous abdomen (pleon). All the appendages except the first are biramous and have a gnathobase. The post-mandibular appendages are similar one to another, and bear petal-shaped epipods that probably functioned as a part of the respiratory–circulatory system. Cladistic analysis resolves the new taxon as a stem-group leptostracan (Malacostraca). This well-preserved arthropod provides novel insights into the evolution of appendage morphology, tagmosis and the possible respiratory–circulatory physiology of a basal malacostracan. |
| Databáze: | OpenAIRE |
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