Ontogeny of Ancyrodelloides carlsi (Boersma) and comments on its generic attribution (Conodonta,Lower Devonian) |
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| Affiliation: | 1. Dipartimento di Scienze Chimiche e Geologiche, Università di Cagliari, Cittadella Universitaria (Blocco A), SS.554 bivio per Sestu 09042 Monserrato (CA), Italy;2. Dipartimento di Matematica e Geoscienze, Università di Trieste, via Weiss 2 34128 Trieste, Italy;1. Instituto de Ciências da Terra, Departamento de Geociências, Escola de Ciências e Tecnologia, Universidade de Évora, Colégio Luís António Verney, 7000-671 Évora, Portugal;2. Departamento de Geodinámica, Facultad de Ciencias, Universidad de Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain;1. Institute of Earth Sciences, University of Lausanne, Lausanne, CH-1015, Switzerland;2. Department of Earth Sciences, University of Oregon, Eugene, OR, 97403, USA;3. Department of Geosciences, University of Arizona, Tucson, AZ, 85721, USA;1. Department of Geology, Faculty of Sciences, University of Isfahan, Isfahan, Iran;2. Senckenberg – Research Institute and Natural History Museum, Senckenberganlage 25, 60325 Frankfurt am Main, Germany;3. State Museum of Natural History Stuttgart, Rosenstein 1, 70191 Stuttgart, Germany;1. Department of Paleontology, Eötvös University, Budapest, Hungary;2. Department of Paleontology and Geology, Hungarian Natural History Museum, Budapest, Hungary;1. University of Geneva, Department of Earth Sciences, Rue des Maraîchers 13, 1205 Geneva, Switzerland;2. Université de Lorraine, CNRS, lab. GeoRessources, UMR 7359, BP 70239, 54506 Vandoeuvre-lès-Nancy Cedex, France;3. University of Bucharest, Faculty of Geology and Geophysics, Department of Geology and Paleontology, 1, N. Balcescu Ave., 010041 Bucharest, Romania;4. Université de Bourgogne Franche-Comté, UMR CNRS 6282 Biogéosciences, 6 bd. Gabriel, 21000 Dijon, France;5. The University of Texas at Austin, Department of Geological Sciences, 2275 Speedway Stop C9000, 78712 Austin, TX, USA;6. Direction de la Géologie, Ministère de l’Energie, des Mines et du Développement Durable - Département de l’Energie et des Mines, Rue Abou Marouane Essaadi, BP 6208, Haut Agdal – Rabat, Morocco |
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| Abstract: | The ontogeny of the Lochkovian conodont species Ancyrodelloides carlsi (Boersma) is demonstrated thanks to a rich population from Morocco. The studied sample includes elements at various growth stages from juvenile to gerontic. The data are confirmed by several elements in collections from several localities in the Carnic Alps (Italy and Austria). The absence of terraces at every stage of growth and the presence of a strong denticulated lateral process confirms the generic attribution of the species to genus Ancyrodelloides. Comments on the apparatus are provided. The geographical distribution of the species, limited to Europe and the Mediterranean region, challenges its stratigraphic value for long distance correlations. |
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| Keywords: | Taxonomy Phylogeny Conodonts Lochkovian |
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