An intertidal balanomorph Hexaminius venerai sp. nov. (Austrobalanidae) colonizing a log of Podocarpoxylon from the La Meseta Formation (Eocene), Seymour Island,Antarctica: a glimpse of Antarctic antiquity |
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| Authors: | Tomá? Ko?í Radek Vodrá?ka Martina Ko?ová Veselská John Buckeridge |
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| Institution: | 1. Palaeontological Department, Natural History Museum, National Museum, Prague, Czech Republicprotula@seznam.cz;3. Czech Geology Survey, Prague, Czech Republic;4. Faculty of Science, Institute of Geology and Palaeontology, Charles University, Prague, Czech Republic;5. Department of Paleobiology and Paleoecology, Institute of Geology of the Czech Academy of Sciences, Lysolaje, Czech Republic;6. Earth and Oceanic Systems Group, RMIT University, Melbourne, Australia |
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| Abstract: | AbstractThe sessile barnacle Hexaminius venerai sp. nov. (Tetraclitoidea: Austrobalanidae) is described from the middle Eocene La Meseta Formation of Seymour Island, Antarctic Peninsula. Hexaminius venerai sp. nov. is the earliest known record of the genus in the Antarctic, the first occurrence of Hexaminius from outside Australian waters and the first record of a fossil cirripede attached to the substrate from the Antarctic. Exceptional preservation of more than 200 specimens, some of which retain opercula within the shell, is discussed. In life, the cirripedes were attached to a tree trunk tentatively identified as Podocarpoxylon, a South Hemisphere conifer. Hexaminius venerai sp. nov. is a survivor of an early phase in balanid radiation, prior to the development of strong radially-interlocked parietes.https://zoobank.org/urn:lsid:zoobank.org:pub:EAA2EB5C-BC57-41FA-93A0-046AF5FD59EB |
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| Keywords: | Eocene La Meseta Formation Seymour Island Antarctica barnacles Hexaminius venerai sp nov Podocarpoxylon |
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