Show simple item record Anna en_US Denis E. B. en_US 2011-05-31T12:15:47Z 2011-05-31T12:15:47Z 2008-02 en_US
dc.identifier.citation Kozlowska , A & Bates , D E B 2008 , ' Kirkigraptus, a new retiolitid graptolite from Poland ' Acta Palaeontologica Polonica , vol 53 , no. 1 , pp. 105-110 . en_US
dc.identifier.other PURE: 162445 en_US
dc.identifier.other dspace: 2160/6827 en_US
dc.description.abstract The new retiolitid graptolite Kirkigraptus inexpectans gen. et sp. nov., from the Neodiversograptus nilssoni Biozone of the Bartoszyce borehole, Poland is described. It is unique among the retiolitids not having a preserved virgella or ancora. Instead the most proximal structures are two round proxi-lateral lists, joining the two genicular lists of the first thecae, connecting the two sides of the rhabdosome. The lists are interpreted as a possible homologue of the distal edge of the ancora umbrella in typical retiolitids. The size of rhabdosome with large proximal lateral orifices, and the ventral panels of thecae with mid-ventral lists, are similar to those of Plectograptus, whereas the two ancora sleeve panels consisting of spaced horizontal lists only, resemble those of Valentinagraptus. It is possible that the new retiolitid may represent a new pattern of development of the proximal end of the rhabdosome, different from that in all other retiolitids. en_US
dc.format.extent 6 en_US
dc.relation.ispartof Acta Palaeontologica Polonica en_US
dc.title Kirkigraptus, a new retiolitid graptolite from Poland en_US
dc.contributor.pbl Aberystwyth University en_US
dc.contributor.pbl Institute of Geography & Earth Sciences en_US

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