TY - JOUR A1 - Steiner,M. A1 - Hu,S.X. A1 - Liu,J. A1 - Keupp,H. T1 - A new species of Hallucigenia from the Cambrian Stage 4 Wulongqing Formation of Yunnan (South China) and the structure of sclerites in lobopodians JF - Bulletin of Geosciences JA - Bull. Geosci. Y1 - 2012 VL - 87 IS - 1 SP - 107 EP - 124 CY - Prague PB - Czech Geological Survey SN - 1803-1943 (online), 1802-6222 (print) AV - Free KW - Cambrian KW - lobopodians KW - Hallucigenia KW - Guanshan KW - fossil Lagerstatte KW - sclerites AB - Hallucigenia hongmeia sp. nov. and Hallucigenia sparsa are described from the Cambrian Stage 4 Guanshan fossil Lagerstatte of Wulongqing Formation from Guangwei in Kunming district, Yunnan Province, South China. The paired trunk sclerites of lobopodians reveal a general net-like microstructure, which is documented for the genera Hallucigenia, Onychodictyon and Microdictyon. This microstructure is comparable to a similar microstructure in paired trunk sclerites of the palaeoscolecidan sensu lato Cricocosmia and Tabelliscolex. The net-like trunk sclerites of lobopodians are interpreted as having carried numerous sensory or secretory papillae. Lobopodian sclerites such as Hallucigenia, Onychodictyon and Microdictyon and the palaeoscolecidans s.l. Cricocosmia and Tabellicsolex were primarily composed of tanned organic structures. Duplicates of trunk sclerites in Microdictyon and Cricocosmia point to a moulting of the external cuticle. The structure and form of prominent claws in Hallucigenia hongmeia sp. nov. are interpreted as indicative of an adapted lifestyle in the epibenthos. ER -