naa a22 4500 510808867 CHVBK 20180411083432.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s12542-012-0157-x doi (NATIONALLICENCE)springer-10.1007/s12542-012-0157-x Juvenile phacopid trilobites from the Prague Basin (Czech Republic) [Elektronische Daten] [Petr Budil, Catherine Crônier, Štěpán Manda, Oldřich Fatka, Lukáš Laibl, Arnaud Bignon] Complete early ontogenetic stages of phacopid trilobites are very rare in the fossil record worldwide. Although phacopid trilobites were a common component of the Devonian communities inhabiting the Prague Basin, only two articulated juvenile individuals have been described so far. However, rich and diverse fauna, including common remains of meraspid and young holaspid specimens of the phacopid Pedinopariops superstes superstes, has been found in the late Emsian Daleje Shale (Daleje-Třebotov Formation) at the Čeřinka Quarry near Bubovice. The rather unusual association of skeletal fauna in the Daleje Shale collected from the Čeřinka Quarry probably reflects the specific position of the locality, which corresponds to the transition from shale facies to carbonate facies. This newly described association contains common molted young holaspids, one entire meraspid specimen, and one poorly preserved but entire late meraspid-early holaspid specimen. The young individuals of P. superstes superstes strongly resemble the ancestral Pedinopariops degener; with the exception of their smaller eyes, they are somewhat reminiscent of the coarsely tuberculated descendent Pedinopariops superstes superior. The principal differences between the early stages of P. superstes superstes and the adult specimens include the relatively coarse tuberculation of the dorsal exoskeleton, which is more strongly vaulted and shows a less advanced level of eye development in young specimens. However, co-occurring adult specimens appear to be typical P. superstes. Here, the newly collected material is supplemented with a description of two as yet unreported remains of juvenile Pedinopariops superstes from other localities, and one well preserved specimen of an entire meraspid of Reedops cf. bronni, as well as a detailed discussion of the two previously described specimens of Pedinopariops insequens and Prokops hoeninghausi. Possible causes of an obvious paucity of articulated meraspid and young holaspid specimens when compared with adult and subadult ontogenetic stages in phacopid trilobites are discussed. Springer-Verlag Berlin Heidelberg, 2013 Trilobita nationallicence Phacopida nationallicence Lower Devonian nationallicence Prague Basin nationallicence Barrandian area nationallicence Trilobita nationallicence Phacopida nationallicence Unteres Devon nationallicence Prager Becken nationallicence Barrandium nationallicence Budil Petr Czech Geological Survey, Klárov 3, 118 21, Praha 1, Czech Republic aut Crônier Catherine Université Lille 1, UFR Sciences Terre, UMR 8217 Géosystèmes, 59655, Villeneuve d'Ascq, Cedex, France aut Manda Štěpán Czech Geological Survey, Klárov 3, 118 21, Praha 1, Czech Republic aut Fatka Oldřich Faculty of Science, Institute of Geology and Palaeontology, Charles University, Albertov 6, 128 43, Praha 2, Czech Republic aut Laibl Lukáš Faculty of Science, Institute of Geology and Palaeontology, Charles University, Albertov 6, 128 43, Praha 2, Czech Republic aut Bignon Arnaud Université Lille 1, UFR Sciences Terre, UMR 8217 Géosystèmes, 59655, Villeneuve d'Ascq, Cedex, France aut Paläontologische Zeitschrift Springer-Verlag 87/2(2013-06-01), 219-234 0031-0220 87:2<219 2013 87 12542 https://doi.org/10.1007/s12542-012-0157-x text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12542-012-0157-x text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Budil Petr Czech Geological Survey, Klárov 3, 118 21, Praha 1, Czech Republic aut NATIONALLICENCE 700 1- Crônier Catherine Université Lille 1, UFR Sciences Terre, UMR 8217 Géosystèmes, 59655, Villeneuve d'Ascq, Cedex, France aut NATIONALLICENCE 700 1- Manda Štěpán Czech Geological Survey, Klárov 3, 118 21, Praha 1, Czech Republic aut NATIONALLICENCE 700 1- Fatka Oldřich Faculty of Science, Institute of Geology and Palaeontology, Charles University, Albertov 6, 128 43, Praha 2, Czech Republic aut NATIONALLICENCE 700 1- Laibl Lukáš Faculty of Science, Institute of Geology and Palaeontology, Charles University, Albertov 6, 128 43, Praha 2, Czech Republic aut NATIONALLICENCE 700 1- Bignon Arnaud Université Lille 1, UFR Sciences Terre, UMR 8217 Géosystèmes, 59655, Villeneuve d'Ascq, Cedex, France aut NATIONALLICENCE 773 0- Paläontologische Zeitschrift Springer-Verlag 87/2(2013-06-01), 219-234 0031-0220 87:2<219 2013 87 12542 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer