The small enigmatic mollusc Jinonicella kolebabai Pokorný, 1978 is described from the upper Silurian Cardiola Formation at the Rauchkofel Süd section of the Carnic Alps, Austria. The associated conodonts suggest a late Ludlow (Ludfordian) Polygnathoides siluricus conodont Zone. Previous Silurian records of Jinonicella are known from the Wenlock to Ludlow of the Czech Republic, USA, Gotland of Sweden and the Carnic Alps of Austria. The wide distribution of this taxon across different climatic zones and widely separated areas in the Silurian is problematic, and it is unclear whether Jinonicella was present in high-latitude areas before the end-Ordovician cooling and mass extinction or was dispersed during the Silurian. Possible planktotrophy in Jinonicella and Silurian ocean circulation patterns may explain the dispersal, but within the framework of current palaeogeographical reconstructions the model does not adequately explain an equatorial to polar distribution of ohter contemporaneous benthic faunas from these areas.
Brett, C. E., Ferretti, A., Histon, K. & Schönlaub, H. P. 2009. Silurian sequence stratigraphy of the Carnic Alps, Austria. Palaeogeography, Palaeoclimatology, Palaeoecology, 279, 1–28.
https://doi.org/10.1016/j.palaeo.2009.04.004
Bogolepova, O. K. 1995. Lower Silurian cephalopod limestones from the Mojero River section (Eastern Siberia, Russia) and their paleogeographic relationships. Jahrbuch Der Geologischen Bundesanstalt, 138, 155–160.
Bogolepova, O. K., Gubanov, A. P. & Pease, V. L. 2005. Bohemian-type Silurian (Telychian) bivalves from Arctic Russia. GFF, 127, 247–252.
https://doi.org/10.1080/11035890501274247
Budil, P. 1995. The Middle Devonian Kačák Event in the Barrandian area. Geolines, 3, 7–8.
Chamberlain, J. A. Jr., Chamberlain, R. B. & Brown, J. O. 2016. A mineralized alga and acritarch dominated microbiota from the Tully Formation (Givetian) of Pennsylvania, USA. Geosciences, 6(4), 57, (38 pp.).
Cocks, L. R. M. 2002. Key Lower Palaeozoic faunas from near the Trans European Suture Zone. In Palaeozoic Amalgamation of Central Europe (Winchester, J. A., Pharaoh, T. C. & Verniers, J., eds), Geological Society, London, Special Publications, 201, 37–46.
https://doi.org/10.1144/GSL.SP.2002.201.01.03
Cocks, R. L. M. & Torsvik, T. H. 2006. European geography in a global context from the Vendian to the end of the Palaeozoic. In European Lithosphere Dynamics (Gee, D. G. & Stephenson, R. A., eds), Geological Society, London, Memoirs, 32, 83–95.
https://doi.org/10.1144/GSL.MEM.2006.032.01.05
Corradini, C., Pondrelli, M., Suttner, T. J. & Schönlaub, H. P. 2015. The Pre-Variscan sequence of the Carnic Alps. Berichte der Geologischen Bundesanstalt, 111, 5–40.
Dzik, J. 1994a. Machaeridians, chitons, and conchiferan molluscs of the Mócza Limestone. Palaeontologia Polonica, 53, 213–252.
Dzik, J. 1994b. Evolution of ʻsmall shelly fossilsʼ assemblages of the Early Paleozoic. Acta Palaeontologica Polonica, 39, 247–313.
Ebbestad, J. O. R. & Gutiérrez-Marco, J.-C. 2017. First occurrence of Pterotheca (Gastropoda) from the Silurian (Aeronian) of Spain. Geobios, 50, 97–104.
https://doi.org/10.1016/j.geobios.2017.02.003
Ferretti, A. & Křiž, J. 1995. Cephalopod limestone biofacies in the Silurian of Prague Basin, Bohemia. PALAIOS, 10, 240–253.
https://doi.org/10.2307/3515255
Ferretti, A., Ausich, W. I., Corradini, C., Corriga, M. G. & Schönlaub, H. P. 2016. Stars in the Silurian sky: echinoderm holdfasts from the Carnic Alps, Austria. Geologica Acta, 14, 335–347
Fortey, R. A. & Whitaker, J. E. 1976. Janospira – an Ordovician microfossil in search of a phylum. Lethaia, 9, 397–403.
https://doi.org/10.1111/j.1502-3931.1976.tb00980.x
Frýda, J. 1999. Taxonomic position of suborder Jinonicellina. Věstnik Českého Geologického Ústavu, 74, 27–29.
Gubanov, A. P., Ebbestad, J. O. R. & Männik, P. 2017. The problematic mollusc Jinonicella from the Silurian of North America. GFF, 139, 216–218.
https://doi.org/10.1080/11035897.2017.1291539
Hynda, V. A. 1986. Melkaya bentosnaya fauna ordovika yugo-zapada Vostochno-Évropejskoj platformy [Small Benthic Ordovician Fauna of the Southwestern Part of the Eastern European Platform]. Naukova Dumka, Kiev, 153 pp. [in Russian].
Křiž, J. 1996. Bivalvia dominated communities of Bohemian type from the Silurian and Lower Devonian carbonate facies. In Paleocommunities – a Case Study from the Silurian and Lower Devonian (Boucot, A. J. & Lawson, J. D., eds), pp. 225–252. Cambridge University Press, Cambridge.
Křiž, J. & Bogolepova, O. K. 1995. Cardiola signata Community (Bivalvia) in cephalopod limestone from Tajmyr (Gorstian, Silurian, Russia). Geobios, 28, 573–583.
https://doi.org/10.1016/S0016-6995(95)80212-6
Modliński, Z. & Szymański, B. 1997. The Ordovician lithostratigraphy of the Peribalitic Depression (NE Poland). Geological Quarterly, 41, 273–288.
Nützel, A. 2014. Larval ecology and morphology in fossil gastropods. Palaeontology, 57, 479–503.
https://doi.org/10.1111/pala.12104
Peel, J. S. 2006. Scaphopodization in Palaeozoic molluscs. Palaeontology, 49, 1357–1364.
https://doi.org/10.1111/j.1475-4983.2006.00599.x
Peel, J. S. & Jeppsson, L. 2006. The problematic fossil Jinonicella from the Lower Silurian of Gotland. GFF, 128, 39–42.
https://doi.org/10.1080/11035890601281039
Perrier, V., Bogolepova, O. K., Gubanov, A. P., Williams, M. & Siveter, D. 2014. A pelagic myodocopid ostracod from the Silurian of Arctic Russia. Journal of Micropalaeontology, 34, 51–57.
https://doi.org/10.1144/jmpaleo2013-031
Piecha, M. 2004. The problematic microfossil Jinonicella from the Refrath 1 Borehole (Bergisch Gladbach-Paffrath Syncline; Ardennes-Rhenish Massif, Germany). Courier Forschungsinstitut Senckenberg, 251, 145–149.
Pokorný, V. 1978a. Jinonicellina, a new suborder of presumed Archaeogastropoda. Věstnik Ústfiedního Ústavu Geologického, 53, 39–42.
Pokorný, V. 1978b. Janospira, a presumed archaeogastropod. Lethaia, 11, 80. Runnegar, B. 1977. Found: a phylum for Janospira. Lethaia, 10, 203.
Schönlaub, H. P. 1970. Vorläufige Mitteilung über die Neuaufnahme der silurischen Karbonatfazies der Zentralen Karnischen Alpen (Österreich). Verhandlungen der Geologischen Bundesanstalt, 2, 306–315.
Schönlaub, H. P. 1992. Stratigraphy, biogeography and paleoclimatology of the Alpine Paleozoic and its implications for Plate Movements. Jahrbuch der Geologischen Bundesanstalt, 135, 381–418.
Schönlaub, H. P. & Kreutzer, L. H. 1994. IUGS Subcommission on Silurian Stratigraphy Field Meeting Eastern+Southern Alps, Austria 1994. Berichte der Geologischen Bundesanstalt, 30, 1–156.
Sheehan, P. M. 2001. The Late Ordovician mass extinction. Annual Review of Earth and Planetary Sciences, 29, 331–364.
https://doi.org/10.1146/annurev.earth.29.1.331
Siveter, D. J. & Bogolepova, O. K. 2006. The myodocope ostracod Entomozoe from the Early Silurian of Severnaya Zemlya, Russian Arctic. Norwegian Journal of Geology, 86, 51–58.
Torsvik, T. H., van der Voo, R., Doubrovine, P. V. Burke, K., Steinberger, B., Ashwal, L. D., Trønnes, R. G., Webb, S. J. & Bull, A. L. 2014. Deep mantle structure as a reference frame for movements in and on the Earth. Proceedings of the National Academy of Sciences of the United States of America, 111, 8735–8740.
https://doi.org/10.1073/pnas.1318135111
Von Raumer, J. F. & Stampfli, G. M. 2008. The birth of the Rheic Ocean – Early Palaeozoic subsidence patterns and subsequent tectonic plate scenarios. Tectonophysics, 461, 9–20.
https://doi.org/10.1016/j.tecto.2008.04.012
Walczak, A. & Belka, Z. 2017. Fingerprinting Gondwana versus Baltica provenance: Nd and Sr isotopes in Lower Paleozoic clastic rocks of the Małopolska and Łysogóry terranes, southern Poland. Gondwana Research, 45, 138–151.
https://doi.org/10.1016/j.gr.2017.02.002
Wenzel, B. 1997. Isotopenstratigraphische Untersuchungen an silurischen Abfolgen und deren paläozeanographische Interpretation. Erlanger geologische Abhandlungen, 129, 1–117.
Yochelson, E. L. 1977. Comments on Janospira. Lethaia, 10, 204.https://doi.org/10.1111/j.1502-3931.1977.tb00612.x
