RNDr. Štěpán Manda
Czech Geological Survey
Klárov 3
118 21 Praha 1
tel: +420257089532
fax: +420257531376
stepan.manda@geologycz
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Education

1998 – 2003 Charles University, Praha, 
2003 Mgr., Charles University, Praha, Palaeontology - Geology (Depositional environment and Communities of the Silurian and Early Devonian Cephalopod limestone - Prague Basin, Bohemia),
2003 RNDr., Charles University, Praha,
2003 – present, PhD. Late Silurian and Early Devonian depositional environment and palaeo-communities of the Prague Basin. 

Professional experience

2000 – present Czech Geological Survey, Department of the Regional geology of the Sedimentary Formations.

Special Qualifications

Silurian lithostratigraphy, biostratigraphy and chronostratigraphy,
Phylogeny, Systematics and Palaeoecology of the Palaeozoic Cephalopoda,
Sedimentology of the Carbonate rocks.

Service to the Scientific Community

2005 –  present: Member of editor board, Bulletin of Geosciences, Prague.

Selected papers

Manda, Š. (2001): Some new or little known cephalopods from the Lower Devonian Pragian carbonate shelf (Prague Basin, Bohemia) with remarks on Lochkovian and Pragian cephalopod evolution. Journal of the Czech Geological Society, 46, 3-4, 269-286. Praha.

Lehnert, O.-Frýda, J.-Buggisch, W.-Manda, Š. (2003): A first report of the Ludlow Lau event from the Prague Basin (Barrandian, Czech Republic). Proceeding of the Field Meeting of the Subcommission on Silurian Stratigraphy, Serie Correlación Geológica 18, 139-144. San Juan.  

Manda, Š., Kříž, J. (2006):  Environmental and biotic changes of the subtropical isolated carbonate platforms during Kozlowskii and Lau events (Prague Basin, Silurian, Ludlow). GFF, 128, 2, 161-168.

Lehnert, O., Frýda, J., Buggisch, W., Munnecke, A., Nützel, A., Kříž, J., Manda, Š. (2007): δ13C record across the Ludlow Lau Event: new data from middle palaeolatitudes of northern peri-Gondwana (Prague Basin, Czech Republic). Palaeogeography, Palaeoclimatology, Palaeoecology, 245, 1-2, 227-244.

 

 

Recent papers

Budil, P. - Collette, J. - Manda, Š. (2010): An occurrence of Ceratiocaris papilio Salter in Murvhison, 1959 (Crustacea, Phyllocarida) in the lower Ludfordian (Silurian) of the Prague Basin (Czech Republic). In Richard Aldridge: Programme and Abstracts of the 3rd International Palaeontological Congress, London June 28t - July 3, s. 107. – The Palaeontological Association. London

Budil, P. - Crônier, C. - Manda, Š. - Fatka, O. (2012): Juvenile phacopid trilobites of the Prague Basin (Barrandian area, Czech Republic). In Australian Geosciences Council: : Proceedings of the 34th International Geological Congress 2012, s. 3568. – Australian Geosciences Council. Brisbane. ISBN 978-0-646-57800-2

Budil, P. - Manda, Š. - Bubík, M. - Pálenský, P. - Růžička, M. - Šimůnek, Z. - Valečka, J. - Vodrážka, R. - Pertoldová, J. - Verner, K. - Karenová, J. - Kukal, Z. - Šarič, R. (2010): Geologické etapy, Geologický vývoj na území České republiky, Hlavní události vývoje života na Zemi. In Hrnčiarová, T., Mackovčin, P., Zvara, I. et al: Atlas krajiny České republiky, s. 112-113. – Ministerstvo životního prostředí České republiky. Praha. ISBN 978-80-85116-59-5

Budil, P. - Manda, Š. - Collette, J. (2010): An unusual occurrence of the Laurentian phyllocarid crustacean Ceratiocaris papilio Salter in the lower Ludfordian (Silurian) of Bohemia (peri-Gondwana). – Bulletin of Geosciences 85, 4, 551-564. ISSN 1214-1119. DOI 10.3140/bull.geosci.1212

Budil, P. – Crônier, C. – Manda, Š. – Fatka, O. – Laibl, L. – Bignon, A. (2013): Juvenile phacopid trilobites from the Prague Basin (Czech Republic). – Paläontologische Zeitschrift 87, 2, 219-234. ISSN 0031-0220. DOI 10.1007/s12542-012-0157-x

Budil, P. – Manda, Š. – Tetlie, E. O. (2014): Silurian carcinosomatid eurypterids from the Prague Basin (Czech Republic). – Bulletin of Geosciences 89, 2, 257-267. ISSN 1214-1119. DOI 10.3140/bull.geosci.1440

Budil, P. – Polechová, M. – Manda, Š. – Frýda, J. – Čáp, P. (2013): Ochrana globálních stratotypů v oblasti Barrandienu. – Zprávy o geologických výzkumech v roce 2012 Neuveden, prosinec, 321-322. ISSN 0514-8057

Břízová, E. - Dušek, K. - Havlíček, P. - Holásek, O. - Manda, Š. - Vodrážka, R. (2005): Geologie středního Polabí: předběžné výsledky geologického mapování na listu 13-131 Brandýs nad Labem – Stará Boleslav. – Zprávy o geologických výzkumech v roce 2004 Neuveden, podzim, 19-22. ISSN 0514-8057

Dvořáková, V. – Godány, J. – Franců, J. – Čurda, J. – Bohdálek, P. – Budil, P. – Burda, J. – Dušek, K. – Krejčí, O. – Lojka, R. – Manda, Š. – Müller, P. – Novák, J. – Rambousek, P. – Rýda, K. – Venera, Z. – Šimůnek, Z. (2012): Podkladový materiál pro ministra životního prostředí k problematice nekonvenčního zemního plynu z břidlic a podzemního zplyňování uhlí . Závěrečná zpráva, 70 s. MS Správa oblastních geologů ČGS

Ernst, A. - Manda, Š. - Zágrošek, K. (2011): Cryptostome bryozoan Stictoporella simplex (Počta, 1894) from the Silurian of Bohemia. – Neues Jahrbuch für Geologie und Palaontologie. Abhandlungen 260, 1, 79-85. ISSN 0077-7749. DOI 10.1127/0077-7749/2011/0130

Havlíček, P. - Adamová, M. - Břízová, E. - Čáp, P. - Dušek, K. - Holásek, O. - Hroch, T. - Hradecká, L. - Kadlecová, R. - Klečák, J. - Kolejka, V. - Krupička, J. - Manda, Š. - Mlčoch, B. - Rajchl, M. - Rudolský, J. - Sidorinová, T. - Skácelová, Z. - Táborský, Z. - Tyráček, J. - Vodrážka, R. (2007): Vysvětlivky k základní geologické mapě České republiky 1:25000 13-132 Lysá nad Labem. 100 s. MS Archiv ČGS

Holásek, O. - Adamová, M. - Břízová, E. - Dušek, K. - Čáp, P. - Havlíček, P. - Hradecká, L. - Kadlecová, R. - Kolejka, V. - Krupička, J. - Majer, V. - Manda, Š. - Nývlt, D. - Rajchl, M. - Rudolský, J. - Stehlík, E. F. - Svobodová, I. - Šebesta, J. - Táborský, Z. - Tyráček, J. - Vodrážka, R. (2005): Vysvětlivky k základní geologické mapě České republiky 1 : 25 000. 13-131 Brandýs nad Labem - Stará Boleslav. 60 s. MS Česká geologická služba Praha

Koptíková, L. – Frýda, J. – Hladil, J. – Čejchan, P. – Manda, Š. – Slavík, L. – Čáp, P. – Ferrová, L. – Vodrážková, S. – Frýdová, B. (2012): Geophysical record of the Middle Devonian Basal Chotec event in Perigondwanan, Laurussian and Central Asian terranes: possible global pattern reflecting palaeoclimatic record. In Australian Geosciences Council: Proceedings of the 34th International Geological Congress 2012, s. 3717. – Australian Geosciences Council. Brisbane. ISBN 978-0-646-57800-2

Lehnert, O. - Frýda, J. - Buggisch, W. - Manda, Š. (2003): A first report of the Ludlow Lau Event from the Prague Basin (Barrandian, Czech Republic). – INSUGEO, Serie Correlación Geológica 18, August, 139-144. ISSN 1514-4186

Lehnert, O. - Frýda, J. - Buggisch, W. - Munnecke, A. - Nützel, A. - Kříž, J. - Manda, Š. (2007a): δ13C records across the late Silurian Lau event: New data from middle palaeo-latitudes of northern peri-Gondwana (Prague Basin, Czech Republic). – Palaeogeography, Palaeoclimatology, Palaeoecology 245, 2007, 227-244. ISSN 0031-0182. DOI 10.1016/j.palaeo. 2006.02.022

Manda, Š. (2001): Some new or little known cephalopods from the Lower Devonian Pragian carbonate shelf (Prague Basin, Bohemia) with remarks on Lochkovian and Pragian cephalopod evolution. – Journal of the Czech Geological Society 46, 3/4, 269-286. ISSN 1210-8197

Manda, Š. (2003): Vývoj a společenstva silurských a raně devonských hlavonožcových vápenců (pražská pánev, Čechy). 114 s

Manda, Š. (2004): Early Silurian cephalopod migrations to the Prague Basin (Perunica micro-plate, Bohemia). – Erlanger Geologische Abhandlungen 5, Septemper, 52-53. ISSN 0071-1160

Manda, Š. (2007): New Silurian nautiloids Phragmoceras Broderip, 1839 and Tubiferoceras Hedström, 1917 from the Prague Basin (Bohemia). – Bulletin of Geosciences 82, 2, 119-131. ISSN 1214-1119. DOI 10.3140/bull.geosci.2007.02.119

Manda, Š. (2008): Palaeoecology and palaeogeographic relations of the Silurian phragmoceratids (Nautiloidea, Cephalopoda) of the Prague Basin (Bohemia). – Bulletin of Geosciences 83, 1, 39-62. ISSN 1214-1119. DOI 10.3140/bull.geosci.2008.01.039

Manda, Š. (2008b): Silurian-Early Dervonian cephalopod limestones, Prague Basin. In Vennin E. et al: Facies from Palaeozoic reefs and bioaccumulations, s. 145-147. – Publications Scientifiques du Muséum Paris. Paris. ISBN 978-2-85653-593-6

Manda, Š. (2008b): Trocholites Conrad, 1838 (Nautiloidea, Tarphycerida) in the Middle Ordovician of the Prague Basin and its palaeobiogeographical significance. – Bulletin of Geosciences 83, 3, 327-334. ISSN 1214-1119. DOI 10.3140/bull.geosci.2008.03.327

Manda, Š. - Budil, P. (2007): Stop E1-6: Ludlow and early Přídolí succession at Mušlovka Quarry near Řeporyje; early Ludfordian radiation and the effect of the Ludfordian extinction events in the shallow-water carbonate succession. Fossile Ökosysteme, Exkursionsführer. 10 s. – Freiberg TU Bergakademie Freiberg. Freiberg. ISBN 1433-1284

Manda, Š. - Budil, P. - Verner, K. - Mašek, D. - Soejono, I. - Žák, J. (2006): Zpráva o výsledcích geologického průzkumu. Tunel Praha-Beroun. Závěrečná zpráva, 3 s. MS ČGS Praha

Manda, Š. - Frýda, J. (2010): Silurian-Devonian boundary events and their influence on cephalopod evolution: evolutionary significance of cephalopod egg size during mass extinctions. – Bulletin of Geosciences 85, 3, 513-540. ISSN 1214-1119

Manda, Š. - Havlíček, P. - Holásek, O. - Nývlt, D. - Rajchl, M. - Stehlík, F. - Vodrážka, R. (2006a): Základní geologická mapa Ćeské republiky 1:25 000, list 13-131 Brandýs nad Labem - Stará Boleslav. 1 s

Manda, Š. - Kříž, J. (2005): Environmental and biotic changes of the subtropical isolated carbonate platforms during the Kozlowskii and Lau events (Prague Basin, Silurian, Ludlow). The Dynamic Silurian Earth, Field guide and Abstracts, s. 79. – Geological Survey of Sweden. Švédsko. ISBN 91-7158-714-4

Manda, Š. - Kříž, J. (2006): Environmental and biotic changes in subtropical isolated carbonate platforms during the Silurian Kozlowskii Event, Prague Basin. – GFF 128, 2, 161-168. ISSN 1103-5897

Manda, Š. - Kříž, J. (2007d): New cephalopod limestone horizon in the Ludlow (Gorstian, lower L. scanicus Biozone) of the Prague Basin (Bohemia, Perunica). – Bolletino della Societa Palaeontologica Italiana 46, 1, 33-45. ISSN 0375-7633

Manda, Š. - Turek, V. (2009): Revision of the Pragian Rutoceratoidea Hyatt, 1884 (Nautiloidea, Oncocerida) from the Prague Basin. – Bulletin of Geosciences 84, 1, 127-148. ISSN 1214-1119. DOI 10.3140/bull.geosci.1118

Manda, Š. - Turek, V. (2009b): Minute Silurian oncocerid nautiloids with unusual colour patterns. – Acta Palaeontologica Polonica 54, 3, 503-512. ISSN 0567-7920

Manda, Š. - Turek, V. (2009c): A Silurian oncocerid with preserved colour pattern and muscle scars (Nautiloidea). – Bulletin of Geosciences 84, 4, 755-766. ISSN 1214-1119

Manda, Š. - Turek, V. (2011): LATE EMSIAN RUTOCERATOIDEA (NAUTILOIDEA) FROM THE PRAGUE BASIN, CZECH REPUBLIC: MORPHOLOGY, DIVERSITY AND PALAEOECOLOGY. – Palaeontology 54, 5, 999-1024. ISSN 0031-0239. DOI 10.1111/j.1475-4983.2011.01089.x

Manda, Š. – Frýda, J. (2014): Evolution of the late Ludlow to early Lochkovian brachiopod, trilobite and bivalve communities of the Prague Basin and their link with the global carbon cycle. – GFF 136, 1 Spec. iss, 179-184. ISSN 1103-5897. DOI 10.1080/11035897.2014.882404

Manda, Š. – Turek, V. (2015): Colour patterns on Silurian orthocerid and pseudorthocerid conchs from Gotland - palaeoecological implications. – Estonian journal of earth sciences 64, 1, 74-79. ISSN 1736-4728. DOI 10.3176/earth.2015.13

Manda, Š. – Turek, V. (v tisku): Silurian tarphycerid Discoceras (Cephalopoda, Nautiloidea): systematics, embryonic development and paleoecology. – Journal of Paleontology, ISSN 0022-3360

Manda, Š. – Štorch, P. – Slavík, L. – Frýda, J. – Kříž, J. – Tasáryová, Z. (2012): The graptolite, conodont and sedimentary record through the late Ludlow Kozlowskii Event (Silurian) in the shale-dominated succession of Bohemia. – Geological Magazine 149, 3, 507-531. ISSN 0016-7568. DOI 10.1017/S0016756811000847

Manda, Š. – Štorch, P. – Slavík, L. – Tasáryová, Z. (2016): Mid-Homerian extinction event in a shale-dominated succession in the Prague Synform. In Gurdebeke P., De Weirdt J., Vandenbroucke T.R.A., Cramer B.D: IGCP 591 The Early to Middle Paleozoic Revolution Closing Meeting Abstracts, s. 112. – Ghent University. Ghent

Munnecke, A. - Lehnert, O. - Frýda, J. - Buggisch, W. - Nützel, A. - Kříž, J. - Manda, Š. (2005): δ13C record across the Ludlow Lau Event: new data from mid palaeolatitudes of northern peri-Gondwana (Prague Basin, Czech Republic). The Dynamic Silurian Earth, Field guide and Abstracts, s. 82-83. – Geological Survey of Sweden. Švédsko. ISBN 91-7158-714-4

Munnecke, A. - Lehnert, O. - Frýda, J. - Buggisch, W. - Nützel, A. - Kříž, J. - Manda, Š. (2005): Stable carbon isotope developement across the late Silurian Lau Event in northern peri-Gondwana (Prague Basin, Czech Republic). In -: Second International Symposium of IGCP 503 on Ordovician Palaeogeography and Palaeoclimate, s. 21-22. – Neuveden. Milwaukee. ISBN 0-89326-216-1

Slavík, L. – Štorch, P. – Manda, Š. – Frýda, J. (2014): Integrated stratigraphy of the Ludfordian in the Prague Synform. – GFF 136, 1, 238-242. ISSN 1103-5897. DOI 10.1080/11035897.2013.851733

Tasáryová, Z. - Frýda, J. - Janoušek, V. - Manda, Š. - Štorch, P. - Trubač, J. (2011a): New insights into the Silurian volcanism of the Prague Synform, Bohemian Massif. In Loydell D: Siluria Revisited: Programme and Abstracts, s. 46. – International Subcomission on Silurian Stratigraphy. Neuveden

Tasáryová, Z. - Janoušek, V. - Frýda, J. - Manda, Š. - Štorch, P. - Trubač, J. (2011b): Constraints on petrogenesis and geotectonic setting for Silurian basalts of the Prague Basin (Bohemian Massif). In Williams P., Mitchell R: Mineralogical Magazine. Goldschmidt Abstracts 2011, svazek 75. s. 1988. – Mineralogical Society. Twickenham

Tasáryová, Z. - Janoušek, V. - Manda, Š. - Frýda, J. (2010): Chemismus výlevných vulkanitů siluru pražské pánve. In Radoň, M. a Rapprich, V: 2. Vulkanologický seminář Odborné skupiny vulkanologie České geologické společnosti. Sborník abstraktů a exkurzní průvodce, s. 47-49. – Regionální muzeum v Teplicích, p.o. Teplice. ISBN 978-80-85321-58-6

Tasáryová, Z. – Frýda, J. – Janoušek, V. – Manda, Š. – Štorch, P. – Trubač, J. (2011): New insights into the Silurian volcanism of the Prague Synform, Bohemian Massif, Siluria Revisited-2011 Meeting of the International Subcomission on Stratigraphy & 1st meeting og IGCP 591. 12.7.2011. Ludlow, Velká Británie

Tasáryová, Z. – Hroch, T. – Manda, Š. (2012): Spodnoordovický vulkanismus strašického/komárovského komplexu a silurský vulkanismus svatojánského vulkanického centra, Barrandien. – Sborník Západočeského muzea v Plzni. Příroda 116, zima, 41-52. ISSN 0232-0738

Tasáryová, Z. – Janoušek, V. – Manda, Š. – Frýda, J. (2010): Chemismus výlevných vulkanitů siluru pražské pánve, 2. seminář OSV. podzim 2010. Teplice, ČR

Tasáryová, Z. – Pruner, P. – Manda, Š. – Janoušek, V. – Schnabl, P. – Štorch, P. – Frýda, J. – Šifnerová, K. – Erban, V. (2012a): Perunica microplate in Silurian period: implications from basalt geochemistry, palaeomagnetism and faunas (Prague Basin, Teplá-Barrandian Unit, Bohemian Massif). In BRGM & SGF: Géologie de la France, svazek 2012. s. 213-214. – BRGM & SGF. Orléans. ISBN 978-2-7159-2535-9

Tasáryová, Z. – Schnabl, P. – Janoušek, V. – Pruner, P. – Štorch, P. – Kletetschka, G. – Čížková, K. – Šlechta, S. – Manda, Š. – Erban, V. – Frýda, J. (2013): Palaeogeography of Prague Synform in Silurian times (Wenlock-Ludlow): Insights from palaeomagnetism, basalt geochemistry and biostratigraphy. In Žák J., Zulauf G. & Röhling H.-G: Crustal evolution and geodynamic processes in Central Europe. Proceedings of the Joint conference of the Czech and German geological societies held in Plzneň (Pilsen), September 1 - 19, 2013. SDGG - Schriftenreihe der Deutschen Gesselschaft für Geowissenschaften, s. 105. – Schweizerbart. Stuttgart. ISBN 978-3-510-49231-2

Tasáryová, Z. – Schnabl, P. – Janoušek, V. – Pruner, P. – Štorch, P. – Čížková, K. – Manda, Š. – Frýda, J. (2014): Paleomagnetism and geochemistry of middle Silurian volcanic rocks of the Prague Basin. In R. Zhan & B. Huang: IGCP 591 Field Workshop 2014, Kunming, China, Extended Summary, s. 158-159. – Nanjing University Press. Nanjing. ISBN 978-7-305-13559-0

Tasáryová, Z. – Schnabl, P. – Čížková, K. – Pruner, P. – Janoušek, V. – Rapprich, V. – Manda, Š. – Štorch, P. – Frýda, J. – Trubač, J. (2013): Gorstian palaeoposition and geotectonic setting of Suchomasty Volcanic Centre (Silurian volcanic rocks of the Prague Basin, Bohemian Massif). 13.6.2013. Lund University

Tasáryová, Z. – Schnabl, P. – Čížková, K. – Pruner, P. – Janoušek, V. – Rapprich, V. – Štorch, P. – Manda, Š. – Frýda, J. – Trubač, J. (2014): Gorstian palaeoposition and geotectonic setting of Suchomasty Volcanic Centre (Silurian, Prague Basin, Teplá-Barrandian Unit, Bohemian Massif). – GFF 136, 1, 262-265. ISSN 1103-5897. DOI 10.1080/11035897.2013.879735

Tasáryová, Z. – Schnabl, P. – Čížková, K. – Pruner, P. – Štorch, P. – Manda, Š. – Janoušek, V. – Rapprich, V. – Frýda, J. (2013): Gorstian paleoposition and geotectonic setting of Suchomasty volcanic centre (Prague Synform, Bohemia). In Lindskog A. & Mehlqvist K: Proceedings of the 3rd IGCP 591 Annual Meeting, s. 314-315. – Lund University. Lund. ISBN 978-91-86746-87-2

Turek, V. - Manda, Š. (2010): Variability of colour pattern and shell malformations in Silurian nautiloid Peismoceras Hyatt, 1884. – Journal of the National Museum (Prague). Natural History Series 179, 16, 171-178. ISSN 1802-6842

Turek, V. - Manda, Š. (2011): Colour pattern polymorphism in Silurian nautiloid Phragmoceras Broderip, 1839. – Bulletin of Geosciences 86, 1, 91-105. ISSN 1214-1119. DOI 10.3140/bull.geosci.1240

Turek, V. – Manda, Š. (2012): “An endocochleate experiment” in the Silurian straight-shelled cephalopod Sphooceras. – Bulletin of Geosciences 87, 4, 767-813. ISSN 1214-1119. DOI 10.3140/bull.geosci.1335

Turek, V. – Manda, Š. (2016): Early ontogeny, anomalous growth, and healed injuries in the Silurian nautiloid Ophioceras Barrande – Implications for hatching and the autecology of the Tarphycerida. – Bulletin of Geosciences 91, 2, 331-366. ISSN 1214-1119. DOI 10.3140/bull.geosci.1596

Štorch, P. – Manda, Š. – Loydell, D. K. (2014): The early Ludfordian leintwardinensis graptolite Event and the Gorstian–Ludfordian boundary in Bohemia (Silurian, Czech Republic). – Palaeontology 57, 5, 1003-1043. ISSN 0031-0239. DOI 10.1111/pala.12099

Štorch, P. – Manda, Š. – Slavík, L. – Tasáryová, Z. – Melchin, M. (2016): Wenlock–Ludlow boundary interval revisited: new insights from the offshore facies of the Prague Synform, Czech Republic. – Canadian Journal of Earth Sciences 53, 7, 666-673. ISSN 0008-4077. DOI 10.1139/cjes-2015-0161

Štorch, P. – Manda, Š. – Tasáryová, Z. (2014): Rhuddanian-Aeronian boundary strata in graptolite-bearing black shale succesion of the Barrandian area (Czech Republic). In R. Zhan & B. Huang: IGCP 591 Field Workshop 2014, Kunming, China, Extended Summary, s. 148-151. – Nanjing University Press. Nanjing. ISBN 978-7-305-13559-0

Štorch, P. – Manda, Š. – Tasáryová, Z. (2015): ISSS GSSP Workshop Prague 2015: GSSP of the Silurian stages revisited. Excursion guide book - Silurian chronostratigraphy and global extinction events: selected insights from Prague Synform, Czech Republic. Neuveden. 26 s. – Intitute of Geology of the Academy of Sciences and the Czech Geological Survey. Praha. ISBN Nemá ISBN

Štorch, P. – Manda, Š. – Tasáryová, Z. – Frýda, J. – Koptíková, L. – Melchin, M. (v tisku): A proposed new global stratotype for Aeronian Stage of the Silurian System: Hlásná Třebaň section, Czech Republic. – Lethaia, ISSN 0024-1164 (on line). DOI https://doi.org/10.1111/let.12250

Štorch, P. – Melchin, M. – Manda, Š. – Tasáryová, Z. (2015): ISSS GSSP Workshop: GSSPs of the Silurian stages revisited. Praha

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