Hyloidichnus bifurcatus Gilmore, 1927 and Limnopus heterodactylus (King, 1845) from the Early Permian of Southern Alps (N Italy): A New Equilibrium in the Ichnofauna

REFERENCES

• Arduini , P. , Krieger , C. , Rossi , M. and Santi , G. 2003 . Early Permian vertebrates ichnoassociations in Scioc Valley – Orobic Basin – (Lombardy – Northern Italy) . Neues Jahrbuch fur Geologie und Palaontologie Monatshefte , 7 : 385 – 399 .
   Google Scholar
• Avanzini , M. , Bargossi , G. , Borsato , A. , Castiglioni , G. B. , Cucato , M. , Morelli , C. , Prosser , G. and Sapelza , A. 2007 . “ Note illustrative della Carta Geologica d’Italia alla scala 1:50.000, Foglio 026 Appiano ” . 184 Servizio Geologico d’Italia , , Roma : APAT, Dipartimento Difesa del Suolo .
   Google Scholar
• Avanzini , M. , Bernardi , M. and Nicosia , U. 2011 . The Permo-Triassic Tetrapod faunal Diversity in the Italian Southern Alps . Earth and Environmental Sciences , : 591 – 608 .
   Google Scholar
• Avanzini , M. , Ceoloni , P. , Conti , M. A. , Leonardi , G. , Manni , R. , Mariotti , N. , Mietto , P. , Muraro , C. , Nicosia , U. , Sacchi , E. , Santi , G. and Spezzamonte , M. 2001 . Permian and Triassic tetrapod ichnofaunal units of Northern Italy, potential contribution to continental biochronology . Natura Bresciana, Monografia , 25 : 89 – 107 .
   Google Scholar
• Avanzini , M. , Neri , C. , Nicosia , U. and Conti , M. A. 2008 . A new Early Permian ichnocenosis from the “Gruppo vulcanico atesino” (Mt. Luco, Southern Alps, Italy) . Studi Trentini di Scienze Naturali. Acta Geologica , 83 : 231 – 236 .
   Google Scholar
• Baird , D. 1952 . Revision of the Pennsylvanian and Permian footprints Limnopus, Allopus and Baropus . Journal of Paleontology , 26 : 832 – 840 .
   Google Scholar
• Baird , D. 1965 . Footprints from the Cutler Formation . United States Geological Survey, professional paper , 503C : 47 – 50 .
   Google Scholar
• Bernardi , M. and Avanzini , M. 2011 . Locomotor behavior in early reptiles: Insights from an unusual Erpetopus trackway . Journal of Paleontology , 85 ( 5 ) : 925 – 929 .
   Google Scholar
• Berra , F. and Felletti , F. 2011 . Syndepositional tectonics recorded by soft-sediment deformation and liquefaction structures (continental Lower Permian sediments, Southern Alps, Northern Italy): Stratigraphic significance . Sedimentary Geology , 235 ( 3 ) : 249 – 263 .
   Web of Science ®Google Scholar
• Berra , F. , Caironi , V. , Siletto , G. and Tiepolo , M. 2008 . Vincoli cronostratigrafici sull’attività vulcanica del Permiano inferiore nei bacini permiani delle Prealpi Orobie (Lombardia): significato delle datazioni su zirconi con laser ablation ICPMS . : 66 Convegno “Una nuova geologia per la Lombardia,” Milano 6–7 sett 2008, Istit Lomb—Reg Lomb, abstract volume
   Google Scholar
• Berruti , G. 1969 . Osservazioni biostratigrafiche sulle formazioni continentali pre-quaternarie delle Valli Trompia e Sabbia . Natura Bresciana. Annali del Museo Civico di Scienze Naturali , 6 : 3 – 32 . Brescia
   Google Scholar
• Cadel , G. , Fuchs , Y. and Meneghel , L. 1987 . Uranium mineralization associated with the evolution of a Permo-Carboniferous volcanic field—examples from Novazza and Val Vedello (northern Italy) . Uranium , 3 : 407 – 421 .
   Google Scholar
• Casati , P. and Gnaccolini , M. 1967 . Geologia delle Alpi Orobie occidentali . Rivista Italiana di Paeontologia e Stratigrafia , 73 : 25 – 162 .
   Google Scholar
• Cassinis , G. 1966 . La Formazione di Collio nell’area-tipo dell’alta Val Trompia (Permiano inferiore bresciano) . Rivista Italiana di Paleontologia e Stratigrafia , 72 : 507 – 588 .
   Google Scholar
• Cassinis , G. 1999 . “ Permian stratigraphy in the western Collio Basin. 4. Chrono-stratigraphical data and interpretation ” . Edited by: Cassinis , G. , Cortesogno , L. , Gaggero , L. , Massari , F. , Neri , C. , Nicosia , U. and Pittau , P. 69 – 71 . Italy : Field Trip Guidebook. International Congress on The Continental Permian of the Southern Alps and Sardinia . Regional reports and general correlations, Earth Science Department, Pavia University, Pavia, Stratigraphy and Facies of the Permian Deposits between Eastern Lombardy and the Western Dolomites
   Google Scholar
• Cassinis , G. and Neri , C. 1992 . Sedimentary and palaeotectonic evolution of some Permian continental basins in the central Southern Alps, Italy . Cuadernos de Geología Ibérica , 16 : 145 – 176 .
   Google Scholar
• Cassinis , G. and Santi , G. 2005 . “ Permian tetrapod footprint assemblages from Southern Europe and their stratigraphic implications ” . Edited by: Lucas , S. G. and Zeigler , K. E. Vol. 30 , 26 – 38 . New Mexico Museum of Natural History and Science Bulletin . The Nonmarine Permian
   Google Scholar
• Cassinis , G. , Massari , F. , Neri , C. and Venturini , C. 1988 . The continental Permian in the Southern Alps (Italy). A review . Zeitschrift für Geologische Wissenschaften , 16 : 1117 – 1126 .
   Web of Science ®Google Scholar
• Cassinis , G. , Nicosia , U. , Pittau , P. and Ronchi , A. 2002 . Paleontological and radiometric data from the Permian continental deposits of the central-eastern Southern Alps (Italy) and their stratigraphic implications . Mémoires Association Géologues du Permien , 2 : 53 – 74 .
   Google Scholar
• Cassinis , G. , Perotti , C. R. and Ronchi , A. 2012 . Permian continental basins in the Southern Alps (Italy) and peri-mediterranean correlations . International Journal of Earth Sciences , 101 ( 1 ) : 129 – 157 .
   Web of Science ®Google Scholar
• Ceoloni , P. , Conti , M. A. , Mariotti , N. , Mietto , P. and Nicosia , U. 1987 . Tetrapod footprints from Collio Formation (Lombardy, Northern Italy) . Memorie di Scienze Geologiche , 39 : 213 – 233 .
   Google Scholar
• Ceoloni , P. , Conti , M. A. , Mariotti , N. and Nicosia , U. 1986 . New Late Permian tetrapod footprints from southern Alps . Memorie della Società Geologica Italiana , 34 : 45 – 65 .
   Google Scholar
• Conti , M. A. , Leonardi , G. , Mietto , P. and Nicosia , U. 2000 . “ Orme di tetrapodi non dinosauriani nel Paleozoico e Mesozoico in Italia ” . In I dinosauri di Rovereto. Le orme giurassiche dei Lavini di Marco (Trentino) e gli altri resti fossili italiani , Edited by: Leonardi and Mietto , P. 237 – 320 . Pisa : Accademia Editoriale .
   Google Scholar
• Conti , M. A. , Mariotti , N. , Mietto , P. and Nicosia , U. 1991 . Nuove ricerche sugli icnofossili della Formazione di Collio in Val trompia (Brescia) . Natura Bresciana. Annali del Museo Civico di Scienze Naturali, Brescia , 26 ( 1989 ) : 109 – 119 .
   Google Scholar
• Conti , M. A. , Mariotti , N. , Nicosia , U. and Pittau , P. 1997 . “ Succession of selected bioevents in the continental Permian of the Southern Alps (Italy): Improvements in intrabasinal and interregional correlations ” . Edited by: Dickins , J. M. , Zunyi , Y. , Yhongfu , Y. , Lucas , S. G. and Acharyya , S. J. 51 – 65 . Cambridge, UK : Cambridge University Press . Late Paleozoic and Early Mesozoic Circumpacific Events and Their Global Correlation
   Google Scholar
• Curioni , G. 1870 . Osservazioni geologiche sulla Val Trompia . Rendiconti Istituto Lombardo di Scienze e Lettere, Arti, Memorie, Serie , 3 ( 2 ) : 1 – 60 .
   Google Scholar
• Delage , A. 1912 . Empreintes de pieds de grands quadrupedes dans le Permien Inferieur de l’Herault . Académie des Sciences et Lettres de Montpellier. Mémoires de la Section des Sciences , 4 : 221 – 267 .
   Google Scholar
• Demathieu , G. R. , Gand , G. and Toutin-Morin , N. 1991 . La palichnofaune des bassins permiens Provencaux . Geobios , 25 : 19 – 54 .
   Google Scholar
• Dozy , J. J. 1935 . Einige Tierfärhten aus dem Unteren Perm der Bergamasker Alpen . Paläontologie Zeitschrieft , 17 ( 1/2 ) : 45 – 55 .
   Google Scholar
• Ellenberger , P. 1983 . Sur la zonation ichnologique du Permien moyen (Saxonien) et du Permien inferieur (Autunien) du bassin de Lodève (Hérault) . Compte Rendu Acad. Sci. , 297 ( ser.2 ) : 553 – 558 .
   Google Scholar
• Gand , G. 1988 . Les traces de vertébrés tétrapodes du Permien français . : 341 PhD Thesis, Université de Bourgogne Edition Centre des Sciences de la Terre, Dijon
   Google Scholar
• Gand , G. 1993 . La palichnofaune de vertébrés tétrapodes du bassin permien de Saint-Affrique (Aveyron): Comparaisons et conséquences stratigraphiques . Geologie de la France , 1 : 41 – 56 .
   Google Scholar
• Gand , G. and Durand , M. 2006 . Tetrapod footprint ichno-associations from French Permian basins. Comparisons with other Euramerican ichnofaunas . Geological Society, London, Special Publications , 265 ( 1 ) : 157 – 177 .
   Google Scholar
• Gand , G. and Haubold , H. 1984 . Traces de vertébrés du Permien du bassin de Saint-Affrique (Description, datation, comparaison avec celles du bassin de Lodève) . Revue Géologie meditérranéenne , 11 ( 4 ) : 321 – 348 .
   Google Scholar
• Gand , G. , Kerp , H. , Parsons , C. and Martínez-García , E. 1997 . Palaeoenvironmental andstratigraphic aspects of animal traces and plant remains in Spanish Permian red beds (Peña Sagra, Cantabrian Mountains, Spain) . Geobios , 30 ( 2 ) : 295 – 318 .
   Web of Science ®Google Scholar
• Gand , G. , Tüysüz , O. , Steyer , J. S. , Allain , R. , Sakınç , M. , Sanchez , S. , Celal Şengör , A. M. and Sen , S. 2011 . New Permian tetrapod footprints and macroflora from Turkey (Çakraz Formation, northwestern Anatolia): Biostratigraphic and palaeoenvironmental implications . Comptes Rendus Palevol , 10 ( 8 ) : 617 – 625 .
   Web of Science ®Google Scholar
• Geinitz , H. B. 1861 . “ Dyas oder die Zechsteinformation und das Rothliegend: Die animalischen Ueberreste der Dyas (Vol. 1) ” . 123 Engelmann . W. (ed.), Leipzieg, Germany
   Google Scholar
• Geinitz , H. B. 1869 . Ueber fossile Pflanzenreste aus dem Dyas von VaI Trompia . Neues Jahrbuch fur Mineralogie, Geologie und Paläontontologie , : 456 – 461 .
   Google Scholar
• Geinitz , H. B. and Deichmüller , J. V. 1882 . Die Saurier der unteren Dyas von Sachsen . Palaeontographica , 29 : 1 – 4 .
   Google Scholar
• Gianotti , R. , Morini , S. , Mottalini , G. and Santi , G. 2002 . La successione permiana e triassica tra la Rocca di Pescegallo ed il Lago Valmora (Lombardia, Bacino Orobico). Stratigrafia e paleontologia . Atti Ticinensi di Scienze della Terra, Pavia , 43 : 55 – 72 .
   Google Scholar
• Gilmore , G. W. 1927 . Fossil footprints from the Grand Canyon: Second contribution . Smithsonian Miscellaneous Collections , 80 ( 3 ) : 1 – 78 .
   Google Scholar
• Gilmore , G. W. 1928 . Fossil footprints in the Grand Canyon: Third contribution . Smithsonian Miscellaneous Collections, Institution Publication , 80 ( 8 ) : 1 – 23 .
   Google Scholar
• Haubold , H. 1970 . Versuch der Revision der Amphibien-Fährten des Karbon und Perm . Freiberger Forschungshefte C , 260 : 83 – 117 .
   Google Scholar
• Haubold , H. 1971 . “ Ichnia Amphibiourum et Retpiliorum fossilium ” . Edited by: Kuhn , O. 124 Stuttgart : Gustav Fischer Verlag . Handbuch der Paläoherpetologie
   Google Scholar
• Haubold , H. 1973 . Die Tetrapodenfährten aus dem Perm Europas . Freiberger Forschungschefte, C , 285 : 5 – 55 .
   Google Scholar
• Haubold , H. 1996 . Ichnotaxonomie und Klassifikation von Tetrapodenfährten aus dem Perm . Hallesches Jahrbuch für Geowissenschaften, B , 18 : 23 – 88 .
   Google Scholar
• Haubold , H. 2000 . Tetrapodenfährten aus dem Perm–Kenntnisstand und Progress 2000 . Hallesches Jahrbuch für Geowissenschaften, B , 22 : 1 – 16 .
   Google Scholar
• Haubold , H. and Katzung , G. 1975 . Die position der Autun/Saxon Grenze (Unteres Perm) in Europa und Nordamerika . Schriftenreihe Geologische Wissenschaften , 3 : 87 – 138 .
   Google Scholar
• Haubold , H. and Lucas , S. G. 2001 . Die Tetrapodenfährten der Choza Formation (Texas) und das Artinsk-Alter der Redbed Ichnofaunen des Unteren Perm . Hallesches Jahrbuch für Geowissenschaften , 23 : 79 – 108 .
   Google Scholar
• Haubold , H. and Lucas , S. G. 2003 . Tetrapod footprints of the Lower Permian Choza Formation . Paläontologische Zeitschrieft , 77 : 247 – 261 .
   Google Scholar
• Haubold , H. , Hunt , A. P. , Lucas , S. G. and Lockley , M. G. 1995 . Wolfcampian (Early Permian) vertebrate tracks from Arizona and New Mexico . New Mexico Museum of Natural History and Science Bulletin , 6 : 135 – 165 .
   Google Scholar
• Heyler , D. and Lessertisseur , J. 1963 . Pistes de tétrapodes Permiens dans la région de Lodève (Hérault) . Muséum national d’histoire naturelle, C , 11 ( 2 ) : 100
   Google Scholar
• Hunt , A. P. and Lucas , S. G. 2006 . Permian tetrapod ichnofacies . Geological Society, London, Special Publications , 265 ( 1 ) : 137 – 156 .
   Google Scholar
• Hunt , A. P. and Lucas , S. G. 2007 . Tetrapod ichnofacies: A new paradigm . Ichnos , 14 ( 1–2 ) : 59 – 68 .
   Google Scholar
• King , A. T. 1845 . Description of fossil footmarks found in the Carboniferous series in Westmoreland County, PA . American Journal of Science , 48 : 343 – 352 .
   Google Scholar
• Klötzli , U. S. , Mair , V. and Bargossi , G. M. 2003 . The “Bozener Quarzporphyr” (Southern Alps, Italy): Single zircon U/Pb age evidence for 10 million years of magmatic activity in the Lower Permian . Mitteilungen der Österreichischen Mineralogischen Gesellschaft , 148 : 187 – 188 .
   Google Scholar
• Leonardi , G. 1987 . “ Glossary and Manual of Tetrapod Footprint Palaeoichnology ” . 117 Brasilia : Departamento Nacional de Produção Mineral .
   Google Scholar
• Lucas , S. G. 2007 . Tetrapod footprint biostratigraphy and biochronology . Ichnos , 14 ( 1–2 ) : 5 – 38 .
   Google Scholar
• Lucas , S. G. and Dalman , S. G. 2013 . “ Alfred King's Pennsylvanian tetrapod footprints from western Pennsylvania ” . Edited by: Lucas , S. G. , DiMichele , W. A. , Barrick , J. E. , Schneider , J. W. and Spielmann , J. A. Vol. 60 , 233 – 239 . Bulletin : New Mexico Museum of Natural History and Science . The Carboniferous-Permian Transition
   Google Scholar
• Lucas , S. G. , Lerner , A. J. and Haubold , H. 2001 . First record of Amphisauropus and Varanopus in the Lower Permian Abo Formation, central New Mexico . Hallesches Jahrbuch für Geowissenschaften B , 23 : 69 – 78 .
   Google Scholar
• Lucas , S. G. and Hunt , A. P. 2006 . Permian tetrapod footprints: Biostratigraphy and biochronology . Geological Society, London, Special Publications , 265 ( 1 ) : 179 – 200 .
   Google Scholar
• Lucas , S. G. , Minter , N. J. , Spielmann , J. A. , Smith , J. A. and Braddy , S. J. 2005 . “ Early Permian ichnofossils from the northern Caballo Mountains, Sierra County, New Mexico ” . Edited by: Lucas , S. G. , Zeigler , K. E. and Spielmann , J. A. Vol. 31 , 151 – 162 . Museum of Natural History and Science Bulletin . The Permian of central New Mexico
   Google Scholar
• Lucas , S. G. , Voigt , S. , Lerner , A. J. and Nelson , W. J. 2011 . Late Early Permian continental ichnofauna from Lake Kemp, north-central Texas, USA . Palaeogeography, Palaeoclimatology, Palaeoecology , 308 : 395 – 404 .
   Web of Science ®Google Scholar
• Lull , R. S. 1918 . Fossil footprints from the Grand Canyon of Colorado . American Journal of Science , 45 : 337 – 346 . ser. 4
   Google Scholar
• Marchetti , L. , Bernardi , M. and Avanzini , M. 2013 . Some insights on well-preserved Amphisauropus and Erpetopus trackways from the Eastern Collio basin (Trentino-Alto Adige, NE Italy) . Bollettino della Società Paleontologica Italiana , 52 ( 1 ) : 55 – 62 .
   Google Scholar
• Marchetti , L. , Santi , G. and Avanzini , M. 2012 . The problem of small footprints in paleoichnology related to extramorphologies: New data from the Early Permian Erpetopus. X Congresso GEOSED, Feltre 2-6 Luglio 2012, poster presentation . Rendiconti online della società Paleontologica Italiana , 20 : 48 – 50 .
   Google Scholar
• Marocchi , M. , Morelli , C. , Mair , V. , Klötzli , U. and Bargossi , G. M. 2008 . Evolution of large silicic magma systems: New U-Pb zircon data on the NW Permian Athesian Volcanic Group (Southern Alps, Italy) . The Journal of Geology , 116 ( 5 ) : 480 – 498 .
   Web of Science ®Google Scholar
• Marsh , O. C. 1894 . Footprints of vertebrates in the Coal Measures of Kansas . American Journal of Science , 283 : 81 – 87 . 48
   Google Scholar
• Melchor , R. N. and Swithin Sarjeant , W. A. 2004 . Small amphibian and reptile footprints from the Permian Carapacha basin, Argentina . Ichnos , 11 ( 1–2 ) : 57 – 78 .
   Google Scholar
• Moodie , R. L. 1929 . Vertebrate footprints from the Red Beds of Texas . American Journal of Science , 97 : 352 – 368 .
   Google Scholar
• Moodie , R. L. 1930 . Vertebrate footprints from the red bed of Texas II . Journal of Geology , 38 : 548 – 565 .
   Google Scholar
• Müller , A. H. 1954 . Zur Ichnologie und Stratonomie des Oberrotliegenden von Tambach (Thüringen) . Paläontologische Zeitschrift , 28 ( 3–4 ) : 189 – 203 .
   Google Scholar
• Neri , C. , Avanzini , M. , Bampi , T. , Bargossi , G. M. , Mair , V. , Morelli , C. , Pittau , P. , Ronchi , A. and Sapelza , A. 1999 . “ The Tregiovo area and related volcanics in the Tregiovo section ” . 81 – 89 . , Earth Science Department, Pavia University, Pavia, Stratigraphy and Facies of the Permian Deposits Between Eastern Lombardy and the Western Dolomites—Field Trip Guidebook
   Google Scholar
• Nicosia , U. , Ronchi , A. and Santi , G. 2000 . Permian tetrapod footprints from W Orobic Basin (Northern Italy). Biochronological and evolutionary remarks . Geobios , 33 ( 6 ) : 753 – 768 .
   Web of Science ®Google Scholar
• Pabst , W. 1896 . Thierfährten aus dem Oberrothliegenden von Tambach in Thüringen . Zeitschrift der Deutschen Geologischen Gesellschaft , 48 : 638 – 643 .
   Google Scholar
• Petti , F. M. , Bernardi , M. , Avanzini , M. and Ashley Ross , M. A. 2011 . “ Transition between terrestrial-submerged walking and swimming in the Early Permian tetrapod tracks of Southern Alps (northern Italy) ” . Plymouth , UK : Palaeontological Association Annual Meeting . poster presentation
   Google Scholar
• Philippe , S. , Villemaire , C. , Lancelot , J. R. , Girod , M. and Mercadier , H. 1987 . Données minéralogiques et isotopiques sur deux gîtes hydrothermaux uranifères du bassin volcano-sédimentaire permien de Collio Orobico (Alpes Bergamasques): mise en évidence d’une phase de remobilisation crétacée . Bull Minéral , 110 : 283 – 303 .
   Google Scholar
• Pohlig , H. 1892 . “ Altpermische Saurierfährten, Fische und Medusen der Gegend von Friedrichroda i. Thüringen ” . Edited by: Anonymous . 59 – 64 . Leipzig , , Germany : Engelmann . Festschrift zum 70. Geburtstag von Rudolf Leuckardt
   Google Scholar
• Romer , A. S. and Price , L. W. 1940 . Review of the Pelycosauria . Geological Society of America Special Papers , 28 : 1 – 534 .
   Google Scholar
• Ronchi , A. and Santi , G. 2003 . Non-marine biota from the Lower Permian of the Central Southern Alps (Orobic and Collio Basins, N Italy): A key to the paleoenvironment . Geobios , 36 ( 6 ) : 749 – 760 .
   Web of Science ®Google Scholar
• Ronchi , A. , Santi , G. and Confortini , F. 2005 . “ Biostratigraphy and facies in the continental deposits of the central Orobic Basin: A key section in the Lower Permian of the Southern Alps (Italy ” . Edited by: Lucas , S. G. and Zeigler , K. E. Vol. 30 , 273 – 281 . New Mexico Museum of Natural History & Science Bulletin . The Nonmarine Permian
   Google Scholar
• Santi , G. 1999 . Icniti di tetrapodi permiani nelle Alpi bergamasche. Nota preliminare . Rendiconti Istituto Lombardo Accademia di Scienze e Lettere, Classe B , 133 : 41 – 50 .
   Google Scholar
• Santi , G. 2003 . Early permian tetrapod footprints from the Orobic Basin (Southern Alps-Northern Italy). Data, problems, hypotheses . Bollettino della Società Geologica Italiana. Volume speciale , 2 : 59 – 66 .
   Google Scholar
• Santi , G. 2005 . Lower Permian palaeoichnology from the Orobic Basin (northern Italy) . Geo. Alp , 2 : 77 – 90 .
   Google Scholar
• Santi , G. 2007a . Variation in the ichnofauna of the Collio Formation (Lower Permian) in the South-Alpine region (northern Italy) . Ichnos , 14 ( 1–2 ) : 91 – 104 .
   Google Scholar
• Santi , G. 2007b . A short critique of the ichnotaxonomic dualism Camunipes-Erpetopus, Lower Permian ichnogenera from Europe and North America . Ichnos , 14 : 185 – 191 .
   Google Scholar
• Santi , G. 2008 . The reality of the Batrachichnus ichnofacies; proof from the Lower Permian of the Orobic and Trompia basins (south Alpine region, northern Italy) . Bollettino della Societa Geologica Italiana , 127 ( 3 ) : 533 – 544 .
   Google Scholar
• Santi , G. and Krieger , C. 2001 . Lower Permian tetrapod footprints from Brembana Valley – Orobic Basin – (Lombardy, Northern Italy) . Revue de Paleobiologie , 20 ( 1 ) : 45 – 68 .
   Google Scholar
• Santi , G. and Nicosia , U. 2008 . The ichnofacies concept in vertebrate ichnology . Studi Trentini di Scienze Naturali, Acta Geologica , 83 : 223 – 229 .
   Google Scholar
• Santi , G. and Stoppini , M. 2005 . Predator-prey interaction in the Permian of the orobic basin (North Italy) . PalArch's Journal of Vertebrate Palaeontology , 4 ( 2 ) : 8 – 18 .
   Google Scholar
• Sarjeant , W. A. S. 1971 . Vertebrate tracks from the Permian of Castle Peak, Texas . Texas Journal of Science , 22 : 344 – 366 .
   Web of Science ®Google Scholar
• Schaltegger , U. and Brack , P. 2007 . Crustal-scale magmatic systems during intracontinental strike-slip tectonics: U, Pb and Hf isotopic constraints from Permian magmatic rocks of the Southern Alps . International Journal of Earth Sciences , 96 ( 6 ) : 1131 – 1151 .
   Web of Science ®Google Scholar
• Sciunnach , D. 2001 . Benthic foraminifera from the upper Collio Formation (Lower Permian, Lombardy Southern Alps): implications for the palaeogeography of the peri‐Tethyan area . Terra Nova , 13 ( 2 ) : 150 – 155 .
   Web of Science ®Google Scholar
• Swanson , B. A. and Carlson , K. J. 2002 . Walk, wade or swim? Vertebrate traces on an Early Permian lakeshore . Palaios , 17 : 123 – 133 .
   Web of Science ®Google Scholar
• Tucker , L. and Smith , M. P. 2004 . A multivariate taxonomic analysis of the Late Carboniferous vertebrate ichnofauna of Alveley, southern Shropshire, England . Palaeontology , 47 : 679 – 710 .
   Web of Science ®Google Scholar
• Van Allen , H. E. K. , Calder , J. H. and Hunt , A. P. 2005 . The trackway record of a tetrapod community in a walchian conifer forest from the Permo-Carboniferous of Nova Scotia . New Mexico Museum of Natural History and Science Bulletin , 30 : 322 – 332 .
   Google Scholar
• Voigt , S. 2005 . “ Die Tetrapodenichnofauna des kontinentalen Oberkarbon und Perm im Thüringer Wald—Ichnotaxonomie, Paläoökologie und Biostratigraphie ” . 179 Göttingen : Cuvillier .
   Google Scholar
• Voigt , S. , Hminna , A. , Saber , H. , Schneider , J. W. and Klein , H. 2010 . Tetrapod footprints from the uppermost level of the Permian Ikakern Formation (Argana basin, western High Atlas, Morocco) . Journal of African Earth Sciences , 57 ( 5 ) : 470 – 478 .
   Web of Science ®Google Scholar
• Voigt , S. , Lagnaoui , A. , Hminna , A. , Saber , H. and Schneider , J. W. 2011 . Revisional notes on the Permian tetrapod ichnofauna from the Tiddas Basin, central Morocco . Palaeogeography, Palaeoclimatology, Palaeoecology , 302 ( 3 ) : 474 – 483 .
   Web of Science ®Google Scholar
• Voigt , S. , Lucas , S. G. , Buchwitz , M. and Celeskey , M. D. 2013 . “ Robledopus Macdonaldi, a new kind of basal eureptile footprint from the Early Permian of New Mexico ” . Edited by: Lucas , S. G. , W. A. , Barrick , J. E. , Schneider , J. W. and Spielmann , J. A. Vol. 60 , 445 – 459 . New Mexico Museum of Natural History and Science Bulletin . The Carboniferous-Permian Transition
   Google Scholar
• Voigt , S. , Niedźwiedzki , G. , Raczyński , P. , Mastalerz , K. and Ptaszyński , T. 2012 . Early Permian tetrapod ichnofauna from the Intra-Sudetic Basin, SW Poland . Palaeogeography, Palaeoclimatology, Palaeoecology , 313–314 : 173 – 180 .
   Web of Science ®Google Scholar
• Voigt , S. , Saber , H. , Schneider , J. W. , Hmich , D. and Hminna , A. 2011 . Late Carboniferous-Early Permian tetrapod ichnofauna from the Khenifra Basin, central Morocco . Geobios , 44 ( 4 ) : 399 – 407 .
   Web of Science ®Google Scholar
• Voigt , S. , Small , B. and Sanders , F. 2005 . A diverse terrestrial ichnofauna from the Maroon Formation (Pennsylvanian-Permian), Colorado: Biostratigraphic and paleoecological significance . New Mexico Museum of Natural History and Science Bulletin , 30 : 342 – 351 .
   Google Scholar
• Woodworth , J. B. 1900 . Vertebrate footprints on Carboniferous shales of Plainville, Massachusetts . Geological Society of America Bulletin , 11 : 449 – 454 .
   Google Scholar