DiMichele, W.A., Eble, C.F., Pfefferkorn, H.W., Elrick, S.D., Nelson, W.J., Lucas, S.G. 2023. Kasimovian floristic change in tropical wetlands and the Middle-Late Pennsylvanian Boundary Event. In: Lucas, S.G., DiMichele, W.A., Opluštil, S., Wang, X. (eds.) Ice Ages, Climate Dynamics and Biotic Events: the Late Pennsylvanian World. Geological Society, London, Special Publications, 535, https://doi.org/10.1144/SP535-2022-228

Pfefferkorn, H.W. 2023. Pennsylvanian-age plant macrofossil biostratigraphy in tropical Pangaea: uniformitarianism, catastrophes and the ‘Cantabrian’ problem. In: Lucas, S.G., DiMichele, W.A., Opluštil, S., Wang, X. (eds.) Ice Ages, Climate Dynamics and Biotic Events: the Late Pennsylvanian World. Geological Society, London, Special Publications, 535, https://doi.org/10.1144/SP535-2022-282

Wang, J., Hilton, J., Pfefferkorn, H.W., Wang, S., Zhang, Y., Bek, J., Pšenička, J., Seyfullah, L.J., Dilcher, D., 2021. Ancient noeggerathialean reveals the seed plant sister group diversified alongside the primary seed plant radiation. Proceedings National Academy of Sciences (USA), v. 118, no. 11, http://doi.org/10.1073/pnas.2013442118

Wang, J., Pfefferkorn, H.W., Opluštil, S., Kerp, H., 2021. Permian “vegetational Pompeii”: A peat-forming in situ preserved forest from the Wuda Coalfield, Inner Mongolia, China – Introduction to a volume of detailed studies. Review of Palaeobotany and Palynology, v. 294, https://doi.org/10.1016/j.revpalbo.2021.104502

Pšenička, J., Wang, J., Bek, J., Pfefferkorn, H.W., Opluštil, S., Weiming Z., Votočková Frojdová, J., Libertín, M., 2021. A zygopterid fern with fertile and vegetative parts in anatomical and compression preservation from the earliest Permian of Inner Mongolia, China. Review of Palaeobotany and Palynology, v. 294, https://doi.org/10.1016/j.revpalbo.2021.104382

Schmitz, M.D., Pfefferkorn, H.W., Shen, S.-Z., Wang, J., 2020, A volcanic tuff near the Carboniferous-Permian boundary, Taiyuan Formation, North China: Radioisotopic dating and global correlation. Review of Palaeobotany and Palynology, v. 294, https://doi.org/10.1016/j.revpalbo.2020.104244

Opluštil, S., Wang, J., Pfefferkorn, H.W., Pšenička, J., Bek, J., Libertín, M., Wang, J., Wan, M., He, X., Yan, M., Wei, H., Votočková Frojdová, J., 2020. T⁰ Early Permian coal-forest preserved in situ in volcanic ash bed in the Wuda Coalfield, Inner Mongolia, China. Review of Palaeobotany and Palynology, v. 294, https://doi.org/10.1016/j.revpalbo.2020.104347

Liu, L., Pšenička, J., Bek, J., Wan, M., Pfefferkorn, H.W., Wang, J., 2020. A whole calamitacean plant Palaeostachya guanglongii from the Asselian (Permian) Taiyuan Formation in the Wuda Coalfield, Inner Mongolia, China. Review of Palaeobotany and Palynology, v. 294, https://doi.org/10.1016/j.revpalbo.2020.104245

Gastaldo, Robert A. & Bamford, Marion & Calder, John & Dimichele, William A. & Iannuzzi, Roberto & Jasper, André & Kerp, Hans & McLoughlin, Stephen & Opluštil, Stanislav & Pfefferkorn, Hermann W. & Rößler, Ronny & Wang, Jun.  2020.  The Non-analog Vegetation of the Late Paleozoic Icehouse–Hothouse and Their Coal-Forming Forested Environments. In: Martinetto, Edoardo & Tschopp, Emanuel & Gastaldo, Robert A. (eds.), Nature through Time, Virtual Field Trips through the Nature of the Past. Chapter 12. Springer Nature Schwitzerland, p. 291-316. DOI:  10.1007/978-3-030-35058-1_12.
[We are unable to provide any PDF of either the book chapters or the book to share at this time. You can consult Springer’s website for an individual chapter ($29.95) or acquire the e-book ($59.99). The hardcopy is available for $74.99. If we realize any profits from the sale of this 95 co-authored textbook, these funds will be contributed to various paleontological associations/societies. We thank you for your understanding.]

Gastaldo, Robert A. & Bamford, Marion & Calder, John & Dimichele, William A. & Iannuzzi, Roberto & Jasper, André & Kerp, Hans & McLoughlin, Stephen & Opluštil, Stanislav & Pfefferkorn, Hermann W. & Rößler, Ronny & Wang, Jun.  2020.  The Coal Farms of the Late Paleozoic. In: Martinetto, Edoardo & Tschopp, Emanuel & Gastaldo, Robert A. (eds.), Nature through Time, Virtual Field Trips through the Nature of the Past. Chapter 13. Springer Nature Schwitzerland, p. 317-343. DOI: 10.1007/978-3-030-35058-1_13.
[We are unable to provide any PDF of either the book chapters or the book to share at this time. You can consult Springer’s website for an individual chapter ($29.95) or acquire the e-book ($59.99). The hardcopy is available for $74.99. If we realize any profits from the sale of this 95 co-authored textbook, these funds will be contributed to various paleontological associations/societies. We thank you for your understanding.]

Pfefferkorn, H.W., Gastaldo, R.A., DiMichele, W.A.  2017.  Impact of an Icehouse climate interval on tropical vegetation and plant evolution.  Stratigraphy, v. 14, p. 365-376.  DOI: 10.29041/strat.14.1-4.365-376

Pfefferkorn, H.W., Wang, J.  2016.  Paleoecology of Noeggerathiales, an enigmatic, extinct plant group of Carboniferous and Permian times.  Palaeogeography, Palaeoclimatology, Palaeoecology, v. 448, p. 141-150 doi: 10.1016/j/palaeo.2015.11.022

Iannuzzi, R., Pfefferkorn, H.W., Alleman, V.  2015.  Paulophyton from the Carboniferous of Paracas, Peru: A rare but widespread fossil plant with unusual morphology.  Revista Brasileira de Paleontologia, v. 18, p. 369-378. doi: 10.4072/rbp.215.3.03

Iannuzzi, R., Pfefferkorn, H.W.  2014.  Re-interpreting Kegelidium lamegoi Dolianiti, a microsporangiate organ from the Poti Formation (late Visean), Parnaíba Basin, northeastern Brazil.  Communicações Geológicas (Laboratório Nacional de Geologia e Energia, Portugal), v. 101, Especial I, p. 451-453.

Wang, J., Wan, M., Pfefferkorn, H.W.  2014.  Aphlebia hvistendahliae sp. nov. from the early Permian Wuda Tuff Flora, Inner Mongolia.  Review of Palaeobotany and Palynology, v. 210, p. 69-76.

Wang, J., Kerp, H., Pfefferkorn, H.W.  2014.  The earliest occurrence of peltasperms in the basal Permian strata of the North China Block and the radiation of this group.  Geological Journal, v. 49, p. 129-142.  doi: 10.1002/gj.2503

Pfefferkorn, H.W., Alleman, V., Iannuzzi, R.  2014.  A greenhouse interval between icehouse times: Climate change, long-distance plant dispersal, and plate motion in the Mississippian (late Visean–earliest Serpukhovian) of Gondwana.  Gondwana Research, v.25, p. 1338-1347.  doi: 10.1016/j.gr.2013.08.022

Wang, J., Pfefferkorn, H.W., Feng, Z.  2014.  Noeggerathiales as coal-forming plants in Cathaysia: conclusions from an Early Permian vegetational Pompeii in Inner Mongolia.  Chinese Science Bulletin, v. 59, p. 2785-2792.  doi: 10.2007/s11434-014-0270-1

Wang, J., He, X.Z., Pfefferkorn, H.W., Wang, J.R.  2013.  Compaction rate of an early Permian volcanic tuff from Wuda coalfield, Inner Mongolia.  Acta Geologica Sinica – English Edition, v. 87(5), p. 1242-1249.

Wang, J., Pfefferkorn, H.W.  2013.  The Carboniferous-Permian transition on the North China microcontinent – Oceanic climate in the tropics.  International Journal of Coal Geology, v. 119, p. 106-113.

Wang, J., Pfefferkorn, H.W., Zhang, Y., Feng Z.  2012.  Permian vegetational Pompeii from Inner Mongolia and its implications for landscape paleoecology and paleobiogeography of Cathaysia.  Proceedings of the National Academy of Sciences (USA), v. 109, p. 4927-4932.

Wang, J., Pfefferkorn, H.W.  2011.  Plant life during the Carboniferous-Permian transition on the North China block.  In: Harper, J.A. (ed.), Geology of the Pennsylvanian-Permian in the Dunkard basin. Guidebook, 76^th Annual Field Conference of Pennsylvania Geologists, Washington, PA, p. 207-218.

Pfefferkorn, H.W.  2011.  Paleobotany and stratigraphy at the Carboniferous-Permian boundary in Central and Western Europe: A short review.  In: Harper, J.A. (ed.), Geology of the Pennsylvanian-Permian in the Dunkard basin. Guidebook, 76^th Annual Field Conference of Pennsylvania Geologists, Washington, PA, p. 200-206.

Falcon-Lang, H.J., Heckel, P.H., DiMichele, W.A., Blake, B.M., Jr., Esterday, C.R., Eble, C.F., Elrick, S., Gastaldo, R.A., Greb, S.F., Martino, R.L., Nelson, W.J., Pfefferkorn, H.W., Phillips, T.L., Roscoe, S.J.  2011.  No major stratigraphic gap exists near the Middle-Upper Pennsylvanian (Desmoinesian-Missourian) boundary in North America.  PALAIOS, v. 26(3), p. 125-139.
Falcon-Lang, H.J., Heckel, P.H., DiMichele, W.A., Blake, B.M., Jr., Esterday, C.R., Eble, C.F., Elrick, S., Gastaldo, R.A., Greb, S.F., Martino, R.L., Nelson, W.J., Pfefferkorn, H.W., Phillips, T.L., Roscoe, S.J.  2011.  Reply.  PALAIOS, v. 26(10), p. 671-671.

Leslie, A.B. & Pfefferkorn, H.W.  2010.  Fossil floras from the Emma Fiord Formation (Visean, Mississippian) of the Canadian Arctic Archipelago and their paleoenvironmental context.  Review of Palaeobotany and Palynology, v. 159, p. 195-203.

Wang, J. & Pfefferkorn, H.W.  2010.  Nystroemiaceae, a new family of Permian gymnosperms from China with an unusual combination of features.  Proceedings of the Royal Society B, v. 277, p. 301-309.

Wang, J., Labandeira, C.C., Zhang, G., Bek, J., & Pfefferkorn, H.W.   2009.  Permian Circulipuncturites discinisporis Labandeira, Wang, Zhang, Bek et Pfefferkorn gen. et spec. nov. from China, an ichnotaxon of a punch-and-sucking insect on noeggerathialean spores.  Review of Paleobotany and Palynology, v. 156, p. 277-282.

Wang, J., Pfefferkorn, H.W. & Bek, J.  2009.  Paratingia wudensis sp. nov., a whole noeggerathialean plant preserved in an air fall tuff of earliest Permian age (Inner Mongolia, China).  American Journal of Botany, v. 96, p. 1676-1689.

Pfefferkorn, H.W. & Jun Wang.  2009.  Stigmariopsis, Stigmaria asiatica, and the survival of the Sigillaria brardii-ichthyolepis group in the tropics of the late Pennsylvanian and Early Permian.  PALAEOWORLD, v. 18, p. 130-135.

Saja, D.B., Pfefferkorn, H.W. & S.P. Phipps.  2009.  Bathysiphon (Foraminiferida) at Pacheco Pass, California: a geopetal, paleocurrent, and paleobathymetric indicator in the Franciscan Complex.  PALAIOS, v. 24, p. 181-191.

Pfefferkorn, H.W. & V. Alleman.  2008.  A greenhouse time before the onset of an ice age.  BIOTEMPO (Lima, Peru), v. 8, p. 35-41.

Pfefferkorn, H.W.  2008.  Structural geology and stratigraphy of part of the southern Iberian pyrite-belt between Serpa and Mértola (Baixo Alentejo, Portugal) – an evaluation 40 years later. in: von Raumer, J. (ed.), Franz Lotze (1903-1971) – The doctoral thesis of his students in Spain and Portugal.  Serie Nova Terra (La Coruña, Spain), v. 36, p. 27-34.

Pfefferkorn, H.W., Gastaldo, R.A., DiMichele, W.A., & Phillips, T.L.  2008.  North American Late Carboniferous tropical floras as a far-field record of changing climate. In: Fielding, C.R., Frank, T.D., & Isbell, J.L. (eds.) Resolving the Late Paleozoic Gondwanan ice age in time and space. Geological Society of America, Special Paper 441, p. 305-316. doi: 10.1130/2008.2441(21).

Yang, Shu, Wang, Jun, & Pfefferkorn, H.W.  2008.  Marattia aganzhenensis sp. nov. from the Lower Jurassic Daxigou Formation of Lanzhou, Gansu, China.  International Journal of Plant Science, v. 169, p. 473-482.

Pfefferkorn, H.W. & Wang, J.  2007.  Early Permian coal-forming floras preserved as compressions from the Wuda District (Inner Mongolia, China).  International Journal of Coal Geology, v. 69, p. 90-102.

DiMichele, W.A., Phillips, T.L. & Pfefferkorn, H.W.  2006.  Paleoecology of Late Paleozoic pteridosperms from tropical Euramerica.  Journal of the Torrey Botanical Society, v. 133, p. 83-118.

Pfefferkorn, H.W.  2005.  Die Gründung der Münsterschen Forschungen zur Geologie und Paläontologie, 1963-1968 – Ein Rückblick [The beginnings of the scientific journal, Münsterschen Forschungen zur Geologie und Paläontologie“, 1963-1968, a retrospective. In German].  Münsterschen Forschungen zur Geologie und Paläontologie, v. 100, p. 1-5.

Iannuzzi, R., Pfefferkorn, H.W. & Rösler, O.  2006.  Reavaliação da flora da Formação Poti: Diplothmema gothanica (Dolianiti) Iannuzzi.  Revista Brasileira de Paleontologia, v. 9, p. 9-20.

Wang, J., Pfefferkorn, H.W., Xu, A. & Zhang, Y.  2005.  A note on the Permian megafossil plant biostratigraphy of China.  New Mexico Museum of Natural History and Science, Bulletin 30, p. 352-355.

Cressler, W.L. & Pfefferkorn, H.W.   2005.  A Late Devonian isoetalean lycopsid, Otzinachsonia beerboweri gen. et sp. nov. from north-central Pennsylvania, U.S.A.  American Journal of Botany, v. 92, p. 1131-1140.

DiMichele, W.A., Gastaldo, R.A., and Pfefferkorn, H.W.  2005.  Plant biodiversity partitioning in the late Carboniferous and early Permian and its implications for ecosystem assembly.  Proceedings of the California Academy of Sciences, v. 56, suppl. I, p. 32-49.

Wang J., Pfefferkorn, H.W., Feng, Zhou, and Shen Guanglong.  2004.  A new species of Discinites (Noeggerathiales) associated with a new species of Yuania from the Lower Permian of Inner Mongolia, China.  International Journal of Plant Science, v. 165, p. 1107-1119.

Pfefferkorn, H.W.  2004.  The complexity of mass extinctions.  Proceedings of the National Academy of Sciences (USA), v. 101(35), p. 12779-12780.

Pfefferkorn, H.W., LePage, B.A., Utting, J., Beauchamp, B.  2003.  Early Permian flora from the Canadian Arctic revisited. Permophiles, v. 43, p. 24-25.

Wang, Jun, Pfefferkorn, H.W., Sun, Bainian, & Liu, Lujun.  2003.  Discovery of organic connection of Chiropteris Kurr and Nystremia Halle from Early Permian of western Henan, China.  Chinese Science Bulletin, v. 48, p. 2248-2252.

Pfefferkorn, H.W.  2003.  Defining boundary stratotypes — Speciation, migration, and extinction.  Newsletter on Carboniferous Stratigraphy, v. 21, p. 20-22.

LePage, B.A., Beauchamp, B., Pfefferkorn, H.W. & Utting, J.  2003.  Late Early Permian plant fossils from the Canadian High Arctic: a rare paleoenvironmental/climatic window in northwest Pangea.  Palaeogeography, Palaeoclimatology, Palaeoecology, v. 191, p. 345-372.

Iannuzzi, R., Pfefferkorn, H.W.  2002.  A pre-glacial, warm-temperate floral belt in Gondwana (Late Visean, Early Carboniferous).  PALAIOS, v. 17, p. 571-590.

Englund, K.J., Wnuk, C., Gillespie, W.H., & Pfefferkorn, H.W.  2002.  A Pennsylvanian System stratotype.  in: Hills, L.V., Henderson, C.M., and Bamber, E.W. (eds.) Carboniferous and Permian of the World.  Proceedings of the XIV International Congress of Carboniferous-Permian.  Canadian Society of Petroleum Geologists, Memoir 19, p. 684-695.

Blake, B.M., Cross, A.T., Eble, C.F., Gillespie, W.H. & H.W. Pfefferkorn.  2002.   Selected plant megafossils from the Carboniferous of the Appalachian region, eastern United States:  Geographic and stratigraphic distribution.  in: Hills, L.V., Henderson, C.M., and Bamber, E.W. (eds.) Carboniferous and Permian of the World.  Proceedings of the XIV International Congress of Carboniferous-Permian.  Canadian Society of Petroleum Geologists, Memoir 19, p. 259-335.

Pfefferkorn, H.W., Archer, A.W. & Zodrow, E.L.  2001.  Modern tropical analogs for Carboniferous standing forests: Comparison of extinct Mesocalamites with extant Montrichardia.  Historical Biology, v. 15, p. 235-250.

DiMichele, W.A., Pfefferkorn, H.W. and Gastaldo, R.A.  2001.  Response of Late Carboniferous and Early Permian plant communities to climate change.  Annual Review of Earth and Planetary Sciences, v. 29, p. 461-487.

Fonjweng, G.T. & Pfefferkorn, H.W.  2001.  Storm-induced sediment dynamics in Delaware Bay tidal marshes.  Northeastern Geology & Environmental Science, v. 23, p. 12-19.

Goubet, P., Pfefferkorn, H.W. & W.H. Gillespie.  2000.  Neuralethopterids (Medullosan pteridosperms) from the Early Pennsylvanian of North America.  PaleoBios, v. 20, p. 11-37.

LePage, B.A. & Pfefferkorn, H.W.  2000.  Did ground cover change over geologic time? in: Gastaldo, R.A. & DiMichele, W.A. (eds.), Phanerozoic terrestrial ecosystems.  The Paleontological Society Papers, v. 6, p. 171-182.

Pfefferkorn, H.W., Gastaldo, R.A. & DiMichele, W.A.  2000.  Ecological stability during the Late Paleozoic cold interval.  in: Gastaldo, R.A. & DiMichele, W.A. (eds.), Phanerozoic terrestrial ecosystems.  The Paleontological Society Papers, v. 6, p. 63-78.

Pfefferkorn, H.W.  1999.  Recuperation after mass extinctions.  Proceedings of the National Academy of Sciences (USA), v. 96(24), p. 13597-13599.

Iannuzzi, R., Pfefferkorn, H.W., Diaz-Martinez, E., Alleman, V., & Suarez-Soruco, R.  1998.  La flora Eocarbonifera de la Formacion Siripaca (Grupo Ambo, Bolivia) y su correlacion con la flora de Paracas (Grupo Ambo, Peru).  Boletin de la Sociedad Geológica del Perú, v. 88, p. 39-51.

Wagner, T. & H.W. Pfefferkorn.  1997.  Tropical peat occurrences in the Orinoco Delta: Preliminary assessment and comparison to Carboniferous examples.  Proceedings XIII International Congress on Carboniferous and Permian, v. 2, p. 161-168.

Pfefferkorn, H.W.  1997.  Paleoclimates of Peru during the Late Paleozoic - Fossil plants and moving continents.  Sociedad Geológica del Perú, Publicación Especial No. 1, p. 671-673.

Iannuzzi, R., Pfefferkorn, H.W., Díaz, E., Alleman, V., & R. Suárez-Soruco.  1997.  Una flora eocarbonífera de la Formación Siripaca, Grupo Ambo, Bolivia y su correlacion con las floras Peruanas (Flora Paracas) (An Early Carboniferous flora from the Siripaca Formation, Ambo Group, Bolivia, and its correlation with the Paracas flora.  Sociedad Geológica del Perú, Publicación Especial No. 1, p. 599-602.

Alleman, V. & Pfefferkorn, H.W.  1997.  Diversidad y reconstrucción de los licópodos Carboníferos de Paracas (Diversity and reconstruction of Carboniferous lycopods of Paracas).  Sociedad Geológica del Perú, Publicación Especial No. 1, p. 581-584.

DiMichele, W.A., H.W. Pfefferkorn & T.L. Phillips.  1996.  Persistence of Late Carboniferous tropical vegetation during glacially driven climatic and sea-level fluctuations.  Palaeogeography, Palaeoclimatology, Palaeoecology, v. 125, p. 105-128.

Gastaldo, R.A., DiMichele, W.A. & H.W. Pfefferkorn.  1996.  Out of the Icehouse into the Greenhouse: A late Paleozoic analog for modern global vegetational change.  GSA Today, v. 6, no. 10 (October 1996), p. 1-7.

Pfefferkorn, H.W.  1996.  Paleobotany and the evolution of climate.  Actas Academia Nacional de Ciencia y Tecnologia of Peru, v. 3 (1995), no. 2, p. 83-94.

Wnuk, C. & H.W. Pfefferkorn.  1996.  Foreword: The value of paleo-phytogeography. [Introduction to special issue on "Paleozoic Phytogeography”] Review of Palaeobotany and Palynology, v. 90, p. 1-3.

Alleman, V., Pfefferkorn, H.W. & D.M. Erwin.  1995.  Los contextos paleoecológicos variados de las floras Carboníferas de Paracas (Ica, Perú).  Boletin Sociedad Geológica del Perú, v. 84, p. 37-42.

Pfefferkorn, H.W.  1995.  We are temperate climate chauvinists.  PALAIOS, v. 10, p. 389- 391 (Editorial).

Gastaldo, R.A., Pfefferkorn, H.W. & W.A. DiMichele.  1995.  Taphonomic and sedimentologic characterization of "roof-shale" floras.  Geological Society of America, Memoir 185, p. 341-352.

Gutierrez, P.R., Pfefferkorn, H.W. & Césari, S.N.  1994.  Velizia inconstans CESARI & HÜNIKEN (Gymnospermae) en el Formacion Cerro Agua Negra (Paleozoico Superior), San Juan, Republica Argentina.  AMEGHINIANA, v. 31, p. 87-91.

Pfefferkorn, H.W., Belz, G., Dinnebier, R.E., Kraatz, R. & H.R. Linke.  1994.  PALBOTEC, ein Mikrocomputer-Programm zur Erleichterung der Fossilbestimmung (PALBOTEC, computer-aided identification of fossils with microcomputers).  Neues Jahrbuch fuer Geologie und Palaeontologie, Monatshefte 1994, Heft 8, p. 501-516.

Erwin, D.M., Pfefferkorn, H.W. & V. Alleman.  1994.  Early seed plants in the Southern Hemisphere: I. Associated ovulate and microsporangiate organs from the Carboniferous of Peru.  Review of Palaeobotany and Palynology, v. 80, p. 19-38.

Alleman, V. & H.W. Pfefferkorn.  1991.  Bosques en posicion de vida en el Carbonifero de Paracas.  VII Congreso Peruano de Geologia, Lima, p. 395-398.

Alleman, V. & H.W. Pfefferkorn.  1988.  Licopodos de Paracas: Significacion geologica y paleo-climatologica.  Boletin Sociedad Geológica del Perú, v. 78, p. 131-136.

Flick, H., H.W. Pfefferkorn & J. Schmidt.  1988.  Presence of land-plants on a volcanic island in a Devonian sea (Rhenish Mountains, West Germany).  Review of Palaeobotany and Palynology, v. 56, p. 177-181.

Pfefferkorn, H.W., Fuchs, K., Hecht, C., Hofmann, C., Rabold, J.M. & T. Wagner.  1988.  Recent geology and taphonomy of the Orinoco Delta - overview and field observations.  Heidelberger Geowissenschaftliche Abhandlungen, v. 20, p. 21-56.

Mahler, J.P. & H.W. Pfefferkorn.  1988.  The influence of the University of Heidelberg on the development of geology in North America between 1860 and 1913.  Earth Sciences History, v. 7, p. 33-43.

Martins, U.P. & H.W. Pfefferkorn.  1988.  Genetic interpretation of a Lower Triassic paleosol complex based on soil micromorphology.  Palaeogeography, Palaeoclimatology, Palaeoecology, v. 64, p. 1-14.

Wnuk, C. & Pfefferkorn, H.W.  1987.  A Pennsylvanian-age terrestrial storm deposit: using plant fossils to characterize the history and process of sediment accumulation.  Journal of Sedimentary Petrology, v. 57, p. 212-221.

Pfefferkorn, H.W.  Fossilien und Paloekologie.  1986.  Heidelberger Geowissenschaftliche Abhandlungen, v. 6, p. 385-390.

Englund, J.E., W.H. Gillespie, P.L. Johnson & H.W. Pfefferkorn.  1986.  Depositional model for Upper Mississippian and Lower Pennsylvanian rocks of Southwestern Virginia.  Virginia Tech Department of Geological Sciences, Memoir 3.  Lowry Volume, p. 37-45.

Gillespie, W.H. & H.W. Pfefferkorn. 1986.   Plant fossils of the New River Gorge, West Virginia.  Proceedings West Virginia Academy of Science (1984), Papers of the 59th Annual Session, v. 56, p. 124-135.

Gillespie, W.H. & H.W. Pfefferkorn.  1986.  Taeniopterid lamina on Phasmatocycas megasporophylls (Cycadales) from the Lower Permian of Kansas, U.S.A.  Review of Paleobotany and Palynology, v. 49, p. 99-116.

Pfefferkorn, H.W., W.H. Gillespie, D.A. Resnik & M.H. Scheihing.  1985.  Reconstruction and Architecture of Medullosan Pteridosperms (Pennsylvanian).  The Mosasaur, v. 2 (1984), p. 1-8.

Wnuk, C. & H.W. Pfefferkorn.  1984.  The life habits and paleoecology of middle Pennsylvanian Medullosan Pteridosperms based on an in situ assemblage from the Bernice Basin (Sullivan County, Pennsylvania, U.S.A.).  Review of Paleobotany and Palynology, v. 41, p. 329-351.

Scheihing, M.H. & H.W. Pfefferkorn.  1984.  The taphonomy of land plants in the Orinoco Delta: A model for the incorporation of plant parts in clastic sediments of Late Carboniferous age of Euramerica.  Review of Palaeobotany and Palynology, v. 41, p. 205-240.

Pfefferkorn, H.W. & M.C. Thomson.  1982.  Changes in dominance patterns in Upper Carboniferous plant fossil assemblages.  Geology, v. 10, p. 641-644.

Pfefferkorn, H.W. & W.H. Gillespie.  1982.  Plant megafossils near the Mississippian-Pennsylvanian boundary in the Pennsylvanian System stratotype, West Virginia-Virginia.  in: Ramsbottom, W.H.C. et al.  (eds.).  Biostratigraphic data for a Mid-Carboniferous boundary.  Subcommission on Carboniferous Stratigraphy, Leeds, U.K., 128-133.

Pfefferkorn, H.W. & W.H. Gillespie.  1981.  Biostratigraphic significance of plant megafossils near the Mississippian-Pennsylvanian boundary in southern West Virginia and southwestern Virginia.  in: Roberts, T.G. (ed.)  GSA Cincinnati '81, Field Trip Guidebooks, v. 1, 159-164.

Pfefferkorn, H.W. & W.H. Gillespie.  1980.  A bibliography of compression-impression floras of Pennsylvanian age in North America 1821 to 1977.  Schlotheimiana, International Working Group on Carboniferous and Permian Compression Floras, Philadelphia, PA, 44 pp.

Pfefferkorn, H.W. & W.H. Gillespie.  1980.  Biostratigraphy and biogeography of plant compression fossils in the Pennsylvanian of North America.  in: Dilcher, D.L. & T.N. Taylor (eds.).  Biostratigraphy of fossil plants-Successional and paleoecological analyses.  Dowden, Hutchinson & Ross, Stroudsburg, PA, USA, 93-118.  [invited symposium contribution]

Pfefferkorn, H.W.  1980.  A note on the term "upland flora".  Review of Palaeobotany and Palynology, v. 30, p. 157-158.

Scheihing, M.H. & H.W. Pfefferkorn.  1980.  Morphologic variation in Alethopteris (pteridosperms, Carboniferous) from St. Clair, Pennsylvania, USA.  Palaeontographica B, v. 172, p. 1-9.

Pfefferkorn, H.W. & D.A. Resnik.  1980.  The occurrence of Sphenopteris germanica (pteridosperm, Autunian, Lower Permian) in North America.  Journal of Paleontology, v. 54, p. 81-84.

Pfefferkorn, H.W.  1979.  High diversity and stratigraphic age of the Mazon Creek Flora.  in: Nitecki, M.H. (ed.)  Mazon Creek Fossils.  Academic Press, New York, p. 129-142.  [invited symposium contribution]

Gillespie, W.H. & H.W. Pfefferkorn.  1979.  Distribution of commonly occurring plant megafossils in the proposed Pennsylvanian System stratotype.  in:  Englund, K.J. et al. (eds.)  Proposed Pennsylvanian System stratotype Virginia and West Virginia.  9th International Congress of Carboniferous Stratigraphy and Geology, American Geol. Inst. Selected Guidebook Series, No. 1, p. 87-96.

Pfefferkorn, H.W.  1978.  Revision der Sphenopteriden Discopteris karwinensis STUR, Discopteris  vuellersi STUR und der Gattung Discopteris STUR.  Argumenta Palaeobotanica 5, p. 167-193.

Gillespie, W.H., Clendening, J.A. & H.W. Pfefferkorn. 1978. Plant fossils of West Virginia and adjacent areas.  West Virginia Geological Survey, Morgantown, WV, Educational Series ED-3a, 172 pp.

Pfefferkorn, H.W.  1977.  Plant megafossils in Venezuela and their use in geology.  V Congreso Geologico Venezolano, Memoria 1, p. 407-414.

Leary, R.L. & H.W. Pfefferkorn.  1977.  An Early Pennsylvanian flora with Megalopteris and Noeggerathiales from west-central Illinois.  Illinois State Geological Survey Circular 500, 77 pp.

Pfefferkorn, H.W. & W.H. Gillespie.  1977.  Pennsylvanian plant fossils.  in: Englund, K.J. et al.  A field guide to proposed Pennsylvanian System stratotype West Virginia.  AAPG/SEPM Convention Washington, D.C., p. 21-26.

Pfefferkorn, H.W.  1976.  Pennsylvania tree fern compressions Caulopteris, Megaphyton, and Artisophyton gen. nov. in Illinois.  Illinois State Geological Survey Circular 492, 31 pp.

Gillespie, W.H. & H.W. Pfefferkorn.  1976.  Plant fossils in early and middle parts of the proposed Pennsylvanian System stratotype in West Virginia.  Geological Society of America, Northeast-Southeast Sections Meeting 1976, Fieldtrip Guidebook 3, p. 6-10.

Pfefferkorn, H.W.  1976.  Reconstruction and interpretation of Brittsia problematica D. WHITE (fern, Pennsylvanian).  Fieldiana Geology, v. 33(17), p. 315-322.

Pfefferkorn, H.W., Mustafa, H. & H. Hass.  1975.  Quantitative Charakterisierung ober-karboner Abdruckfloren (Quantitative characterization of compression-impression floras of Upper Carboniferous age):  Neues Jahrbuch Geologie Palaeontologie, Abhandlungen 150, p. 253-269.

Remy, W., R. Remy, H.W. Pfefferkorn, W. Volkheimer & E. Rabe.  1975.  Neueinstufung der Bocas-Folge (Bucaramanga, Kolumbien) in den unteren Jura anhand einer Phlebopteris-branneri - und Classopollis-Flora (The Lower Jurassic age of the Bocas Formation [Bucaramanga, Columbia] based on the occurrence of Phlebopteris branneri and Classopollis): Argumenta Palaeobotanica 4, p. 55-77.

Pfefferkorn, H.W. & F. Schaarschmidt.  1975.  Paläobotanische und palynologische Sammlungen [Paleobotanical and palynological collections in central and northern Europe. In German]:  Courier Forschungsinstitut Senckenberg, v. 13, p. 29-69.

Phillips, T.L., Pfefferkorn, H.W. & R.A. Peppers.  1973.  Development of paleobotany in the Illinois Basin.  Illinois State Geological Survey Circular 480, 86 pp.

Pfefferkorn, H.W. 1973.  Kankakeea gen. nov., buds for vegetative reproduction in Carboniferous ferns.  Palaeontologische Zeitschrift, v. 47, p. 143-151.

Pfefferkorn, H.W.  1972.  Regionale Geologie in einem Teil des Pyritgürtels von Sued-Portugal und Sued-Spanien (Regional geology in part of the pyrite belt in southern Portugal and Spain): Muenstersche Forschungen zur Geologie und Palaeontologie, v. 24, p. 109-125.

Pfefferkorn, H.W.  1972.  Distribution of Stigmaria wedingtonensis (Lycopsida) in the Chesterian (Upper Mississippian) of North America.  American Midland Naturalist, v. 88, p. 225-231.

Pfefferkorn, H.W., Peppers, R.A. & T.L. Phillips.  1971.  Some fern-like fructifications and their spores from the Mazon Creek compression flora of Illinois (Pennsylvanian).  Illinois State Geological Survey Circular 463, 29 pp.

Pfefferkorn, H.W.  1971.  Note on Conostichus broadheadi LESQUEREUX (trace fossil, Pennsylvanian).  Journal of Paleontology, v. 45, p. 888-892.

Gluskoter, H.J., L.H. Pierard & H.W. Pfefferkorn.  1970.  Apatite petrifactions in Pennsylvanian black shales of Illinois.  Journal of Sedimentary Petrology, v. 40, p. 1363-1366.

Peppers, R.A. & H.W. Pfefferkorn.  1970.    A comparison of the floras of the Colchester (No. 2) Coal and Francis Creek Shale.  Illinois State Geological Survey Field Guidebook 8, p. 61-74.

Pfefferkorn, H.W.  1968.  Geologie des Gebietes zwischen Serpa und Mertola (Baixo Alentejo, Portugal)).  Muenstersche Forschungen zur Geologie und Palaeontologie, v. 9, p. 1-143.

Pfefferkorn, H.W.  1968.  Geologische Gliederung und Faziesverhaeltnisse des Gebietes zwischen Serpa und Mertola, Sued-Portugal - Vorlaeufige Mitteilung (Tectono-stratigraphic units in the area between Serpa and Mertola, southern Portugal - Preliminary results). Neues Jahrbuch Geologie Palaeontologie, Monatshefte 1968, p. 89-99.

Pfefferkorn, H.W.  1967.  Radialstrahlige Quarzkugeln aus einem Barytgang in Portugal (Radially structured quartz spheres from a baryte vein in Portugal).  Der Aufschluss, v. 18, p. 205-208.

Schaefer, G. & H. Pfefferkorn. 1964.  Schwarze Quarze aus dem Massenkalk von Iserlohn (Black quartz crystals from Devonian reef limestone at Iserlohn, Germany).  Der Aufschluss, v. 15, p. 242-243.

Koltermann, M., Rauschenfels, E. & H. Pfefferkorn.  1964.  Das thermische Verhalten von Sepiolith (The thermal reaction of Sepiolite).  Tonindustrie-Zeitung, v. 88, p. 132-134.

Stracke, O., Pfefferkorn, H. & H. Wahn.  1960.  Feststellung des Verunreinigungsgrades des Aasees in Muenster durch Untersuchung seines Planktons (Determination of pollution of the Aasee lake in Muenster, Germany, based on its plankton).  Natur und Heimat, v.  20, p.  1-7.