|Fossil specimen of Calamites from University of Illinois|
Research begins with detailed discussions between the artist and scientist. The scientist provides the artist with: information concerning the age and locality of the fossil material; a list of the organisms needing to be included in the scene; his or her vision of the particular landscape to be reconstructed; reference materials such as specimens, photographs, scientific descriptions, relevant publications, and other background material; and information regarding the extinct organisms' closest living relatives. Discussions and critiques continue throughout the entire reconstruction process.
Study area for this reconstruction
Marshland edge or shallow water (lycopods)
Epiphytes and vines
|Ankyropteris by Mary Parrish, under the direction of Tom Phillips|
The scientist provides the fossil material for the artist to use to reconstruct the individual organisms to be reconstructed. This process can be extremely time consuming, particularly if the organism has never before been reconstructed, or the scientist is reinterpreting previously reconstructed organisms. Most fossil remains are fragmentary, and usually a great deal of research must be done before a whole organism is understood well enough to be added to the scene.
Scientists must also determine the geomorphology, sedimentological structure, and other geological and environmental aspects of the environment that are represented in the illustration.
The research phase of the illustration usually accounts for at least 70% of the total time spent on a well done reconstruction.
|Some of the fossils used in this reconstruction|
Fossil coal ball specimen with coal ball acetate peels from University of Illinois
Coal balls are concretions made largely of calcium carbonate which precipitated in ancient Carboniferous peat beds, thus preserving much anatomical structure of the original plants in the coal swamps. Coal balls are usually found intermittently in coal seams, to the dismay of coal miners and the delight of paleobotanists. Occasionally, as with the material pertaining to this reconstruction, they are found in outcrops of streambeds. Though difficult for a layperson to decipher, the data represented in this reconstruction was obtained primarily from the scientists’ studies of the delicate structures preserved in coal ball peels. Coal ball peels are prepared by slicing a coal ball with a lapidary saw, etching the cut and smoothed surface with hydrochloric acid, and applying a sheet of cellulose acetate to the etched surface with acetone which embeds the fossil cell walls to the cellulose acetate. When dry, the cellulose acetate is pulled from the coal ball and the peel is ready for study.
Fossil specimens of Seed ferns from University of Illinois with sketch of seed fern thicket by Mary Parrish
|Fossil specimens of tree ferns from University of Illinois with sketch by Mary Parrish
|Fossil specimens and model of lycopods from University of Illinois with sketch of trunk by Mary Parrish|
|The scientist also provides related references so the artist can study previously published reconstructions and descriptions of the organisms. Sometimes public libraries, the internet, or a museum will have useful information about the subject matter as well.|
Selected bibliography used for the reconstruction of the Carboniferous peat swamp
Eggert, D. A. 1959. Studies of Paleozoic Ferns, the morphology, anatomy and taxonomy of Ankyropteris glabra, American Journal of Botany, 46:510-520
Eggert, D. A. 1963. Studies of Paleozoic Ferns: The frond of Ankyropteris glabra, American Journal of Botany 50:379-387
Eggert, D. A., and Taylor, T. N. 1966. Studies in Paleozoic Ferns: On the genus Tedelea gen. nov. Palaeontographica 118B:52-73
Galtier, J., and Scott, A. C. 1979. Studies of Paleozoic Ferns: On the genus Corynepteris, a redescription of the type and some other European species, Palaeontographica B 170, 81-125
Delevoryas, T., and Morgan, J. 1954. Observations on petiolar branching and foliage of an American Botryopteris. American Midland Naturalist 52:374-387
Phillips, T. L., Avcin, M. J., and Berggren, D. 1976. Fossil Peat of the Illinois Basin: A guide to the study of coal balls of Pennsylvanian Age, Illinois State Geological Survey
Phillips, T. L., and Galtier, J. 2005. Evolutionary and ecological perspectives of Late Paleozoic ferns Part I. Zygopteridales, Review of Palaeobotany and Palynology 135:165-203
Phillips, T. L., and Andres, H. N. 1968. Biscalitheca (Coenopteridales) from the Upper Pennsylvanian of Illinois. Palaeontology 11, 103-115
Stewart, W. N. and Rothwell, G.W. 1993. Paleobotany and the Evolution of Plants. Cambridge University Press
Stidd, B. M. 1974. Evolutionary trends in the Marattiales, Annals of the Missouri Botanical Gardens, 61(2):388-407
Stidd, B. M. 1971. Morphology and anatomy of the frond of Psaronius, Palaeontographica 134 B: 87-123
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