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Park Paleo 6(1) National Park Service U.S. Department of the Interior Volume 6, Number 1 Park Paleontology Winter 2002 Geologic Resources Division, Paleontology Program A New Specimen of Stagonolepis (Aetosauria: Crurotarsi) from Petrified Forest National Park, Arizona Table of Contents A New Specimen of Stagonolepis (Aetosauria: Crurotarsi) from Petrified Forest William G. Parker National Park, Arizona ................................. 1 Department of Resource Management Palynology of the Aquicludes of Fossil Gulch, Petrified Forest National Park isolated aetosaur elements previously as- P.O. Box 2217 Hagerman Fossils Beds National Monument, signed to S. wellesi and to critically analyze Hagerman, Idaho ......................................... 2 Petrified Forest, AZ 86028 past artistic reconstructions for this animal. Emergency Fossil Salvage Collection of the Additional Reading Titanothere Graveyards, Badlands National Recent fieldwork in conjunction with an Heckert, A.P. and S.G. Lucas. 1999. A new Park: A tragic story with a happy ending ..... 3 inventory of paleontological resources in aetosaur (Reptilia: Archosauria) from the Upper Petrified Forest National Park (PFNP) has Triassic of Texas and the phylogeny, A Newly Discovered Catfish Skull from the resulted in the discovery of a possibly com- biochronology, and paleobiogeography of Smithsonian Horse Quarry, Hagerman Fossil plete skeleton of the aetosaur, Stagonolepis aetosaurs. Journal of Vertebrate Paleontology Beds National Monument ............................ 4 19(1):50-68. wellesi. Aetosaurs were large, herbivorous, Preliminary Report on Recent Discoveries heavily armored reptiles common in late during a Paleontological Survey in Long, R. A., and K. L. Ballew, 1985. Aetosaur Triassic terrestrial sediments. They comprise AniakchakNational Monument and Preserve – dermal armor from the Late Triassic of south- a major portion of the faunas of the Chinle 2001 ............................................................ 5 Formation of Petrified Forest National Park. western North America, with special reference to material from the Chinle Formation of Petrified NPS Paleontologists Participate in Discovery Preliminary investigation of the specimen Forest National Park. Museum of Northern Channel Show: Walking with Prehistoric suggests that close to 100 individual elements Arizona Bulletin 54:45-68. Beasts .......................................................... 5 are present, mostly armor plates. Numerous non-armor elements are present as well Long, R.A. and P.A. Murry. 1995. Late Triassic Remains of the Last of the Sauropod Dino- saurs Excavated at Big Bend National Park ... 6 including a portion of the pelvis, several (Carnian and Norian) tetrapods from the south- western United States. Bulletin of the New vertebrae, and a few ribs. The skeleton is Museum of Geology , South Dakota School Mexico Museum of Natural History and Science about 2.5 meters in length and was recovered of Mines and Technology Mounts Skeleton of 4:1-254. from mudstone layers just below the Sonsela Archaeotherium for Badlands National Park 7 Member of the Chinle Formation near Battleship Rock in the southern end of the Walker, A.D. 1961. Triassic reptiles from the Summary – Survey of Fossils in Parks ......... 10 Park. Elgin area: Stagonolepis, Dasygnathus, and their allies. Philosophical Transactions of the Royal Florissant Fossil Beds National Monument This new specimen is of importance due to Society of London, Series B 248:103-204. Particpates in Colorado Digitization Project10 the fact that associated skeletons, including aetosaurs, are very rare in Chinle sediments. Only one other relatively complete (more than 50% of elements present) aetosaur skeleton, Desmatosuchus haplocerus, has been recovered to date from Arizona. Correlative strata in Texas have produced a second Desmatosuchus specimen as well as the type specimen of Stagonolepis wellesi. While a large amount of associated aetosaur material has been recovered from other sites in the southwestern United States, these four speci- mens, along with another, Typothorax coccinarum from New Mexico, constitute the only relatively complete aetosaur skeletons known to date from North America. As a result of the lack of whole specimens, reconstruction of these animals has mainly been from isolated elements. This specimen will allow for deterministic comparisons with Stagonolepis wellesi reconstruction by Douglas Henderson from Dawn of the Dinosaurs (Long, Houk and Henderson, 1998) Park Paleontology 1 Palynology of the Aquicludes of Fossil Gulch, Hagerman Fossils Beds National Monu- ment, Hagerman, Idaho Eddie B. Robertson Reinhardt College, Waleska, GA 30183 Initial results of an evaluation of the pollen and spore microflora entrapped within the shales of the aquicludes associated with the famous Fossil Gulch at the Hagerman Fossil Beds National Monument, Hagerman, Idaho. Indicates a diversity of plant types. Fossil Gulch is best known for the location of the quarry that produced over 200 individuals of the Hagerman horse, Equus simplicidens,a late Pliocene (3.5 million years before present) zebra-like species, extensively quar- ried from the locality since the 1930s. The shales of the aquicludes are within the late The dark bands in the middle of the picture are aquicludes or pond deposits. They are in the Glenns Ferry Pliocene (early Blancan) Glenns Ferry For- Formation found in Hagerman Fossil Beds National Monument. mation and appear to represent a locally unique sedimentary environment. The sedi- ments of the Glenns Ferry Formation sampled are exposed on the west bank of the Snake River (GPS N 42° 49.406’, W 114° 56.192’). Five samples were taken from shales of the aquicludes (elevation 3100’) located approxi- mately 200 feet below the Horse Quarry (elevation 3300’). The interest in the pollen and spore content of the sediments is inter- esting in that it sheds some light on the char- acter of the local flora at the time contempo- rary with the Hagerman Horse (Equus simplicidens). The sediments of aquicludes are not the sediments within which the verte- Fir pollen, Abies, recovered from the aquicludes at Pollen grain of the water lily, Nuphar. brates were entombed. Hagerman Fossil Beds National Monument. The data was compiled for each of the five Additional Reading samples collected in the preliminary investi- Leopold, E.B. and V.C. Wright. 1985. Pollen gation. The analysis looked at the composite profiles of the Plio-Pleistocene transition in the flora as if it was one sample. The presence of Snake River Plain, Idaho. pp. 323-348 in C.J. the various diatoms, Pediastrum, and other Smiley (ed.) Late Cenozoic History of the Pacific Fossil Pollen and algal forms, added to the recovery of water Northwest. American Association for the Ad- lily pollen, tells us the sediments were from vancement of Science, Pacific Division, San Spores clear, cool, oligotrophic ponds. The ponds Francisco. were surrounded by high grass prairie or meadow. Surprisingly, only a few grains of The study of fossil pollen and spores is called sage (Artemesia) and ragweed (Ambrosia) palynology. Most pollen found as fossils has been transported by wind rather than by insects. The were recovered. Some of the expected ripar- pollen of coniferous trees such as pine and spruce ian (river corridor) hardwood species were are common examples of wind-dispersed pollen. found including oaks (Quercoidites), holly This pollen “rain” often includes the pollen from (Illexopollenite), willow (Salixopollenites), many different types of plants. When deposited in a poplar (Inaperturopollenites), and hemlock pond or a low oxygen environment the different (Tsugaepollenites). The recovery of fir types of pollen will be preserved. The relative (Abietineaepollenites), pine (Pinuspollenites), abundance of each pollen type provides an indica- and spruce (Piceapollenites) indicate airborne tion of the relative abundance of different types of and water borne input from the surrounding plants in the area. After preparing the samples, coniferous forest. palynologists collect a subsample and count the number of grains of each type of pollen. Changes The overall impression is that the primary in the proportion of different types of pollen and community associated with the formation of spores through the stratigraphic sequence is the aquicludes was an upland wet meadow presented in a pollen diagram. The diagram cab provide information about changes in the environ- surrounding biogenically (beaver) or geologi- ment. cally (lava flow) created oligotrophic ponds. 2 Park Paleontology Emergency Fossil Salvage Collection of the Titanothere Graveyards, Badlands National Park: A tragic story with a happy ending Rachael C. Benton Badlands National Park P.O. Box 6 Interior, SD 57750-0006 Brontotheres (Titanotheres), the first bad- lands fossils to be described, are considered the largest and most impressive of the early mammals preserved at Badlands National Park. These creatures were about the size of an Indian elephant and had huge blunt paired horns on their snouts. The South Unit at Badlands contains many of the historic collecting and research areas within the park, dating back to scientific surveys in the late 1800’s. On October 26, 1999, a park ranger discov- ered recent illegal diggings at the remote Titanothere Graveyard locality within the South Unit at Badlands National Park. Fol- low-up surveys documented over 18 poach- ing sites within the graveyards. The poachers were never caught. Park staff have created
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