Skip to main content Accessibility help

Like father, like son? Not amongst the eurypterids (Chelicerata) from Beartooth Butte, Wyoming

  • O. Erik Tetlie (a1)


The eurypterid Strobilopterus princetonii from the Lower Devonian Beartooth Butte Formation of Wyoming is redescribed, and previously unknown morphological features, including shape and position of eyes and ocelli are identified, and the prosomal appendages are described in more detail. The monotypic Erieopterus latus, based on a much smaller specimen from the same locality, shares a large number of characters with S. princetonii, and must be interpreted as belonging to the genus Strobilopterus. It is here interpreted as a juvenile S. princetonii, but exhibits extreme ontogenetic variation in the morphology of the swimming leg. The other monotypic eurypterid from the locality, Dorfopterus angusticollis, remains mysterious. It might be a S. princetonii telson, but evidence is inconclusive. The name of the Devonian eurypterid genus Syntomopterus is preoccupied for a beetle (Coleoptera: Insecta) and the replacement name Syntomopterella is proposed. The phylogenetic position of S. princetonii is problematic since it lacks unequivocal synapomorphies with other eurypterids, but the genus is showing more similarities to Syntomopterella, Erieopterus and Buffalopterus than it does to Dolichopterus, contrary to earlier suggestions.



Hide All
Agassiz, L. 1839. Fishes of the Upper Ludlow rock. p. 605607. In Murchison, R. I. (ed.) The Silurian System, Pt. 1, Founded on geological researches in the counties of Solop, Hereford, Radnor, montgomery, Caermarthen, Brecon, Pembroke, Monmouth, Gloucester, Worchester, and Stafford: with descriptions of the coal-fields and overlying formations. London, J. Murray. 768 p.
Agassiz, L. 1844. Monographie des poissons fossiles du Vieux Gres Rouge, ou Systeme Devonien (Old Red Sandstone) des Iles Britanniques et de Russie. Neufchatel, folio, 171 p.
Bode, A. 1953. Die Insektenfauna des Ostniedersächsischen Oberen Lias. Palaeontographica, A103(1-4):1375.
Braddy, S. J. 1996. The Paleobiology of the Eurypterida. Unpublished , , 505 p.
Braddy, S. J. and Dunlop, J. A. 1997. The functional morphology of mating in the Silurian eurypterid, Baltoeurypterus tetragonophthalmus (Fischer, 1839). Zoological Journal of the Linnean Society, 121:435461.
Bryant, W. L. 1932. Lower Devonian fishes of Beartooth Butte, Wyoming. American Philosophical Society Proceedings, 71:225254.
Bryant, W. L. 1933. The fish fauna of Beartooth Butte, Wyoming. Pt. I. American Philosophical Society Proceedings, 72:285314.
Bryant, W. L. 1934. The fish fauna of Beartooth Butte, Wyoming: Parts II and III. American Philosophical Society Proceedings, 73:127162.
Bryant, W. L. 1935. Cryptaspis and other Lower Devonian fossil fishes from Beartooth Butte Formation, Wyoming. American Philosophical Society Proceedings, 75:111128.
Burmeister, H. 1843. Die Organisation der Trilobiten, aus ihren lebenden Verwandten entwickelt; nebst einer systematischen Uebersicht aller zeither beschriebenen Arten. G. Reimer, Berlin, 148 pp.
Caster, K. E. and Kjellesvig-Waering, E. N. 1956. Some notes on the genus Dolichopterus Hall. Journal of Paleontology, 30(1):1928.
Clarke, J. M. and Ruedemann, R. 1912. The Eurypterida of New York. New York State Museum Memoir, 14, 439 p.
Denison, R. H. 1966. Cardipeltis—An Early Devonian agnathan of the order Heterostraci. Fieldiana, Geology, 16:89116.
Denison, R. H. 1968. Early Devonian lungfishes from Wyoming, Utah, and Idaho. Fieldiana, Geology, 17:353413.
Dorf, E. 1934a. Stratigraphy and paleontology of a new Devonian formation at Beartooth Butte, Wyoming. Journal of Geology, 42:720737.
Dorf, E. 1934b. Lower Devonian flora from Beartooth Butte, Wyoming. Geological Society of America Bulletin, 45:425440.
Elliott, D. K. and Ilyes, R. R. 1996. Lower Devonian vertebrate biostratigraphy of the western United States. Modern Geology, 20:253262.
Elliott, D. K. and Johnson, H. G. 1997. Use of vertebrates to solve biostratigraphic problems: examples from the Lower and Middle Devonian of western North America. 179188. In Klapper, G., Murphy, M. A., and Talent, J. A. (eds.). Paleozoic Sequence Stratigraphy, Biostratigraphy, and Biogeography: Studies in Honor of J. Granville (“Jess”). Geological Society of America Special Paper 321.
Fiorillo, A. R. 1998. Notes on the Half Moon Canyon Section of the Beartooth Butte Formation (Lower Devonian), Big Snowy Mountains, central Montana. Northwest Geology, 28:1519.
Fiorillo, A. R. 2000. The ancient environment of the Beartooth Butte Formation (Devonian) in Wyoming and Montana: Combining paleontological inquiry with federal management needs. USDA Forest Service Proceedings RMRS-P-15, 3:160167.
Hall, J. 1859. Paleontology of New York, Volume 3, Containing descriptions and figures of the organic remains of the Lower Helderberg Group and the Oriskany sandstones. Albany, New York, 532 p.
Harris, V. A. P. and Robertson, H. M. 1994. New species belonging to the family Porcellidiidae (Harpacticoida: Copepoda) from the southern coast of New South Wales, Australia. Records of the Australian Museum, 46:257301.
Heymons, R. 1901. Die Entwicklungsgeschichte der Scolopender. Zoologica, 13(2-5):1244.
Johnson, J. G. and Sandberg, C. A. 1977. Lower and Middle Devonian continental-shelf rocks of the western United States. In Murphy, M. A., Berry, W. B. N., and Sandberg, C. A. (eds.). Western North America: Devonian. University of California, Riverside, Campus Museum Contributions 4, pp. 121143.
Johnson, J. G., Sandberg, C. A., and Poole, F. G. 1988. Early and Middle Devonian paleogeography of western United States. 161182. In McMillan, N. J., Embry, A. F., and Glass, D. J. (eds.). Devonian of the World, Volume I, Regional Synthesis. Proceedings of the Second International Symposium on the Devonian System. Canadian Society of Petroleum Geologists, 14.
Kjellesvig-Waering, E. N. 1955. Dorfopterus, a new genus of Eurypterida from the Devonian of Wyoming. Journal of Paleontology, 29(4):696697.
Kjellesvig-Waering, E. N. 1958. The genera, species and subspecies of the Family Eurypteridae, Burmeister, 1845. Journal of Paleontology, 32(6):11071148.
Kjellesvig-Waering, E. N. 1961. Eurypterids of the Devonian Holland Quarry Shale of Ohio. Fieldiana Geology, 14(5):7998.
Kjellesvig-Waering, E. N. 1966. A revision of the families and genera of the Stylonuracea (Eurypterida). Fieldiana Geology, 14:169197.
Kjellesvig-Waering, E. N. 1986. A restudy of the fossil Scorpionida of the World. Palaeontographica Americana, 55:1287.
Kjellesvig-Waering, E. N. and Heubusch, C. A. 1962. Some Eurypterida from the Ordovician and Silurian of New York. Journal of Paleontology, 36:211221.
Kjellesvig-Waering, E. N. and Størmer, L. 1952a. The Dolichopterus-Strobilopterus group in the Eurypterida. Journal of Paleontology, 26(4):659661.
Kjellesvig-Waering, E. N. and Størmer, L. 1952b. A Lower Devonian Pterygotus from Wyoming. Journal of Paleontology, 26(6):997998.
Miller, S. A. 1874. Genus Megalograptus. Cincinnati Quarterly Journal of Science, 1:343346.
Novojilov, N. I. 1962. Otrjad Eurypterida. In Rodendorf, B. B. (ed.). Osnovy Paleontologii. Chlenistonogie, trakhejiye i khelitserovye. Moscow: Izdatel'stvo Akademii Nauk SSSR, pp. 404423. [In Russian].
Plotnick, R. E. 1983. Patterns in the evolution of the eurypterids. Ph.D. dissertation, The University of Chicago, 411 p.
Poschmann, M. 2006. The eurypterid Adelophthalmus sievertsi (Chelicerata: Eurypterida) from the Lower Devonian (Emsian) Klerf Formation of Willwerath, Germany. Palaeontology, 49(1):6782.
Ruedemann, R. 1934. Eurypterids from the Lower Devonian of Beartooth Butte, Wyoming. Proceedings of the American Philosophical Society, 73(3):163167.
Ruedemann, R. 1935a. The eurypterids of Beartooth Butte, Wyoming. Proceedings of the American Philosophical Society, 75:129141.
Ruedemann, R. 1935b. A review of the eurypterid rami of the genus Pterygotus with the descriptions of two new Devonian species. Annals of the Carnegie Museum, 24:6972.
Ruedemann, R. 1939. Type invertebrate fossils of North America (Devonian): Eurypterida. Wagner Free Institute of Science, 17 cards.
Schmidt, F. 1883. Die Crustaceenfauna der Eurypterenschichten von Rootziküll auf Oesel. p. 28-88. In Miscellanea Silurica III. Memoires l'Academie Imperiale des Sciences de St.-Petersbourg, series VII, 31(5).
Størmer, L. 1951. A new eurypterid from the Ordovician of Montgomeryshire, Wales. Geological Magazine, 88:409422.
Tanner, W. 1983. A fossil flora from the Beartooth Butte Formation of northern Wyoming. Unpublished Ph.D. dissertation. Southern Illinois University, Carbondale. 222 p.
Tetlie, O. E. 2004. Eurypterid phylogeny with remarks on the origin of Arachnida. Unpublished Ph.D. dissertation, University of Bristol, United Kingdom. 320 p.
Tetlie, O. E. 2006. Two new Silurian species of Eurypterus (Chelicerata: Eurypterida) from Norway and Canada, and the phylogeny of the genus. Journal of Systematic Palaeontology, 4(4):397412.
Tetlie, O. E. and Dunlop, J. A. 2005. A redescription of the Late Carboniferous eurypterids Adelophthalmus granosus von Meyer, 1853 and A. zadrai Pribyl, 1952. Mitteilungen aus dem Museum für Naturkunde Berlin, Geowissenschaftliche Reihe, 8:312.
Tetlie, O. E. and Van Roy, P. 2006. A reappraisal of Eurypterus dumonti Stainier, 1917 and its position within the Adelophthalmidae Tollerton, 1989. Bulletin de L'Institut Royal des Sciences Naturelles. de Belgique, Sciences de la Terra, 76:7990.
Tollerton, V. P. Jr. 1989. Morphology, taxonomy, and classification of the Order Eurypterida Burmeister, 1843. Journal of Paleontology, 63(5):642657.
von Meyer, H. 1853. Mitteilung an Prof. Bronn. Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefaktenkunde, 1853:161165.
Walker-Smith, G. K. 2001. Porcellidium poorei, a new species of Porcellidiidae (Copepoda: Harpacticoida) from seagrass in Port Phillip Bay, Victoria, Australia, and a review of the family. Journal of Crustacean Biology, 21:653664.
Walcott, C. D. 1882. Description of a new genus of the order Eurypterida from the Utica Slate. American Journal of Science, 3rd Series, 23:213216.
Waterston, C. D. 1964. Observations on pterygotid eurypterids. Transactions of the Royal Society of Edinburgh, 66:933.

Related content

Powered by UNSILO

Like father, like son? Not amongst the eurypterids (Chelicerata) from Beartooth Butte, Wyoming

  • O. Erik Tetlie (a1)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.