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The Silurian encrinurine trilobite Pacificurus: new species from North America

  • Gregory D. Edgecombe (a1) and Lars Ramsköld (a2)


The first Laurentian records of Pacificurus Ramsköld, 1986 are provided by Pacificus chilorhodus n. sp. (latest Llandovery?–early Wenlock, Mackenzie Mountains, Canada) and Pacificurus sp. A (early Ludlow, northern Maine). These closely related species represent an early divergence (minimally late Llandovery) from Australian/Asian congenerics.



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Angelin, N. P. 1854. Palaeontologia Scandinavica. I. Crustacea formationis transitionis. Fascicule, 2:2192.
Berry, W. B. N., and Boucot, A. J. 1970. Correlation of the North American Silurian rocks. Geological Society of America, Special Paper, 102:1289.
Boucot, A. J., Field, M. T., Fletcher, R., Forbes, W. H., Naylor, R. S., and Pavlides, L. 1964. Reconnaissance bedrock geology of the Presque Isle quadrangle, Maine. Maine Geological Survey Quadrangle Mapping Series, 2, 123 p.
Edgecombe, G. D., and Chatterton, B. D. E. 1987. Heterochrony in the Silurian radiation of encrinurine trilobites. Lethaia, 20:337351.
Edgecombe, G. D., and Chatterton, B. D. E. 1990. Mackenziurus, a new genus of the Silurian “Encrinurusvariolaris plexus (Trilobita). American Museum Novitates, 2968, 22 p.
Edgecombe, G. D., and Chatterton, B. D. E. 1992. Early Silurian (Llandovery) encrinurine trilobites from the Mackenzie Mountains, Canada. Journal of Paleontology, 66:5274.
Edgecombe, G. D., Speyer, S. E., and Chatterton, B. D. E. 1988. Protaspid larvae and phylogenetics of encrinurid trilobites. Journal of Paleontology, 62:779799.
Etheridge, R., and Mitchell, J. 1916. The Silurian trilobites of New South Wales. Part V. The Encrinuridae. Proceedings of the Linnaean Society of New South Wales, 40:646680.
Fletcher, H. O. 1950. Trilobites from the Silurian of New South Wales. Records of the Australian Museum, 22:220233.
Foerste, A. F. 1888. Notes on Paleozoic fossils. Bulletin of the Scientific Laboratories of Denison University, 3:117137.
Kobayashi, T., and Hamada, T. 1974. Silurian trilobites of Japan in comparison with Asian, Pacific, and other faunas. Palaeontological Society of Japan, Special Papers, 18, 155 p.
Kobayashi, T., and Hamada, T. 1985. Additional Silurian trilobites to the Yokokura-Yama fauna from Shikoku, Japan. Transactions and Proceedings of the Palaeontological Society of Japan, 139:206217.
Kobayashi, T., and Hamada, T. 1987. On the Silurian trilobite fauna of Hitoegane near Fukuji in the Hida Plateau, Japan. Transactions and Proceedings of the Palaeontological Society of Japan, 147:131145.
Kobayashi, T., and Sakagami, S. 1989. A Silurian trilobite from Thailand. Proceedings of the Japan Academy, 65:3133.
Lane, P. D. 1988. Silurian trilobites from Peary Land, central North Greenland. Grønlands Geologiske Undersøgelse, Rapport, 108:93117.
Ludvigsen, R., and Tripp, R. P. 1990. Silurian trilobites from the northern Yukon Territory. Royal Ontario Museum, Life Sciences Contributions, 153:159.
Over, D. J., and Chatterton, B. D. E. 1987. Silurian conodonts from the southern Mackenzie Mountains, Northwest Territories, Canada. Geologica et Palaeontogica, 21:149.
Pillet, J., and De Lapparent, A. F. 1970. Description de trilobites ordoviciens, siluriens et devoniens d'Afghanistan. Annales de la Société Géologique du Nord, 89:323333.
Poulsen, C. 1934. The Silurian faunas of North Greenland. I. The fauna of the Cape Schuchert Formation. Meddelelser om Gronland, 72:146.
Ramsköld, L. 1986a. Silurian encrinurid trilobites from Gotland and Dalarna, Sweden. Palaeontology, 29:527575.
Ramsköld, L. 1986b. Pacificurus, new name for Australurus Ramsköld (not Jell and Duncan). Geologiska Föreningens i Stockholm Förhandlingar, 108:380.
Ramsköld, L., and Chatterton, B. D. E. 1991. Revision and subdivision of the polyphyletic Leonaspis (Trilobita). Transactions of the Royal Society of Edinburgh, Earth Sciences:82.
Reed, F. R. C. 1906. The lower Paleozoic fossils of the northern Shan States, Burma. Memoir of the Geological Survey of India, Palaeontologia Indica, 2, 154 p.
Strusz, D. L. 1980. The Encrinuridae and related trilobite families, with a description of Silurian species from southeastern Australia. Paleontographica A, 168:168.
Thomas, A. T., and Narbonne, G. M. 1979. Silurian trilobites from arctic Canada. Geological Magazine, 116:119.
Wu, H.-J. 1984. Silurian trilobites from Darhan Mumingan Joint Banner, Inner Mongolia, p. 175184. In Li, W.-G., Rong, J.-Y., and Dong, D.-Y. (eds.), Silurian and Devonian Rocks and Faunas of the Bateaobao Area in Darhan Mumingan Joint Banner, Inner Mongolia. People's Publishing House of Inner Mongolia.
Zhang, W.-T. 1983. On the subfamily Coronocephalinae (Trilobita). Palaeontologia Cathayana, 1:195257.

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The Silurian encrinurine trilobite Pacificurus: new species from North America

  • Gregory D. Edgecombe (a1) and Lars Ramsköld (a2)


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