114 
1973. The Lower Palaeozoic stratigraphy and faunas of the Taurus Mountains near 
Beysehir, Turkey. III. The trilobites of the Sobova Formation (Lower Ordovician). 
Bulletin of the British Museum (Natural History), London, Geology, 24: 279-348. 
Dewey, J. F., Rickards, R. B. & Skevington, D. 1970. New light on the age of 
Dalradian deformation and metamorphism in western Ireland. Norsk Geologisk 
Tiddskrift, Oslo, 50: 19-44. 
Droser, M. L., Fortey, R. A. & Xing Li. 1996. The Ordovician radiation. American 
Scientist, New Haven, 84: 122-131. 
Esmark, M. T. 1833. Om nogle nye Arter af Trilobiter. Magazin Naturvidensk 
Christiania, 11: 268-270, pl. 7. 
Fortey, R.A. 1974. A new pelagic trilobite from the Ordovician of Spitsbergen, Ireland, 
and Utah. Palaeontology, London, 17: 111-124. 
1975a. The Ordovician trilobites of Spitsbergen. Il. Asaphidae, Nileidae, 
Raphiophoridae and Telephinidae of the Valhallfonna Formation. Norsk Polarinstitut 
Skrifter, Oslo, 162: 1-207. 
— 1975b. Early Ordovician trilobite communities. Fossils and Strata, Oslo, 4: 339— 
360. 
1979. Early Ordovician trilobites from the Catoche Formation (St. George 
Group), western Newfoundland. Geological Survey of Canada Bulletin, Ottawa, 
321: 61-114. 
— 1980. The Ordovician trilobites of Spitsbergen. III. Remaining trilobites of the 
Valhallfonna Formation. Norsk Polarinstitut Skrifter, Oslo, 171: 1-163. 
— 1983. Cambrian-Ordovician trilobites from the boundary beds in western New- 
foundland and their phylogenetic significance. Special Papers in Palaeontology, 
London, 30: 179-211. 
& Droser, M. L. 1996. Trilobites at the base of the Middle Ordovician, western 
United States. Journal of Paleontology, Lawrence, 70: 73-99. 
& Owens, R. M. 1975. Proetida — a new order of trilobites. Fossils and Strata, 
Oslo, 4: 227-239. 
& 1987. The Arenig Series in South Wales. Bulletin of the British Museum 
(Natural History), London, Geology, 41: 69-307. 
& Shergold, J. H. 1984. Early Ordovician trilobites of the Nora Formation, 
central Australia. Palaeontology, London, 27: 315-366, pls 38-46. 
Gardiner, C. I. & Reynolds, S. H. 1909. On the igneous and associated sedimentary 
rocks of the Tourmakeady district (Co. Mayo), with a palaeontological appendix by 
F. R. C. Reed. Quarterly Journal of the Geological Society, London, 65: 104-156. 
& 1910. The igneous and associated sedimentary rocks of the Glensaul 
district (Co, Galway), with a palaeontological appendix by F. R. C. Reed. Quarterly 
Journal of the Geological Society, London, 66: 253-279. 
Harrington, H. J. & Leanza, A. F. 1957. Ordovician trilobites of Argentina. Special 
Publication of the University of Kansas, Department of Geology, Lawrence, 1: 1— 
276. 
Hawle, I. & Corda, A. J. C. 1847. Prodrom einer Monographie der béhmischen 
Trilobiten. 176 pp. Prague. 
Henderson, R.A. 1983. Early Ordovician faunas from the MountWindsor Subprovince, 
northeastern Queensland. Memoirs of the Australasian Association of Palaeontolo- 
gists, Brisbane, 1: 145-175. 
Hintze, L. F. 1953. Lower Ordovician trilobites from western Utah and eastern Nevada. 
Utah Geological and Mineralogical Survey Bulletin, Salt Lake City, 48: 1-249. 
Holliday, S. 1942. Ordovician trilobites from Nevada. Journal of Paleontology, Menasha, 
16: 471-478, pls 73, 74. 
Horny, R. & Bastl, F. 1970. Type specimens of fossils in the National Museum, Prague. 
Volume 1. Trilobita. 354 pp, pls 1-20. Museum of Natural History, Prague. 
Howell, B. F. 1935. Cambrian and Ordovician trilobites from Hérault, southern France. 
Journal of Paleontology, Menasha, 9: 218-221. 
Hu C.-H. 1971. Ontogeny and sexual dimorphism of Lower Paleozoic Trilobita. 
Palaeontographica Americana, Ithaca, 7: 31-155, pls 7-26. 
Hughes, N. C., & Fortey, R. A. 1996. Sexual dimorphism in trilobites, with an 
Ordovician case study. Jn, Cooper, J.D., Droser, M.L., & Finney, S.C. (eds.), 
Ordovician odyssey: short papers for the Seventh International Symposium on the 
Ordovician System. Pacific Section, Society for Sedimentary Geology, Fullerton, 
Book 77: 419-421. 
Hupeé, P. 1953. Classe des Trilobites. Jn, Piveteau, J. (ed.), Traité de Paléontologie, 3: 
44-246. Paris. 
Ingham, J. K., Curry, G. B. & Williams, A. 1986. Early Ordovician Dounans 
Limestone fauna, Highland Border Complex, Scotland. Transactions of the Royal 
Society of Edinburgh, 76 (for 1985): 481-513. 
Jaanusson, V. 1956. On the trilobite genus Celmus Angelin, 1854. Bulletin of the 
Geological Institutions of Uppsala, Uppsala, 36: 35-49. 
1957. Unterordovizische Ilaeniden aus Skandinavien. Bulletin of the geological 
Institutions of the University of Uppsala, Uppsala, 37: 79-165. 
Jaekel, O. 1909. Uber die Agnostiden. Zerschrift der Deutschen Geologischen 
Gesellschaft, 61: 380-400. 
James, N. P. & Stevens, R. K. 1986. Stratigraphy and correlation of the Cambro- 
Ordovician Cow Head Group, western Newfoundland. Geological Survey of Canada 
Bulletin, Ottawa, 366: 1-99. 
Koroleva, M. N. 1982. Ordovician trilobites of South-central Kazakhstan. Nedra, 
Moscow. 192 pp. 
J.M. ADRAIN AND R.A. FORTEY 
Lane, P. D. 1971. British Cheiruridae (Trilobita). Palaeontographical Society Mono- 
graph, London, 530: 1-95. 
Laurie, J. R., & Shergold, J. H. 1996. Early Ordovician trilobite taxonomy and 
biostratigraphy of the Emanuel Formation, Canning Basin, western Australia. 
Palaeontographica, Abteilung A, Stuttgart, 240: 65-103. 
Linnarsson, J. G. O. 1869. Om Vestergétlands Cambriska och Siluriska aflagringar. 
Kungliga Svenska Vetenskapsakademiens Handlingar, Stockholm 8: 1-89, pls 1, 2. 
Lisogor, K.A. 1995. Llanvirn trilobites from the Orovician of Betpak-Dali (southern 
Kazakhstan). Vestnik kazakhskogo Natsional’nogo Tekhnicheskogo universiteta 
Geologo-Mineralogicheskie nauki, Alma-ata, 4: 110-115, pl. 1. [In Russian]. 
Lochman, C. 1953. Notes on Cambrian trilobites — homonyms and synonyms. Journal 
of Paleontology, Menasha, 27: 886-896. 
Ludvigsen, R. 1980. An unusual trilobite faunule from Llandeilo or lowest Caradoc 
strata (Middle Ordovician) of northern Yukon Territory. /n, Current Research, Part B. 
Geological Survey of Canada, Paper, Ottawa, 80-1B: 97-106. 
Westrop, S. R. & Kindle, C. H. 1989. Sunwaptan (Upper Cambrian) trilobites of 
the Cow Head Group, western Newfoundland, Canada. Palaeontographica 
Canadiana, Toronto, 6: 1-175. 
Mansuy, H. 1920. Nouvelle contribution a l'étude des faunas palaeozoiques et 
mesozoiques. Mémoires du Service Géologique de |’ Indochine, Hanoi-Haiphong, 7: 
1-22, pls 1-3. 
Marek, L. 1952. Contribution to the stratigraphy and fauna of the uppermost part of the 
Kréluy Dvur Shales (Ashgillian). Sbornik Ustredntho Ustavu Geologického 
(Paleontology), Prague, 19: 429-455. 
Mitchell C. E. & Maletz, J. 1995. Proposal for adoption of the base of the Undulograptus 
austrodentatus Biozone as a global Ordovician stage and series boundary level. 
Lethaia, Oslo, 28: 317-331. 
Moore, R. C. 1959. Treatise on Invertebrate Paleontology. Part O. Arthropoda 1. 
560pp. Lawrence & Meriden. 
Morris, S. F. 1988. A review of British trilobites, including a synoptic revision of 
Salter’s monograph. Monograph of the Palaeontographical Society, London, 574: 1— 
316. 
Neuman, R. B. 1984. Geology and paleobiology of islands in the Ordovician Iapetus 
Ocean: review and implications. Bulletin of the Geological Society of America, 
Boulder, 95: 1188-1201. 
Nielsen, A. T. 1995. Trilobite systematics, biostratigraphy and palaeoecology of the 
Lower Ordovician Komstad Limestone and Huk Formations, southern Scandinavia. 
Fossils and Strata, Oslo, 38: 1-374. 
Nieszkowski, J. 1857. Versuch einer Monographie der in den silurischen Schichten der 
Ostseeprovinzen vorkommenden Trilobiten. Archiv fiir die Naturkunde Liv, Ehst- 
und Kurlands, Dorpat, 1: 517-626, pls 1-3. 
Nikiforova, O. I. 1955. Field atlas of the Ordovician and Silurian fauna of the Siberian 
Platform. Moscow, 266 pp., 62 pls. [In Russian] 
Opik, A. 1937. Trilobiten aus Estland. Acta et Commentationes Universitatis Tartuensis, 
Tartu, 32: 1-163. 
Osmolska, H. 1957. Trilobites from the Couvinian of Wydrysz6w (Holy Cross 
Mountains, Poland). Acta Palaeontographica Polonica, Warsaw, 2: 53-77, pls 1-3. 
Owens, R. M. 1973a. British Ordovician and Silurian Proetidae (Trilobita). 
Palaeontographical Society Monograph, London, 535: 1-98. 
1973b. Ordovician Proetidae (Trilobita) from Scandinavia. Norsk Geologisk 
Tidsskrift, Oslo, 53: 117-181. 
1981. The Ordovician proetacean trilobite Rorringtonia. Geological Magazine, 
Cambridge, 118: 89-94, pl. 1. 
Owens, R. M. & Hammann, W. 1990. Proetide trilobites from the Cystoid Limestone 
(Ashgill) of NW Spain, and the suprageneric classification of related forms. 
Paldontologische Zeitschrift, Berlin, 64: 221-244. 
Palmer, A. S. 1962. Glyptagnostus and associated trilobites in the United States. United 
States Geological Survey Professional Paper, Washington, 374-F: 1-49. 
Peng, S. 1990. Tremadoc stratigraphy and trilobite faunas of northwestern Hunan. 2. 
Trilobites from the Panjiazui Formation and the Madaoyu Formation in Jiangnan 
Slope Belt. Beringeria, Wirzburg, 2: 55-171, pls 1-23. 
Pictet, F.-J. 1854. Traité de Paléontologie. 2nd edition. Vol. 2, 727 pp., pls 31-56. 
Poulsen, C. 1946. Notes on Cambro-Ordovician fossils collected by the Oxford 
University Ellesmere Land Expedition, 1934—S. Quarterly Journal of the Geological 
Society of London, 102: 299-337. 
Poulsen, V. 1965. An early Ordovician trilobite fauna from Bornholm. Meddelelser fra 
Dansk Geologisk Forening, Copenhagen, 16: 49-113, pls 1-9. 
Prantl, F. & Pribyl, A. 1949. A study of the superfamily Odontopleuracea nov. 
superfam. (Trilobites). Rozpravy Ustredniho Ustavu Geologického, Prague, 12: 1- 
221, pls I-11. 
Pratt, B. R. 1992. Trilobites of the Marjuman and Steptoean stages (Upper Cambrian), 
Rabbitkettle Formation, southern Mackenzie Mountains, northwest Canada. 
Palaeontographica Canadiana, Toronto, 9: 1-179. , 
Pribyl, A. 1946. Prispevek k poznani ceskych Proetidu. Rozpravy Ceské Akademie Véd 
a Umeni, Prague, 55: 1-37. [In Czech] 
Pudsey, C. J. 1984. Ordovician stratigraphy and sedimentology of the South Mayo 
Inlier. /rish Journal of Earth Sciences, Dublin, 6, 15-45. 
Ramskold, L. 1991. Pattern and process in the evolution of the Odontopleuridae 
