References
- Angelin , N. P. 1954 . Palaeontologia Scandinavica 1: Crustacea formationis transitionis Vol. 2 , 21 – 92 . Pls. 25–41. Lund.
- Bancroft , B. B. 1929 . Some new species of Cryptolithus (s. 1.), from the Upper Ordovician . Memoirs of Proceedings of the Manchester Literary and Philosophical Society , 73 : 67 – 98 . Pls. 1, 2
- Brenchley , P. J. , Harper , J. C. , Mitchell , W. I. and Romano , M. 1977 . A re-appraisal of some Ordovician successions in eastern Ireland . Proceedings of the Royal Irish Academy Section , B 77B : 68 – 85 . Pl. 1
- Bruton , D. L. and Owen , A. W. 1979 . Late Caradoccarly Ashgill trilobite distribution in the central Oslo Region, Norway . Norsk Geologisk Tidsskrift , 59 : 213 – 222 .
- Dean , W. T. 1960a . The Ordovician trilobite faunas of South Shropshire, I . Bulletin of the British Museum Natural History (Geology) , 4 : 73 – 143 . Pls. 11–19
- Dean , W. T. 1960b . The use of shelly faunas in a comparison of the Caradoc Series in England, Wales and parts of Scandinavia . Reports of the 21st International Geological Congress, Copenhagen , 7 : 82 – 87 .
- Dean , W. T. 1962 . The trilobites of the Caradoc Series in the Cross Fell Inlier of northern England . Bulletin of the British Museum Natural History (Geology) , 7 : 65 – 134 . Pls. 6–18
- Dean , W. T. 1963 . The Ordovician trilobite faunas of South Shropshire, IV . Bulletin of the British Museum Natural History (Geology) , 9 : 1 – 18 . Pls. 1, 2
- Hawle , I. and Corda , A. J. C. 1847 . Prodrom einer Monographie der böhmischen Trilobiten 176 Prague 7 Pls.
- Hughes , C. P. , Ingham , J. K. and Addison , R. 1975 . The morphology, classification and evolution of the Trinucleidae (Trilobita) . Philosophical Transactions of the Royal Society (B) , 272 : 537 – 607 . Pls. 1–10
- Hurst , J. M. 1979 . The stratigraphy and brachiopods of the upper part of the type Caradoc of south Salop . Bulletin of the British Museum Natural History (Geology) , 32 : 183 – 304 . Figures 1–557
- Jaanusson , V. Faunal dynamics in the Middle Ordovician of Balto-Scandia . The Ordovician System: proceedings of a Palaeontological Association symposium . September 1974 , Birmingham . Edited by: Bassett , M. G. pp. 301 – 326 . Cardiff : University of Wales Press & National Museum of Wales .
- Kjerulf , T. 1957 . Über die Geologie des südlichen Norvegens . Nyt Magasin for Naturvidenskap , 9 : 193 – 333 .
- Lamont , A. 1935 . The Drummuck Group, Girvan: A stratigraphical revision with descriptions of new fossils from the lower part of the group . Transactions of the Geological Society of Glasgow , 19 : 288 – 332 . Pls. 7–9
- Owen , A. W. 1978 . The Ordovician and Silurian stratigraphy of central Hadeland, south Norway . Norges geologiske undersökelse , 338 : 1 – 23 . Pl. 1
- Owen , A. W. 1979 . (for 1978): The upper Ordovician succession at Norderhov and on Frognøya in Ringerike, Norway . Norsk Geologisk Tidsskrift , 58 : 245 – 258 .
- Reed , F. R. C. 1910 . New fossils from the Dufton Shales . Geological Magazine , 7 : 211 – 220 . 294 – 299 . Pls. 16, 17, 23, 24
- Størmer , L. 1930 . Scandinavian Trinucleidae with special reference to Norwegian species and varieties 1 – 111 . Skrifter utgitt av Det Norske Videnskaps-Akademi i Oslo I Mat.- Naturvidenskap Klasse 1930 (4), Pls. 1–14
- Størmer , L. 1953 . The Middle Ordovician of the Oslo Region, Norway. 1. Introduction to stratigraphy . Norsk Geologisk Tidsskrift , 31 : 37 – 141 . Pls. 1–6
- Thorslund , P. 1940 . On the Chasmops Series of Jemtland and Södermanland (Tvären) . Sveriges geologiska undersökning C , 436 : 1 – 191 . Pls. 1–15
- Whittington , H. B. 1966 . A monograph of the Ordovician trilobites of the Bala area, Merioneth . Paleonto-graphical Society [Monograph] , 3 : 63 – 92 . Pls. 19–28