Chapter 18 Arthropoda: Protarthropoda and Trilobitomorpha

First and Last, M.Camb: Aysheaia pedunculata Walcott, Bathyuriscus-Elrathina Z., Burgess Shale, British Columbia. Xenusion Pompeckj, ?Pre-Camb-Camb (Pleist drift), Germany, may be Onychophora but age unknown (Treatise O and W, Glaessner 1962). Comment: Ancestor of Euonychophora Hutchinson, Quat Holo. First and Last, M.Camb: Marrella splendens Walcott, Bathyuriscus-Elrathina Z., British Columbia (Treatise O; Simonetta 1962, ref. in Whittington & Rolfe 1963, p. 19). Mimetaster Gürich, Dev Siegen, has been regarded as a later marrellomorph (Dechaseaux in Piveteau 1953), but may be a crustacean metanauplius (Treatise R). Pygaspis Beurlen 1934, Perm Assel, is not Marrellomorpha but Crustacea Pygocephalomorpha (Brooks 1962). First, L.Camb: Sidneyia? [Amiella] prisca (Mansuy in Deprat & Mansuy) 1912, Palaeolenus Z., Indochina (Simonetta 1964). S.groenlandica Cleaves, Pre-Camb Varang, is inorganic (Rolfe 1963). The L. Camb taxa erected by Vologdin (1965) are based on pseudofossils, probably rolled-up mud flakes. First and Last, M.Camb: Burgessia and Waptia Walcott, Bathyuriscus-Elrathina Z., British Columbia (Treatise O). First and Last, Dev Siegen: Cheloniellon calmani Broili, Hunsrückschiefer, Germany (Treatise O). First and Last, M. Camb: Opabinia regalis Walcott, Bathyuriscus-Elrathina Z., British Columbia (Treatise O). First and Last, M.Camb: Yohoia, Helmetia, Mollisonia Walcott, Houghtonites Raymond 1931, Bathyuriscus-Elrathina Z., British Columbia. Tontoia Walcott, ?Albertella Z., Arizona, is a doubtful, earlier record; Yohoia?, U.Camb, Siberia, may be a later record (Novozhilov in Orlov 1960, p. 195). Introduction: The classification of Treatise O has been adopted as a framework because of its general availability to readers, but it should be emphasised that there is at present no generally acceptable major classificatory scheme for the trilobites. Where individual families are considered

[1]  R. E. Grant.  Late Permian trilobites from the Salt Range, West Pakistan , 1966 .

[2]  F. Nikolaisen.  The Middle Ordovician of the Oslo region, Norway. 18. Rare trilobites of the families Olenidae,Harpidae,Ityophoridae and Cheiruridae , 1965 .

[3]  A. R. Palmer.  Trilobites of the Late Cambrian Pterocephaliid biomere in the Great Basin, United States , 1965 .

[4]  H. B. Whittington.  Trilobites of the Ordovician Table Head formationc western Newfoundland , 1965 .

[5]  R. Robison.  Middle-Upper Cambrian Boundary in North America , 1964 .

[6]  A. R. Palmer.  An unusual Lower Cambrian trilobite fauna from Nevada , 1964 .

[7]  R. Hessler.  Lower Mississippian trilobites of the family Proetidae in the United States, Part 1 , 1963 .

[8]  B. A. Engel,et al.  The faunas of the Tournaisian Tulcumba Sandstone and its members in the Werrie and Belvue synclines, New South Wales , 1963 .

[9]  A. R. Palmer.  Glyptagnostus and associated trilobites in the United States , 1962 .

[10]  R. D. Hutchinson.  Cambrian Stratigraphy and Trilobite Faunas of southeastern Newfoundland , 1962 .

[11]  R. Tripp.  The Silurian trilobite Encrinurus punctatus (Wahlenberg) and allied species , 1962 .

[12]  H. Osmólska.  Famennian and Lower Carboniferous Cyrtosymbolinae (Trilobita) from the Holy Cross Mountains, Poland , 1962 .

[13]  M. Churkin,et al.  Silurian strata of the Klamath Mountains, California , 1960 .

[14]  J. L. Wilson,et al.  Cambrian biostratigraphy in North America , 1958 .

[15]  R. Goldring.  Lower Tournaisian trilobites in the Carboniferous limestone facies of the south-west Province of Great Britain and of Belgium , 1958 .

[16]  W. F. Whittard.  The Ordovician Trilobites of the Shelve Inlier, West Shropshire , 1957, Monographs of the Palaeontographical Society.

[17]  A. Leanza,et al.  Ordovician Trilobites of Argentina , 1957 .

[18]  T. Tjernvik.  On the Early Ordovician of Sweden. Stratigraphy and fauna. , 1956 .

[19]  Christina L. Balk.  Lower Ordovician Trilobites from Western Utah and Eastern Nevada , 1954 .

[20]  Christina Lochman-Balk.  Analysis and discussion of nine Cambrian trilobite families , 1953 .

[21]  H. B. Whittington.  North American Bathyuridae and Leiostegiidae (Trilobita) , 1953 .

[22]  B. N. Cooper.  Trilobites from the Lower Champlainian Formations of the Appalachian Valley , 1953 .

[23]  E. A. Frederickson,et al.  Two trilobite genera from the Harding Formation (Ordovician) of Colorado , 1952 .

[24]  C. J. Stubblefield.  Further Renaming of the Tremadoc Trilobite Genus Psilocephalus Salter , 1951, Geological Magazine.

[25]  F. Rasetti.  Middle Cambrian stratigraphy and faunas of the Canadian Rocky Mountains , 1951 .

[26]  H. B. Whittington.  SIXTEEN ORDOVICIAN GENOTYPE TRILOBITES , 1950 .

[27]  F. Rasetti.  New Lower Ordovician trilobites from Levis, Quebec , 1943 .

[28]  F. Reed.  IV.—The genera of British Carboniferous Trilobites , 1943 .

[29]  C. E. Resser.  The Spence shale and its fauna, (with six plates) , 1939 .

[30]  B. F. Howell,et al.  Lower Cambrian Olenellus zone of the Appalachians , 1938 .

[31]  B. F. Howell.  Cambrian Centropleura vermontensis fauna of northwestern Vermont , 1937 .

[32]  O. Bulman,et al.  On the Cambro-Ordovician faunas of western Quruq tagh, eastern T'ien-shan , 1937 .

[33]  P. Lake.  A Monograph of the British Cambrian Trilobites. Part VIII. Pages 173–196: Plates XXIII–XXV , 1934 .

[34]  E. Ulrich.  Ordovician trilobites of the family Telephidae and concerned stratigraphic correlations , 1930 .

[35]  O. Bulman,et al.  The Shineton Shales of the Wrekin District: with Notes on their Development in other parts of Shropshire and Herefordshire , 1927, Quarterly Journal of the Geological Society of London.

[36]  V. C. Illing.  The Paradoxidian Fauna of a Part of the Stockingford Shales , 1915, Quarterly Journal of the Geological Society of London.