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Senckenbergiana lethaea

, Volume 86, Issue 2, pp 191–227 | Cite as

Bajocian Ostracoda of Western Australia and their faunal affinities

  • Alan R. Lord
  • Heinz Malz
  • John E. Whittaker
  • John H. Callomon
Article

Abstract

The ostracod assemblages from the Newmarracarra Limestone Formation (Early Bajocian, Western Australia) are highly unusual in being formed exclusively by members of the superfamily Cytheroidea. They are also apparently composed dominantly of endemic taxa, with three new genera defined here (Bringocythere, Fistulosacythere, Gondwanacythere) and only three other genera known from elsewhere in the southern Tethyan area (AmicytherideaBate 1975,MandawacythereBate 1975,ParadoxorhynchaChapman 1904). Eight species represented by very limited material are tentatively compared with Northern Hemisphere genera but their real affinities are uncertain. The assemblages have little in common with the few records of Southern Hemisphere Middle Jurassic material described from Argentina and elsewhere.

Key words

Ostracoda Bajocian Western Australia 

Kurzfassung

Die Ostracoden-Vergesellschaftungen aus der Newmarracarra Limestone-Formation (unteres Bajocium; Western Australia) sind höchst ungewöhnlich in ihrer Zusammensetzung, weil darin ausschließlich Taxa der Über-Familie Cytheroidea enthalten sind. Es handelt sich dabei vorwiegend um endemische Taxa, von denen drei neue Gattungen bestimmt werden (Bringocythere, Fistulosacythere, Gondwanacythere); lediglich drei andere Gattungen sind auch aus anderen Tethys-Gebieten bekannt (AmicytherideaBate 1975,MandawacythereBate 1975,ParadoxorhynchaChapman 1904). Acht Arten sind sehr spärlich belegt und werden deshalb nur andeutungsweise auf Taxa aus der Nord-Hemisphäre bezogen, wobei ihre Zuordnung jedoch unsicher ist. Die Vergesellschaftungen haben wenig gemeinsam mit mitteljurassischem Material, das in beschränktem Maße von Argentinien und anderswo beschrieben wurde.

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Copyright information

© E. Schweizerbart’sche Verlagsbuchhandlung 2006

Authors and Affiliations

  • Alan R. Lord
    • 1
  • Heinz Malz
    • 2
  • John E. Whittaker
    • 3
  • John H. Callomon
    • 4
  1. 1.Forschungsinstitut SenckenbergSektion Mikropaläontologie IFrankfurt-am-MainGermany
  2. 2.BramscheGermany
  3. 3.Department of PalaeontologyThe Natural History MuseumLondonUK
  4. 4.University College LondonLondonUK

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