A revision of the late jurassic dinoflagellate cysts ambonosphaera? Staffinensis (gitmez 1970) comb. nov., and senoniasphaera jurassica (gitmez & sarjeant 1972) Lentin & Williams 1976

Niels E. Poulsen, James B. Riding

Publikation: Bidrag til tidsskriftArtikelForskningpeer review

10 Citationer (Scopus)

Abstrakt

The type material of “Meiourogonyaulax” staffinensis Gitmez 1970 and Hexagonifera sp. Gitmez 1970 (later “H.” jurassica Gitmez & Sarjeant 1972) from the earliest Kimmeridgian (Late Jurassic) of Scotland and England has been restudied. The former species is a small (42-51 (im), camocavate to circumcavate gonyaulacacean cyst with an apical archeopyle and a median parasulcus and is herein questionably attributed to Ambonosphaera Fensome 1979. Sirmiodiniopsis frisia (Raynaud 1978) Lentin & Williams 1981 is deemed to be a subjective junior synonym of Ambonosphaera? staffinensis. Senoniasphaera jurassica (Gitmez & Sarjeant 1972) Lentin & Williams 1976 is a larger (63-105 μm), circumcavate species also with a gonyaulacacean paratabulation and an apical archeopyle, but with a markedly offset parasulcal notch. The specific diagnoses of these two Late Jurassic species are emended to include new information on morphology and paratabulation.

OriginalsprogEngelsk
Sider (fra-til)25-34
Antal sider10
TidsskriftPalynology
Vol/bind16
Udgave nummer1
DOI
StatusUdgivet - 1992

Emneord

  • Palynology
  • Taxonomy
  • Jurassic

Programområde

  • Programområde 3: Energiressourcer

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