Original paper
Three new Middle Jurassic dinoflagellate cysts from East Greenland
Piasecki, Stefan
Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen Band 219 Heft 1-2 (2001), p. 15 - 31
25 references
published: Aug 31, 2001
published online: Jul 3, 2018
DOI: 10.1127/njgpa/219/2001/15
ArtNo. ESP155021901002, Price: 29.00 €
Abstract
Three new species of dinoflagellate cysts are described from the Middle Jurassic successions in East Greenland. Dinoflagellate assemblages are recovered from thin mud shales within a Middle Jurassic succession otherwise dominated by coarse-grained marine sandstone. The new species are morphological characteristic and stratigraphic useful within the Upper Bathonian to Callovian. Evansia janeae n. sp. is described from the Charcot Bugt Formation in Milne Land, central East Greenland. The large 3I archaeopyle of E. janeae n. sp. is consistently and characteristically developed whereas the shape and sculpture vary significantly. Valvaeodinium leneae n. sp. and Valvaeodinium hanneae n. sp. are described from northern Hold with Hope and Store Koldewey, North East Greenland. Both species expose an archaeopyle in the apical region with a composite operculum of two opercular pieces, interpreted as a type AI. However, V. leneae has two wall layers closely apressed whereas V. hanneae is cavate with membranous filling of the cavation.
Kurzfassung
Aus dem mittleren Jura von Ostgrönland werden drei neue Arten von Dinoflagellatencysten beschrieben, die für die Stratigraphie des oberen Bathonien bis Callovien wichtig sind.
Keywords
dinoflagellate • East Greenland • Bathonia • Callovia • cysts