Resumen de Jurassic ostracodes from Gebel Maghara, Sinai, Egypt

Amnon Rosenfeld, Ephraim Gerry, Avraham Honigstein

• Thirty four ostracode species are recorded from the exposure of the Jurassic strata of Gebel Maghara, northern Sinai, Egypt. Nine of them are described as new. They belong of the genera: Praeschuleridea, Progonocythere, Kinkelinella, Glyptogatocythere, Terquemula, Ektyphocythere and Exophthalmocythere. The following five ostracode assemblage zones, based on the first occurrence of diagnostic species, were established in the formations of the Jurassic sequence in Gebel Maghara:

  Ektyphocythere bucky (J-1) Zone in the Inmar Formation of Toarcian age;

  Glyptogatocythere magharaensis (J-2) Zone in the Daya and the lower Sherif formations of Bajocian age;

  Progonocythere homigstini-Fastigatocythere bakeri (J-3) Zone in the upper Sherif Formation of Bathonian age;

  Ektyphocythere zoharensis (J-4) Zone in the Zohar Formation of Callovian age, and;

  Exophthalmocythere kidodensis (J-5) Zone in the Kidod Formation of Oxfordian age.

  Most of the defined ostracode assemblages suggest rather shallow marine, warm environments of deposition, The faunas exhibit similarities to those, described from Israel, Jordan, France and England.