Campanian-Maastrichtian Pseudosabinia from Turkey: Descriptions and Taxonomic Problems


Ozer S.

TURKISH JOURNAL OF EARTH SCIENCES, vol.19, no.5, pp.643-669, 2010 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 5
  • Publication Date: 2010
  • Doi Number: 10.3906/yer-0909-7
  • Journal Name: TURKISH JOURNAL OF EARTH SCIENCES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.643-669
  • Keywords: Rudists, Pseudosabinia, description, taxonomy, Campanian-Maastrictian, EVOLUTION, RUDIST, PLATFORM, TETHYS, PLATE
  • Dokuz Eylül University Affiliated: No

Abstract

Specimens of taxa assigned to Pseudosabinia Morris & Skelton, collected from the Campanian-Maastrichtian sequences of different regions of Turkey such as the Kocaeli Peninsula, Amasya, Bayburt (Pontides), Sivas, Malatya, Elazig (eastern Anatolian platform) and Kahta-Adiyaman and Yaylaciftligi-Antakya (northernmost part of the Arabian platform), are determined and the taxonomic statuses of the species are discussed. Pseudosabinia klinghardti (Bohm) uniquely presents all the characteristic features of the genus. Other species and subspecies assigned to the genus 'Pseudosabinia' rtanjica (Pejovic), 'Pseudosabinia' serbica (Kuhn & Pejovic), 'Pseudosabinia' rtanjica triangularis (Karacabey) and 'Pseudosabinia' rtanjica tunisiensis (Philip) lack the cellular prismatic structure of the outer shell layer in the right valve - a characteristic feature of the type species - despite sharing with the latter a radiolitiform myocardinal apparatus, indicating some taxonomic problems about the definition of Pseudosabinia. Meanwhile, the right valve of 'Pseudosabinia' rtanjica triangularis (Karacabey) is unknown. These problematical species may belong to another genus of, most probably, Radiolitidae; but more detailed study is needed before a new taxon is created. Sabinia ornata Ozer & Fenerci is here transferred to Pseudosabinia because it presents all of the generic characteristics.