First report of sphaeronitid blastozoans (Echinodermata) in the Middle Ordovician of the Taurides, Turkey

Authors : Elise NARDIN, Mehmet Cemal GÖNCÜOĞLU, Bertrand LEFEBVRE

Pages : 444-451

Doi:10.3906/yer-1401-20

View : 15 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Articulated echinoderm remains are described for the first time in the Ordovician of Turkey. They occur massively, forming a relatively thick "cystoid bed" within the detrital limestone succession of the Sobova Formation insert ignore into journalissuearticles values(latest Dapingian–earliest Darriwilian); in the western Taurus Mountains. The "cystoid bed" encompasses a monospecific echinoderm assemblage of densely packed, 3-dimensionally preserved thecae. The presence of numerous suborganised plates with diplopore respiratory structures suggests probable affinities with sphaeronitid blastozoans. Comparable sphaeronitid dense beds are well known in the early Darriwilian of Baltica, and in the mid Darriwilian of the Middle East and Asian terranes.
Keywords : Antalya, Adana, Taurides, Ordovician, echinoderm, cystoid bed