A taxonomic and nomenclatural revision of the historical brachiopod collection from the Lower Jurassic of Yakacik (Ankara, Turkey), housed in the Geological and Geophysical Institute of Hungary

Abstract

In this paper the Early Jurassic brachiopods from Yakacik (Turkey), housed at the Geological and Geophysical Institute of Hungary, are examined in detail in the framework of a taxonomic and nomenclatural revision of the 197
specimens collected by R. MILLEKER in 1911–1912, and shortly described by VADÁSZ (1913a, b, 1918). This revision resulted in the identification of 27 brachiopod taxa. They represent 16 genera and 23 nominal species; these are
systematically described and documented by photographs and partly by serial sections. The new brachiopod taxa introduced and illustrated by VADÁSZ (1913a, b): Rhynchonellina anatolica and Waldheimia anatolica are re-evaluated
and their taxonomic positions are updated as Suessia ? anatolica (VADÁSZ, 1913) and Aulacothyris anatolica (VADÁSZ, 1913), respectively. The Early Jurassic (Pliensbachian) brachiopod fauna of Yakacik shows a transitional character
between two major faunal provinces: besides 4 endemic and 4 cosmopolitan species, 6 species have NW European, and 9 species have Mediterranean faunal affinity.