The Geology of Greece was my major teaching responsibility and research focus for about 40 years in the Department of Geology at the National and Kapodistrian University of Athens. My first book regarding the Geology of Greece published in 1986 (Eptalofos Publ. Co., Athens, 240 p., in greek) was focused in assisting the students of Geology to refine the basic aspects about the geology of Greece, incorporating the «theoretical» part together with the description of the geological formations and the overall geodynamic and paleogeographic evolution. It should be noted that the Geology of Greece is a complex and rather challenging task, incorporating a Late Paleozoic—Early Cenozoic orogenic history of a Tethyan segment and an active subduction and orogenic arc in the Eastern Mediterranean.

Vertebrates (Chordata: Vertebrata) are animals closely related to other animals with a notochord, namely, the lancelets (Cephalochordata) and ascidians (Urochordata). Although traditionally considered as subphyla of the phylum Chordata, a recent review by Irie et al. (2018) proposes the recognition of Vertebrata as a separate phylum, because of new evidence from comparative genomic, geneexpression, and morphological studies.