The oldest record of gnathostome fossils from Greece: Chondrichthyes from the Lopingian of Hydra Island 

A late Permian ichthyofauna from the Zechstein Basin, Lithuania-Latvia Region

“…The Hybodontoidei remains and Euselachii dermal denticles are already known from Early Permian of Texas [79]; from Middle Permian of Arizona [80]; from Lopingian of Hydra Island, Greece [20]; from Kazanian Stage, Middle Permian of Russia [81]; and Naujoji Akmenė Formation, late Permian of Lithuania [25]. Also, the Hybodontidae dermal denticles were found under Permian-Triassic boundary in Zhejiang and Jiangxi provinces in South China [12–13].…”

“…Osteichthyans and chondrichthyans represent the dominant fish classes among marine and freshwater vertebrates since the Carboniferous period [3–4] and are relatively common in the late Permian fossil records. Fish remains occur widely around Pangea, including current areas of Australia [5], South Africa [6–8], Brazil [9–10], China [11–13], Japan [14], Russia [15–17], Iran [18], India [19] and Greece [20]. Moreover, various fish assemblages were widely spread in the Zechstein Basin, based on the fossil findings from Germany [21], England [22], East Greenland [23], Poland [24] and Lithuania [25].…”

Chondrichthyan teeth from the Early Triassic Paris Biota (Bear Lake County, Idaho, USA)

“…The sedimentary deposits of the Paris Biota correspond to alternating cm-thick mudstones with silty laminae and marls, and display some hummocky cross stratifications and erosion surfaces, indicating deposition in a distal upper offshore environment on a very flat platform, where distal storms acted intermittently (see Brayard et al, 2017 for further information on the locality, geology and palaeoenvironment). surface, although there is less clarity regarding this feature in isolated teeth (Argyriou et al, 2017). We herein use open nomenclature in the sense of Bengtson (1988).…”

The Fossil Record of Ray-Finned Fishes (Actinopterygii) in Greece

“…The pre-Neogene fossil record of Greece merits further scientific attention and exploration, especially given the huge record of sedimentary rocks and complex geological history of Greece. Deposits predating the Jurassic have not yet, to the author's knowledge, been investigated extensively for potential paleoichthyological content (excluding conodonts), and like in the case of chondrichthyans (Argyriou et al 2017), actinopterygian fossils are anticipated in Paleozoic-early Mesozoic deposits.…”