Text-fig. 8. Arborichnus repetitus ROMANO et MELÉNDEZ, 1985 and some other trace fossils from the Bashkirian of the Donets Basin. a: fragment of the axis of Lepidodendron with numerous burrows of arthropods around it (probably Arborichnus), GMLNU-5/4444 (Makedonivka), b: Arborichnus repetitus, field photo (Makedonivka), c: presumably horseshoe crab burrows similar to Radulichnus VOIGT, 1977 (shown by the black arrow) and Arborichnus repetitus (shown by the white arrow), GMLNU-5/4443 (Makedonivka), d: cluster of the trace fossils Arborichnus repetitus, GMLNU-5/4442 (Makedonivka), e: Arborichnus repetitus, GMLNU-5/7645 (unknown locality), f: Arborichnus repetitus, GMLNU-5/3530 (Skelevata Ravine), g: several trace fossils Arborichnus repetitus on sandstone slab surface, GMLNU-5/4440 (Makedonivka), h: enlarged trace fossils Arborichnus repetitus from Text-fig. 7g. Scale bars = 10 mm (b–h) and 20 mm (a). in Horseshoe Crab Trace Fossils Arborichnus Romano Et Meléndez, 1985 From The Bashkirian (Carboniferous) Of The Donets Basin, Ukraine