Some recent papers with free pdfs in Research Gate:
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Twenty Kayentapus minor trackways, found on the lower footprint level of the Culpeper Quarry (Stevensburg, Virginia), document diverse patterns of behavior by their trackmakers. These trackmakers were habitually bipedal, though on rare occasions they briefly reverted to quadrupedal locomotion. One trackway provides strong evidence for tracking behavior by its trackmaker. Another trackway shows strong evidence for the capture and consumption of prey. There is no evidence to indicate group or pairing behavior in these animals, even though broad directional preferences are apparent in these trackways due to the geometry of the lake margin environment across which they wandered. Stop-and-start walking behavior is an attribute of nearly all of these animals, and this behavior makes it possible to determine which foot was dominant in many of these trackmakers. Many of the behaviors displayed by these trackmakers bear strong similarity to behaviors seen in modern birds. This indicates that these behavior patterns were already deeply ingrained within the theropod lineage even as far back in time as the Late Triassic (Norian).
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Two dinosaur ichnotaxa, Irenesauripus glenrosensis and Ornithomimipus jaillardi, are added to the vertebrate ichnofauna of the Lower Cretaceous Patuxent Formation in the vicinity of Fredericksburg, Virginia. They raise to 10 the number of Patuxent Formation dinosaur ichnotaxa known from this state. Tracks from the Patuxent Formation previously assigned to Megalosauropus sp. are here reassigned to a new small tyrannosauroid ichnotaxon, Tyrannosauripus bachmani. Very small Brontopodus birdi sauropod tracks are documented that support the idea that the local Early Cretaceous sauropod dinosaur, Astrodon johnstoni, nested in this area. Two new dinosaur-track localities are documented, one of which is the likely source of dinosaur tracks that have been discovered in building stones at a number of historic sites in the Fredericksburg, Virginia region.
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Robert E. Weems and Spencer G. Lucas (2021)
The first record of vertebrate ichnofossils from The Norton Formation (Pennsylvanian, Middle Moscovian) in Southwestern Virginia, USA.
In: Lucas, S. G., Hunt, A. P. & Lichtig, A. J., 2021, Fossil Record 7. New Mexico Museum of Natural History and Science Bulletin 82: Â497-504
https://www.researchgate.net/publication/348578154_THE_FIRST_RECORD_OF_VERTEBRATE_ICHNOFOSSILS_FROM_THE_NORTON_FORMATION_PENNSYLVANIAN_MIDDLE_MOSCOVIAN_IN_SOUTHWESTERN_VIRGINIA_USAFive kinds of footprints have been recovered from the Middle Pennsylvanian Norton Formation in far southwestern Virginia. They are referred to cf. Batrachichnus salamandroides (a basal temnospondyl), cf. Limnopus heterodactylus (an eryopid temnospondyl), aff. Limnopus sp. (a large eryopoid or trematopid temnospondyl), Characichnos isp. (an amniote swimming trace), and Tetrapoda indet. This is the first vertebrate trace fossil assemblage reported from Pennsylvanian strata in Virginia.
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