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Two Daspletosaurus species present in the Judith River Formation?
dinosaur man posted a topic in Questions & Answers
Hi I heard there are two Judith River Formation Daspletosaur species, an earlier one and older, is this true? Because the Daspletosaurus specimen Sir William being an older species from 79 to 77.5 mya and possibly D.torosus, D.honeri or another new species being the younger Daspletosaur species from 77.5 to 75 mya. Or is it just one Daspletosaurus in the Formation?- 6 replies
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I've got this rectangular rock, 6¼" by 4¼" (16 cm by 10¾ cm) and I have no idea what the fish on it can be. They appear to me to have settled separately on the bottom, not in a duel to the death fish fight. It might help to note the rock is about ½" (1¼ cm) thick. Oh, the larger, top fish is about 4¾" long and the shorter one underneath is 2¾" from head to tail. Note that the larger fish is not completely on the rock. I have no information about where this came from. It is from an estate and came to me with no identification or explanation. I tried to identify this myself but this type of fish is completely out of my league. Priscacara I can understand, trilobites I'm getting better at, but this I can't begin to get a handle on. Thank you everyone.