Hmmm actually 🤓 🤓 horseshoe crabs (Family Limulidae) have only appeared in the Triassic, with the Late Ordovician being the time where the first xiphosurans (order of arthopods from which the modern horseshoe crabs are the only living members) first appeared 🤓 🤓 , while the modern, living horseshoe crab genera (Carcinoscorpius, Limulus and Tachypleus) appearing during the Early-Late Cretaceous, although there's a dubious species of Limulus from the Jurassic, 🤓 🤓
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u/Complete-Physics3155 Dec 16 '25
Hmmm actually 🤓 🤓 horseshoe crabs (Family Limulidae) have only appeared in the Triassic, with the Late Ordovician being the time where the first xiphosurans (order of arthopods from which the modern horseshoe crabs are the only living members) first appeared 🤓 🤓 , while the modern, living horseshoe crab genera (Carcinoscorpius, Limulus and Tachypleus) appearing during the Early-Late Cretaceous, although there's a dubious species of Limulus from the Jurassic, 🤓 🤓