アメリカ自然史博物館のインスタグラム(amnh) - 5月3日 08時00分

It's time for #TrilobiteTuesday! Every trilobite fossil tells a unique and often compelling tale. Whether it's a 500 million-year-old Hemirhodon amplipyge bearing a potentially fatal bite mark like the one pictured here, or a 450 million-year-old Primaspis crosotus appearing forever frozen amid a fossilized field of crinoid stems, each example of these primeval life forms possesses the capacity to provide a captured-in-time glimpse of a long-gone undersea kingdom. With a trilobite in hand and a healthy imagination at play, each of us can partake in a private sojourn back to a time when trilobites first filled the planet's oceans.

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