“Pfeilschwankrebs” (Horseshoe Crabs), 1916
Collector Card from Tiere der Urwelt (Animals of the Prehistoric World) Series I
https://commons.wikimedia.org/wiki/File:Limulus.jpg
Horseshoe crabs have been swimming in earth’s oceans for a long time…their fossil record goes back at least 480 million years! This card illustrates the Atlantic Horseshoe Crab (Limulus polyphemus), one of four still-living species and the only one native to the Americas.
(Also, their common name is misleading — they are not true crabs or even crustaceans, but rather chelicerates, making them closer relatives of arachnids and sea spiders.)
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