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Harpillaenus rossi
Taxonomy
Harpillaenus rossi was named by Fortey and Droser (1999). Its type specimen is USNM 167216a, a cephalon/head (cranidium), and it is a 3D body fossil. Its type locality is D1968 CO. Meiklejohn mud-mound, which is in a Whiterockian reef, buildup or bioherm limestone in the Antelope Valley Formation of Nevada.