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meaning: "first Stephanus"
Named By: T. D. A. Cockerell in 1906
Time Period: Late Eocene
Location: USA, Colorado - Florissant Formation
Size: 9.5 millimetres long
Diet: Insectivore
Fossil(s): Partial remains of a female
Classification: | Arthropoda | Insecta | Hymenoptera | Stephanidae |

Protostephanus is an extinct genus of crown wasp in the Hymenoptera family Stephanidae known from an Eocene fossil found in the United States of America. The genus contains a single described species, Protostephanus ashmeadi placed in the stephanid subfamily Stephaninae.

Read more about Protostephanus at Wikipedia
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