Bohemura jahni Jaekel, 1903 (photo taken by V. Petr)
A specimen of the Bohemian protasterid brittlestar trying
to feed on Sphenothallus sp. comes from the Middle Ordovician,
Berounian (Caradocian), Zahorany Formation.
See the article: Petr, V. (1989): Revision of
morphology and ecology of Bohemura jahni Jaekel, 1903 (Ophiuroidea,
Protasteridae) from Bohemian Middle Ordovician. - Sbornik
Narodniho muzea, Rada B, 45 (1): 1-20. Praha.