Mesozoic Anomopoda (Crustacea) from Mongolia

Material from the Early Cretaceous age collected 6 km west of the Hotont Somon (Mongolia) includes numerous impressions of Anomopoda. These show biramous segmented antennae and their setae, valves, head shields, mandibles, the distal part of the post-abdomen, claws and the gut containing food material. Prochydorus rotundus sp. nov., Archeoxus mirabilis sp. nov. and Archeoxus ventrosus sp. nov. are described and attributed to a new family Prochydoridae. The material demonstrates that the prochydorid-type of organization is geologically ancient.