Abstract
Anomuran microcoprolites are preserved in the Late Cretaceous lowermost Navesink Formation in Monmouth County, New Jersey. These microcoprolites occur within lens-to cigar-shaped phosphatic clay masses that occasionally include fragments of anomuran appendages. Individual microcoprolites are pellet-or rod-shaped and morphologically similar in longitudinal and cross-section to fecal material excreted from the ventro-dorsal hindgut of modern anomurans. The association of these anomuran microcoprolites in situ with Ophiomorpha burrows and the decapod crustacean Protocallianassa provides a compelling association for the identity of their producer.
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