Tagasi otsingusse
Alpert & Moore, 1975

Lower Cambrian trace fossil evidence for predation on trilobites

Alpert, S. P., Moore, J. N.
DOI
DOI10.1111/j.1502-3931.1975.tb00926.x
Aasta1975
AjakiriLethaia
Köide8
Number3
Leheküljed223-230
Tüüpartikkel ajakirjas
Keelinglise
Id6450

Abstrakt

Predation upon trilobites previously has been inferred from large coprolites containing trilobite fragments, and from specimens of trilobites with healed wounds. The discovery of large burrows (Dolopichnus gulosus, n. ichnogen., n. ichnosp.) in micritic quartz arenite of the Lower Cambrian Poleta Formation in Esmeralda County, Nevada, suggests that sea anemones preyed upon trilobites. Dolopichnus n. ichnogen., vertical cylindrical burrows with a central cylindrical core, is interpreted as dwelling burrows of sea anemones. In the specimens studied, the core contains coarser-grained material, and in one series of burrows, is composed of trilobitc fragments and micrite pellets. cemented with sparite. The central cylinder is interpreted to be a cast of the sea anemone's coelenteron, which in some specimens contains stomach contents.

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