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NTArenicolites
 Chondrites ichnofossils
 Corophioides
 Cruziana
 Diplocraterion
 Nereites
 Palaeophycus
 Planolites
 Rhizocorallium
 Rusophycus
 Skolithos
 Teichichnus
 Thalassinoides
 Trypanites
 Zoophycos
RTbioerosion
 Invertebrata
 morphology
 biogenic structures
 fossils
 burrows
 casts
 borings
 ichnofabric
 coprolites
 tracks
 trails
 chemical fossils
 fossilization
 lebensspuren
 Collenia
 Ophiomorpha
 Ophiomorpha nodosa
SNAs of 1981, is not to be used under sedimentary structures, and refers only to studies in which the emphasis is paleontology, not sedimentary petrology. For ichnofossils as components of sediments or sedimentary rocks, use lebensspuren. From 1978-1980, se