Zoophycos Nereites 8 South America 6 Trace fossils 6 trace fossil 6 Ammonites 4 Anagaudryceras 4 Andes 4 Arthropoda 4 Bivalvia 4 Clay-slate formation 4 Coniacian 4 Cretaceous 4 Diplomoceras 4 Fuegian andes 4 Gondwana 4 Inoceramid 4 Inoceramidae 4 Inoceramus 4 Pachydiscus 4 ammonite 4 biostratigraphy 4 bivalve 4 mudstone 4 new record 4 Aplacophora 2 Arenicolites 2 Argentina 2 Cruziana 2 Dictyodora 2