Monte Hermoso Formation is a geological formation of the Pliocene that crops out prominently at its type locality along the coastal cliffs of Farola Monte Hermoso, in Buenos Aires Province, Argentina. This formation is recognized as the foundational basis for establishing the Montehermosan stage/age of the South American Land Mammal Ages (SALMA).Tomassini, Rodrigo L., et al. “Biostratigraphy and Biochronology of the Monte Hermoso Formation (Early Pliocene) at Its Type Locality, Buenos Aires Province, Argentina.” Journal of South American Earth Sciences, vol. 48, Dec. 2013, pp. 31–42. DOI.org (Crossref), https://doi.org/10.1016/j.jsames.2013.08.002.
Paleofauna Birds Taxa Species Presence Abundance Description Images NotesChunga Tonni, E. P. (1974). A new cariamid (Aves, Gruiformes) from the Upper Pliocene of Buenos Aires province. Ameghiniana 11 (4): 366–372. Buenos Aires.C. incerta A specimen consists of the distal end of a tibiotarsus. An early seriemaDryornisD. pampeanusAn Argentinian vultureFoetopterusF. ambiguus An early falconHeterorheaHeterorhea at Fossilworks.org H. dabbeneiMesembriornisM. milneedwardsi A Phorusrhacid formally named Hermosiornis australisProtorheaP. azarae An early rheaTinamisornis T. intermedius A tinamidae T. parvulusVulturV. gryphus
Mammals
Metatherians Taxa Species Presence Abundance Description Images NotesNotocynusN. hermosicus A borhyaenid ThylacosmilusT. atrox A thylacosmilidParahyaenodonP. argentinusA borhyaenid
Liptoterns Taxa Species Presence Abundance Description Images NotesEoauchenia E. primitiva A proterotheriidDiplasiotheriumD. robustum A proterotheriidPromacraucheniaP. antiqua
Rodents Taxa Species Presence Abundance Description Images NotesActenomysA. priscusAuliscomysA. formosusCaviodonC. australisEumysopsE. laeviplicatusNecromysN. bonaparteiParamyocastorP. diligensPhugatheriumP. cataclisticum PithanotomysP. columnaris
Cingulata
Taxa Species Presence Abundance Description Images NotesChorobates C. rescens C. villosissimusDoellotatus D. inornatusEleutherocercus E. antiquusHolozaedyusH. laevisculptusMacrochorobatesM. chapalmalensis A euphractine cingulatePlohophorusP. figuratus
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