Sud Sacaco, Montemar (Miocene of Peru)

Also known as MTM

Where: Peru (15.6° S, 74.7° W: paleocoordinates 15.8° S, 73.4° W)

• coordinate estimated from map

When: Pisco Formation, Messinian (7.2 - 5.3 Ma)

• 4.5-6 Ma (Stucchi & Urbina, 2004); 7.3 - 7.0 Ma (Ehret et al 2012)

• group of beds-level stratigraphic resolution

Environment/lithology: paralic; diatomaceous siltstone

• "a littoral paleoenviroment with protected beaches and reefs exposed to marine sediments" (Stucchi and Emslie 2005), high sedimentation rate, shallow-to-deep shelf, upwelling

Size class: macrofossils

Preservation: original phosphate

Collection methods: surface (in situ),

Primary reference: R. Marocco and C. d.e. Muizon. 1988. Los vertebrados del Neogeno de La Costa Sur del Perú: Ambiente sedimentario y condiciones de fosilización. Bulletin de l'Institut Frances d'Etudes Andines 17(2):105-117 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46084: authorized by Mark Uhen, entered by Mark Uhen on 01.01.2005, edited by John Alroy

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Odontaspidida - Carcharodontidae
"Isurus hastalis" = Cosmopolitodus hastalis
"Isurus hastalis" = Cosmopolitodus hastalis Agassiz 1843 elasmobranch
 Myliobatiformes - Myliobatidae
Myliobatis sp.6 Cuvier 1816 eagle ray
 Lamniformes - Otodontidae
"Procarcharodon megalodon" = Otodus megalodon6
"Procarcharodon megalodon" = Otodus megalodon6 Agassiz 1843 megalodon
Also studied in Pimiento and Balk
Actinopteri
 Clupeiformes - Clupeoidei
Aves
 Charadriiformes - Scolopacidae
Tringinae indet.2 Gray 1840 snipe
 Cathartiformes - Cathartidae
Perugyps diazi n. gen. n. sp.10
Perugyps diazi n. gen. n. sp.10 Stucchi and Emslie 2005 New World vulture
 Ornithurae - Pelagornithidae
Pelagornithidae indet.1 Fürbringer 1888 bird
 Sphenisciformes - Spheniscidae
Spheniscidae indet.6 Bonaparte 1831 penguin
form 2
Spheniscus urbinai8 Stucchi 2002 penguin
Spheniscus megaramphus n. sp.11 Stucchi et al. 2003 penguin
 Suliformes - Phalacrocoracidae
cf. Phalacrocorax sp.6 Brisson 1760 cormorant
 Suliformes - Sulidae
cf. Sula sp.6 Brisson 1760 booby
Sula magna n. sp.9 Stucchi 2003 booby
Sula aff. variegata9 Tschudi 1843 Peruvian booby
Sula sulita n. sp.9 Stucchi 2003 booby
Morus peruvianus n. sp.9 Stucchi 2003 gannet
Reptilia
 Loricata -
Eusuchia indet.6 Huxley 1875 crocodilian
 Crocodylia -
Piscogavialis jugaliperforatus n. gen. n. sp.3 Kraus 1998 crocodilian
SMNK 1282 PAL - holotype (skull, mandible and postcranial material)
Mammalia
 Ferae -
Carnivora indet.6 Bowditch 1821 carnivoran
terrestrial
 Carnivora - Phocidae
Phocidae indet. Gray 1821 seal
Monachinae indet.6 Trouessart 1897 seal
form 2
Acrophoca sp.6 Muizon 1981 seal
 Xenarthra - Megatheriidae
Megatheriidae indet. Gill 1872 edentate
Thalassocnus natans n. gen. n. sp.7 Muizon and McDonald 1995 edentate
Muizon & McDonald 1995 stated this taxon was from the SAS horizon, but this was later changed to the MTM horizon in later publications (McDonald & Muizon, 2002)
 Mysticeti - Balaenopteridae
Balaenopteridae indet.6 Gray 1864 rorqual
form 2
 Mysticeti - Cetotheriidae
Cetotheriidae indet. Brandt 1872 whale
 Odontoceti - Physeteridae
Physeteridae indet.5 Gray 1821 sperm whale
form 2
 Odontoceti -
Acrophyseter deinodon n. gen. n. sp.4
Acrophyseter deinodon n. gen. n. sp.4 Lambert et al. 2008 toothed whale
 Delphinoidea - Phocoenidae
Phocoenidae indet. Gray 1825 porpoise
cf. Piscolithax sp.6 Muizon 1983 porpoise