Sacaco (SAO horizon) (Miocene of Peru)

Where: Peru (15.6° S, 74.7° W: paleocoordinates 15.8° S, 73.3° W)

• coordinate estimated from map

• local area-level geographic resolution

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

• Muizon and Bellon (1986: 39394) suggest this is about 3.9 Ma: early late Pliocene according to Muizon et al 2004 (28320). Greater than 5.75 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: C. Muizon. 1978. Arctocephalus (Hydrarctos) lomasiensis, subgen. nov. et nov sp., un nouvel Otariidae du Mio-Pliocene de Sacaco. Bulletin de l'Institute Francais d'Etudes Andines 7(3-4):169-189 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46083: authorized by Mark Uhen, entered by Mark Uhen on 01.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Chondrichthyes
 Myliobatiformes - Myliobatidae
Myliobatis sp.6 Cuvier 1816 eagle ray
 Lamniformes - Otodontidae
"Procarcharodon megalodon" = Otodus megalodon6
"Procarcharodon megalodon" = Otodus megalodon6 Agassiz 1843 megalodon
 Lamniformes - Lamnidae
Carcharodon carcharias4 Linnaeus 1758 great white shark
 Carchariniformes - Carcharhinidae
Carcharhinus cf. egertoni6 Agassiz 1843 requiem shark
Carcharhinus cf. priscus6 Agassiz 1843 requiem shark
 Hexanchiformes - Hexanchidae
"Hexanchus gigas" = Notidanus gigas6
"Hexanchus gigas" = Notidanus gigas6 Sismonda 1857 cow shark
 Chimaeriformes - Callorhynchidae
Actinopteri
 Istiophoriformes - Xiphiidae
Xiphiorhynchus sp.6 Van Beneden 1871 sword fish
 Clupeiformes - Clupeoidei
Aves
 Ornithurae - Pelagornithidae
Pelagornis sp.1 Lartet 1857 bird
 Procellariiformes - Procellariidae
Procellariidae indet.6 Vigors 1825 petrel
Fulmarus sp.2 Stephens 1826 petrel
 Sphenisciformes - Spheniscidae
Spheniscidae indet.4 Bonaparte 1831 penguin
form 2
 Suliformes - Phalacrocoracidae
cf. Phalacrocorax sp.6 Brisson 1760 cormorant
 Suliformes - Sulidae
cf. Sula sp.6 Brisson 1760 booby
Reptilia
 Loricata -
Eusuchia indet.6 Huxley 1875 crocodilian
Mammalia
 Carnivora - Otariidae
Otariidae indet.4 eared seal
Hydrarctos lomasiensis n. gen. n. sp. Muizon 1978 eared seal
 Carnivora - Phocidae
Monachinae indet.6 Trouessart 1897 seal
form 2, 5
Piscophoca pacifica6 Muizon 1981 seal
Acrophoca longirostris6 Muizon 1981 seal
 Xenarthra - Megatheriidae
Megatheriidae indet.4 Gray 1821 edentate
Thalassocnus carolomartini n. sp.5 McDonald and Muizon 2002 edentate
probably 1 individual
 Cetacea -
Piscocetus sacaco n. gen. n. sp.8
Piscocetus sacaco n. gen. n. sp.8 Pilleri and Pilleri 1989 whale
 Cetacea - Balaenopteridae
Balaenopteridae indet.6 Gray 1864 rorqual
form3
Balaenoptera siberi3 Pilleri 1989 rorqual
 Cetacea - Cetotheriidae
Cetotheriidae indet.6 Brandt 1872 whale
 Cetacea - Kogiidae
Kogiidae indet.6 Miller 1923 pygmy sperm whale
form 2
 Cetacea - Physeteridae
Physeteridae indet.6 Gray 1821 sperm whale
form 2, 3
 Cetacea - Odobenocetopsidae
Odobenocetops leptodon n. sp.7 Muizon et al. 1999 toothed whale
 Cetacea - Delphinidae
cf. Delphinus sp.6 Linnaeus 1758 common dolphin
cf. Stenella sp.6 Gray 1866 dolphin
 Cetacea - Monodontidae
Delphinapterinae indet.6 Gill 1871 toothed whale
 Cetacea - Phocoenidae
Phocoenidae indet.4 Gray 1825 porpoise
Piscolithax longirostris6 Muizon 1983 porpoise