Aguada de Lomas (Miocene of Peru)

Where: Arequipa, Peru (15.5° S, 74.8° W: paleocoordinates 15.9° S, 72.7° W)

• coordinate stated in text

• local area-level geographic resolution

When: Pisco Formation, Tortonian (11.6 - 7.2 Ma)

• 7-8.8 Ma (Stucchi & Urbina, 2004), Huayquerian, ca. 8 Ma (Muizon & DeVries, 1985), between 7.3 and 7.46 (Ehret et al 2012).

•The Pisco Formation at Agua de Lomas has been dated to 8.0–7.0 Ma based on K-Ar dating [74, 75]. (Marx & Fordyce, 2015).

•~8.8 and 7.9 Ma for rocks associated to the AGL vertebrate-level (Ochoa et al., 2022)

• bed-level stratigraphic resolution

Environment/lithology: foreshore; diatomaceous siltstone

• AGL horizon, shore environment containing protected beaches and reefs. The protected beaches and reefs are exposed to marine currents. There is a high sedimentation rate, with a shallow-to-deep shelf and upwelling.

Size class: macrofossils

Preservation: original phosphate

Primary reference: C. Muizon and T. J. DeVries. 1985. Geology and paleontology of late Cenozoic marine deposits in the Sacaco area (Peru). Geologische Rundschau 74(3):547-563 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45485: authorized by Mark Uhen, entered by Nick Pyenson on 25.10.2004, edited by Mark Uhen, Carlos Peredo and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Aves
 Odontopterygiformes - Pelagornithidae
Pelagornis sp.4 Lartet 1857 bird
 Sphenisciformes - Spheniscidae
Spheniscidae indet. Bonaparte 1831 penguin
form 2
Spheniscus urbinai17 Stucchi 2002 penguin
 Suliformes - Phalacrocoracidae
cf. Phalacrocorax sp. Brisson 1760 cormorant
 Suliformes - Sulidae
cf. Sula sp. Brisson 1760 booby
Sula aff. variegata18 Tschudi 1843 Peruvian booby
Reptilia
 Crocodylia -
Crocodylia indet.16 Owen 1842 crocodilian
MUSM 4010 (AGL817), MUSM 2606 (AGL765), MUSM 4011, MUSM n/n (AGL953), MUSM 4012, MUSM 4013 (AGL954)
 Crocodylia - Gavialidae
Sacacosuchus cordovai16 Salas-Gismondi et al. 2022 crocodilian
Piscogavialis sp.16 Kraus 1998 crocodilian
MUSM 4008 (AGL816), MUSM 4009 (AGL952) and MUSM 2528
Mammalia
 Megatherioidea - Nothrotheriidae
Thalassocnus antiquus n. sp.12 Muizon et al. 2003 edentate
 Megatherioidea - Megatheriidae
Megatheriidae indet.8 Gray 1821 edentate
 Sirenia - Dugongidae
? Nanosiren sp.6 Domning and Aguilera 2008 dugong
 Placentalia -
Carnivora indet. Bowdich 1821 carnivoran
terrestrial
 Carnivora - Phocidae
Monachinae indet. Trouessart 1897 seal
form 2 & form 4
Australophoca changorum n. gen. n. sp.19 Valenzuela-Toro et al. 2016 seal
Acrophoca sp. Muizon 1981 seal
n. sp.
 Cetacea - Phocoenidae
Phocoenidae indet.8 Gray 1825 porpoise
cf. Piscolithax sp. Muizon 1983 porpoise
Lomacetus ginsburgi n. gen. n. sp.10 Muizon 1986 porpoise
 Cetacea - Pontoporiidae
Piscorhynchus aenigmaticus n. gen. n. sp.15 Pilleri and Siber 1989 toothed whale
Brachydelphis jahuayensis7 Lambert and Muizon 2013 toothed whale
 Cetacea - Eurhinodelphinidae
"Eurhinodelphidae indet." = Eurhinodelphinidae14
"Eurhinodelphidae indet." = Eurhinodelphinidae14 Abel 1901 toothed whale
 Cetacea - Kogiidae
Scaphokogia cochlearis n. gen. n. sp.11, Koristocetus pescei n. gen. n. sp.5
Scaphokogia cochlearis n. gen. n. sp.11 Muizon 1988 pygmy sperm whale
Koristocetus pescei n. gen. n. sp.5 Collareta et al. 2017 pygmy sperm whale
 Cetacea - Balaenopteridae
Balaenopteridae indet.8 Gray 1864 rorqual
sp. 2
Archaebalaenoptera eusebioi n. sp.2 Bisconti et al. 2022 rorqual
Incakujira anillodefuego n. gen. n. sp.9 Marx and Kohno 2016 rorqual
Balaenoptera siberi n. sp.13 Pilleri 1989 rorqual
 Cetacea - Cetotheriidae
Cetotheriidae indet.8 Brandt 1872 whale
Miocaperea pulchra n. gen. n. sp.1 Bisconti 2012 pygmy right whale
Piscobalaena nana3 Pilleri and Siber 1989 whale
Actinopteri
 Acanthopteri - Sphyraenidae
 Clupeiformes - Clupeoidei
 Siluriformes - Ariidae
Ariidae indet. Berg 1958 Ariid catfish
Chondrichthyes
 Lamniformes - Lamnidae
"Isurus cf. oxyrhynchus" = Isurus oxyrinchus, "Isurus hastalis" = Carcharodon hastalis8
"Isurus cf. oxyrhynchus" = Isurus oxyrinchus Rafinesque 1810 mackerel shark
"Isurus hastalis" = Carcharodon hastalis8 Agassiz 1838 white shark
 Lamniformes - Otodontidae
"Procarcharodon megalodon" = Otodus megalodon
"Procarcharodon megalodon" = Otodus megalodon Agassiz 1835 megalodon
 Myliobatiformes - Myliobatidae
Myliobatis sp. Cuvier 1816 eagle ray