PBDB Collection

Río Gallegos (Miocene of Argentina)

Also known as Killik Aike, Río Gallegos

Where: Santa Cruz, Argentina (51.6° S, 69.4° W: paleocoordinates 52.2° S, 63.7° W)

• coordinate stated in text

• local area-level geographic resolution

When: Santa Cruz Formation, Santacrucian (17.5 - 16.3 Ma)

• formation-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Primary reference: S. F. Vizcaíno, R. F. Kay, and M. S. Bargo. 2012. Background for a paleoecological study of the Santa Cruz Formation (late Early Miocene) on the Atlantic Coast of Patagonia. In S. F. Vizcaíno, R. F. Kay, M. S. Bargo (eds.), Early Miocene Paleobiology in Patagonia: High-Latitude Paleocommunities of the Santa Cruz Formation 1-22 [J. Zijlstra/J. Zijlstra/J. Zijlstra]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 176590: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 17.02.2016, edited by Grace Varnham and Miranta Kouvari

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Mammalia
Astrapotheria - Astrapotheriidae	Astrapotherium magnum⁶ Astrapotherium magnum⁶ Owen 1853 placental AMNH 9278, cranium and mandible
Notoungulata - Interatheriidae	Protypotherium cavum¹², Protypotherium australe⁶, "Protypotherium attenuatum" = Protypotherium praerutilum⁶, "Interatherium robustum" = Interatherium extensus⁶ Protypotherium cavum¹² notoungulate AMNH 9245. endocraneum studied also by Simpson 1933 and Radinsky 1981 Protypotherium australe⁶ Moreno 1882 notoungulate AMNH 9565, cranium and mandible ("Río Gallegos"); YPM-VPPU 15340, femur, tibia; 15659, femur, tibia; 15828, cranium, mandible, humerus, ulna; 15892, humerus ("Killik Aike, Río Gallegos") "Protypotherium attenuatum" = Protypotherium praerutilum⁶ Ameghino 1887 notoungulate YPM-VPPU 15341, postcrania; 15665, cranium ("Killik Aike, Río Gallegos") "Interatherium robustum" = Interatherium extensus⁶ Fernández et al. 2023 notoungulate AMNH 9483, mandible
Notoungulata - Hegetotheriidae	Pachyrukhos moyani⁶, Hegetotherium mirabile⁶ Pachyrukhos moyani⁶ Ameghino 1885 notoungulate YPM-VPPU 15743, cranium; 15744, cranium, mandible ("Killik Aike, Río Galllegos") Hegetotherium mirabile⁶ Ameghino 1887 notoungulate YPM-VPPU 15431, femur, tibia; 15542, cranium, mandible, humerus, ulna ("Killik AIke, Río Gallegos")
Notoungulata - Toxodontidae	Nesodon sp.⁶, Adinotherium ovinum⁶ Nesodon sp.⁶ Owen 1846 notoungulate AMNH 9168, cranium, mandible; 9553, ulna, tibia ("Río Gallegos") Adinotherium ovinum⁶ Owen 1846 notoungulate AMNH 9571, cranium
Panameriungulata - Proterotheriidae	Tetramerorhinus sp.⁷, Tetramerorhinus cingulatum⁶, Tetramerorhinus lucarius⁶, Thoatherium minusculum⁷, "Anisolophus australis" = Proterotherium australe⁶ Tetramerorhinus sp.⁷ Ameghino 1894 placental YPM PU 15368 Tetramerorhinus cingulatum⁶ Ameghino 1891 placental YPM-VPPU 15436, mandible ("Killik Aike, Río Gallegos"); 15732, mandible ("Río Gallegos") Tetramerorhinus lucarius⁶ Ameghino 1894 placental YPM-VPPU 15722, mandible ("Killik Aike, Río Gallegos") Thoatherium minusculum⁷ Ameghino 1887 placental YPM PU 15721 "Anisolophus australis" = Proterotherium australe⁶ Burmeister 1879 placental YPM-VPPU 15368, cranium ("Killik Aike, Río Gallegos")
Rodentia - Acaremyidae	Acaremys major n. sp.³, Pseudoacaremys kramarzi³ Acaremys major n. sp.³ Scott 1905 caviomorph YPM PU15366, skull ("Killik-Aike") Pseudoacaremys kramarzi³ Arnal and Vucetich 2015 caviomorph YPM PU 15872, maxillaries ("Killik-Aike")
Primates - Homunculidae	Homunculus patagonicus¹⁰ Homunculus patagonicus¹⁰ Ameghino 1891 monkey The holotype of H. patagonicus (MACN-A 634) was collected by Carlos Ameghino from the north shore of the estuary of the Rio Gallegos but got lost.
Megatherioidea -	"Hapalops rectangularis n. sp." = Schismotherium rectangularis⁴ "Hapalops rectangularis n. sp." = Schismotherium rectangularis⁴ Ameghino 1887 edentate AMNH 9222, mandible and postcrania, holotype
Megatherioidea - Megalonychidae	Megalonychidae indet.⁴, Hapalops sp.⁴, Hapalops elongatus⁴ Megalonychidae indet.⁴ Gervais 1855 edentate AMNH 94754, postcrania ("Río Gallegos") Hapalops sp.⁴ Ameghino 1887 edentate YPM-VPPU 15618, postcrania ("Killik Aike") Hapalops elongatus⁴ Ameghino 1891 edentate YPM-VPPU 15597, skull and mandible ("Killik Aike")
Megatherioidea - Megatheriidae	Prepotherium potens⁴ Prepotherium potens⁴ Ameghino 1891 edentate YPM-VPPU 15345, postcrania ("Killik Aike")
Cingulata - Chlamyphoridae	Prozaedyus exilis¹³ Prozaedyus exilis¹³ Ameghino 1887 edentate YPM-VPPU 15579, skull and postskeleton
Theriamorpha -	Adiastaltus habilis⁹, Stegotherium tauberi¹³ Adiastaltus habilis⁹ Ameghino 1893 edentate MACN A-5801, distal humerus Stegotherium tauberi¹³ Gonzalez and Scilalto-Yané 2008 edentate YPM-VPPU 15565, skull, vertebrae, pes, carapace
Sparassodonta -	Sipalocyon gracilis¹¹, Cladosictis patagonica⁸ Sipalocyon gracilis¹¹ Ameghino 1887 metatherian YPM-VPPU 153737 ("Killik Aike") Cladosictis patagonica⁸ Ameghino 1887 metatherian MACN 705, left maxillary P3-M2, isolated ?P2, C fragments ("Río Gallegos")
Microbiotheria - Microbiotheriidae	Microbiotherium tehuelchum¹ Microbiotherium tehuelchum¹ Ameghino 1887 marsupial coll. H. Felton ("Killik-Aike")
Paucituberculata - Palaeothentidae	Acdestis oweni⁵, Palaeothentes aratae¹, Palaeothentes intermedius⁵, Palaeothentes minutus¹ Acdestis oweni⁵ Ameghino 1887 marsupial Palaeothentes aratae¹ Moreno 1882 marsupial coll. B. Brown Palaeothentes intermedius⁵ Ameghino 1887 marsupial Palaeothentes minutus¹ Ameghino 1887 marsupial coll. B. Brown ("Río Gallegos"), H. Felton ("Killik-Aike"): MACn-A 5619-5639a-I, dentaries and postcrania
Aves
Anseriformes -	Brontornis burmeisteri² Brontornis burmeisteri² Moreno and Mercerat 1891 waterfowl

¹Abello et al. 2012; ²Alvarenga and Holfing 2003; ³Arnal and Vucetich 2015; ⁴Bargo et al. 2012; ⁵Bown and Fleagle 1993; ⁶Cassini et al. 2012; ⁷MacPhee et al. 2021; ⁸Marshall 1981; ⁹McDonald et al. 2008; ¹⁰Perry et al. 2014; ¹¹Prevosti et al. 2012; ¹²Quiroga 1988; ¹³Vizcaíno et al. 2012