Colhué Huapí Norte (Eocene of Argentina)

Where: Chubut, Argentina (45.1° S, 69.0° W: paleocoordinates 47.6° S, 59.3° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Middle Eocene (48.6 - 37.2 Ma)

• Barrancan SALMA, late Lutetian–Bartonian (~42-38 Ma) according to Woodburne et al. (2014)

Environment/lithology: terrestrial; lithology not reported

Size class: mesofossils

Collected by C. Ameghino in c. 1900

Primary reference: R. Cifelli. 1985. Biostratigraphy of the Casamayoran, Early Eocene of Patagonia. American Museum Novitates 2820:1-26 [J. Zijlstra/J. Zijlstra]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 176163: authorized by Jelle Zijlstra, entered by Jelle Zijlstra on 30.01.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Notoungulata - Isotemnidae
Thomashuxleya rostrata2 Ameghino 1901 notoungulate
MACN 10539, dentary P4-M3; some of MACN 10541, isolated teeth
"Anisolambda latidens n. sp." = Isotemnus latidens2 Ameghino 1901 notoungulate
MACN 10667, dentary m1-2 (type), dentary m2-3
Pleurostylodon modicus2 Ameghino 1897 notoungulate
some referred material of _Pleurostylodon plexus_
 Notoungulata - Notostylopidae
Homalostylops interlissus n. sp.1, Eostylops diversidens n. sp.1, "Notostylops murinus" = Notostylops murinus, "Notostylops ampullaceus n. sp." = Notostylops murinus1
Homalostylops interlissus n. sp.1 Ameghino 1901 notoungulate
MACN 10488, fragmentary edentulous symphyses
Eostylops diversidens n. sp.1 Ameghino 1901 notoungulate
MACN 10484, "Various much broken jaw fragments with parts of upper and lower teeth, probably deciduous molars."
"Notostylops murinus" = Notostylops murinus Ameghino 1897 notoungulate
"Notostylops ampullaceus n. sp." = Notostylops murinus1 Ameghino 1897 notoungulate
MACN 10506, cranium and left lower jaw with p3-m3, right m3, distal end of right humerus
 Notoungulata - Oldfieldthomasiidae
Oldfieldthomasia anfractuosa n. sp.2 Ameghino 1901 notoungulate
MACN 10746, maxilla with dP3-M2 (lectotype or type), right maxilla P2-3, right dentary m1-3
 Notoungulata - Notopithecidae
"Notopithecus adapinus" = Notopithecus adapinus, "Adpithecus secans" = Notopithecus adapinus2, "Infrapithecus diversus n. sp." = Notopithecus adapinus2
"Notopithecus adapinus" = Notopithecus adapinus Ameghino 1897 notoungulate
"Adpithecus secans" = Notopithecus adapinus2 Ameghino 1897 notoungulate
One referred specimen in Ameghino Collection
"Infrapithecus diversus n. sp." = Notopithecus adapinus2 Ameghino 1897 notoungulate
MACN 10838, dentary p2-4
 Ungulata - Didolodontidae
"Euprotogonia patagonica n. sp." = Ernestokokenia patagonica1, "Euprotogonia trigonalis n. sp." = Ernestokokenia trigonalis1
"Euprotogonia patagonica n. sp." = Ernestokokenia patagonica1 Ameghino 1901 eutherian
MACN 10687, upper molar, perhaps M2
"Euprotogonia trigonalis n. sp." = Ernestokokenia trigonalis1 Ameghino 1901 eutherian
MACN 10688, M1 or M2
 Ungulata - Trigonostylopidae
Albertogaudrya sp.2, "Albertogaudrya unica" = Albertogaudrya unica, "Albertogaudrya regia n. sp." = Albertogaudrya unica2, "Trigonostylops wortmani" = Trigonostylops wortmani, "Trigonostylops integer n. sp." = Trigonostylops wortmani2
Albertogaudrya sp.2 Ameghino 1901 eutherian
MACN 12002, dentary p3-m1
"Albertogaudrya unica" = Albertogaudrya unica Ameghino 1901 eutherian
"Albertogaudrya regia n. sp." = Albertogaudrya unica2 Ameghino 1901 eutherian
MACN 12014, broken m3 (lectotype), ?p1, ?p2, partial upper molar
"Trigonostylops wortmani" = Trigonostylops wortmani Ameghino 1897 eutherian
"Trigonostylops integer n. sp." = Trigonostylops wortmani2 Ameghino 1897 eutherian
MACN 10643, upper molar, lectotype; another upper molar and associated P2-3. Said by Simpson (1967b:75, ref. 57943) to be from C.H. = Gran Barranca, but Simpson (1967a:224, ref. 10312) lists the type locality as "North of Colhué-Huapi".
 Sparassodonta -
Procladosictis erecta n. sp.1 Ameghino 1902 metatherian
MACN 10328, lower premolar, holotype
 Sparassodonta - Borhyaenidae
Nemolestes spalacotherinus n. gen. n. sp.1 Ameghino 1902 metatherian
MACN 10330, "tip of canine and two broken lower molars, not associated and of somewhat different character"
 Sparassodonta - Proborhyaenidae
Arminiheringia auceta n. sp.3 Ameghino 1902 metatherian
Syntypes: MACN 10972, facial part of skull with C, crowns of left P3 and M2-3 and right P1-M4; MACN 10970, mandible with crowns of left c, p1-3, m2-4, right c, p1, p3-4. Both specimens may represent the same individual.