IAA 1/90 (Eocene of Antarctica)

Where: Antarctica (64.2° S, 56.7° W: paleocoordinates 63.4° S, 63.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Telm 5 Member (La Meseta Formation), Ypresian (56.0 - 47.8 Ma)

• Cucullaea I allomember of the La Meseta Formation (this is the alternative division system of the La Meseta Fm. to the TELM system); Bona et al 2010 identify the age as Middle Eoecene

• member-level stratigraphic resolution

Environment/lithology: estuary or bay; lithology not reported

Size class: macrofossils

Primary reference: M. S. Bargo and M. A. Reguero. 1998. Annotated catalogue of the fossil vertebrates from Antarctica housed in the Museo de la Plata, Argentina. I. Birds and Land Mammals from La Meseta Formation (Eocene - Early Oligocene). Associacion Paleontologica Argentina, Publicacion Especial 5:211-221 [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 100414: authorized by Mark Uhen, entered by Mark Uhen on 09.12.2010, edited by Jelle Zijlstra and Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Chondrichthyes
 Pristiophoriformes - Pristiophoridae
Pristiophorus laevis8 Engelbrecht et al. 2017 saw shark
 Carcharhiniformes - Carcharhinidae
Abdounia richteri n. sp.9 Engelbrecht et al. 2017 requiem shark
Abdounia mesetae n. sp.9 Engelbrecht et al. 2017 requiem shark
 Carcharhiniformes - Triakidae
Meridiogaleus cristatus n. gen. n. sp.9 Engelbrecht et al. 2017 hound shark
Kallodentis rhytistemma n. gen. n. sp.9 Engelbrecht et al. 2017 hound shark
Galeorhinus sp.9 de Blainville and Prévost 1816 school shark
Mustelus sp.9 hound shark
 Lamniformes - Cetorhinidae
Cetorhinus sp.6 de Blainville 1816 basking shark
Reptilia
 Testudines -
Testudines indet.2 Batsch 1788 turtle
 Testudines - Dermochelyidae
cf. Psephophorus sp.7 von Meyer 1847 leatherback
an isolated epithecal plate; MLP 90-1-20-270/273, two isolated plates (IAA 1/90, TELM 5); MLP 95-1-10-11/12/13, fragments of epithecal plates (IAA 1/90, TELM 5)
Aves
 Procellariiformes - Procellariidae
Procellariidae indet. Vigors 1825 petrel
 Sphenisciformes -
Anthropornis grandis14 Wiman 1905 penguin
Archaeospheniscus wimani Marples 1953 penguin
 Sphenisciformes - Spheniscidae
Spheniscidae indet. Bonaparte 1831 penguin
 Odontopterygiformes - Pelagornithidae
Pelagornithidae indet.1 Fürbringer 1888 bird
 Charadriiformes -
Charadriiformes indet. Huxley 1867 shorebird
Mammalia
 Marsupialia -
 Polydolopimorphia -
Pujatodon ektopos n. gen. n. sp.13
Pujatodon ektopos n. gen. n. sp.13 Goin et al. 2020 metatherian
 Polydolopimorphia - Prepidolopidae
Perrodelphys coquinense n. gen. n. sp.11
Perrodelphys coquinense n. gen. n. sp.11 Goin et al. 1999 metatherian
MLP 96-1-5-11, an isolated left lower molar (m?l; Figs. 8A-C).
 Polydolopimorphia - Polydolopidae
? Polydolopidae indet. Ameghino 1897 metatherian
Polydolops dailyi metatherian
Polydolops sp. Ameghino 1897 metatherian
sp. nov.
Antarctodolops mesetaense n. sp.5 Chornogubsky et al. 2009 metatherian
Holotype. MLP 96-I-5-12, a right dentary with p3-m3 (Fig. 5e). Hypodigm. MLP 92- II-2-1, an isolated left m2; MLP 94-III-15-13a, an isolated left m1; MLP 94-III-15-13b, an isolated left m3; MLP 96- I-5-46, an isolated right m3; MLP 95-I-10-4, an isolated left M1 (Fig. 5f). Tentatively referred specimen. MLP 90-I-20-4, an isolated P3.
 Microbiotheria - Microbiotheriidae
Microbiotheriidae indet. Ameghino 1887 marsupial
 Marsupialia -
? Dasyuromorphia indet. Gill 1872 marsupial
Didelphimorphia indet. Gill 1872 marsupial
 Tribosphenida - Derorhynchidae
Derorhynchidae indet.11, "Xenostylus peninsularis n. gen. n. sp." = Xenostylos peninsularis11, Derorhynchus minutus n. sp.11, Pauladelphys juanjoi11
Derorhynchidae indet.11 Paula Couto 1962 marsupial
MLP 94-111-15-11, an isolated lower left molar
"Xenostylus peninsularis n. gen. n. sp." = Xenostylos peninsularis11 Goin et al. 1999 marsupial
MLP 94-111-15-10, an isolated upper right mola
Derorhynchus minutus n. sp.11 Goin et al. 1999 marsupial
MLP 96-1-5-44, a fragment of the right horizontal ramus of the dentary, incomplete, with m2-3
Pauladelphys juanjoi11 Goin et al. 1999 marsupial
MLP 96-I5-45, upper left molar (M?1)
 Tribosphenida -
Marambiotherium glacialis n. gen. n. sp.11
Marambiotherium glacialis n. gen. n. sp.11 Goin et al. 1999 marsupial
MLP 95-1-10-1; a fragment of a right mandibular ramus with a complete m4 (Figs. 9A-C) and the posterior alveolus of m3.
 Panameriungulata - Sparnotheriodontidae
Notolophus arquinotiensis4 Bond et al. 2006 placental
MLP 90-I-20-1, left upper molariform (M1 or M2?), MLP 01-I-1-1, right m3, MLP 90-I-20-3, right I3?, MLP 90-I-20-5, left upper premolar incomplete (P2 or P3?), MLP 91-II-4-5, right upper premolar (P1), MLP 94-III-15-3, left lower incisive
 Astrapotheria -
cf. Antarctodon sobrali3 Bond et al. 2011 placental
 Allotheria - Sudamericidae
cf. Sudamerica ameghinoi12 Scillato-Yane and Pascual 1984 mammal
MLP 95-I-10-5 (Figs 2 A–C & 3A, B), anterior part of a left dentary with the rodent-like incisor partially preserved. Tentatively referred: MLP 96-I-5-47, an isolated ?left upper incisor (Fig. 3A, B) broken at its proximal end.
Actinopteri
 Spariformes - Sparidae
? Sparidae indet.15 Cuvier 1817
 Perciformes -
Percoidei indet.15 Bleeker 1859 perch-like fish
 Acanthomorphata - Haemulidae
? Haemulidae indet.15 Gill 1885
 Ophidiiformes - Ophidiidae
Hoplobrotula antipoda n. sp.15 Schwarzhans et al. 2017
 Beryciformes - Berycidae
Centroberyx sp.15 Gill 1862
 Gadiformes - Macruronidae
Macruronus eastmani n. sp.15 Schwarzhans et al. 2017
 Gadiformes - Macrouridae
Coelorinchus nordenskjoeldi n. sp.15 Schwarzhans et al. 2017 grenadiers
Coelorinchus balushkini n. sp.15 Schwarzhans et al. 2017 grenadiers
Malacostraca
 Decapoda - Lyreididae
Lyreidus antarcticus10 Feldmann and Zinsmeister 1984 crab