PBDB Collection

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

Show authors, comments, and common names

unclassified
-	Acanthopterygii indet.¹⁵ Acanthopterygii indet.¹⁵
Malacostraca
Decapoda - Lyreididae	Lyreidus antarcticus¹⁰ Lyreidus antarcticus¹⁰ Feldmann and Zinsmeister 1984 crab
Chondrichthyes
Carcharhiniformes - Triakidae	Galeorhinus sp.⁹, Mustelus sp.⁹, Meridiogaleus cristatus n. gen. n. sp.⁹, Kallodentis rhytistemma n. gen. n. sp.⁹ Galeorhinus sp.⁹ de Blainville and Prévost 1816 school shark Mustelus sp.⁹ hound shark 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
Carcharhiniformes - Carcharhinidae	Abdounia mesetae n. sp.⁹, Abdounia richteri n. sp.⁹ Abdounia mesetae n. sp.⁹ Engelbrecht et al. 2017 requiem shark Abdounia richteri n. sp.⁹ Engelbrecht et al. 2017 requiem shark
Lamniformes - Cetorhinidae	Cetorhinus sp.⁶ Cetorhinus sp.⁶ de Blainville 1816 basking shark
Pristiophoriformes - Pristiophoridae	Pristiophorus laevis⁸ Pristiophorus laevis⁸ Engelbrecht et al. 2017 saw shark
Mammalia
Marsupialia -	? Marsupialia indet.¹¹ ? Marsupialia indet.¹¹ marsupial
Allotheria - Sudamericidae	cf. Sudamerica ameghinoi¹² 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.
Astrapotheria -	cf. Antarctodon sobrali³ cf. Antarctodon sobrali³ Bond et al. 2011 placental
Panameriungulata - Sparnotheriodontidae	Notolophus arquinotiensis⁴ 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
Polydolopimorphia -	Pujatodon ektopos n. gen. n. sp.¹³ Pujatodon ektopos n. gen. n. sp.¹³ Goin et al. 2020 metatherian
Polydolopimorphia - Polydolopidae	? Polydolopidae indet., Antarctodolops mesetaense n. sp.⁵, Polydolops dailyi, Polydolops seymoureinsis, Polydolops sp. ? Polydolopidae indet. Ameghino 1897 metatherian 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. Polydolops dailyi metatherian Polydolops seymoureinsis metatherian Polydolops sp. Ameghino 1897 metatherian sp. nov.
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).
Microbiotheria - Microbiotheriidae	Microbiotheriidae indet. Microbiotheriidae indet. Ameghino 1887 marsupial
Marsupialia -	? Dasyuromorphia indet. ? Dasyuromorphia indet. Gill 1872 marsupial
Tribosphenida - Derorhynchidae	Derorhynchidae indet.¹¹, Pauladelphys juanjoi¹¹, "Xenostylus peninsularis n. gen. n. sp." = Xenostylos peninsularis¹¹, Derorhynchus minutus n. sp.¹¹ Derorhynchidae indet.¹¹ Paula Couto 1962 marsupial MLP 94-111-15-11, an isolated lower left molar Pauladelphys juanjoi¹¹ Goin et al. 1999 marsupial MLP 96-I5-45, upper left molar (M?1) "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
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.
Marsupialia -	Didelphimorphia indet. Didelphimorphia indet. Gill 1872 marsupial
Aves
Odontopterygiformes - Pelagornithidae	Pelagornithidae indet.¹ Pelagornithidae indet.¹ Fürbringer 1888 bird
Charadriiformes -	Charadriiformes indet. Charadriiformes indet. Huxley 1867 shorebird
Procellariiformes - Procellariidae	Procellariidae indet. Procellariidae indet. Vigors 1825 petrel
Sphenisciformes -	Archaeospheniscus wimani, Anthropornis grandis¹⁴ Archaeospheniscus wimani Marples 1953 penguin Anthropornis grandis¹⁴ Wiman 1905 penguin
Sphenisciformes - Spheniscidae	Spheniscidae indet. Spheniscidae indet. Bonaparte 1831 penguin
Reptilia
Testudines -	Testudines indet.² Testudines indet.² Batsch 1788 turtle
Testudines - Dermochelyidae	cf. Psephophorus sp.⁷ 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)
Actinopteri
Spariformes - Sparidae	? Sparidae indet.¹⁵ ? Sparidae indet.¹⁵ Cuvier 1817
Perciformes -	Percoidei indet.¹⁵ Percoidei indet.¹⁵ Bleeker 1859 perch-like fish
Acanthomorphata - Haemulidae	? Haemulidae indet.¹⁵ ? Haemulidae indet.¹⁵ Gill 1885
Ophidiiformes - Ophidiidae	Hoplobrotula antipoda n. sp.¹⁵ Hoplobrotula antipoda n. sp.¹⁵ Schwarzhans et al. 2017
Beryciformes - Berycidae	Centroberyx sp.¹⁵ Centroberyx sp.¹⁵ Gill 1862
Gadiformes - Macruronidae	Macruronus eastmani n. sp.¹⁵ Macruronus eastmani n. sp.¹⁵ Schwarzhans et al. 2017
Gadiformes - Macrouridae	Coelorinchus balushkini n. sp.¹⁵, Coelorinchus nordenskjoeldi n. sp.¹⁵ Coelorinchus balushkini n. sp.¹⁵ Schwarzhans et al. 2017 grenadiers Coelorinchus nordenskjoeldi n. sp.¹⁵ Schwarzhans et al. 2017 grenadiers

¹Acosta Hospitaleche and Reguero 2020; ²Bona et al. 2010; ³Bond et al. 2011; ⁴Bond et al. 2006; ⁵Chornogubsky et al. 2009; ⁶Cione and Reguero 1998; ⁷de la Fuente et al. 1995; ⁸Engelbrecht et al. 2017; ⁹Engelbrecht et al. 2017; ¹⁰Feldmann and Wilson 1988; ¹¹Goin et al. 1999; ¹²Goin et al. 2006; ¹³Goin et al. 2020; ¹⁴Myrcha et al. 2002; ¹⁵Schwarzhans et al. 2017