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Dinosaurs (Reptilia, Archosauria) at Museo de La Plata, Argentina: annotated catalogue of the type material and Antarctic specimens

Alejandro Otero and Marcelo Reguero

Plain Language Abstract

This contribution encloses the type material of the dinosaurs housed at the Division of Vertebrate Paleontology of the La Plata Museum, Argentina. The catalogue also includes Antarctic specimens. The collections have 13 type specimens of non-avian dinosaurs, which include eight sauropods, one theropod, one ornithischian and three ichnotaxa. There are also four Antarctic specimens, one of which is a holotype, whereas other corresponds to the first sauropod dinosaur registered for that continent. This is the first time that a catalogue for dinosaurs is made at the Museo de La Plata.

Resumen en Español

In Progress

Traducción: Miguel Company

Résumé en Français

Les dinosaures (Reptilia, Archosauria) du Musée de La Plata, en Argentine: catalogue annoté des spécimens types et des spécimens de l'Antarctique

Un catalogue commenté et illustré des dinosaures non-aviens logés au Musée de La Plata, en Argentine, est présenté. Celui-ci représente le premier catalogue commenté des dinosaures du Musée de La Plata à être publié. Celui-ci comprend les spécimens types ainsi que les spécimens de l'Antarctiques. L'arrangement des spécimens a été faite d'une manière phylogénétique, comprenant les rangs systématiques, les spécimens types, les spécimens référés, l'emplacement géographique et stratigraphique, et les commentaires et remarques, si nécessaire. Un total de treize spécimens types de dinosaures non-aviens sont logés dans les collections du Museo de La Plata, comprenant huit sauropodes, un théropode, un ornithischiens et trois ichnofossiles. Il y a quatre spécimens de l'Antarctiques, dont un est un holotype, tandis qu'un autre correspond au premier dinosaure sauropode enregistré sur ce continent.

Mots clés: Saurischia; Ornithischia; Holotype; Lectotype, Patagonie, Antarctique

Translator: Kenny Travouillon

Deutsche Zusammenfassung

Dinosaurier (Reptilia, Archosauria) am Museo de La Plata, Argentinien: kommentiertes Verzeichnis des Typenmaterials und der antarktischen Stücke

Ein kommentierter und illustrierter Katalog der nicht-Vogel-Dinosaurier am Museo de La Plata, Argentinien wird vorgestellt. Er repräsentiert den ersten kommentierten, publizierten Katalog der Dinosaurier am Museo de La Plata und beinhaltet Typenmaterial als auch antarktische Stücke. Er wurde nach Phylogenie gegliedert einschließlich systematischer Rang, Typenmaterial, weiterer Stücke, geografischer und stratigrafischer Lage und Kommentaren/Anmerkungen wenn nötig. Insgesamt beherbergt die Sammlung des Museo de La Plata dreizehn Typen von nicht-Vogel-Dinosauriern, einschließlich acht Sauropoden, ein Theropode, ein Ornithischier und drei Ichnotaxa. Es gibt vier antarktische Stücke von denen eines ein Holotyp ist und das andere mit dem ersten Dinosaurier der von diesem Kontinent registriert wurde übereinstimmt.

SCHLÜSSELWÖRTER: Saurischia; Ornithischia; Holotyp; Lectotyp; Patagonien; Antarktika

Translator: Eva Gebauer

Arabic

352 arab

Translator: Ashraf M.T. Elewa

 

 

FIGURE 1. Location map showing the distribution of the occurrence of the materials mentioned in this contribution. 1. Detail of Patagonia. 2. Detail of Antarctic Peninsula. Abbreviations: 1: Neuquensaurus australis, N. robustus, Laplatasaurus araukanicus, Microcoelus patagonicus, "Titanosaurus" nanus; 2: Amygdalodon patagonicus; 3: Genyodectes serus; 4: Argyrosaurus superbus; 5: Wildeichnus navesi, Sarmientichnus scagliai, Delatorrichnus goyenechei; 6: Antarctopelta oliveroi and MLP 11-II-20-1; 7: MLP 99-I-10-1; 8: MLP 96-I-6-2.

figure 1

FIGURE 2. Phylogenetic relationships of dinosaurs. 1. Simplified relationships of archosaurs (adapted from Benton, 2004). 2. Phylogenetic relationships of Theropoda (adapted from Holtz et al., 2004). 3. Phylogenetic relationships of Sauropodomorpha (adapted from Yates, 2003; Pol et al., 2011;Carballido et al., 2011; D'Emic, 2012). 4. Phylogenetic relationships of Ornithischia (adapted from from Butler et al., 2008). Black circles represent node-based taxon, whereas black arrows denote stem-based taxon.

figure 2

FIGURE 3. Amygdalodon patagonicus (lectotype). Posterior dorsal vertebra (MLP 46-VIII-21-1/2) in right lateral (1), anterior (2), left lateral (3), and posterior (4) views. Scale bar equals 100 mm.

figure 3

FIGURE 4. Laplatasaurus araukanicus (lectotype). Right tibia (MLP-CS 1128) in medial (1), anterior (2), lateral (3), posterior (4), and proximal (5, anterior towards top) views. Right fibula (MLP-CS 1127) in lateral (6), posterior (7), medial (8), and anterior (9) views. Scale bar equals 100 mm.

figure 4

FIGURE 5. Microcoelus patagonicus nomen dubium (holotype). Anterior dorsal vertebra (MLP-Ly 23) in left lateral (1), posterior (2), and right lateral (3) views. Scale bar equals 100 mm.

figure 5

FIGURE 6. "Titanosaurus" nanus nomen dubium (holotype). Cervical vertebra (MLP-Ly 19) in right lateral (1), posterior (2), and anterior (3) views. Dorsal vertebra (MLP-Ly 18) in left lateral (4), posterior (5), and anterior (6) views. Scale bar equals 100 mm.

figure 6

FIGURE 7. Argyrosaurus superbus, holotype (MLP 77-V-29-1). 1. Left humerus in anterior view. 2. Left ulna in anterolateral view. 3. Left radius in posterior view. 4. Left metacarpus in anterior view. Scale bar equals 100 mm.

figure 7

FIGURE 8. Antarctosaurus giganteus (holotype). Femora (MLP 26-316) exhibited on display at the MLP.

figure 8

FIGURE 9. Lithostrotia gen. et sp. ideterminate. Caudal vertebrae (MLP 11-II-20-1) in anterior (1), right lateral (2) and posterior (3) views. Scale bar equals 100 mm.

figure 9

FIGURE 10. Neuquensaurus australis (holotype). 1. Sacral vertebrae 1-5 (MLP-Ly 7). 2. Sacral vertebrae 5 and 6 (MLP-Ly 7). 3. Sacral vertebra 7, biconvex (MLP-Ly 1). 4. Second caudal vertebra (MLP-Ly 2). 5. Third caudal vertebra (MLP-Ly 3). 6. Anterior caudal vertebra (MLP-Ly 4). 7. Anterior caudal vertebra (MLP-Ly 5). 8. Middle caudal vertebra (MLP-Ly 6). All elements are in right lateral view (reversed). Scale bar equals 100 mm.

figure 10

FIGURE 11. Neuquensaurus robustus (lectotype). Left femur (MLP-CS 1480) in anterior (1) and posterior (2) views. Left radius (MLP-CS 1171) in posterior (3), lateral (4), anterior (5), and medial (6) views. Left ulna (MLP-CS 1094) in lateral (7), posterolateral (8), proximal (9, anterior towards top), and anteromedial (10) views. Right ulna (MLP-CS 1095) in lateral (11), posteromedial (12), proximal (13, anterior towards top), and anteromedial (14) views. Scale bar equals 100 mm.

figure 11

FIGURE 12. Genyodectes serus (holotype) (MLP 26-39). Premaxilae in anterior (1), posterior (2), right lateral (3) and left lateral (4) views. Right maxilla in lateral (5) and medial (6) views. Left maxilla in lateral (7) and medial (8) views. Right dentary in medial (9) and lateral (10) views. Left dentary in medial (11) and lateral (12) views. Scale bar equals 100 mm.

figure 12

FIGURE 13. Antarctopelta oliveroi, holotype (MLP 86-X-28-1). Partial. 1. Left dentary in medial view. 2. Teeth. 3. Anterior cervical vertebra in anterior view. 4. Posterior cervical vertebra in anterior view 5. Right IV? metatarsal in ventral view. Scale bar equals 10 mm in 1 and 2, and 3 mm in 3, 4 and 5.

figure 13

FIGURE 14. Hadrosauridae indet. (MLP 99-I-10-1). Tooth in occlusal (1) and side (2) views. Scale bar equals 10 mm. (adapted from Case et al., 2000).

figure 14

FIGURE 15. Hadrosauridae? (MLP 96-I-6-2). Distal end of metatarsal in dorsal (1), lateral or medial (2), ventral (3), lateral or medial (4), and distal (5) views. Scale bar equals 50 mm.

figure 15

FIGURE 16. Ichnotaxa. 1. Delatorrichnus goyenechei, holotype (MLP 60-X-31-6) (adapted from De Valais, 2011). 2. Wildeichnus navesi, paratype (MLP 60-X-31-11). Sarmientichnus scagliai, holotype (MLP 60-X-31-1A). Scale bar equals 30 mm.

figure 16

 

TABLE 1. Summary of the taxa presented in this contribution. *  denotes missing at present.

 

Systematic rank

Collection number

Horizon

Locality

Age

Type/referred material

Saurischia

         

Sauropodomorpha

         

Sauropoda

         

Amygdalodon patagonicus

MLP 46-VIII-21-1/2

Cerro Carnerero Formation

Cañadón Puelman, southwest from Cerro Carnerero, Sierra del Cerro Negro, Chubut Province, Argentina

Late Toarcian to Early Aalenian

Posterior dorsal vertebra (lectotype)

Laplatasaurus araukanicus

MLP-CS 1128, MLP-CS 1127

Anacleto Formation, Rio Colorado Subgroup

Cinco Saltos and Lago Pellegrini, Rio Negro Province, Argentina

Lower Campanian

Right tibia and right fibula (lectotype)

Microcoelus patagonicus

MLP-Ly 23

Bajo de La Carpa Formation, Río Colorado Subgroup

Right bank of the Río Neuquén, close to the city of Neuquén, Neuquén Province, Argentina

Santonian

Anterior dorsal vertebra (holotype)

"Titanosaurus" nanus

MLP-Ly 18/19

Bajo de La Carpa Formation, Río Colorado Subgroup

Right bank of the Río Neuquén, close to the city of Neuquén, Neuquén Province, Argentina

Santonian

Incomplete cervical and dorsal vertebrae (holotype)

Argyrosaurus superbus

MLP 77-V-29-1

Bajo Barreal Formation, Chubut Group

Left bank (northwest) of the Río Chico, near Pampa Pelada, northeast of Lake Colhué Huapi, Chubut Province, Argentina

Campanian–Maastrichtian

Complete left forlimb (holotype)

Antarctosaurus giganteus

MLP 26-316

Plottier Formation, Neuquén Subgroup, Neuquén Group

Aguada del Caño, Neuquén Province, Argentina

Coniacian–Santonian

Two femora, two fragments of a pubis, distal end of a tibia, two incomplete caudal vertebrae as well as indeterminate fragments (holotype)

Lithostrotia indet.

MLP 11-II-20-1

Santa Marta Formation

Santa Marta Cove, northern James Ross Island, Antarctica

Upper Campanian

Incomplete caudal vertebra

Neuquensaurus australis

MLP-Ly 1/2/3/4/5/6/7

Anacleto Formation

Neuquén Province

Lower Campanian

Sacrum and caudal vertebrae (holotype)

Neuquensaurus robustus nomen dubium

MLP-CS 1095, MLP-CS 1480, MLP-CS 1171, MLP-CS 1094

Anacleto Formation

Neuquén Province

Lower Campanian

Right ulna, left ulna, left radius, left femur (lectotype)

Theropoda

         

Genyodectes serus

MLP 26-39

Cerro Barcino Formation

Cañadón Grande, Department of Paso de Indios, Chubut Province, Argentina

Aptian-Albian

Incomplete portions of premaxillae, maxillae, dentaries, supradentaries, splenial, and tooth (holotype)

Ornithischia

         

Ankylosauria

         

Antarctopelta oliveroi

MLP 86-X-28-1

Gamma Member of the Santa Marta Formation, Marambio Group

Santa Marta Cove, North James Ross Island, Antarctica

Upper Campanian

Partial skeleton, including cranial remains (holotype)

Ornithopoda

         

Hadrosauridae indet.

MLP 99-I-10-1

Sandwich Bluff Member of the López de Bertodano Formation

Eastern flank of Sandwich Bluff, Vega island, Antarctica

Upper-lower Maastrichtian

Cheek tooth*

Hadrosauridae indet.

MLP 96-I-6-2

Unit K1B 9 of the López de Bertodano Formation

Seymour (Marambio) Island, Antarctica

Upper-lower Maastrichtian

Distal end of metatarsal

Ichnospecies

         

Theropoda

         

Wildeichnus navesi

MLP 60-X-31-5

La Matilde Formation

Laguna Manantiales ranch, Santa Cruz Province, Argentina

Middle Jurassic-lower Upper Jurassic

Cast of an isolated left pes (holotype)

Sarmientichnus scagliai

MLP 60-X-31-1A

La Matilde Formation

Laguna Manantiales ranch, Santa Cruz Province, Argentina

Middle Jurassic-lower Upper Jurassic

Impression of an isolated right foot (holotype)

Ornithischia

         

Delatorrichnus goyenechei

MLP 60-X-31-6

La Matilde Formation

Laguna Manantiales ranch, Santa Cruz Province, Argentina

Middle Jurassic-lower Upper Jurassic

Trackway with manus and pes impressions (holotype)

 

This email address is being protected from spambots. You need JavaScript enabled to view it.">Alejandro Otero
oteroDivisión Paleontología de Vertebrados
Museo de La Plata
Paseo del Bosque s/n (1900)
La Plata, Argentina

Alejandro Otero is a Vertebrate paleontologist. He works on sauropodomorph dinosaurs (sistematics and paleobiology). He also teaches geology in La Plata University.

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This email address is being protected from spambots. You need JavaScript enabled to view it.
marceloDivisión Paleontología de Vertebrados
Museo de La Plata
Paseo del Bosque s/n (1900)
La Plata, Argentina

Marcelo Reguero is a Vertebrate paleontologist. His studies focus on tertiary mammals from Patagonia and Antarctica. He is also the collection manager of La Plata Museum.