Monte Leon, Paleosurface II (Miocene of Argentina)

Where: Argentina (50.3° S, 68.9° W: paleocoordinates 51.1° S, 62.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Monte Leon Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: offshore; poorly lithified, volcaniclastic, silty sandstone

Size class: macrofossils

Collection methods: surface (in situ), mechanical,

• Repository: GHUNLPam, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Santa Rosa, La Pampa, Argentina.

Primary reference: R. S. Crawford, S. Casadio, R. M. Feldmann, M. Griffin, A. Parras and C. E. Schweitzer. 2008. Mass mortality of fossil decapods within the Monte Leon Formation (early Miocene), southern Argentina: victims of Andean Volcanism?. Annals of Carnegie Museum 77(2):259-287 [C. Schweitzer/C. Schweitzer]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 185968: authorized by Matthew Clapham, entered by Matthew Clapham on 31.05.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Malacostraca
 Decapoda - Geryonidae
Chaceon peruvianus d'Orbigny 1842 crab
Bivalvia
 Arcida - Cucullaeidae
Cucullaea alta Sowerby 1846 clam
 Pectinida - Pectinoidae
Zygochlamys sp. Ihering 1907 scallop
 Ostreida - Ostreidae
? Crassostrea hatcheri Ihering 1899 oyster
 Carditida - Carditidae
Pleuromeris sp. Conrad 1867 clam
 Cardiida - Mactridae
Mactra patagonica d'Orbigny 1846 clam
 Cardiida - Veneridae
 Cardiida - Tellinidae
Tellinidae indet. Blainville 1814 tellin clam
 Cardiida - Cardiidae
Cardium sp. Linnaeus 1758 cockle
 Hiatellida - Hiatellidae
Gastropoda
 Triphoroidea - Cerithiopsidae
 Neogastropoda - Cancellariidae
 Neogastropoda - Volutidae
"Proscaphella gracilior" = Miomelon gracilis
"Proscaphella gracilior" = Miomelon gracilis Philippi 1887 volute
 Neogastropoda - Volutomitridae
Neoimbricaria patagonica Ihering 1897 snail
 Neogastropoda - Raphitomidae
 Neogastropoda - Terebridae
 Naticoidea - Naticidae
Natica sp. Scopoli 1777 moon snail
 Calyptraeoidea - Calyptraeidae
Calyptraea sp. Lamarck 1799 slipper shell
 Sorbeoconcha - Turritellidae
 Trochoidea - Trochidae
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Echinoidea
  -
Echinoidea indet. Leske 1778 sea urchin