Station 2; Sunchal (Paleocene of Argentina)

Where: Jujuy, Argentina (23.5° S, 65.0° W: paleocoordinates 26.3° S, 52.9° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Margas Verdes Formation, Paleocene (66.0 - 56.0 Ma)

• Formation also called Maiz Gordo & Sunchal

• bed-level stratigraphic resolution

Environment/lithology: lacustrine - small; lithified, green, muddy mudstone and calcareous limestone

• The Maíz Gordo Formation, related to the last main flooding event of the basin, shows typical lacustrine limestone values, possibly with low organic productivity. The lake which formed the Maiz Gordo formation must have been very shallow because it has alternating lacustrine and partially exposed mudflat deposits.
• Green rock, easily breaking into small angular fragments. In its upper part it shows streaks of red, increasing until we reach an entirely red deposit. Horizon with insects was typial green formation interbedded with limestone.

Size class: macrofossils

Preservation: mold/impression

Collected by T.D.A. Cockerell & Wife in 1923

Primary reference: T. D. A. Cockerell. 1925. Tertiary Fossil Insects from Argentina. Nature 116(2924):711-712 [M. Clapham/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 110425: authorized by Matthew Clapham, entered by Jered Karr on 07.06.2011, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Hemiptera -
Hypocixius oblitescens n. gen. n. sp.2
Hypocixius oblitescens n. gen. n. sp.2 Cockerell 1926 true bug
 Orthoptera - Gryllidae
Gryllidae "indet. 5"4, Gryllus vociferans n. sp.
Gryllidae "indet. 5"4 Laicharting 1781 true crickets
BMNH In. 35836 (from same locality as G. vociferans)
Gryllus vociferans n. sp. Cockerell 1925 field cricket
Part of male Tegmen
 Dermaptera - Anisolabididae
"Psalis pachyura n. sp." = Carcinophora pachyura
"Psalis pachyura n. sp." = Carcinophora pachyura Cockerell 1925 earwig
Forceps
 Coleoptera - Chrysomelidae
Chrysomelites danielis n. sp.1
Chrysomelites danielis n. sp.1 Cockerell 1926 leaf beetle
BMNH ("Station 2, marked B")
 Coleoptera - Cerambycidae
Cerambycites wilmattae n. sp.
Cerambycites wilmattae n. sp. Cockerell 1925 longhorned beetle
Found by Wife
 Coleoptera - Curculionidae
Curculionites megastictus n. sp.3, Curculionites epistictus n. sp.3, Curculionites latiusculus n. sp.3, Curculionites eustictus n. sp.3, Curculionites microstictus n. sp.3, Curculionites angustior n. sp.3
Curculionites megastictus n. sp.3 Cockerell and Wagner 1936 snout beetle
AMNH 24511
Curculionites epistictus n. sp.3 Cockerell and Wagner 1936 snout beetle
AMNH 24510
Curculionites latiusculus n. sp.3 Cockerell and Wagner 1936 snout beetle
AMNH 24507
Curculionites eustictus n. sp.3 Cockerell and Wagner 1936 snout beetle
AMNH 24508
Curculionites microstictus n. sp.3 Cockerell and Wagner 1936 snout beetle
AMNH 24509
Curculionites angustior n. sp.3 Cockerell and Wagner 1936 snout beetle
AMNH 24512
 Coleoptera - Elateridae
Elaterites microstictus n. sp.1, Elaterites bruchi n. sp.1
Elaterites microstictus n. sp.1 Cockerell 1926 click beetle
BMNH ("Station 2, marked E")
Elaterites bruchi n. sp.1 Cockerell 1926 click beetle
BMNH ("Station 2, marked A")
 Coleoptera - Carabidae
Carabites schueli n. sp.1
Carabites schueli n. sp.1 Cockerell 1926 ground beetle
BMNH ("Station 2, marked C")
1Cockerell 1926; 2Cockerell 1926; 3Cockerell 1936; 4Zeuner 1939