Station 3; 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: Maíz Gordo Formation, Paleocene (66.0 - 56.0 Ma)

• Formation also called 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.Geo. L. Harrington & Cockerell in 1923 & 1923

Primary reference: T. D. A. Cockerell. 1925. Tertiary Insects from Argentina. Proceedings of the United States National Museum 68(1):1-6 [M. Clapham/J. Karr/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 110536: authorized by Matthew Clapham, entered by Jered Karr on 10.06.2011, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

 Hemiptera - Flatidae
"Ormenis devinctus n. sp." = Ormenis devincta2
"Ormenis devinctus n. sp." = Ormenis devincta2 Cockerell 1926 planthopper
BMNH unnumbered
 Hemiptera - Coreidae
? Corizus deflagratus2 Cockerell 1926 leaf-footed bug
BMNH unnumbered
 Coleoptera - Cryptophagidae
Cryptophagus sunchalensis n. sp.1 Cockerell 1926 silken fungus beetle
BMNH (on same piece as Corixus deflagratus and Ormenis devinctus)
 Coleoptera - Tenebrionidae
Tenebrionites inclinans Cockerell 1925 darkling beetle
USNM 70816
 Coleoptera - Cerambycidae
? Haruspex defectus2 Cockerell 1926 longhorned beetle
BMNH unnumbered
 Coleoptera - Curculionidae
Otiorhynchites aterrimus Cockerell 1925 snout beetle
USNM 70810
Otiorhynchites crassus n. sp.3 Cockerell and Wagner 1936 snout beetle
AMNH 24513
? Anthonomus sunchalensis Cockerell 1925 snout beetle
USNM 70812
? Cossonus devoratus Cockerell 1925 snout beetle
USNM 70811
Curculionites harringtoni Cockerell 1925 snout beetle
USNM 70813
Curculionites jujuyensis Cockerell 1925 snout beetle
USNM 70814
Curculionites sunchalicus n. sp.3 Cockerell and Wagner 1936 snout beetle
AMNH 24515
Curculionites wielandi Cockerell 1925 snout beetle
USNM 70815
 Trichoptera - Molannidae
? Molanna derosa Cockerell 1925 caddisfly
USNM 70809