La Chumbiada: Late Pleistocene, Argentina

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Insecta - Coleoptera - Dytiscidae
Ramírez and Michat 2016 1 specimen
MHM-PI 35
Insecta - Coleoptera - Scarabaeidae
Diloboderus abderus (Sturm 1826)
1 specimen
MHM-PI 25
1 specimen
MHM-PI 24
see common names

Geography
Country:Argentina State/province:Buenos Aires
Coordinates: 35.7° South, 58.8° West (view map)
Paleocoordinates:
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Quaternary Epoch: Pleistocene
Stage: Late Pleistocene 10 m.y. bin: Cenozoic 6
Key time interval: Late Pleistocene
Age range of interval: 0.129 - 0.0117 m.y. ago
Stratigraphy
Formation:Luján Member:Guerrero
Stratigraphic resolution:bed
Stratigraphy comments: The age of the sediments containing fossil insects ranges between 12,100 ± 100 14C BP and 13,400 ± 200 14C BP and was obtained by radiocarbon analysis of bone collagen and molluscan shells.
Lithology and environment
Primary lithology:brown,green unlithified sandy claystone
Lithology description: Greenish brown sandy clays, exhibiting abundant organic matter, gypsum, and carbonate concretions
Environment:pond Tectonic setting:non-subsiding area
Geology comments: Small paleopond environment that was filled by fluvial sediments
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Repository: Museo Histórico Municipal "Alfredo Enrique Mulgura" of General Belgrano City (MHM)
Metadata
Database number:184124
Authorizer:M. Clapham Enterer:M. Clapham
Research group:paleoentomology
Created:2017-02-02 20:49:26 Last modified:2025-02-22 15:12:02
Access level:the public Released:2017-02-02 20:49:26
Creative Commons license:CC0
Reference information

Primary reference:
61520. L. C. Ramírez and C. P. Alonso. 2016. Two late Pleistocene members of the white-grub complex, one of the most destructive insect pests of turfgrasses. Revista Brasileira de Paleontologia 19:531-536 [M. Clapham/M. Clapham]

Secondary references:

64588 L. C. Ramírez and M. C. Michat. 2016. First fossil predaceous diving beetle from the Late Pleistocene of Buenos Aires, Argentina. Ameghiniana 53:512-516 [M. Clapham/M. Clapham]