Perfil Quebrada Don Nielsen (QDN-5) (Cretaceous to of Argentina)

Where: Santa Cruz, Argentina (49.5° S, 71.5° W: paleocoordinates 55.3° S, 44.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Piedra Clavada Formation, Early/Lower Albian to Early/Lower Albian (112.0 - 99.6 Ma)

Environment/lithology: deltaic; lithified, black, muddy shale and lithified, yellow, sandy sandstone

• In general, it is very clear that the trace fossils and invertebrates are essentially marine, which suggests, together with its sedimentary facies, a deltaic zone submerged in prodelta facies, deltaic front, interdistributary bays and interdistributary channels, and shoreface-beach facies.
• The Piedra Clavada Formation is composed by yellow sandstones, gray to dark mudstones, heterolithic facies and few conglomerates and coquinas.

Size class: microfossils

• Ostracoda valves and carapaces

Collected in 1996-1997; reposited in the MACN

Collection methods: bulk, chemical, hydrochloric, hydroflouric,

Primary reference: S. Ballent, A. P. Carignano, A. Iglesias and D. G. Poiré. 2011. Microfósiles calcáreos no marinos y semillas de la Formación Piedra Clavada (Albiano) en su área tipo, provincia de Santa Cruz, Argentina. Ameghiniana 48(4):541-555 [P. Wilf/E. Stiles/F. Aspromonte]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 232098: authorized by Evangelos Vlachos, entered by Franco Aspromonte on 20.10.2023

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Ostracoda
 Podocopida - Limnocytheridae
Theriosynoecum herreriensis
Theriosynoecum herreriensis Musacchio and Chebli 1975 ostracod
Carapaces
 Podocopida - Darwinulidae
Alicenula sp.
Alicenula sp. Rosetti and Martens 1998 ostracod
One carapace, valves and fragments (MLP-Mi 1820)
 Podocopida - Ilyocyprididae
Neuquenocypris antiqua
Neuquenocypris antiqua Musacchio and Simeoni 1991 ostracod
Carapaces
 Podocopida - Cyprididae
Petrobrasia sp.
Petrobrasia sp. Krömmelbein 1965 ostracod
One left valve (MLP-Mi 1819)