Sumbar River, 22-24 cm above K/Pg boundary (Paleocene of Turkmenistan)

Where: Turkmenistan (38.5° N, 56.2° E: paleocoordinates 33.5° N, 50.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Danian (66.0 - 61.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lithified, gray marl

Size class: macrofossils

Preservation: mold/impression

Collected by A.S. Alekseev in 1983, 1985

• Repository: NHMM, Natuurhistorisch Museum Maastricht,Maastricht, the Netherlands

Primary reference: M. Machalski, J. W. M. Jagt, A. S. Alekseev and E. A. Jagt-Yazykova. 2012. Terminal Maastrichtian ammonites from Turkmenistan, central Asia. Acta Palaeontologica Polonica 57:729-735 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 183340: authorized by Matthew Clapham, entered by Matthew Clapham on 11.12.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

• Whether or not the single scaphitid mould recovered above the K–Pg boundary clay represents a Danian survivor or simply represents a remanié specimen, cannot be determined at this time.
Cephalopoda
 Ammonitida - Scaphitidae
Scaphitidae indet. Gill 1871 ammonite
probably Hoploscaphites constrictus johnjagti (Pachydiscidae in Alekseev et al., 1988)