Bed 100 (Jurassic of Iraq)

Where: Zakho, Iraq (37.0° N, 43.4° E: paleocoordinates 9.4° N, 37.9° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Durangites ammonoid zone, Chia Gara Formation, Late/Upper Tithonian (150.8 - 145.0 Ma)

• Total thickness 232.4 meters

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, brown limestone and lithified marl

Size class: macrofossils

Preservation: cast

Collection methods: quarrying,

Primary reference: M. K. Howarth. 1992. Tithonian and Berriasian ammonites from the Chia Gara Formation in northern Iran. Palaeontology 35(3):597-655 [A. Rojas/A. Rojas/A. Rojas]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 192418: authorized by Alexis Rojas, entered by Alexis Rojas on 02.04.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Himalayitidae
Parodontoceras spp., "Parodontoceras aff. callistoides" = Parodontoceras calistoides
"Parodontoceras aff. callistoides" = Parodontoceras calistoides Behrendsen 1891 ammonite
 Ammonitida - Neocomitidae
Kossmatia sp. Uhlig 1907 ammonite
Berriasella aff. privasensis Pictet 1867 ammonite
"Protacanthodiscus cf. perornatus" = Renngarteniceras perornatum Retowski 1893 ammonite
Blanfordiceras ? sp. Cossman 1907 ammonite
 Ammonitida - Ancyloceratidae
Ancyloceras sp. d'Orbigny 1842 ammonite
 Ammonitida - Protancyloceratidae
Leptoceras spp. Uhlig 1883 ammonite
Protancyloceras hondense Imlay 1942 ammonoid
Protancyloceras spp.