Bed 92 (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, black limestone

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 192419: authorized by Alexis Rojas, entered by Alexis Rojas on 02.04.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Olcostephanidae
"Spiticeras (Kilianiceras) cf. chomeracense" = Kilianiceras
"Spiticeras (Kilianiceras) cf. chomeracense" = Kilianiceras ammonite
 Ammonitida - Himalayitidae
Parodontoceras cf. beneckei, Protacanthodiscus cf. andreaei
Protacanthodiscus cf. andreaei Kilian 1889 ammonite
 Ammonitida - Neocomitidae
Berriasella sp., Substeueroceras sp., Substeueroceras ? striolatum, Substeueroceras cf. ellipsostomum, Substeueroceras cf. lamellicostatum, Substeueroceras koeneni
Berriasella sp. Uhlig 1905 ammonite
Substeueroceras sp. Spath 1922 ammonite
Substeueroceras cf. ellipsostomum Steuer 1897 ammonite
Substeueroceras cf. lamellicostatum Burckhardt 1912 ammonite
Substeueroceras koeneni Steuer 1897 ammonite
 Ammonitida - Sphaeroceratidae
Grayiceras sp.
 Ammonitida - Haploceratidae
Haploceras sp., Haploceras spp.
Haploceras sp. Zittel 1870 ammonite
Haploceras spp. Zittel 1870 ammonite