Anabar Bay, section 1A, bed 19 (Cretaceous of Russian Federation)

Where: Russian Federation (73.4° N, 113.8° E: paleocoordinates 75.7° N, 91.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ramulicosta ammonoid zone, Early/Lower Valanginian (140.2 - 136.4 Ma)

• Ramulicosta subzone

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified shale

Size class: macrofossils

Collected by Bogomolov in 1980

Primary reference: Y. I. Bogomolov. 1989. Poliptikhity (Ammonity) i biostratigrafiya boreal'nogo Valanzhina. Akademiya Nauk SSSR, Sibirskoe Otdelenie Trudy Instituta Geologii I Geofiziki 696:1-199 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 189638: authorized by Matthew Clapham, entered by Matthew Clapham on 03.11.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida -
 Pectinida - Buchiidae
 Ostreida - Pinnidae
Pinna sp. Linnaeus 1758 oyster
 Mytilida - Crenellidae
 Pholadomyida - Pholadomyidae
Homomya sp. Agassiz 1843 clam
Gastropoda
 Heterostropha - Gordenellidae
"Costacolpus cf. septentrionalis" = Turritelloidea
"Costacolpus cf. septentrionalis" = Turritelloidea snail
Cephalopoda
 Ammonitida - Polyptychitidae
"Siberites rectangulatus" = Polyptychites (Primitiviptychites) rectangulatus Bogoslowsky 1902 ammonite
"Siberites ramulicosta" = Polyptychites (Polyptychites) ramulicosta Pavlow 1892 ammonite
 Phylloceratida - Phylloceratidae
Phylloceratidae indet. Zittel 1884 ammonite