Locality B45, 15 km northeast of Amdo, Banggong Suture zone (Jurassic of China)

Where: Xizang, China (32.4° N, 91.8° E: paleocoordinates 15.4° N, 87.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Zhamunaqu Formation, Bajocian (170.3 - 168.3 Ma)

• Middle Jurassic (Bajocian; sauzei Zone in part)

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (); lithified, black shale

• interpreted as offshore shelf basinal facies
• black shale with thin bands of calcareous nodules

Size class: macrofossils

Collection methods: Paleontological collections made on the 1985 Geotraverse.

Primary reference: A. B. Smith and J. Xu. 1988. Palaeontology of the 1985 Geotraverse, Lhasa to Golmud. Philosophical Transactions of the Royal Society of London A 327:53-105 [M. Aberhan/S. Nurnberg/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 61426: authorized by Martin Aberhan, entered by Sabine Nürnberg on 10.06.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Sonniniidae
Fontannesia cf. luculenta, Dorsetensia sp., Euhoploceras adicra
Fontannesia cf. luculenta ammonite
could be the Upper Toarcian Dumortieria
Dorsetensia sp. ammonite
2 small fragments
Euhoploceras adicra Waagen 1867 ammonite
 Phylloceratida - Phylloceratidae
Phylloceras sp.
Phylloceras sp. Suess 1865 ammonite
Bivalvia
 Nuculanida - Nuculanidae
? Mesosaccella sp.
? Mesosaccella sp. Chavan 1946 pointed nut clam
[entered as Mesosacella sp.]
 Nuculida - Nuculidae
? Palaeonucula sp.
? Palaeonucula sp. Quenstedt 1930 nut clam
 Pectinida -
"Pectinacea indet." = Pectinoidea
"Pectinacea indet." = Pectinoidea Rafinesque 1815 scallop
Chlamys-like pectinacean
 Pectinida - Propeamussiidae
Propeamussium sp.
Propeamussium sp. de Gregorio 1884 mud scallop
 Ostreida - Bakevelliidae
? Gervillella sp.
? Gervillella sp. Waagen 1907 oyster
fragment
 Ostreida - Ostreidae
Ostreidae indet.
Ostreidae indet. Rafinesque 1815 oyster
small Gryphaea-like oyster
 Cardiida - Arcticidae
? Isocyprina sp.
? Isocyprina sp. Röder 1882 clam
 Pholadida - Corbulidae
Corbulidae indet.
Corbulidae indet. Lamarck 1818 clam
Corbulidae fragment resembling Corbulamima sp.
 Pholadida - Ceratomyidae
Ceratomya cf. bajociana
 Carditida - Astartidae
? Nicaniella sp.
? Nicaniella sp. Chavan 1945 clam
Astartidae sp. A: possibly Nicaniella sp.
Malacostraca
 Decapoda - Homolodromiidae
"Protocarcinus ? hebes" = Homolus
"Protocarcinus ? hebes" = Homolus crab
crustacea, carapace