MNA Loc. 989: BM 8 (Cretaceous of the United States)

Where: Navajo County, Arizona (36.2° N, 109.9° W: paleocoordinates 37.3° N, 73.0° W)

• coordinate stated in text

When: lower shale Member (Mancos Shale Formation), Late/Upper Cenomanian (99.6 - 93.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: basinal (siliceous); lithified shale and lithified, concretionary carbonate

Size classes: macrofossils, microfossils

Preservation: mold/impression, replaced with calcite

Reposited in the NMMNH

Collection methods: bulk, quarrying,

Primary reference: J. I. Kirkland. 1996. Paleontology of the Greenhorn cylcothem (Cretaceous: late Cenomanian to middle Turonian) at Black Mesa, northeastern Arizona. New Mexico Museum of Natural History and Science Bulletin 9:1-131 [P. Harries/P. Harries/P. Harries]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 54154: authorized by Peter Harries, entered by Peter Harries on 25.09.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Polychaeta
 Serpulimorpha -
Bivalvia
 Myalinida - Inoceramidae
Inoceramus pictus Sowerby 1829 clam
 Pectinida - Pectinoidae
Camptonectes "B" Meek 1864 scallop
 Pectinida - Plicatulidae
Plicatula ferryi Coquand 1862 scallop
 Ostreida - Gryphaeidae
Gryphaeostrea elderi n. sp. oyster
 Ostreida - Ostreidae
 Ostreida - Bakevelliidae
 Pholadida - Corbulidae
 Cardiida - Arcticidae
 Poromyida - Poromyidae
Gastropoda
 Neogastropoda - Fasciolariidae
 Vanikoroidea - Eulimidae
 Naticoidea - Naticidae
Euspira stantoni n. sp. moon snail
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Cephalopoda
 Ammonitida - Acanthoceratidae
Pseudocalycoceras angolaense Spath 1931 ammonite
 Ammonitida - Scaphitidae
"Worthoceras vermiculus" = Worthoceras vermiculum
"Worthoceras vermiculus" = Worthoceras vermiculum Shumard 1860 ammonite
Echinoidea
 Spatangoida - Hemiasteridae
"Hemiaster cf. jacksoni" = Mecaster batnensis
"Hemiaster cf. jacksoni" = Mecaster batnensis Coquand 1862 heart urchin