KJ9727 (DMNH 2087) (Cretaceous of the United States)

Also known as Acronym Boy, KJ9727, 9814

Where: Slope County, North Dakota (46.4° N, 103.9° W: paleocoordinates 52.6° N, 77.3° W)

• coordinate stated in text

• small collection-level geographic resolution

When: HCIIb zone, Hell Creek Formation, Lancian (70.6 - 66.0 Ma)

• -34.4m to Hell Creek-Fort Union contact datum, -36.885m to K-T boundary based on calculations in Johnson (2002)

• bed-level stratigraphic resolution

Environment/lithology: fine channel fill; poorly lithified sandstone

Size class: macrofossils

Preservation: adpression

Reposited in the DMNH

Collection methods: quarrying, mechanical,

• Specimens located at Denver Museum of Nature & Science

Primary reference: K. R. Johnson. 2002. Megaflora of the Hell Creek and lower Fort Union Formations in the western Dakotas: Vegetational response to climate change, the Cretaceous-Tertiary boundary event, and rapid marine transgression. The Hell Creek Formation and the Cretaceous-Tertiary boundary in the northern Great Plains: An integrated continental record of the end of the Cretaceous. 361:329-391 [S. Wing/S. Wing/K. Johnson]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 48224: authorized by Kirk Johnson, entered by Kirk Johnson on 15.03.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Equisetopsida
 Pinidae - Pinidae
Araucariaceae "HC299" Henckel and Hochstetter 1865
HC299
? Araucariaceae "HC83" Henckel and Hochstetter 1865
HC83
Carpites
  -
Carpites ulmiformis Dorf 1942
HC54
Polypodiopsida
 Equisetales - Equisetidae
Equisetum "FU36" Linnaeus 1753 horsetail
FU36
  - Polypodiaceae
? Polypodiaceae "HC241" Presl and Presl 1822
HC241
Ginkgoopsida
 Ginkgoales - Ginkgoaceae
Ginkgo adiantoides Unger 1845 ginkgo
HC114
Angiospermae
 Fagales - Nothofagaceae
Dryophyllum subfalcatum Lesquereux 1875
HC49
 Rosales - Rhamnaceae
Rhamnus cleburni Lesquereux 1872 buckthorn
HC62
 Rosales - Rosaceae
Rosaceae "HC80" Jussieu 1789 rose
HC80
 Rosales - Urticaceae
Urticaceae "HC93" de Jussieu 1789 nettle
HC93
 Rosales - Cannabaceae
Cannabaceae "HC225" Martinov 1820 hemp
HC225
 Celastrales - Celastraceae
Celastrus taurenensis bittersweet
HC94
 Vitales - Vitaceae
Vitis stantonii grapevine
HC14
  -
"Dicotyledonae "HC27"" = Dicotyledoneae, "Dicotyledonae "HC135"" = Dicotyledoneae, "Dicotyledonae "HC242"" = Dicotyledoneae, "Dicotyledonae "HC244"" = Dicotyledoneae, "Dicotyledonae "HC245"" = Dicotyledoneae, "Dicotyledonae "HC247"" = Dicotyledoneae, "Dicotyledonae "HC251"" = Dicotyledoneae, "Dicotyledonae "HC300"" = Dicotyledoneae, "Dicotyledonae "HC301"" = Dicotyledoneae, "Dicotyledonae "HC302"" = Dicotyledoneae, "Dicotyledonae "HC370"" = Dicotyledoneae, "Dicotyledonae "HC252"" = Dicotyledoneae
"Dicotyledonae "HC27"" = Dicotyledoneae
HC27
"Dicotyledonae "HC135"" = Dicotyledoneae
HC135
"Dicotyledonae "HC242"" = Dicotyledoneae
HC242
"Dicotyledonae "HC244"" = Dicotyledoneae
HC244
"Dicotyledonae "HC245"" = Dicotyledoneae
HC245
"Dicotyledonae "HC247"" = Dicotyledoneae
HC247
"Dicotyledonae "HC251"" = Dicotyledoneae
HC251
"Dicotyledonae "HC300"" = Dicotyledoneae
HC300
"Dicotyledonae "HC301"" = Dicotyledoneae
HC301
"Dicotyledonae "HC302"" = Dicotyledoneae
HC302
"Dicotyledonae "HC370"" = Dicotyledoneae
HC370
"Dicotyledonae "HC252"" = Dicotyledoneae
HC252
Dicotyledoneae
 Rosidae - Rosidae
? Rosidae "HC90" Takhtajan 1967
HC90
Rosidae "HC246" Takhtajan 1967
HC246
Rosidae "HC288" Takhtajan 1967
HC288
Angiospermae
 Saxifragales - Cercidiphyllaceae
aff. Cercidiphyllum "HC124" Siebold and Zuccarini 1846 katsura
HC124
Cercidiphyllum genetrix Newberry 1868 katsura
Hickey; FU5
 Ranunculales - Ranunculaceae
Ranunculaceae "HC226" Jussieu 1789 buttercup
HC226
 Ranunculales - Menispermaceae
Cocculus flabella Wolfe 1966
FU43
 Laurales -
Laurales "HC84" Jussieu 1820
HC84
 Laurales - Lauraceae
Cinnamomum lineafolia cinnamon
HC92