Great Falls Locality 15 (Cretaceous of the United States)

Where: Cascade County, Montana (47.5° N, 111.4° W: paleocoordinates 47.7° N, 60.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Kootenai Formation, Late/Upper Aptian (122.5 - 112.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; shale and lenticular sandstone

Size class: macrofossils

Preservation: original carbon

Collection methods: surface (in situ),

Primary reference: C. A. Lapasha and C. N. Miller. 1985. Flora of the Early Cretaceous Kootenai Formation in Montana, Bryophytes and Tracheophytes Excluding Conifers. Palaeontographica Abteilung B 196:111-145 [H. Sims/H. Lindon/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 21151: authorized by Hallie Sims, entered by Heather Lindon on 19.06.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Dictyothykalos sp.
netlike object
Sphenopteridae
  - Sphenopteridae
Sphenopteris latiloba Fontaine 1889
Fontaine
Hepaticae
 Marchantiales - Marchantiaceae
Marchantiolites blairmorensis Brown and Robison 1976 liverwort
(Berry) Brown and Robison, bryophyte w/ thallus and rhizoids
Marchantiopsida
 Metzgeriales -
Metzgeriites montanensis n. sp. Lapasha and Miller 1985
bryophyte w/ thallus and rhizoids
Jungermanniopsida
 Jungermanniales - Jungermaniidae
Diettertia montanensis Brown and Robison 1974
Brown and Robinson
Schizeaceae
  - Schizeaceae
Klukia canadensis Bell 1956
Bell
Ginkgoopsida
 Caytoniales - Caytoniaceae
Sagenopteris williamsii Bell 1956
(Newberry) Bell
Sagenopteris mclearni Berry 1929
Berry
Sagenopteris elliptica Fontaine 1889
Fontaine
unclassified
  -
Spermatophyta "Cuticle Type A"
sp. A; several small pieces of this cuticle were obtained from bulk maceration
Spermatophyta "Cuticle Type B"
sp. B; several small pieces of this cuticle were obtained from bulk maceration
 Bennettitales -
Zamites arcticus Göppert 1863
Goeppert
Pseudocycas douglasii Lapasha and Miller 1985
Polypodiopsida
 Cyatheales - Polypodiidae
Coniopteris hymenophylloides Brongniart 1828 scaly tree fern
(Brongniart) Seward
 Schizaeales - Polypodiidae
Acrostichopteris longipennis Fontaine 1889
Fontaine
  -
Cladophlebis inclinata Fontaine 1889
Fontaine
Cladophlebis constricta Fontaine 1889
Fontaine
Cladophlebis oblongifolia Fontaine 1889
Fontaine
Cladophlebis oerstedi Seward 1927
(Herr) Seward
 Equisetales - Equisetidae
"Equisetum montanensis" = Equisetum montanense
"Equisetum montanensis" = Equisetum montanense Fontaine 1898 horsetail