UCMP V95030 Signal Butte ( of the United States)

Where: Modoc County, California (41.5° N, 120.6° W: paleocoordinates 41.6° N, 120.0° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Alturas Formation, Blancan (4.9 - 1.8 Ma)

• Upper Alturas Formation, below 4.8 Ma tuff

Environment/lithology: terrestrial; siltstone

• diatomaceous siltstones

Size classes: macrofossils, mesofossils, microfossils

Reposited in the UCMP

Primary reference: H. M. Wagner, C. B. Hanson, E. P. Gustafson, K. W. Gobalet, and D. P. Whistler. 1997. Biogeography of the Pliocene and Pleistocene vertebrate faunas of Northeastern California and their temporal significance to the development of the Modoc Plateau and Klamath Mountain Region. San Bernardino County Museum Association Quarterly 44(1):13-21 [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 234637: authorized by Patricia Holroyd, entered by Patricia Holroyd on 26.04.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Fontelicella melina, Anomoeonemis costata, Hantzshia cf. amphioxis, Pinnularia sp., Syndredra cf. indica, Brebissonia sp., Navicula sp., Pinnularia viridis
Mammalia
 Proboscidea - Gomphotheriidae
Gomphotheriidae indet.
Gomphotheriidae indet. Hay 1922 gomphothere
 Theriamorpha - Mammutidae
Cryptotis sp.
Cryptotis sp. Pomel 1848 small-eared shrew
 Perissodactyla - Equidae
Plesippus sp.
Plesippus sp. Matthew 1924 horse
 Lagomorpha - Leporidae
Hypolagus sp.
Hypolagus sp. Dice 1917 rabbit
 Rodentia - Cricetidae
Peromyscus sp., "Mimomys sawrockensis" = Ogmodontomys sawrockensis
Peromyscus sp. Gloger 1841 deer mouse
"Mimomys sawrockensis" = Ogmodontomys sawrockensis Hibbard 1957 mouse
Aves
 Anseriformes - Anatidae
Anas sp.
Anas sp. Linnaeus 1758 dabbling duck
Reptilia
 Squamata - Iguanidae
Sceloporus sp.
Sceloporus sp. Wiegmann 1828 spiny lizard
Amphibia
 Salientia - Ranidae
Rana sp.
Rana sp. Linnaeus 1758 frog
Actinopteri
 Cypriniformes - Cyprinidae
Ptychocheilus cf. arciferus, Gila cf. coerulea, Acrocheilus sp.
Ptychocheilus cf. arciferus Cope 1870 carp-like fish
Gila cf. coerulea Girard 1856 carp-like fish
Acrocheilus sp. Agassiz 1855 carp-like fish
cf. A. latus-A. xestes
 Cypriniformes - Catostomidae
Catostomus sp., Chasmistes sp.
Catostomus sp. carp-like fish
Chasmistes sp. Jordan 1878 carp-like fish
 Salmoniformes - Salmonidae
Oncorhynchus sp.
Oncorhynchus sp. Suckley 1860 Pacific salmon
Gastropoda
 Heterostropha - Planorbidae
Gyraulus parvus
Ostracoda
  -
Cyprinotus glaucus
 Podocopida - Candonidae
Candona acutula
 Podocopida - Limnocytheridae
Limnocythere itasca
 Podocopida - Cytherideidae
Cyprideis salebrosa
Mediophyceae
 Stephanodiscales - Thalassiosirophycidae
Stephanodiscus robustus, Stephanodiscus excentricus, Cyclotella cf. kuetzingiana, Cyclotella striata
Bacillariophyceae
 Surirellales - Surirellaceae
Surirella cf. utahensis, Campylodiscus sp.
Campylodiscus sp. Kützing 1844 diatom
 Tabellariales - Tabellariaceae
Tetracyclus lacustris
 Cymbellales - Cymbellaceae
Cymbella mexicana, Cymbella prostrata
 Cymbellales - Gomphonemataceae
Gomphonema affine
 Bacillariales - Bacillariaceae
Fragilariopsis sp., Nitzschia sp.
Fragilariopsis sp. Schmidt 1874 diatom
Nitzschia sp. Hassall 1845 diatom
 Mastogloiales - Mastogloiaceae
? Mastogloia sp.
? Mastogloia sp. Smith 1856 diatom
 Melosirales - Melosiraceae
Melosira granulata
 Rhopalodiales - Rhopalodiaceae
Epithemia trugida, Epithemia argus, Rhopalodia gibba, Rhopalodia sp.
Epithemia argus Kützing 1844 diatom
Rhopalodia sp. Müller 1895 diatom
 Fragilariales - Fragilariaceae
Opephora sp.
Opephora sp. Petit 1888 diatom
 Achnanthales - Cocconeidaceae
Cocconeis placentula