Haystack Member: Early/Lower Hemingfordian, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Daphaenodon sp.
may include amphicyonid of Fingerut et al. 1993
Oxydactylus cameloides (Wortman 1898)
    = informal Possible protolabine cameloides
Alroy 2002
genus allocation unknown, see Honey et al. 1998; includes "Paratylopus wortmani"
Mammalia - Rodentia - Heteromyidae
Schizodontomys greeni Rensberger 1973
Mammalia - Rodentia - Allomyidae
Rudiomys mcgrewi Rensberger 1983
"prob. Haystack"
Mammalia - Rodentia - Entoptychidae
Entoptychus rostratus Sinclair 1905
    = Entoptychus planifrons Cope 1878
Alroy 2002
Entoptychus individens Rensberger 1971
Mammalia - Rodentia - Mylagaulidae
Mylagaulodon sp. Sinclair 1903
could be Mesogaulus sensu Korth 1992a
Mammalia - Lagomorpha - Leporidae
Archaeolagus cf. macrocephalus (Matthew 1907)
Mammalia - Merycoidodontidae
Hypsiops breviceps (Douglass 1907)
synonym of Hypsiops brachymelis
Merycochoerus matthewi Loomis 1924
Pseudodesmatochoerus longiceps (Douglass 1907)
recombined as Merycoides longiceps
Merychyus arenarum Cope 1884
Mammalia - Camelidae
Camelidae indet. Gray 1821
Mammalia - Entelodontidae
Archaeotherium caninus (Troxell 1920)
Foss and Fremd 1998
UCMP 415: specimen number appears in appendix. Taxonomic assignment from UCMP catalog website
Mammalia - Perissodactyla - Tapiridae
Protapirus robustus Sinclair 1901
recombined as Nexuotapirus robustus
Mammalia - Carnivora - Canidae
Mesocyon socialis
Mammalia - Carnivora - Amphicyonidae
Paradaphoenus sp. Wortman and Matthew 1899
presumably includes type of "Daphoenus minimus" from the "Scenic Member" (Hough 1948)
see common names

Geography
Country:United States State/province:Oregon County:Wheeler
Coordinates: 44.9° North, 120.2° West (view map)
Paleocoordinates:44.7° North, 114.2° West
Basis of coordinate:based on political unit
Time
Period:Neogene Epoch:Miocene
Stage:Burdigalian 10 m.y. bin:Cenozoic 5
*Period:Tertiary
Key time interval:Early/Lower Hemingfordian
Age range of interval:18.50000 - 16.30000 m.y. ago
Age estimate:maximum 22.6 Ma (Ar/Ar)
* legacy (obsolete) database fields
Stratigraphy
Formation:John Day
Local section:JohnD Local bed:11
Local order:bottom to top
Stratigraphic resolution:member
Stratigraphy comments: overlies "? ATR Tuff" dated at 22.6 Ma (AA)
said to be 20 Ma or younger based on biochronology, i.e., early Hemingfordian
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Metadata
Database number:17925
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Modifier:B. Allen Research group:vertebrate
Collections that are a subset of this one:36761, 36762, 36763, 36764, 36765, 36766, 36852, 36853, 36854, 36855, 36856, 170306, 170307, 180567
Created:1994-04-30 00:00:00 Last modified:2023-07-29 10:51:23
Access level:the public Released:1994-04-30 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
1547. T. Fremd. 1994. John Day Basin paleontology field trip guide and road log: Society of Vertebrate Paleontology. John Day Fossil Beds National Monument 94-1 [J. Alroy/J. Alroy/M. Uhen]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
1505 S. E. Foss and T. Fremd. 1998. A Survey Of The Species Of Entelodonts (Mammalia, Artiodactyla) Of The John Day Basin, Oregon. Dakoterra 5:63-72 [J. Alroy/J. Alroy/J. Marcot]