Holly's Microsite
Basic information
Sample name: Holly's Microsite
Sample aka: SC-188
Reference: K. D. Rose. 1981. The Clarkforkian land-mammal age and mammalian faunal composition across the Paleocene-Eocene boundary. University of Michigan Papers on Paleontology 26:1-197 [ER 4102]
Geography
Country: United States
State: Wyoming
County: Park
Coordinate: 44.85° N, -109.1° W
Latlng basis: stated in text
Formation: Willwood
Time interval: Late Palaeocene
Zone: Clarkforkian
Section: Polecat Bench
Unit number: 7
Max Ma: 57.101
Min Ma: 56.0
Age basis: other
Geography comments: "SE 1/4, S 1, T 56 N, R 102 W, and SW 1/4, S 6, T 56 N, R 101 W (Sec. 4)"
assigned to the Plesiadapis cookei zone of the Clarkforkian, meaning the Clarkforkian part of the lower Willwood Formation, which is entirely in chron 24r (see for example Gingerich 2001)
the meter level is said to be 1280 m by Gunnell and Gingerich (1991) and appears to be 1260 m in Fig. 3 of Krause (1986)
the age assignments are the base of chron 24r according to Ogg (2020) and the Palaeocene-Eocene boundary according to the ICS 2003 time scale
assigned to the Plesiadapis cookei zone of the Clarkforkian, meaning the Clarkforkian part of the lower Willwood Formation, which is entirely in chron 24r (see for example Gingerich 2001)
the meter level is said to be 1280 m by Gunnell and Gingerich (1991) and appears to be 1260 m in Fig. 3 of Krause (1986)
the age assignments are the base of chron 24r according to Ogg (2020) and the Palaeocene-Eocene boundary according to the ICS 2003 time scale
Environment
Lithology: mudstone
Habitat comments: "Gray mudstone at the base of this locality contains a pocket that, through quarrying and screen-washing, has yielded the richest Clarkforkian collection from a single site in the Clark's Fork Basin" but several "larger specimens" have "been excavated from drab mudstones slightly above the level of the quarry"
Methods
Life forms: carnivores, primates, rodents, ungulates, other large mammals, other small mammals
Sampling methods: quarry, screenwash
Sample size: 472 specimens
Years: 1977
Museum: UMMP
Net or trap nights: 0
kg screened: 907
Basal area status: not applicable
Sampling comments: "discovered in 1977 by B. Holly Smith"
"we found surface concentrations of small vertebrates, screenwashing was performed" and was "highly successful" and the site was quarried "extensively": "About 30 sacks (approximately one ton) of matrix have been washed"
Secord (2008) reports a much larger sample from this site with different counts and more species that I have integrated into Rose's version
"Phenacodus, Coryphodon, and Dipsalidictis (Oxyaena) aequidens appeared in a faunal list for Hollys Microsite published by Krause (1986) but are excluded here because they appear to have been surface collected from the surrounding area (SC-188), based on museum records"
the omitted Phenacodus primaevus of Rose is the same as Phenacodus intermedius of Thewissen (2008)
one specimen of Dissacus sp. is also omitted by Secord (2008), and I am unable to match this identification to his list
see also Krause (1986)
"we found surface concentrations of small vertebrates, screenwashing was performed" and was "highly successful" and the site was quarried "extensively": "About 30 sacks (approximately one ton) of matrix have been washed"
Secord (2008) reports a much larger sample from this site with different counts and more species that I have integrated into Rose's version
"Phenacodus, Coryphodon, and Dipsalidictis (Oxyaena) aequidens appeared in a faunal list for Hollys Microsite published by Krause (1986) but are excluded here because they appear to have been surface collected from the surrounding area (SC-188), based on museum records"
the omitted Phenacodus primaevus of Rose is the same as Phenacodus intermedius of Thewissen (2008)
one specimen of Dissacus sp. is also omitted by Secord (2008), and I am unable to match this identification to his list
see also Krause (1986)
Metadata
Sample no: 4531
Contributor no: John Alroy
Enterer: John Alroy
Modifier no: John Alroy
Created: 2024-12-01 04:27:32
Modified: 2024-12-06 22:52:31
Abundance distribution
Each square represents a species. Square sizes are proportional to counts. Values are logged.
Statistics
37 species
8 singletons
total count 472
geometric series index: 58.2
Fisher's α: 9.401
geometric series k: 0.882
Hurlbert's PIE: 0.9044
Shannon's H: 2.8251
Good's u: 0.9831
Register
| †Microcosmodon rosei | 16 | |
| type | ||
| †Ectypodus powelli | 92 | |
| †Peradectes protinnominatus | 21 | |
| Krishtalka and Stucky (1983): "Peradectes cf. chesteri" | ||
| †Prodiacodon cf. tauricinerei | 3 | |
| †Palaeoryctes punctatus | 2 | |
| Secord (2008) | ||
| †Labidolemur kayi | 8 | |
| Krause (1986): :"Apatemys sp." | ||
| †Leptacodon rosei | 27 | |
| Gingerich (1987): "Leptacodon cf. packi" | ||
| †Plagioctenodon cf. krausae | 8 | |
| †Leipsanolestes cf. siegfriedti | 5 | |
| Secord (2008): "Leipsanolestes siegfriedti" | ||
| Diacodon minutus = †Adunator cf. minutus | 18 | |
| †Worlandia inusitata | 87 | |
| type | ||
| †Niptomomys doreenae | 3 | |
| †Tinimomys graybulliensis | 2 | |
| †Plesiadapis cookei | 17 | |
| †Niptomomys doreenae | 2 | |
| †Tinimomys graybulliensis | 3 | |
| †Carpolestes simpsoni | 31 | |
| Bloch and Gingerich (1998): "Carpolestes nigridens" | ||
| †Phenacolemur cf. praecox | 17 | |
| Secord (2008): "Phenacolemur pagei" | ||
| †Phenacolemur cf. simonsi | 1 | |
| Secord (2008) | ||
| †Ignacius graybullianus | 7 | |
| Chriacus sp. | 2 | |
| Secord (2008) | ||
| Princetonia sp. | 4 | |
| Secord (2008) | ||
| Thryptacodon sp. | 1 | |
| Secord (2008): "Thryptacodon cf. antiquus" | ||
| †Ectocion osbornianus | 9 | |
| †Haplomylus simpsoni | 1 | |
| †Esthonyx ancylion | 1 | |
| †Arctostylops steini | 1 | |
| †Didymictis proteus (viverravid) | 3 | |
| Polly (1997): "Didymictis protenus protenus" | ||
| Viverravus bowni = †Viverravus cf. laytoni (viverravid) | 8 | |
| Krause (1986): "Viverravus sp." said to be new | ||
| †Uintacyon rudis | 1 | |
| Tytthaena sp. | 1 | |
| Secord (2008): cf. | ||
| Paramys atavus = †Acritoparamys atavus | 32 | |
| apparently also includes 17 specimens of "Paramys sp." | ||
| †Acritoparamys atwateri | 8 | |
| Secord (2008) | ||
| †Microparamys cheradius | 19 | |
| Ivy (1990): one specimen of Rose''s is definitely this species: the type and others appear to have been collected later | ||
| †Microparamys cf. minutus | 1 | |
| Secord (2008) | ||
| †Paramys taurus | 7 | |
| (Secord (2008) | ||
| Reithroparamys sp. | 3 | |
| Ivy (1990) | ||