Sheep Pass Formation

{{Short description|Geologic formation in Nevada, United States}}

{{Infobox rockunit

| name = Sheep Pass Formation

| image =

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| type = Geological formation

| age = Latest Cretaceous to Paleogene

| prilithology =

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| region = Nevada

| country = United States

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| subunits = 6 members (A to F)

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}}

The Sheep Pass Formation is a geologic formation in Nevada. It preserves fossils dating back to the Paleogene period.

Fossil content

=Vertebrates=

class="wikitable" align="center"
colspan="6" align="center" \| Mammals
Genus	Species	Presence !Material	Notes	Images
Apatemys \|A. bellus \|Near Ely, Nevada.{{Cite book \|last=Emry \|first=Robert J. \|title=Dawn of the Age of Mammals in the northern part of the Rocky Mountain Interior, North America \|date=1990-01-01 \|chapter=Mammals of the Bridgerian (middle Eocene) Elderberry Canyon Local Fauna of eastern Nevada \|series=Geological Society of America Special Papers \|volume=243 \|pages=187–210 \|chapter-url=https://pubs.geoscienceworld.org/gsa/books/book/378/chapter/3797114/Mammals-of-the-Bridgerian-middle-Eocene-Elderberry \|language=en \|doi=10.1130/SPE243-p187\|isbn=0-8137-2243-8 }} \| \|An apatothere. \|
Elymys \|E. complexus \|Near Ely, Nevada.{{Cite journal \|last1=Emry \|first1=Robert J. \|last2=Korth \|first2=William W. \|date=1989 \|title=Rodents of the Bridgerian (Middle Eocene) Elderberry Canyon Local Fauna of Eastern Nevada \|url=http://dx.doi.org/10.5479/si.00810266.67.1 \|journal=Smithsonian Contributions to Paleobiology \|issue=67 \|pages=1–14 \|doi=10.5479/si.00810266.67.1 \|issn=0081-0266}} \| \|A rodent, possibly of the family Zapodidae. \|
Ischyromyidae \| \|Near Ely, Nevada. \| \| \|
Knightomys \| \|Near Ely, Nevada. \| \|A rodent represented by material not assignable to species. \|
Mattimys \| \|Near Ely, Nevada. \| \|A rodent represented by material not assignable to species. \|
Microparamys \|M. sambucus \|Near Ely, Nevada. \| \|A rodent. \|
Notharctus \|N. tenebrosus \| Near Ely, Nevada. \|Upper and lower jaws.{{Cite journal \|last1=Perry \|first1=Jonathan M. G. \|last2=Gunnell \|first2=Gregg F. \|last3=Emry \|first3=Robert J. \|date=2017-07-04 \|title=New cranial material of Notharctus (Mammalia, Primates, Notharctidae) from the Sheep Pass Formation, Elderberry Canyon, Nevada, with implications for incisor morphology and paleogeography of notharctine primates \|url=https://doi.org/10.1080/02724634.2017.1331914 \|journal=Journal of Vertebrate Paleontology \|volume=37 \|issue=4 \|pages=e1331914 \|doi=10.1080/02724634.2017.1331914 \|bibcode=2017JVPal..37E1914P \|s2cid=133982802 \|issn=0272-4634\|url-access=subscription }} \| A primate. \|File:Notharctus tenebrosus paris.JPG
Nyctitheriidae \| \|Near Ely, Nevada. \| \|At least one nyctitheriid present. \|
Palaeochiropteryx \|P. sambuceus \|"Elderberry Canyon Quarry in the Egan Range near Ely, White Pine County".{{Cite journal \|last1=Czaplewski \|first1=Nicholas J. \|last2=Morgan \|first2=Gary S. \|last3=Emry \|first3=Robert J. \|last4=Gignac \|first4=Paul M. \|last5=O'Brien \|first5=Haley D. \|date=2022-05-25 \|title=Three New Early Middle Eocene Bats (Mammalia: Chiroptera) from Elderberry Canyon, Nevada, USA \|url=https://www.researchgate.net/publication/360886645 \|journal=Smithsonian Contributions to Paleobiology \|issue=106 \|pages=2–25 \|doi=10.5479/si.19874677 \|s2cid=249114343 \|issn=1943-6688\|doi-access=free }} \|Partial skeleton (USNM PAL 417350) and left dentary (USNM PAL 706598). \|A palaeochiropterygid bat. \|File:Palaeochiropteryx - 3d Reconstruction.jpg
Pantolestes \|P. longicaudus \|Near Ely, Nevada. \| \|A pantolestid. \|
Pauromys \|P. exallos \|Near Ely, Nevada. \| \|A rodent. \|
rowspan=2\|Reithroparamys \|R. delicatissimus \|Near Ely, Nevada. \| \|A rodent. \|
cf. R. huerfanensis \|Near Ely, Nevada. \| \|A rodent. \|
Sciuravus \|S. sp. \|Near Ely, Nevada. \| \|A rodent represented by material not assignable to species. \|
Sonor \|S. handae \|"Elderberry Canyon Quarry in the Egan Range near Ely, White Pine County". \|Left dentary (USNM PAL 544091). \|A vespertilionid bat. \|
cf. Tetrapassalus \|cf. T. mckennai \|Near Ely, Nevada. \| \|An epoicotheriid. \|
Trogolemur \|T. myodes \|Near Ely, Nevada. \| \|An anaptomorphine primate. \|
Volactrix \|V. simmonsae \|"Elderberry Canyon Quarry in the Egan Range near Ely, White Pine County". \|Right and left dentaries. \|An onychonycterid bat. \|

class="wikitable" align="center"

colspan="6" align="center" | Mammals

Genus

Species

Presence

!Material

Notes

Images

Apatemys

|A. bellus

|Near Ely, Nevada.{{Cite book |last=Emry |first=Robert J. |title=Dawn of the Age of Mammals in the northern part of the Rocky Mountain Interior, North America |date=1990-01-01 |chapter=Mammals of the Bridgerian (middle Eocene) Elderberry Canyon Local Fauna of eastern Nevada |series=Geological Society of America Special Papers |volume=243 |pages=187–210 |chapter-url=https://pubs.geoscienceworld.org/gsa/books/book/378/chapter/3797114/Mammals-of-the-Bridgerian-middle-Eocene-Elderberry |language=en |doi=10.1130/SPE243-p187|isbn=0-8137-2243-8 }}

|An apatothere.

Elymys

|E. complexus

|Near Ely, Nevada.{{Cite journal |last1=Emry |first1=Robert J. |last2=Korth |first2=William W. |date=1989 |title=Rodents of the Bridgerian (Middle Eocene) Elderberry Canyon Local Fauna of Eastern Nevada |url=http://dx.doi.org/10.5479/si.00810266.67.1 |journal=Smithsonian Contributions to Paleobiology |issue=67 |pages=1–14 |doi=10.5479/si.00810266.67.1 |issn=0081-0266}}

|A rodent, possibly of the family Zapodidae.

Ischyromyidae

|Near Ely, Nevada.

Knightomys

|Near Ely, Nevada.

|A rodent represented by material not assignable to species.

Mattimys

|Near Ely, Nevada.

|A rodent represented by material not assignable to species.

Microparamys

|M. sambucus

|Near Ely, Nevada.

|A rodent.

Notharctus

|N. tenebrosus

| Near Ely, Nevada.

|Upper and lower jaws.{{Cite journal |last1=Perry |first1=Jonathan M. G. |last2=Gunnell |first2=Gregg F. |last3=Emry |first3=Robert J. |date=2017-07-04 |title=New cranial material of Notharctus (Mammalia, Primates, Notharctidae) from the Sheep Pass Formation, Elderberry Canyon, Nevada, with implications for incisor morphology and paleogeography of notharctine primates |url=https://doi.org/10.1080/02724634.2017.1331914 |journal=Journal of Vertebrate Paleontology |volume=37 |issue=4 |pages=e1331914 |doi=10.1080/02724634.2017.1331914 |bibcode=2017JVPal..37E1914P |s2cid=133982802 |issn=0272-4634|url-access=subscription }}

| A primate.

|File:Notharctus tenebrosus paris.JPG

Nyctitheriidae

|Near Ely, Nevada.

|At least one nyctitheriid present.

Palaeochiropteryx

|P. sambuceus

|"Elderberry Canyon Quarry in the Egan Range near Ely, White Pine County".{{Cite journal |last1=Czaplewski |first1=Nicholas J. |last2=Morgan |first2=Gary S. |last3=Emry |first3=Robert J. |last4=Gignac |first4=Paul M. |last5=O'Brien |first5=Haley D. |date=2022-05-25 |title=Three New Early Middle Eocene Bats (Mammalia: Chiroptera) from Elderberry Canyon, Nevada, USA |url=https://www.researchgate.net/publication/360886645 |journal=Smithsonian Contributions to Paleobiology |issue=106 |pages=2–25 |doi=10.5479/si.19874677 |s2cid=249114343 |issn=1943-6688|doi-access=free }}

|Partial skeleton (USNM PAL 417350) and left dentary (USNM PAL 706598).

|A palaeochiropterygid bat.

|File:Palaeochiropteryx - 3d Reconstruction.jpg

Pantolestes

|P. longicaudus

|Near Ely, Nevada.

|A pantolestid.

Pauromys

|P. exallos

|Near Ely, Nevada.

|A rodent.

rowspan=2|Reithroparamys

|R. delicatissimus

|Near Ely, Nevada.

|A rodent.

cf. R. huerfanensis

|Near Ely, Nevada.

|A rodent.

Sciuravus

|S. sp.

|Near Ely, Nevada.

|A rodent represented by material not assignable to species.

Sonor

|S. handae

|"Elderberry Canyon Quarry in the Egan Range near Ely, White Pine County".

|Left dentary (USNM PAL 544091).

|A vespertilionid bat.

cf. Tetrapassalus

|cf. T. mckennai

|Near Ely, Nevada.

|An epoicotheriid.

Trogolemur

|T. myodes

|Near Ely, Nevada.

|An anaptomorphine primate.

Volactrix

|V. simmonsae

|"Elderberry Canyon Quarry in the Egan Range near Ely, White Pine County".

|Right and left dentaries.

|An onychonycterid bat.

colspan="6" align="center" \| Amphibians
class="wikitable" align="center"
Genus	Species	Presence !Material	Notes	Images
Eorubeta \|E. nevadensis \| Member C (south Egan Range).{{Cite journal \|last1=Bonde \|first1=Joshua W. \|last2=Druschke \|first2=Peter A. \|last3=Hilton \|first3=Richard P. \|last4=Henrici \|first4=Amy C. \|last5=Rowland \|first5=Stephen M. \|date=2020 \|title=Preservation of latest Cretaceous (Maastrichtian)-Paleocene frogs (Eorubeta nevadensis) of the Sheep Pass Formation of east-central Nevada and implications for paleogeography of the Nevadaplano \|url=https://www.researchgate.net/publication/342663799 \|journal=PeerJ \|volume=8 \|pages=e9455 \|doi=10.7717/peerj.9455 \|issn=2167-8359 \|pmc=7341540 \|pmid=32704447 \|doi-access=free }}{{Cite web \|title=Abstract: TWO DISTINCT FROG DEATH ASSEMBLAGES FROM THE SHEEP PASS FORMATION (MAASTRICHTIAN-EOCENE), EAST-CENTRAL NEVADA (2009 Portland GSA Annual Meeting (18-21 October 2009)) \|url=https://gsa.confex.com/gsa/2009AM/webprogram/Paper160933.html \|access-date=2022-09-01 \|website=gsa.confex.com}} \| \| A frog. \|
Palaeobatrachus \|P. occidentalis \|Member B. \| \|A frog. \|

=Invertebrates=

colspan="6" align="center" \| Crustaceans
class="wikitable" align="center"
Genus	Species	Presence !Material	Notes	Images
Clinocypris? \|C.? sp. \| Member B. \| \| An ostracod. \|
Cypridea \|C. bicostata \|Member B. \| \|An ostracod. \|
Paracypridopsis? \|P.? sp. \|Member B. \| \|An ostracod. \|

colspan="6" align="center" \| Molluscs
class="wikitable" align="center"
Genus	Species	Presence !Material	Notes	Images
Hydrobia \| \|Member B. \| \|A snail. \|
Valvata \| \| Member B. \| \| A snail. \|

References

{{cite web|title= Fossilworks: Gateway to the Paleobiology Database|author= ((Various Contributors to the Paleobiology Database))|url= https://www.fossilworks.org|access-date= 17 December 2021}}

Category:Paleogene geology of Nevada

Sheep Pass Formation

Fossil content

=Vertebrates=

=Invertebrates=

See also

References