Four Mile Dam Formation

|Unidentified

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|"Two partial fin spines (JS 120, JS 121)".{{Cite journal |last=Stack |first=Jack |last2=Sallan |first2=Lauren |date=2018-09-20 |title=An examination of the Devonian fishes of Michigan |url=https://www.researchgate.net/publication/327778213_An_examination_of_the_Devonian_fishes_of_Michigan |journal=PeerJ |volume=6 |issue=2 |doi=10.7717/peerj.5636|doi-access=free |pmc=6151260 }}

| "Distinct from named acanthodians (Gyracanthus, Machaeracanthus, and Oracanthus) and chondrichthyans (Tamiobatis and Acondylacanthus) reported from Michigan".

|File:An examination of the Devonian fishes of Michigan fig-5-a.png

|A. formosa

| {{Cite journal |last=Orr |first=R. William |date=1971 |title=Conodonts from Middle Devonian Strata from the Michigan Basin |url=https://scholarworks.iu.edu/dspace/handle/2022/229 |language=en-US}}

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| Also found in the Detroit River, Traverse, Dundee, Bell, Alpena and Norway Point formations.

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|B. devonicus

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|Also found in the Detroit River, Traverse, Antrim, Alpena and Norway Point formations.

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|I. latericrescens latericrescens

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|Also found in the Traverse, Bell, Ferron Point, Genshaw, Newton Creek, Alpena, Norway Point, Potter Farm and Thunder Bay formations.

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|O. willsi

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|Also found in the Detroit River, Traverse, Antrim, Dundee, Alpena and Norway Point formations.

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|P. varcus

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|Also found in the Traverse, Antrim, Alpena, Norway Point and Thunder Bay formations.

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|?M. sp.

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|"A partial head shield (32M)".

|A petalichthyid.

|File:An examination of the Devonian fishes of Michigan fig-8-a.png

|?M. sp.

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|39 specimens, including potential juveniles.

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|File:An examination of the Devonian fishes of Michigan fig-5-b.png

|Unidentified

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|"One specimen of an armour plate (JS 4)".

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|File:An examination of the Devonian fishes of Michigan fig-5-c.png

|P. rockportensis

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|"One specimen of an armor fragment (JS 101)".

|A coccosteid.

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|D. distans

|Four Mile Dam, Thunder Bay River, Alpena County, Michigan.{{Cite journal |last=Imbrie |first=John |date=1959 |title=Brachiopods of the Traverse group (Devonian) of Michigan. Part 1, Dalmanellacea, Pentameracea, Strophomenacea, Orthotetacea, Chonetacea, and Productacea. Bulletin of the AMNH ; v. 116, article 4 |url=https://digitallibrary.amnh.org/handle/2246/1258 |language=en-US}}

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|Also found in the Hungry Hollow Formation and Logansport Formation.

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|L. radicans

|Four Mile Dam, Thunder Bay River, Alpena County, Michigan.

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|Also found in the Norway Point, Gravel Point, Alpena and Genshaw formations.

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|L. emmetensis

|Dock Street clay member.

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|Also found in the Alpena Limestone and Gravel Point Formation.

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|M. gibbosa

|Four Mile Dam, Thunder Bay River, Alpena County, Michigan.

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|Also found in the Hungry Hollow Formation and Logansport Formation.

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|O. oligorhachis

|Four Mile Dam, Thunder Bay River, Alpena County, Michigan.

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|Also found in the Gravel Point Formation.

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|P. alpenensis

|Dock Street clay member.

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|Also found in the Alpena Limestone and Gravel Point Formation.

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|Dock Street clay.

|A complete specimen.

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|P. lirella

|Dock Street clay member.

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|Also found in the Norway Point Formation and Alpena Limestone.

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|S. anomala

|Possibly the Dock Street clay member.

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|Also found in the Gravel Point Formation.

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|Four Mile Dam, Thunder Bay River, Alpena County, Michigan.

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|S. mutocosta

|Four Mile Dam, Thunder Bay River, Alpena County, Michigan.

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|Also found in the Bell, Rockport Quarry, Ferron Point, Beebe School, Thunder Bay and Potter Farm formations.

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|S. erratica

|Dock Street clay member.

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|Also found in the Alpena Limestone and Gravel Point Formation.

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|Dock Street clay member.

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|Also found in the upper Gravel Point Formation.

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|Dock Street clay member.

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|Also found in the Alpena Limestone and Gravel Point Formation.

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|Dock Street clay member.

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|Also found in the Alpena Limestone.

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|Dock Street clay member and overlying crystalline limestone beds.

|Several specimens.

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|R. penelope traversensis

| Thunder Bay River, Alpena County, Michigan.

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|A. cooperi

|{{Cite journal |last=Watkins |first=J. Lloyd |date=1959 |title=Middle Devonian Auloporid Corals from the Traverse Group of Michigan |url=https://www.jstor.org/stable/1300915 |journal=Journal of Paleontology |volume=33 |issue=5 |pages=793–808 |issn=0022-3360}}

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|Also found in the Plum Brook shale, Silica shale and Potter Farm Formation.

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| Dock Street clay member.

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| Also found in the Silica Shale, Ferron Point Formation, Petoskey Formation, Hungry Hollow Formation, Widder Shale, Wanakah shale and Centerfield Limestone.

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|A. conferta

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|Also found in the Bell, Ferron Point, Gravel Point, Genshaw, Alpena, Potter Farm, Petoskey and Hungry Hollow formations.

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|Also found in the Genshaw Formation, Alpena Limestone and Petoskey Formation.

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|P. concentricum

|Dock Street clay member.

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|Also found in the Ferron Point Formation, Gravel Point Formation and Alpena Limestone.

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|A. conica

|Upper limestone unit.{{Cite journal |last=Tyler |first=John H. |date=1965 |title=Gastropods from the Middle Devonian Four Mile Dam Limestone (Hamilton) of Michigan |url=https://www.jstor.org/stable/1301707 |journal=Journal of Paleontology |volume=39 |issue=3 |pages=341–349 |issn=0022-3360}}

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|An elasmonematid.

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|Upper limestone unit.

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|An elasmonematid, very rare in the Four Mile Dam Limestone.

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|B. (Genuspira) nodosa

|Upper limestone unit.

|About 35 specimens.

|An eotomariid and the most abundant gastropod in the formation.

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|D. bella

|Upper limestone unit.

|5 specimens.

|An eotomariid.

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|M. lirata

|Upper limestone unit.

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|An eotomariid.

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|M. (Murchisonia) subulata

|Upper limestone unit.

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|A murchisoniid, extremely rare in the formation.

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|N. sp.

|Upper limestone unit.

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|A neritopsid, extremely rare in the formation.

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|P.? sp.

|Upper limestone unit.

|3 poorly preserved ventral molds.

|A metoptomatid.

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|P. (Platyceras) bartlettense

|Dock Street Clay Member.

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|A platyceratid.

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|Dock Street Clay Member.

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|A platyceratid.

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|Upper limestone unit.

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|A platyceratid.

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|Genus A sp. A

|Upper limestone unit.

|Relatively numerous steinkerns.

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|Genus B sp. B

|Upper limestone unit.

|One very poorly preserved steinkern with a few small shell patches (YPM 23684).

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|S. sp.

|Upper limestone unit.

|One specimen (UMMP 47377).

|An eotomariid.

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|S. (Philoxene) sp.

|Upper limestone unit.

|3 poorly preserved specimens.

| An euomphalid.

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|T. (Angyomphalus) bella

|Upper limestone unit.

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|A raphistomatid, very rare in the Four Mile Dam Limestone.

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|T. anacarina

|Upper limestone unit.

|Abundant specimens.

|An anomphalid.

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|A. anacolumna

| On Thunder Bay River.{{Cite journal |last=Tyler |first=John H. |date=1964 |title=Anostylostroma anacolumna n. sp. from the Four Mile Dam Limestone (Hamilton), Alpena County, Michigan |url=https://www.jstor.org/stable/1301606 |journal=Journal of Paleontology |volume=38 |issue=5 |pages=885–886 |issn=0022-3360}}

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| A stromatoporoid.

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|C. rara

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|{{Cite journal|last=Stumm|first=Erwin|date=1953|title=Trilobites of the Devonian Traverse Group of Michigan|url=https://deepblue.lib.umich.edu/bitstream/handle/2027.42/48269/ID108.pdf?sequence=2|journal=University of Michigan Press - Museum of Paleontology}}

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|D. (Monodechenella) macrocephala

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|Also found in the Hamilton Group.

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|Also known from the Hamilton Group.

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|E. rana

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|Originally reported as Phacops rana. Also found in the Hamilton, Hungry Hollow, Widder, Plum Brook, Prout, Ten Mile Creek, Alpena, Norway Point and Gravel Point formations.

|File:Phacops rana.jpg

|G. aequituberculatus

|Dock Street clay member.

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|Also found in the Norway Point and Gravel Point formations.

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|Dock Street clay member.

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|Also found in the Gravel Point Formation.

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|style="background:#fbdddb;" |P. rana

|style="background:#fbdddb;" |

|style="background:#fbdddb;" |

|style="background:#fbdddb;" |Reassigned to the genus Eldredgeops.

|style="background:#fbdddb;" |

|P. (Crassiproetus) traversensis

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| Also known from the Gravel Point Formation.

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