river bed immediately downstream from the Four Mile Dam on Thunder Bay River (Devonian of the United States)

Also known as UM Locality 41 (Stumm 1961)

Where: Alpena County, Michigan (45.1° N, 83.4° W: paleocoordinates 33.3° S, 29.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Upper Limestone Unit Member (Four Mile Dam Formation), Givetian (387.7 - 382.7 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: gray, argillaceous limestone

• ... the Four Mile Dam Limestone contains a lower unit of dark gray, slightly argillaceous, coral biomicrite of unknown thickness and an upper unit of beige, crinoidal biosparite up to 4 feet thick. The upper unit is a small, crudely lenticular, crinoidal debris bank (Tyler, J. H., unpublished Ph.D. thesis, University of Michigan, 1963) which contains a rich and varied fauna with numerous species of gastropods, most of which have not been reported from correlative Centerfieldian units elsewhere.

Size class: macrofossils

Collected by J. Tyler; reposited in the UMMP

Primary reference: J. H. Tyler. 1965. Gastropods from the Middle Devonian Four Mile Dam Limestone (Hamilton) of Michigan. Journal of Paleontology 39(3):341-349 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 85061: authorized by Pete Wagner, entered by Pete Wagner on 24.11.2008, edited by Bethany Allen

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Anthozoa
 Favositida - Pachyporidae
Striatopora linneana2, Thamnopora alpenensis2, Thamnopora magniventra2
Striatopora linneana2 tabulate coral
Thamnopora alpenensis2 tabulate coral
Thamnopora magniventra2 Stumm 1961 tabulate coral
Rhynchonellata
 Rhynchonellida - Stenoscismatidae
Atribonium pingue1
Atribonium pingue1 Grant 1965
USNM 141920-22
Gastropoda
 Euomphalina - Pseudophoridae
"Anematina conica n. sp." = Petrochus conica, "Anematina mellaria n. sp." = Petrochus mellaria
"Anematina conica n. sp." = Petrochus conica Tyler 1965 snail
"Anematina mellaria n. sp." = Petrochus mellaria Tyler 1965 snail
 Euomphalina - Euomphalidae
Straparollus (Philoxene) sp.
 Trochoidea - Turbinidae
Turbinilopsis anacarina n. sp.
Turbinilopsis anacarina n. sp. Tyler 1965 snail
 Cyrtoneritida - Orthonychiidae
"Platyceras (Orthonychia) variablis n. sp." = Orthonychia variablis
"Platyceras (Orthonychia) variablis n. sp." = Orthonychia variablis Tyler 1965 snail
 Neritoidea - Naticopsidae
Naticopsis sp.
Naticopsis sp. M'Coy 1844 snail
 Murchisoniina - Murchisoniidae
"Mourlonia lirata n. sp." = Vladanella lirata, Murchisonia (Murchisonia) subulata n. sp.
"Mourlonia lirata n. sp." = Vladanella lirata Tyler 1965 snail
Murchisonia (Murchisonia) subulata n. sp. Tyler 1965 snail
 Murchisoniina - Gosseletinidae
"Bembexia (Genuspira) nodosa n. gen. n. sp." = Genuspira nodosa, Dictyobembix bella n. gen. n. sp.
"Bembexia (Genuspira) nodosa n. gen. n. sp." = Genuspira nodosa Tyler 1965 snail
Dictyobembix bella n. gen. n. sp. Tyler 1965 snail
 Murchisoniina - Eotomariidae
"Trepospira (Angyomphalus) bella n. sp." = Denayella bella
"Trepospira (Angyomphalus) bella n. sp." = Denayella bella Tyler 1965 snail
Tergomya
 Scenelloidea - Scenellidae
? Palaeoscurria sp.
? Palaeoscurria sp. Perner 1903
1Grant 1965; 2Stumm 1961