Pisocrinus-Bouskacrinus Assoc., Bainbridge Limestone Unit 2 (Silurian of the United States)

Where: Missouri (37.8° N, 90.1° W: paleocoordinates 28.5° S, 53.8° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Bainbridge Limestone Formation, Ludlow (427.4 - 423.0 Ma)

• Unit 2 of Bainbridge Limestone (of Bounk 1975 and Barrick 1978). [Lower Moccasin Springs Formation, Bainbridge Group of Lowensant (1949).]

• member-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; shelly/skeletal wackestone and shelly/skeletal, gray grainstone

• "The brachiopod fauna is very diverse and shows affinities both with that of the Henryhous Formation, Oklahoma and the Brownsport Formation, Tennessee...[Few complete crowns]...root systems can be very common in some horizons...little indication of wave disturbance, and some dissociated echinoderm specimens have isolated plates in near proximity, suggesting that variations in clastic input, rather than winnowing, are responsible for the noted differences in skeletal grain percentages. Individual grains slightly to moderately abraded, microborins common. Brachiopos often articulated, but are also major debris contributors. Overall best interpreted as outer BA4 to inner BA 5, somewhat landward of the upper Bainbridge Pisocrinus Association [PBDB coll. 26821] and graptolite-bearing units."

•SEP environmental call based on given info.

• "Varies from moderately to abundantly fossiliferous. There are two common lithologies: earthy red calcilutites with scattered fossil debris seldom exceeding 20% (wackestone) and very fossiliferous, echinoderm-rich red or gray calcilutites to calcarenites with from 50% to as much as 70% skeletal debris (wackestone-packstone textures)."

Collection methods: Table 45.47, which gives abundances.

Primary reference: T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26822: authorized by Michael Foote, entered by Michael Foote on 05.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Amphipsalidocrinidae indet.
"amphipsalidocrinid gen. nov. (microcrinoid)"
? Zophocrinidae "sp. nov. 1"
"'Zophocrinus' gen nov. sp. nov. 1"
? Zophocrinidae "sp. nov. 2"
"'Zophocrinus' gen nov. sp. nov. 2"
Prokopicrinidae "sp. nov. 1"
"prokopicrinid gen. nov. sp. nov. 1"
Prokopicrinidae "sp. nov. 2"
"prokopicrinid gen. nov. sp. nov. 1"
 Phacopida - Dalmanitidae
Dalmanites spp. Barrande 1852 trilobite
Ostracoda indet. Latreille 1802 ostracod
Brachiopoda indet. Cuvier 1805
 Orthotetida - Triplesiidae
Cliftonia sp. n. sp. Foerste 1909
 Orthotetida - Chilidiopsidae
"Coolinia sp." = Fardenia (Coolinia)
"Coolinia sp." = Fardenia (Coolinia) Bancroft 1949
 Strophomenida - Leptestiidae
Leangella sp. Opik 1933
 Strophomenida - Leptaenoideidae
 Strophomenida - Rafinesquinidae
 Strophomenida - Strophonellidae
Strophonella sp. Hall 1879
 Dictyonellida - Eichwaldiidae
 Athyridida - Rhynchospirinidae
Homoeospira sp. Hall and Clarke 1893
 Athyridida - Meristidae
Merista sp. Suess 1851
 Athyridida - Meristellidae
Meristina sp. Hall 1867
 Athyridida - Nucleospiridae
 Spiriferida - Cyrtiidae
Eospirifer sp. Schuchert 1913
 Protorthida - Skenidiidae
 Atrypida - Atrypinidae
 Atrypida - Lissatrypidae
"Lissatrypa henryhousensis" = Lissatrypa, "Nanospira sp." = Lissatrypa
"Lissatrypa henryhousensis" = Lissatrypa
"Nanospira sp." = Lissatrypa Twenhofel 1914
 Rhynchonellida - Rhynchotrematidae
Stegerhynchus sp. Foerste 1909
 Orthida - Rhipidomellidae
Dalejina sp. Havlicek 1953
 Orthida - Dicoelosiidae
 Orthida - Dalmanellidae
 Orthida - Hesperorthidae
 Lingulida - Disciniidae
Orbiculoidea sp. d'Orbigny 1847
 Euomphalina - Platyceratidae
"Platyostoma sp." = Platyceras (Platyostoma) Conrad 1842 snail
Cyclonema fasciata Ball 1938 snail
Bryozoa indet. Ehrenberg 1831
 Glyptocystitoida - Callocystitidae
Callocystitidae indet. Bernard 1895
"callocystitid sp. nov. (plates)"
 Spiraculata -
 Blastoidea -
Fissiculata indet. Jaekel 1918
listed as "'Troosticrinus' dubius? Rowley (fissiculate)"
 Rhombifera - Caryocrinitidae
 Mitrata -
Mitrata indet. Jaekel 1918
Passalocrinus sp. n. sp. Sea lily
 Disparida -
Disparida "new genus 1" Sea lily
"disparid gen. nov. Sevastopulo and Lane, 1981 (microcrinoid)"
Disparida "new genus 2" Sea lily
"new disparid genus"
Myelodactylus sp. n. sp. Hall 1852 Sea lily
? Desmacriocrinus sp. n. sp. Strimple 1966 Sea lily
 Pisocrinida - Pisocrinidae
"Parapisocrinus quinquelobus" = Parapisocrinus quinquelobus Ausich and Copper 2010 Sea lily
"Pisocrinus gorbyi" = Parapisocrinus quinquelobus Ausich and Copper 2010 Sea lily
Subgenus listed only as (G.)
Pisocrinus (Pisocrinus) "?sp. nov. 1" de Koninck 1858 Sea lily
Pisocrinus (Pisocrinus) "?sp. nov. 2" de Koninck 1858 Sea lily
Pisocrinus spatulatus Sea lily
Subgenus listed only as (G.)
 Calceocrinida - Calceocrinidae
Grypocrinus sp. n. sp. Strimple 1963 Sea lily
Eohalysiocrinus sp. n. sp. Prokop 1970 Sea lily
 Disparida - Allagecrinidae
Litocrinus sp. n. sp. Lane and Sevastopulo 1982 Sea lily
 Homocrinida - Homocrinidae
Homocrinus sp. n. sp. Hall 1852 Sea lily
 Cladida -
Amphipsalidocrinus sp. n. sp. Weller 1930 Sea lily
? Lageniocrinus sp. n. sp. de Koninck 1854 Sea lily
 Cladida - Botryocrinidae
Botryocrinus "sp. nov. 1" Angelin 1878 Sea lily
Botryocrinus "sp. nov. 2" Angelin 1878 Sea lily
 Cyathocrinida - Thalamocrinidae
 Cyathocrinida - Gasterocomidae
 Cyathocrinida - Streblocrinidae
Lampadosocrinus sp. n. sp. Strimple and Koenig 1956 Sea lily
 Camerata -
Camerata indet. Wachsmuth and Springer 1885 Sea lily
"new camerate, uncertain affinities"
 Monobathrida -
 Monobathrida - Hirneacrinidae
Hagnocrinus sp. n. sp. Frest and Strimple 1977 Sea lily
Hagnocrinus balli Frest and Strimple 1977 Sea lily
Hagnocrinus bainbridgensis Frest and Strimple 1977 Sea lily
 Diplobathrida -
Lampterocrinus sp. n. sp. Roemer 1860 Sea lily
Anthozoa indet. Ehrenberg 1834
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral