Jupiter Formation

The Jupiter Formation is a geologic formation in Quebec, well-exposed in the southern third of Anticosti Island and lying in the St Lawrence River Valley.[1] It preserves fossils dating back to the Silurian period.

Jupiter Formation
Stratigraphic range: Early Silurian (Aeronian-Telychian)
TypeGeological formation
Sub-unitsFrom the base upwards:
  • Goéland Member
  • East Point Member
  • Richardson Member
  • Cybèle Member
  • Ferrum Member
  • Pavillon Member
OverliesGun River Formation[1]
Thickness167 meters[1]
Location
Region Quebec
Country Canada
Type section
Named forJupiter River
Named bySchuchert and Twenhofel[1]
Year defined1910[1]

Fossil content
Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
 Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Trace Fossils
Trace fossils
GenusSpeciesPresence MaterialNotesImages
Klemmatoica K. linguliforma Goéland Member.[2] Associated with the brachiopod Rowellella and the shell of a Phanerotrema.[2]
Trypanites Goéland Member.[3] Borings in gastropod shells.[3]

Vertebrates
Conodonts
GenusSpeciesPresence MaterialNotesImages
Icriodella I. deflecta Lower two members.[4] Material originally thought to be from the Gun River Formation.[4]

Invertebrates
Brachiopods
GenusSpeciesPresence MaterialNotesImages
Clorinda C. (Phricoclorinda) chaloupensis Cybèle Member.[5] A749 (112, mostly well-preserved); A850 (178); A937 (about 100,some embedded in small blocks); A939 (44); A1040 (105); A1047 (1); A1064b (76); A1125 (68).[5]
C. tumidula Goéland, Richardson, Ferrum and Pavillon Members.[5]
C. superundata Goéland Member[5]
Costistricklandia C. brevis Pavillon Member.[5] "A279b (1 broken ventral valve, 1 small slab with interiors exposed) and A333 (>10 fragmentary, disarticulated valves)".[5]
C. gaspeensis Pavillon Member (top).[5] A 107-108 (1); A 279b (5 broken valves on small slab); A281 (3); A418-5 (10 valves on slabs); A554 (2).[5]
Dihelictera D. acrolopha East Point Member.[6] Several hundred specimens.[6]
Ehlersella E. davidsonii Cybèle and Ferrum members.[5]
E. transulcata Basal Ferrum Member.[5] A 185 (a crushed shell) and A 1066b (32, variously damaged).[5]
Joviatrypa J. brabyla Lower Goéland Member.[6] Several thousand specimens.[6]
Microcardinalia M. (Chiastodoca) salterii Ferrum Member[5]
M. (Chiastodoca) richardsoni Goéland and Richardson members.[5]
M. (Chiastodoca) fabatina Upper Ferrum Member.[5] A101 (270 specimens).[5]
M. (Dauphinella) divaricata Cybèle and Ferrum members.[5]
M. (Dauphinella) melissa Uppermost Ferrum Member and Pavillon Member.[5]
M. (Dauphinella) sp. Ferrum and Pavillon Members.[5] A255 (16 free shells, 6 slabs with shells in life position) and A108 (1 specimen).[5]
Parastrophinella P. ops Upper Richardson Member.[5] A1158 (3 shells).[5]
P. sp. East Point Member and Ferrum Member.[5] A863 (1 shell) and A959 (1 shell).[5]
Pentameroides P. subrectus Pavillon Member.[5] "A333 (about 1 conjoined shell; 40 incomplete specimens), A 1395 (6 conjoined shells, 12 ventral valves)".[5]
Pentamerus P. oblongus Richardson, Cybèle, Ferrum and Pavillon Members.[5]
P. palaformis Goéland Member.[5] Also found in the Gun River Formation.
Rowellella R.? anticostiensis Goéland Member.[2] Specimen associated with the shell of a Phanerotrema and the trace fossil Klemmatoica linguliforma.[2] A lingulid.
Stricklandia S. gwelani Goéland Member.[5] Also found in the Gun River Formation.
S. planirostrata Ferrum Member.[5]
Corals
GenusSpeciesPresence MaterialNotesImages
Acidolites A. sp. An unnamed species of the genus.[7]
Cornulitids
GenusSpeciesPresence MaterialNotesImages
Conchicolites Goéland Member.[2] Two individuals encrusting the surface of a Clathrodictyon, which itself is associated with a Phanerotrema shell.[2]
Echinoderms
GenusSpeciesPresence MaterialNotesImages
Perforocycloides P. nathalieae Cybèle Member.[8] MPEP335.7.[8] A cyclocystoid.
Rhenopyrgus R. viviani Cybèle Member to Pavillon Member.[9] An edrioasteroid.
Gastropods
GenusSpeciesPresence MaterialNotesImages
Phanerotrema P. sp. Goéland Member.[3][2] Shells, some with Trypanites borings or other associated organisms.[3][2] A phanerotrematid.
Sponges
GenusSpeciesPresence MaterialNotesImages
Clathrodictyon Goéland Member.[2] Specimen found growing on a Phanerotrema shell.[2] A stromatoporoid.
Trilobites
GenusSpeciesPresence MaterialNotesImages
Encrinurus E. deomenos [10]

See also

References
  1. Copper, P.; Long, D.G.F. (31 October 1990). "Stratigraphic revision of the Jupiter Formation, Anticosti Island, Canada: a major reference section above the Ordovician-Silurian boundary". Newsletters on Stratigraphy. 23 (1): 11–36. doi:10.1127/nos/23/1990/11. ISSN 0078-0421.
  2. Ove, Tapanila, Leif Ebbestad, Jan (2008). Benthic island community on the back of a snail: Silurian, Anticosti Island, Canada. Uppsala universitet, Evolutionsmuseet. OCLC 1235121208.{{cite book}}: CS1 maint: multiple names: authors list (link)
  3. Ebbestad, Jan Ove R.; Tapanila, Leif (9 June 2005). "Non-predatory borings in Phanerotrema (Gastropoda), Early Silurian, Anticosti Island, Québec, Canada". Palaeogeography, Palaeoclimatology, Palaeoecology. 221 (3): 325–341. doi:10.1016/j.palaeo.2005.03.003. ISSN 0031-0182.
  4. Copper, Paul; Long, Darrel G. F.; Jin, Jisuo (2012). "The Early Silurian Gun River Formation of Anticosti Island, eastern Canada: A key section for the mid-Llandovery of North America". Newsletters on Stratigraphy. 45 (3): 263. doi:10.1127/0078-0421/2012/0024. ISSN 0078-0421.
  5. Jin, Jisuo; Copper, Paul. "Late Ordovician and Early Silurian pentamerid brachiopods of Anticosti Island, Québec, Canada". Palaeontographica Canadiana.
  6. Copper, Paul (September 1995). "Five new genera of Late Ordovician-Early Silurian brachiopods from Anticosti Island, eastern Canada". Journal of Paleontology. 69 (5): 846–862. doi:10.1017/s0022336000035526. ISSN 0022-3360. S2CID 132079646.
  7. Dixon, O. A. (January 1986). "The heliolitid coral Acidolites in Ordovician–Silurian rocks of eastern Canada1". Journal of Paleontology. 60 (1): 26–52. doi:10.1017/S002233600002148X. ISSN 0022-3360. S2CID 130759173.
  8. Ewin, Timothy A. M.; Reich, Mike; Graham, Mark R.; Cournoyer, Mario E. (1 December 2019). "Perforocycloides nathalieae new genus and species, an unusual Silurian cyclocystoid (Echinodermata) from Anticosti Island, Québec, Canada". PalZ. 93 (4): 625–635. doi:10.1007/s12542-019-00483-w. hdl:10141/622663. ISSN 1867-6812.
  9. Ewin, T. A. M.; Martin, M.; Isotalo, P.; Zamora, S. (2020). Universidad de Zaragoza. "New rhenopyrgid edrioasteroids (Echinodermata) and their implications for taxonomy, functional morphology, and paleoecology". Journal of Paleontology. 94: 115–130. doi:10.1017/jpa.2019.65. ISSN 0022-3360. S2CID 204263950.
  10. "The Silurian trilobite Encrinurus punctatus (Wahlenberg) and allied species | The Palaeontological Association". www.palass.org. Retrieved 19 September 2022.


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