Slite Bed g Tentaculitids (Silurian of Sweden)

Where: Gotland, Sweden (57.7° N, 18.8° E: paleocoordinates 21.4° S, 2.8° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Slite Beds Formation, Sheinwoodian (433.4 - 430.5 Ma)

• Correlation from Jeppsson (1983), Fossils and Strata 15:128.

•Might now be Ryssnäs formation (PJW).

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; limestone

• SEP: Silurian of Gotland has been variably described as a ramp and platform. Based on my read of the literature, I think if falls best into the ramp category. From Samtleben et al. (1996). Geol. Rundsch 85:278-292; "...this unit consists of a carbonate platform with reef mounds and surrounding shoal sediments of mostly pure biodetritic and pleoidal limestones. Here slow and discontinuous accumulation of carbonate material continued in a very shallow water but under normal marine conditions....to the south and southwest the carbonate platform passes with a conspicuous slope into a deeper shelf basin where a uniform alternation of micritic limestones and marls accumulated." Based on information provided in this collection, it is difficult to tell which facies is represented but I have assumed that it represents the more extensive shallow subtidal facies.

Primary reference: K. Larsson. 1979. Silurian tentaculitids from Gotland and Scania. Fossils and Strata 11:1-180 [M. Foote/M. Foote/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 13547: authorized by Michael Foote, entered by Michael Foote on 12.04.2002, edited by Mihaela Krause and Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Cheiruridae
Deiphon globifrons2 trilobite
Sphaerexochus scabridus2 Angelin 1854 trilobite
Paragastropoda
 Mimospirida - Onychochilidae
Onychochilus physa n. gen. n. sp.1
Onychochilus physa n. gen. n. sp.1 Lindström 1884
Gastropoda
 Trochonematoidea - Lophospiridae
Loxoplocus gothlandicus3, "Murchisonia munda" = Frodospira munda1, "Murchisonia imbricata" = Frodospira imbricata1
Loxoplocus gothlandicus3 Ulrich and Scofield 1897 snail
"Murchisonia munda" = Frodospira munda1 Lindström 1884 snail
"Murchisonia imbricata" = Frodospira imbricata1 Lindström 1884 snail
 Euomphalina - Euomphalidae
"Pleurotomaria alata" = Euomphalopterus alatus1, Poleumita rugosa3
"Pleurotomaria alata" = Euomphalopterus alatus1 Wahlenberg 1821 snail
Poleumita rugosa3 Sowerby 1814 snail
Oriostoma discors rugosum
 Euomphalina - Holopeidae
"Euomphalus triquestra" = Pachystrophia triquestra1
"Euomphalus triquestra" = Pachystrophia triquestra1 Lindström 1884 snail
 Euomphalina - Pseudophoridae
"Trochus gotlandicus" = Siluriphorus gotlandicus1, "Trochus undulans" = Siluriphorus undulans1
"Trochus gotlandicus" = Siluriphorus gotlandicus1 Lindström 1884 snail
"Trochus undulans" = Siluriphorus undulans1 Lindström 1884 snail
 Murchisoniina - Luciellidae
"Pleurotomaria limata" = Prosolarium limata1
"Pleurotomaria limata" = Prosolarium limata1 Lindström 1884 snail
 Murchisoniina - Gosseletinidae
"Pleurotomaria aequilatera" = Spiroraphe aequilatera1
"Pleurotomaria aequilatera" = Spiroraphe aequilatera1 Wahlenberg 1821 snail
 Murchisoniina - Murchisoniidae
"Murchisonia attenuata" = Michelia whiteavesi1
"Murchisonia attenuata" = Michelia whiteavesi1 Clarke and Ruedemann 1903 snail
 Murchisoniina - Loxonematidae
Holopella teres1 Lindström 1884 snail
Tentaculita
 Volynitida - Turmalitidae
 Volynitida - Dicricoconidae