Tytherington Quarry, Fissure 2 (Bristol Channel) (Triassic of the United Kingdom)

Also known as ST 660 890, ST 660890

Where: England, United Kingdom (51.6° N, 2.4° W: paleocoordinates 36.1° N, 0.9° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Rhaetian (208.5 - 201.3 Ma)

• Rhaetian age is based upon "non-reworked" palynomorphs and the lithology, both of which indicate age equivalence to the Late Westbury Formation (Lower Rhaetian), Penarth Group, of Whiteside (1983) and Whiteside and Marshall (1986). Tytherington fissure fills are not necessarily contemporaneous (Fraser 1994).

• bed-level stratigraphic resolution

Environment/lithology: fissure fill; limestone and green, red marl

• Marginal marine environment. "Fissures were formed in the Late Triassic by solutional and tectonic processes (Whiteside 1983) and were infilled by terrestrial deposits that derived from a small limestone island."
• Bones are from a detrital limestone infilling of the Lower Carboniferous Black Rock Limestone. Fissure material is "red and green marls, breccias and conglomerate."

Size classes: macrofossils, mesofossils

Collected by J. Marshall & D. Whiteside in 1975

Collection methods: bulk, chemical, sieve,

• University of Bristol, Geology Department. The Fissure 2 site has been destroyed by quarrying, but uprepared blocks containing fossils are retained in the collections at Bristol. Greater than 1000 specimens.

Primary reference: J. E. A. Marshall and D. I. Whiteside. 1980. Marine influence in the Triassic "uplands". Nature 287:627-628 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46889: authorized by Robin Whatley, entered by Robin Whatley on 25.01.2005, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• Whiteside states that "Clevosaurus is found in the same faunal assemblage as Diphydontosaurus in three fissure deposits at Tytherington." It is not clear whether Clevosaurus occurs at Fissure 2.
Gastropoda
  -
Gastropoda indet.4 Cuvier 1797 snail
Chondrichthyes
 Hybodontiformes - Polyacrodontidae
Polyacrodus sp.4 Jaekel 1889 elasmobranch
 Ctenacanthiformes -
Ctenacanthoidea indet.4 Zangerl 1981 elasmobranch
scale
Osteichthyes
 Actinopterygii -
Actinopterygii "indet. 1"2 Cope 1887 ray-finned fish
"morphotype 1"
Actinopterygii "indet. 2"2 Cope 1887 ray-finned fish
BRSUG 29372-947; "morphotype 2"
Actinopterygii "indet. 3"2 Cope 1887 ray-finned fish
BRSUG 29372-1435; "morphotype 3"
Actinopteri
 Palaeonisciformes -
Severnichthys sp.4 Storrs 1994
 Palaeonisciformes - Palaeoniscidae
Gyrolepis sp.3 Agassiz 1843
 Pholidophoriformes - Pholidophoridae
Pholidophorus sp.4 Agassiz 1843
a few fish scales, "probably Pholidophorus"
Reptilia
 Archosauria -
Archosauria indet.4 Cope 1869 archosaur
Archosauria "indet. 2"2 Cope 1869 archosaur
BRSUG 29372-525; "morphotype 2"
Archosauria "indet. 3"2 Cope 1869 archosaur
BRSUG 29372-68, 1084, 1096, 1317, 1868; "morphotype 3"
Archosauria "indet. 4"2 Cope 1869 archosaur
BRSUG 29372-12; "morphotype 4"
Archosauria "indet. 5"2 Cope 1869 archosaur
BRSUG 29372-40, ; "morphotype 5"
Archosauria "indet. 6"2 Cope 1869 archosaur
BRSUG 29372-41; "morphotype 6"
Archosauria "indet. 7"2 Cope 1869 archosaur
BRSUG 29372-535, 402, 1772; "morphotype 7"
Archosauria "indet. 8"2 Cope 1869 archosaur
BRSUG 29372-11, 562, 603, 48; "morphotype 8"
Archosauria "indet. 9"2 Cope 1869 archosaur
BRSUG 29372-45, 196, 565; "morphotype 9"
Archosauria "indet. 10"2 Cope 1869 archosaur
BRSUG 29372-13, 1064; "morphotype 10"
Archosauria "indet. 11"2 Cope 1869 archosaur
BRSUG 29372-1617; "morphotype 11"
Archosauria "indet. 12"2 Cope 1869 archosaur
BRSUG 29372-168; "morphotype 12"
Archosauria "indet. 13"2 Cope 1869 archosaur
BRSUG 29372-76; "morphotype 13"
Archosauria "indet. 14"2 Cope 1869 archosaur
BRSUG 29372-1038; "morphotype 14"
Archosauria "indet. 15"2 Cope 1869 archosaur
BRSUG 29372-50; "morphotype 15"
 Saurischia -
Thecodontosaurus antiquus2 Morris 1843 saurischian
 Theropoda -
 Loricata -
aff. Terrestrisuchus sp.4 Crush 1984 crocodilian
 Phytosauria -
"Palaeosaurus" sp.4 Riley and Stutchbury 1836 archosaur
 Eosuchia -
Lepidosauria indet. Haeckel 1866 lepidosaur
 Rhynchocephalia -
Sphenodontia indet.4 rhynchocephalian
 Rhynchocephalia - Clevosauridae
Clevosaurus sp. Swinton 1939 rhynchocephalian
 Rhynchocephalia -
Diphydontosaurus avonis n. gen. n. sp.3 Whiteside 1986 rhynchocephalian
represents 90 % of the fauna in the block prepared.
Planocephalosaurus sp.4 Fraser 1982 rhynchocephalian