Rhaetic Bone Bed, Aust Cliff (Triassic of the United Kingdom)

Where: England, United Kingdom (51.6° N, 2.6° W: paleocoordinates 36.1° N, 0.8° E)

• coordinate stated in text

• small collection-level geographic resolution

When: Avicula contorta zone, Westbury Formation (Penarth Group), Rhaetian (208.5 - 201.3 Ma)

• Bonebed is at the base of the Westbury Formation

• bed-level stratigraphic resolution

Environment/lithology: coastal; lenticular, sandy conglomerate

• marine coastal conditions, possibly a result of a storm or the Rhaeitian transgression
• "lenses of grit or intra-formational conglomerate (or breccia) of sedimentary rocks with a calcite-cemented sandy matrix"

Size classes: macrofossils, mesofossils

Preservation: trace, replaced with phosphate, coprolite

Collected by Johnson; reposited in the BGS, BMNH

Collection methods: core, quarrying, mechanical,

Primary reference: R. Owen. 1842. Report on British fossil reptiles, part II. Report of the British Association for the Advancement of Science 11:60-204 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 57958: authorized by Matthew Carrano, entered by Kaitlin Maguire on 11.01.2006, edited by Matthew Clapham, Matthew Carrano, Roger Benson and Richard Butler

Creative Commons license: CC BY (attribution)

Taxonomic list

Chondrichthyes
 Hybodontiformes - Hybodontidae
Cladodus curtus n. sp.4 Davis 1881 elasmobranch
Hybodus austiensis n. sp.4 Davis 1881 elasmobranch
 Hybodontiformes -
Lissodus sp.2, "Acrodus minimus" = Lissodus minimus6
Lissodus sp.2 Brough 1935 elasmobranch
"Acrodus minimus" = Lissodus minimus6 Agassiz 1839 elasmobranch
 Synechodontiformes - Palaeospinacidae
Nemacanthus monilifer n. sp.1 Agassiz 1837 elasmobranch
Nemacanthus filifer n. sp.1 Agassiz 1837 elasmobranch
Nemacanthus minor n. sp.4 Davis 1881 elasmobranch
Actinopteri
 Saurichthyiformes - Saurichthyidae
Saurichthys acuminatus n. sp.9 Agassiz 1844
Osteichthyes
 Dipnoi - Ceratodontidae
Ceratodus sp.6 Agassiz 1838 lungfish
Reptilia
 Theropoda -
Theropoda indet.3 theropod
Theropod teeth
 Choristodera -
Pachystropheus rhaeticus n. sp.2 von Huene 1935 choristodere
Pachystropheus rhaeticus2 von Huene 1935 choristodere
 Sauropterygia -
Plesiosaurus costatus n. sp.5 Owen 1840 plesiosaur
BRSMG Cb 2457 (destroyed holotype)
Plesiosaurus trigonus8 Cuvier 1824 plesiosaur
vertebra
 Ichthyosauria -
Ichthyosauria indet.7 ichthyosaur
BRSMG Cb4063, part of shaft of a tibia; other indeterminate large bones (BRSMG Cb4905, Ce17255, Ce17258)
 Diapsida -
Rysosteus sp. n. gen.
Rysosteus sp. n. gen. Owen 1842 diapsid
anterior dorsal vertebra, Johnson coll. no. 177