Aust Cliff, Insect layer (Brodie collection) (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: Cotham Formation (Pernarth Group), Rhaetian (208.5 - 201.3 Ma)

• "The Cotham Beds contain a "landscape marble" development and an insect bearing Eustheria bed, above a comparatively thin development of the Westbury Beds."

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; lithified, fine-grained, concretionary, stromatolitic, argillaceous limestone

• "These late Triassic deposits are marine marginal showing variable salinity (but never fully marine) ‚ĶContemporary dry land lay a short distance west across the estuary in South Wales." Krzeminski & Jarzembowski, 1999
• "fine-grained, agrillaceous algal limestone"Krzeminski & Jarzembowski, 1999

•The specimens occur mainly in blocks of Rhaetian limestone from the top of the section.

Size class: mesofossils

Preservation: mold/impression

Reposited in the BMNH, USNM

Collection methods: quarrying, surface (float), mechanical,

• Repository: also at Yorkshire Museum, York

Primary reference: P. B. Brodie. 1845. A History of the Fossil Insects in the Secondary Rocks of England Accompanied by a Particular Account of the Strata in which they Occur, and of the Circumstances Connected with their Preservation 1-130 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 115246: authorized by Matthew Clapham, entered by Jered Karr on 31.08.2011, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Dicondylia -
Coleoptera indet. Linnaeus 1758 beetle
 Coleoptera - Permosynidae
"Berosus liasinus n. sp." = Hydrobiites giebeli1, "Harpalus liasinus n. sp." = Dinoharpalus liasinus1
"Berosus liasinus n. sp." = Hydrobiites giebeli1 Handlirsch 1906 beetle
Specimen in pl 9, fig 10
"Harpalus liasinus n. sp." = Dinoharpalus liasinus1 Giebel 1856 beetle
Specimen in pl 9, fig 11 of Brodie
 Coleoptera - Coptoclavidae
Holcoptera schlotheimi2 Giebel 1856 beetle
Lacoe 3484 Brodie coll. USNM 61406; YM1983: 739F, 740F, 741F, 742F, 743F, 744F, 745F
 Trichoptera - Necrotauliidae
"Orthophlebia furcata n. sp." = Austaulius furcatus1, "Orthophlebia liasina n. sp." = Austaulius furcatus1
"Orthophlebia furcata n. sp." = Austaulius furcatus1 Giebel 1856 caddisfly
BMNH I.11522 (Specimen in pl 9, fig 16 of Brodie)
"Orthophlebia liasina n. sp." = Austaulius furcatus1 Giebel 1856 caddisfly
BMNH I.11544 (Specimen in pl 9, fig 17 of Brodie), BMNH I.11545
 Neuroptera - Polystoechotidae
Megapolystoechus magnificus3 Tillyard 1933 giant lacewing
Yorkshire museum 1983/755