Belmont (Mitchell undated coll) (Permian of Australia)

Where: New South Wales, Australia (33.0° S, 151.7° E: paleocoordinates 66.5° S, 144.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Belmont Conglomerate Member (Croudace Bay Formation), Changhsingian (254.2 - 252.2 Ma)

• From horizon 70 feet below base of Fassifern Coal, according to Knight (1950). Fassifern coal dated at 253.38 +/- 0.08 Ma and the underlying Upper Pilot A seam at 253.55 +/- 0.06 Ma by Metcalf et al. (2015).

• bed-level stratigraphic resolution

Environment/lithology: pond; lithified, tuffaceous chert

• Insect bed appears to have been deposited in shallow ephemeral floodbasin ponds and is stratigraphically positioned between fast-flowing river and coal swamp deposits. Volcanic ash draped the area, infilling the pools and preserving the taphocoenosis. Switch to contractional deformation in Hunter-Bowen orogeny occurred c. 265 Ma; Sydney basin transitioned into foreland basin.

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Collected by John Mitchell

Primary reference: R. J. Tillyard. 1926. Upper Permian insects of New South Wales Part II. The orders Mecoptera, Paramecoptera and Neuroptera. Proceedings of the Linnean Society of New South Wales 51:265-282 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 122424: authorized by Matthew Clapham, entered by Matthew Clapham on 27.12.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Protelytroptera - Permophilidae
? Permophilus minor n. sp.
? Permophilus minor n. sp. Tillyard 1924 winged insect
Before 1924
 Mecoptera - Permochoristidae
"Permochorista collinsi n. sp." = Mesochorista australica
"Permochorista collinsi n. sp." = Mesochorista australica Tillyard 1918 scorpionfly
Collected by Mr. Collins, in Mitchell coll
 Dicondylia - Permithonidae
Permorapisma biserialis n. gen. n. sp.
Permorapisma biserialis n. gen. n. sp. Tillyard 1926 winged insect
 Coleoptera - Permosynidae
Permosyne affinis n. sp., Permosyne mitchelli n. sp.
Permosyne affinis n. sp. Tillyard 1924 beetle
Before 1924
Permosyne mitchelli n. sp. Tillyard 1924 beetle
Before 1924