Mount Crosby, upper bed (Triassic of Australia)

Also known as Locality B

Where: Queensland, Australia (27.6° S, 152.8° E: paleocoordinates 58.5° S, 101.2° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Mount Crosby Formation, Norian (228.0 - 208.5 Ma)

• Purdy & Cranfield (2013) reported an unpublished SHRIMP date of 226±2 Ma for the Brisbane Tuff. Therefore, the Blackstone Formation may be considered younger than 226 Ma in absolute age. Thus, the Ipswich Coal Measures above the Brisbane Tuff, which is to say, the succession from the Mount Crosby Formation to the top of the Blackstone Formation must now be considered Norian.

• bed-level stratigraphic resolution

Environment/lithology: pond; lithified shale

• Ipswich basin; transtensional rift in intermontane setting. Basin geometry affected by strike-slip movement along West Ipswich fault. Ipswich coal measures deposited near end of rifting phase.

Size classes: macrofossils, mesofossils

Preservation: adpression

Collected by E.C. Dahms

• Repository: Queensland Museum

Primary reference: J. W. Evans. 1971. Some Upper Triassic Hemiptera from Mount Crosby, Queensland. Memoirs of the Queensland Museum 16:145-151 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123797: authorized by Matthew Clapham, entered by Jered Karr on 30.01.2012, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta indet. Linnaeus 1758 insect
QM F6483
 Dicondylia -
Hemiptera indet. Linnaeus 1758 true bug
QM F6450
 Hemiptera - Surijokocixiidae
Tricrosbia minuta n. gen. n. sp.
Tricrosbia minuta n. gen. n. sp. Evans 1971 planthopper
QM F6520
 Hemiptera - Scytinopteridae
Mesoscytina fistulae Lambkin 2016 true bug
QM F6980, F6985
 Hemiptera - Protopsyllidiidae
Triassothea analis Evans 1956 true bug
QM F6523, 6515
 Hemiptera - Dysmorphoptilidae
Trifidella perfecta Evans 1956 true bug
QM F6504; F6400 in Lambkin, 2016
Dysmorphoptiloides elongata Evans 1956 true bug
QM F6493; 6498, 6542, 6502, 6971-6975, 57804-57810 in Lambkin, 2015
 Hemiptera -
Cercopoidea indet. Leach 1815 froghopper
QM 6507 (F6498, 6542 are D. elongata in Lambkin, 2015)
Homoptera indet. Leach 1815 true bug
QM F6491
 Diptera - Crosaphididae
Crosaphis anomala n. gen. n. sp.
Crosaphis anomala n. gen. n. sp. Evans 1971 fly
QM F6508a