NMVPL1602. Gordon River Road Section. 19 km west of Maydena) (Ordovician of Australia)

Where: Tasmania, Australia (42.7° S, 146.4° E: paleocoordinates 10.1° N, 165.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Tetragraptus approximatus graptolite zone, Mt. Field Siltstone Member (Florentine Valley Formation), Lancefieldian (484.3 - 474.9 Ma)

• Near top of member. Laurie (1980) shows 2 beds in this range. Originally given as La1b. However, is more probably Lancefieldian 3

• group of beds-level stratigraphic resolution

Environment/lithology: marine; yellow siltstone

• yellow siltstone

Size class: macrofossils

Preservation: cast

Primary reference: P. A. Jell and B. Stait. 1985. Tremadoc trilobites from the Florentine Valley Formation, Tim Shea area, Tasmania. Memoirs of the Museum of Victoria 46:1-33 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 165772: authorized by Pete Wagner, entered by Pete Wagner on 28.01.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Pliomeridae
 Harpetida - Harpetidae
Scotoharpes lauriei n. sp. Jell and Stait 1985 trilobite
 Asaphida - Hungaiidae
Asaphopsoides florentinensis Etheridge 1905 trilobite
 Asaphida - Asaphidae
Asaphellus cf. trinodosus Chang 1949 trilobite
 Corynexochida - Leiostegiidae
Chosenia adumsensis n. sp. trilobite
 Proetida - Hystricuridae
"Hystricurus lewisi" = Tasmanaspis lewisi Kobayashi 1940 trilobite
Hystricurus cf. robustus Ross 1951 trilobite
Strophomenata
 Billingsellida - Polytoechiidae
Tritoechia lewisi Brown 1948