Richea Siltstone, Tiger Range, Tasmania (Silurian of Australia)

Where: Tasmania, Australia (43.0° S, 146.0° E: paleocoordinates 1.5° N, 177.9° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Richea Siltstone Formation, Telychian (438.5 - 433.4 Ma)

• griestoniensis or crenulata biozone. Higher parts of formation probably Wenlockian.

• formation-level stratigraphic resolution

Environment/lithology: marine; bioturbated, micaceous siltstone

• See lithology description.
• "The trilobites are preserved as internal and external moulds in fine-grained, micaceous and bioturbated siltstones that were considered by Baillie (in Brown et al. 1989) to have been deposited in a shallow, offshore environment affected by gentle currents. Many of the species are represented by complete or almost complete dorsal exoskeletons, suggesting that they were preserved essentially in situe..."

Primary reference: D. J. Holloway and A. Sandford. 1993. An Early Silurian trilobite fauna from Tasmania. Memoir of the Association of Australasian Palaeontologists 15:85-102 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40017: authorized by Michael Foote, entered by Michael Foote on 14.06.2004, edited by Loic Villier

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Dalmanitidae
Dalmanites tigerensis n. sp. trilobite
 Phacopida - Homalonotidae
Trimerus sp. Green 1832 trilobite
 Phacopida - Calymenidae
Gravicalymene sp. Shirley 1936 trilobite
 Phacopida - Phacopidae
Acernaspis sp. Campbell 1967 trilobite
 Proetida - Aulacopleuridae
Maurotarion mystax n. sp. trilobite
 Proetida - Proetidae
? Latiproetus argaleus n. sp. trilobite
Decoroproetus spp. Pribyl 1946 trilobite
 Lichida - Odontopleuridae
Anacaenaspis sp. Bruton 1967 trilobite
Dicranurus nesiotes n. sp. trilobite
Ostracoda
  -
Ostracoda indet. Latreille 1802 ostracod
Bivalvia
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
Cephalopoda
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Graptolithina
 Graptoloida -
Monoclimacis sp. graptoloid
 Bireclinata - Monograptidae
Monograptus priodon Bronn 1835 graptoloid
unclassified
  -
Ophiuroidea
  -
Stenaster obtusus Forbes 1848 brittle star
asterozoan
Edrioasteroidea
  - Pyrgocystidae
Epipaston sp.
edrioasteroid
Stylophora
 Mitrata -
Hyolitha
  -
Hyolitha indet. Marek 1963
Brachiopoda
  -
Brachiopoda indet. Cuvier 1805
originally entered as "Brachipoda indet."
Strophomenata
 Productida - Strophochonetidae
 Strophomenida - Leptestiidae
Rhynchonellata
 Atrypida - Lissatrypidae
Anthozoa
  -
Anthozoa indet. Ehrenberg 1834