Ranft Mudstone, Inangahua & Waitahu Outliers, Reefton area, New Zealand (Devonian of New Zealand)

Where: New Zealand (42.1° S, 171.9° E: paleocoordinates 23.1° S, 178.8° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Ranft Mudstone Formation, Emsian (407.6 - 393.3 Ma)

• Reefton Group is not very well dated, as there are few correlatable fossils.

• formation-level stratigraphic resolution

Environment/lithology: marine; gray, blue mudstone and calcareous siltstone

• "Low energy, muddy shelf, with shallowing near the top of the formation."
• "100+ m. Massive, dark blue-grey mudstone with thin fossil bands and sparite-rich siltstone layers. Grades up into limestone through a quartzose sandstone unit."

Primary reference: M. A. Bradshaw. 1999. Lower Devonian bivalves from the Reefton Group, New Zealand. Memoirs of the Association of Australasian Palaeontologists 20:1-171 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 40527: authorized by Michael Foote, entered by Michael Foote on 24.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Homalonotidae
Burmeisteria sp.2 Salter 1865 trilobite
 Proetida - Proetidae
Dechenella sp.2 Kayser 1880 trilobite
Bivalvia
 Ostreida - Pterineidae
Actinopteria sp.2 Hall 1884 oyster
 Nuculida - Nuculidae
Nuculoidea sp.2 Williams and Berger 1916 nut clam
 Protobranchia - Nuculanidae
Phestia sp.2 Chernyshev 1951 pointed nut clam
Cephalopoda
 Nautiloidea -
Nautiloidea indet.2 Agassiz 1847 nautiloid
orthocones
Stylophora
 Mitrata -
Crinoidea
  -
Crinoidea indet.2 Miller 1821 Sea lily
 Camerata - Batocrinidae
 Monobathrida - Hexacrinitidae
Hexacrinites sp.1 Austin and Austin 1843 Sea lily
Strophomenata
 Productida - Chonetidae
Chonetes sp.2 Fischer de Waldheim 1830
Rhynchonellata
 Terebratulida - Meganterididae