Where: Nelson, New Zealand (41.0° S, 173.0° E: paleocoordinates 41.0° S, 173.0° E)
• outcrop-level geographic resolution
When: Lejopyge laevigata trilobite zone, Tasman Formation, Boomerangian (500.5 - 499.0 Ma)
• The limestone lense is approximately 10 meters thick and has presence of numerous trilobite exuviae. The Tuarangia paparua are most readily collected four to five meters above the base of the limestone lense.
•
•Originally given a minimum age of Merioneth. However, Mackinnon (1985) gives the age as late Middle Cambrian, and it is placed within the Boomerangian of the Australian scale. That correlates with Menevian (PJW).
•
•“Their correlations suggest an age for Trilobite Rock that is within the range of the Ptychagnostus cassis Subzone of the Leiopyge laevigata Zone (i.e., toward the upper limit of the Bolaspidella Zone of North America).”
• bed-level stratigraphic resolution
Environment/lithology: lithified limestone
Size classes: mesofossils, microfossils
Preservation: cast, replaced with phosphate
Collection methods: chemical,
• The specimens are preserved as black phosphatic steinkerns.
Primary reference: R. A. Henderson and D.I. MacKinnon. 1981. New Cambrian inarticulate Brachiopoda from Australasia and the age of the Tasman Formation. Alcheringa 5(3/4):289-309 [P. Wagner/P. Wagner/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 7897: authorized by Mark Patzkowsky, entered by Phil Borkow on 06.06.2000, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
•
•Henderson & Mackinnon (1981: Alcheringa) give the inarticulate brachiopods.
unclassified | |
Porifera indet.1 Grant 1836 | |
Deuteropoda | |
| |
Lingulata | |
Paterinata | |
Rostroconchia | |
Tuarangia paparua n. gen. n. sp.1
Tuarangia paparua n. gen. n. sp.1 MacKinnon 1982 | |
Helcionelloida | |
Protowenella cobbensis n. sp.2, Helcionella sp.2, Anabarella simesi n. sp.2, Latouchella cf. orientalis2, Latouchella cf. accordionata2, Obtusoconus foliaceus n. sp.2
Protowenella cobbensis n. sp.2 MacKinnon 1985
Helcionella sp.2 Grabau and Shimer 1909
Anabarella simesi n. sp.2 MacKinnon 1985
Latouchella cf. orientalis2 Walcott 1905
Latouchella cf. accordionata2 Runnegar and Jell 1976
Obtusoconus foliaceus n. sp.2 MacKinnon 1985 | |
Enigmaconus parvus n. gen. n. sp.2
Enigmaconus parvus n. gen. n. sp.2 MacKinnon 1985 | |
Costipelagiella cf. zazvorkai2 Horný 1964 | |
Eurekapegma cooperi n. gen. n. sp.2
Eurekapegma cooperi n. gen. n. sp.2 MacKinnon 1985 | |
unclassified | |
Echinodermata indet.1 Klein 1754 |