Wairoa Gorge S20/f905 (Triassic of New Zealand)

Where: South Island, New Zealand (41.3° S, 173.3° E: paleocoordinates 70.6° S, 76.7° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Late/Upper Triassic (237.0 - 201.3 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; sandstone

• This taxon occurs in rich shellbeds in the Nelson region, but post-depositional deformation, mainly associated with faulting along the Nelson Regional Syncline and subsequent decalcification have resulted in very poor preservation and difficulty in collecting good material. Juvenile valves are well represented in some collections and left and right valves are present either in about equal proportions or in a ratio of about 2:1.

Size class: macrofossils

Primary reference: J. A. Grant-Mackie. 1980. Systematics of New Zealand Monotis (Upper Triassic Bivalvia): subgenus Eomonotis. New Zealand Journal of Geology and Geophysics 23:639-663 [D. Bottjer/N. Bonuso/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41678: authorized by David Bottjer, entered by Nicole Bonuso on 19.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Subgenus = Eomonotis
Bivalvia
 Pectinida - Monotidae
Monotis mokaui n. sp. scallop