JSON format icon JSON RDF format icon RDF ISO19115-3 XML

Nepeid trilobites of the Middle Cambrian of northern Australia

ARCHIVED

Created 20/01/2025

Updated 20/01/2025

JSON format icon JSON RDF format icon RDF ISO19115-3 XML

Twenty-five species of the Middle Cambrian Nepeidae of northern Australia are described; of these 10 are presented in open nomenclature, and 14 are named new. Four genera are recognized: Nepea Whitehouse and three new-Penarosa, Loxonepea, and FoIliceps. Of these Loxonepea is reminiscent of some Menomoniidae. The stratigraphic distribution is uneven; Nepea dominates in the Zone of Ptychagnostus nathorsti and Penarosa in the earlier zones. It is, however, apparent that they represent concurrent stocks. The older form to appear belongs to the Nepea stock. The currently used Middle Cambrian scale is essentially the Scandinavian agnostid scale of zones; the name Hypagnostus parvifrons Zone is, however, replaced by the name ElIagnostlls opimlls Zone. Collecting sites are described in superpositional order of strata. It appears that the nepeids lived in swarms floating most of the time in the surface waters. as inferred from the mode of embedding, from the occurrence in all kinds of sediments, the thin test, and the frontal boss-presumably a device to facilitate floating.

Files and APIs

Tags

Additional Info

Field Value
Title Nepeid trilobites of the Middle Cambrian of northern Australia
Language eng
Licence Not Specified
Landing Page https://devweb.dga.links.com.au/data/dataset/cdfdb045-0ab1-4685-b61b-cc989fe18bdc
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage http://www.ga.gov.au/place-names/PlaceDetails.jsp?submit1=GA1
Data Portal Data.gov.au