Abstract

A taxonomic revision of Australian leaioid faunas has reduced, by synonymy, the known Early Carboniferous taxa to three species viz., Hemicycloleaia andersonae (Tasch, 1979), H. grantrangicus (Tasch, 1979) and Rostroleaia carboniferae (Tasch, 1979); and the known Late Permian taxa to three species viz., Hemicycloleaia mitchelli (Etheridge, 1892), H. discoidea (Mitchell, 1925), and H. deflectomarginis (Tasch, 1979). The revision establishes a consistent taxonomic nomenclature to facilitate comparisons with extra-Australian leaiid species, and their correlations. Particular attention is paid to the correlation of the Late Permian leaioid and estheriid faunas of the Newcastle Coal Measures (NCM) of the Sydney Basin, with those of the Lebedevian of the Lower Tungus and Nordvik Basins, northern Siberia, which in turn, indicate a correlation (Lozovsky, 1998) with the Late Tatarian Vjatian (Luptug member) horizon of the Russian Platform. We speculate that the conchostracans may have lived in estuaries and ephemeral relict water bodies along a coastal plain, and that their eggs were dispersed either by wind, by minor marine incursions, or by both of these processes. Such marginal marine influences could partly explain the widespread distribution of Mitchell's Late Permian (Tatarian) conchostracan species.

 
Download Complete Work

Bibliographic Data

Short Form
Jones and Chen, 2000, Rec. Aust. Mus. 52(2): 223–244
Author
P. J. Jones; Pei-ji Chen
Year
2000
Title
Carboniferous and Permian Leaioidea (Branchiopoda: Conchostraca) from Australia: taxonomic revision and biostratigraphic implications
Serial Title
Records of the Australian Museum
Volume
52
Issue
2
Start Page
223
End Page
244
DOI
10.3853/j.0067-1975.52.2000.1315
Language
English
Date Published
29 November 2000
Cover Date
29 November 2000
ISSN
0067-1975
CODEN
RAUMAJ
Publisher
The Australian Museum
Place Published
Sydney, Australia
Digitized
29 November 2000
Available Online
29 November 2000
Reference Number
1315
EndNote
/Uploads/Journals/17895/1315.enw
Title Page
/Uploads/Journals/17895/1315.pdf
File size: 8kB
Complete Work
/Uploads/Journals/17895/1315_complete.pdf
File size: 826kB