MEMOIRS OF THE QUEENSLAND MUSEUM, Vol. XII, Part III. 
THE CAMBRIAN FAUNAS OF NORTH- 
AUSTRAFIA. 
PART 5. THE TRILOBITE GENUS DORYPYGE. 
By F. W. Whitehouse, Ph.D., D.Sc. 
(Major R.A.E.). 
(Plate XI.) 
EXPLANATION. 
In Part 3 of this series of papers the polymerid trilobites that had been 
collected to that date (1939) were described. Since then, as noted in Part 4, 
very many more trilobites and other fossils have been collected from a series 
of beds ranging through most of the Middle Cambrian. These beds are exposed 
in the dissected hilly country east and north-east of Camooweal. Not only 
did this field excursion bring to light such new and very rich faunas, but for 
the first time a measured thickness of the beds was followed systematically and 
a zonal collection made. Previously all fossils had been gathered from widely 
separated localities, mainly from outcrops of flat beds appearing through the 
alluvium. The zonal nomenclature that was adopted in the earlier papers, 
therefore, was based purely on palaeontological evidence. Now, with a measured 
section as a basis, a direct zonal grouping is possible. 
Systematic description of the zonal trilobite faunas (Miomera and 
Polymera) had begun before the outbreak of war. After my enlistment this 
had to be discontinued. At that time some of the plates had been prepared and 
some of the text written. But the only section that was complete, with text, 
text-figures and plates ready, was this small section on the trilobite genus 
Dorypyge. During a brief period of military leave this isolated fragment has 
been sent to the press in advance of the main body of the work which must wait 
until later. 
THE HORIZON OF THE DORYPYGE BEDS. 
The genus Dorypyge is a new record for the Cambrian of Australia. 
When Part 3 was published the genera Amphoton and Nepea had been found 
(in association) at one locality only; and a zonal stage ( Amphoton Stage) had 
been suggested for them. The subsequent collecting has shown that these two 
genera range through a considerable portion of the Middle Cambrian. 
A lithological vertical section of the local Middle Cambrian limestones 
exposed along the Camooweal-Burketown road has been published (Whitehouse, 
1940, p. 45), and the ranges of some of the trilobite genera indicated. Reference 
should be made to that for details. The sequence begins (in the late lower 
Cambrian) with limestones without trilobites. Then Redlichia appears, followed 
by Xystridura and other forms, these two genera overlapping for two feet 
in the section. Just as Xystridura dies out, about the end of the first third of 
the section, Nepea and Amphoton appear and range through the rest of the 
observed fossiliferous section. Half way through the range of these two genera 
the Papyriaspis-Asthenopsis fauna makes its appearance; and the species of 
Dorypyge have been collected in the beds containing all four genera towards 
the end of this faunal stage, 
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