2 
Records of the Australian Museum (2009) Vol. 61 
Fig. 1. Localities and geological maps of the studied area. (A), map of Australia showing location of the Canning Basin; ( B ), map of the 
Canning Basin; and (C), map of the Emanuel Creek area showing location of section WCB705 along Emanuel Creek (modified from 
Nicollet al., 1993). 
Conodonts are abundant, diverse, and well-preserved in 
the Early Ordovician Emanuel Formation of the Canning 
Basin in Western Australia. In the nearly sixty years since 
the discovery of the fauna (Guppy & Opik, 1950), this rich 
fauna has formed the subject of several important studies, 
particularly on the prioniodontids by McTavish (1973) and 
by Nicoll & Ethington (2004), rhipidognathids by Zhen 
et al. (2001), Jumudontus brevis by Nicoll (1992), and 
Stiptognathus borealis (Repetski, 1982) by Ethington et al. 
(2000). As documentation of the entire fauna represented by 
a huge collection recovered from several measured sections 
and subsurface core material is still in progress, the current 
contribution focuses only on Serratognathus bilobatus Lee, 
1970 and the associated fauna recovered from three samples 
of the Emanuel Formation. 
The discovery of S. bilobatus in the Emanuel Formation, 
which was deposited in relatively deep water, mid-outer 
shelf settings, provides crucial new biostratigraphic data to 
more precisely date and correlate the Serratognathus faunas 
widely distributed in eastern Gondwana and adjacent Peri- 
