Dalhousie hardyhead
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The Dalhousie hardyhead (Craterocephalus dalhousiensis) is a species of silverside in the family Atherinidae.[1] It is endemic to the warm waters of Dalhousie Springs in the Lake Eyre basin, Australia, along with the similar Craterocephalus gloveri.[2] It inhabits shady areas in tropical freshwater streams at 20-39 °C, but has been recorded at 41.8 °C. Its food consists of gastropods, aquatic plants, green filamentous algae, detritus and small invertebrates; food is mainly taken from the substrate.[3]
The species is generally golden brown with a darker brown back. A dark midlateral band runs from the snout to the base of the caudal fin. Two to three rows of pigmented scales form discontinuous lines below the midlateral band.[4] It is the only species in the genus Craterocephalus known to be sexually dimorphic.[2] Adult males are smaller and exhibit a rounded belly compared to the flattened belly of females. Males also lack the forehead concavity exhibited by females.[4]
since July 2024[update]Template:Dated maintenance category (articles)Script error: No such module "Check for unknown parameters"., it is listed as critically endangered under the EBPC Act.[5]
References
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- ↑ Craterocephalus dalhousiensis, Species Profile and Threats Database, Department of the Environment and Heritage, Australia.
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