Affinities,origin and adaptive features of the Australian Desert Goby Chlamydogobius eremius (Zietz, 1896) (Teleostei: Gobiidae)

The Desert Goby Chlamydogobius eremius (Zietz, 1896) is a gobiid teleost fish endemic to the Central Australian Basin, occurring mostly in artesian springs. Generic features for Chlamydogobius Whitley are supplied with emphasis on the modified head lateral-line system and on osteology. Comparisons with other Indo-Pacific genera suggest closest affinity with Mugilogobius Smitt, within a monophyletic grouping which also includes Weberogobius Koumans, Redigobius Herre, Pseudogobius Aurich, Brachygobius Bleeker, Hemigobius Bleeker, and Pandaka Herre. The origin of Ch. eremius is considered in the light of the Tertiary and Quaternary climatic history of the Central Australian Basin. The adaptiveness of certain morphological and life-history features found in Ch. eremius, such as elongate gut, black peritoneum, short pelvic disc, and large egg-size, is also discussed in relation to present habitat.