Smooth Swallower, Dysalotus oligoscolus Johnson & Cohen 1974

Other Names: Spinytail Swallower

A Smooth Swallower, Dysalotus oligoscolus. Source: Australian National Fish Collection, CSIRO. License: CC BY Attribution-Noncommercial

Summary:

A distinct swallower with vomerine teeth, and only a single row of emergent prickles above and below the lateral line - characters that are unique amongst all chiasmodontids (Melo 2016).

Cite this page as:

Bray, D.J., Dysalotus oligoscolus in Fishes of Australia, accessed 05 Oct 2024, https://fishesofaustralia.net.au/Home/species/2577

Smooth Swallower, Dysalotus oligoscolus Johnson & Cohen 1974

More Info

Distribution	Off Sydney, New South Wales, to the Cascade Plateau, Tasmania. Elsewhere, the species is widespread in the Atlantic, Pacific and Indian Oceans, more frequently in high latitudes. The species is bathypelagic, at depths of 1500-4835 m.
Similar Species	Differs from Dysalotus alcocki in having vomerine teeth in one to three rows, and a single row of emergent prickles above and below the posterior half of the lateral line (may also have prickles buried in the skin) vs. vomerine teeth absent, and three to five rows of emergent prickles above and below the posterior half of the lateral line in D. alcocki.
Author	Bray, D.J.

Smooth Swallower, Dysalotus oligoscolus Johnson & Cohen 1974

References

Ban, K. & Fukui, A. 2012. First Japanese records of a deep-sea chiasmodontid fish, Dysalotus oligoscolus. Japanese Journal of Ichthyology 59(1): 45-48. [In Japanese, English abstract.]

Johnson, R.K. & Cohen, D.M. 1974. Results of the research cruises of FRV "Walther Herwig" to South America. XXX. Revision of the chiasmodontid fish genera Dysalotus and Kali, with descriptions of two new species. Archiv für Fischereiwissenschaft 25(1/2): 13-46.

Melo, M.R.S. 2016. A review of the genus Dysalotus (Percomorphacea: Chiasmodontidae), with the description of Dysalotus pouliulii sp. nov. Journal of Fish Biology 1-17. Online early DOI: 10.1111/jfb.13194 Abstract