Philypnodon macrostomus

Philypnodon macrostomus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Gobiiformes
Family: Eleotridae
Genus: Philypnodon
Species:
P. macrostomus
Binomial name
Philypnodon macrostomus

The dwarf flathead gudgeon (Philypnodon macrostomus) is a species of sleeper goby endemic to eastern Australia.[2][3]

Taxonomy

The existence of a second smaller species related to the flathead gudgeon (Philypnodon grandiceps) had been strongly suspected since 1980. P. macrostomus was described in 2006 by Douglass Fielding Hoese and Sally Reader; the type specimen was collected in Glenreagh, New South Wales.[4] Its species name derived from the Ancient Greek makro "large" and stoma "mouth".[3] Genetic analysis of the species from the different river drainages across its range showed that populations from the Lang Lang River in Victoria had diverged much earlier and most likely represent a separate, as yet undescribed species.[5]

Description

Predominantly dark brown, the dwarf flathead gudgeon has paler brown or orange belly and reaches 5 cm (2 in) in length,[4] though more regularly is around 3.5 to 4 cm (1.4 to 1.6 in).[2] It has dark brown lips. It can be distinguished from the flathead gudgeon, which is larger, has a wider gill opening, and has vertical stripes on the sides of the belly.[4]

Distribution and habitat

The dwarf flathead gudgeon is found in estuaries and freshwater rivers from Baffle Creek in central Queensland through New South Wales and eastern Victoria to Wilsons Promontory. Inland the range extends westward along the Murray River into South Australia. In the southern parts of its range, it is more restricted to estuarine habitats, and is found further upstream in more northerly river drainages.[5]

The dwarf flathead gudgeon is commonly found alongside its larger relative,[4] and often near some form of cover such as submerged vegetation or rocks.[5]

Feeding

Carnivorous, the dwarf flathead gudgeon eats insects and minute crustaceans.[6]

Breeding

The male guards the eggs after they are laid. The dwarf flathead gudgeon is mature by one year of age, though its longevity is unknown.[5]

References

  1. ^ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Philypnodon macrostomus". Catalog of Fishes. California Academy of Sciences. Retrieved 27 July 2018.
  2. ^ a b McGrouther, Mark (14 March 2013). "Dwarf Flathead Gudgeon". Nature Culture Discover. Australian Museum. Retrieved 11 April 2015.
  3. ^ a b Froese, Rainer; Pauly, Daniel (eds.). "Philypnodon macrostomus". FishBase. January 2016 version.
  4. ^ a b c d Hoese, Douglass Fielding; Reader, Sally (2006). "Description of a new species of dwarf Philypnodon (Teleostei: Gobioidei: Eleotridae) from south-eastern Australia" (PDF). Memoirs of Museum Victoria. 63 (1): 15–19. ISSN 1447-2546. Archived from the original (PDF) on August 23, 2008.
  5. ^ a b c d Thacker, Christine E.; Unmack, Peter J.; Matsui, Lauren; Duong Phil; Huang, Eric (2008). "Phylogeography of Philypnodon species (Teleostei: Eleotridae) across south-eastern Australia: testing patterns of connectivity across drainage divides and among coastal rivers" (PDF). Biological Journal of the Linnean Society. 95: 175–92. doi:10.1111/j.1095-8312.2008.01000.x.
  6. ^ Bray, Dianne J. (2011). "Dwarf Flathead Gudgeon, Philypnodon macrostomus Hoese & Reader 2006". Fishes of Australia. Museum Victoria. Retrieved 16 April 2015.

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