Kimberley Mogurnda, Mogurnda oligolepis Allen & Jenkins 1999


Other Names: False-spotted Gudgeon

Kimberley Mogurnda, Mogurnda oligolepis. Source: Gerald R. Allen. License: All rights reserved

Summary:
A very small gudgeon found only in the Kimberley Region of north Western Australia.

Cite this page as:
Martin F. Gomon, Mogurnda oligolepis in Fishes of Australia, accessed 15 Jul 2020, http://136.154.202.208/home/species/1175

Kimberley Mogurnda, Mogurnda oligolepis Allen & Jenkins 1999

More Info


Distribution

Known only from the  Keightly River system (123º59'E) to the Berkley River system (127º13'E), in the Kimberley District, WA; inhabits freshwater rivers, creeks and billabongs in clear, rocky pools; most abundant among aquatic vegetation in less than 2-3 m.

Features

Meristic features: Dorsal fin VII-VIII + I, 9-12; Anal fin I, 9-12; Caudal fin (segmented rays) 13-15; (branched rays) 13-15; Pectoral fin 14-16; Pelvic fin I, 5; Transverse scales 11-13; Gill rakers 2 + 8 =10; Vertebrae 13-15 + 15-17 = 29-31.
Body elongate, laterally compressed, more strongly posteriorly; depth 3.6-4.7 in SL; caudal peduncle relatively elongate. Head more or less pointed with straight to slightly convex snout; nape moderately arched; length 2.6-3.1 in SL. Eye diameter 12.08-15.4 in SL. Lower jaw protruding, mouth oblique, reaching to anterior edge of pupil; jaws with villiform, posteriorly curved teeth, in dense bands, outer row enlarged; palate without teeth. Gill opening extending nearly to below rear margin of eye. Sensory pores absent on head, but well developed system of papillae arranged in multiserial bands. Sexual dimorphism generally inconspicuous.
Head and body covered with scales, except lips, snout tip, preorbital region, lower jaw, and chin; those on head, predorsal region, breast, uppermost part of back and bases of caudal and pectoral fins cycloid, remainder finely ctenoid; lateral line absent; scales in lateral series 31-37; predorsal scales 16-20.
Two dorsal fins, first rounded and lower than second, with slender, flexible spines; second dorsal and anal fins similar and opposite. Pectoral fin rounded. Pelvic fins separate, pointed. Caudal fin rounded.

Size

To at least 8 cm SL.

Colour

Dark brown on back and top of head, tan or whitish to pale mauve ventrally; head with three distinct red, diagonal stripes including a pair from lower edge of eye to lower rear edge of operculum, and third across middle of operculum through middle of pectoral fin base; also short, upward deflected, red stripe from upper rear corner of eye; middle of sides with series of about 11 large, rectangular red blotches between bases of pectoral and caudal fins; spaces between red blotches bluish-white; additional, smaller red spots scattered on body, especially on side of nape and above belly. Dorsal fins semi-translucent to slightly dusky brown with relatively broad yellow outer margin, 3-4 large red spots along base of second dorsal and several smaller red spots medially on first and second dorsal fins; anal fin semi-translucent with yellow-brown tinge, its outer margin narrowly white and basal portion broadly white superimposed with 4-5 red spots; caudal fin semi-translucent with yellow-brown tinge and red spotting, spots larger and concentrated medially and basally; pectoral and pelvic fins semitranslucent to slightly dusky brown.

Feeding

Likely to feed on small crustaceans and other invertebrates.

Biology

Oviparous, benthic spawners.

Etymology

Species name oligolepis from the Greek for ‘few-scales’ in reference to its low lateral scale count, a feature distinguishing it from M. mogurnda also in the area.

Species Citation

Mogurnda oligolepis  Allen, G.R. & Jenkins, A.P. (1999). A review of the Australian freshwater gudgeons, genus Mogurnda (Eleotridae) with descriptions of three new species.  Aqua, J. Ichthyol. Aquat. Biol. 3(4): 141–155 [151, fig. 9].
Mogurnda Creek, Drysdale River system, Drysdale River National Park, WA.

Author

Martin F. Gomon

Kimberley Mogurnda, Mogurnda oligolepis Allen & Jenkins 1999

References


Allen, G.R. (1982). Inland Fishes of Western Australia.  Perth : Western Australian Museum 86 pp. 6 figs 20 pls [59] (as M. species).

Allen, G.R. & Jenkins, A.P. (1999). A review of the Australian freshwater gudgeons, genus Mogurnda (Eleotridae) with descriptions of three new species.  Aqua, J. Ichthyol. Aquat. Biol. 3(4): 141–155

Allen, G.R., Midgley, S.H. & Allen, M. (2002). Field Guide to the Freshwater Fishes of Australia.  Perth : Western Australian Museum 394 pp.

Quick Facts


CAAB Code:37429056

Habitat:Freshwater

Max Size:8 cm SL

Native:Endemic

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