Chevron Blenny, Omobranchus elongatus (Peters 1855)


Other Names: Chevroned Blenny, Cloister Blenny

A Chevron Blenny, Omobranchus elongatus, at Pulau Subar Laut, Singapore, February 2017. Source: budak / Flickr. License: CC by Attribution-NonCommercial-NoDerivatives

Summary:
A greyish to reddish-grey oysterblenny with a white diagonal line behind the eye, a pale-rimmed brown to dark brown spot on the rear of the gill cover, and irregular dark brown bars or blotches along the side separated by narrow curved white lines. Males have a dusky spot on the middle of the soft dorsal fin.
The Chevron Blenny has no fleshy bladelike crest on the top of the head in either sex.

Cite this page as:
Bray, D.J. 2022, Omobranchus elongatus in Fishes of Australia, accessed 29 May 2024, https://fishesofaustralia.net.au/Home/species/4743

Chevron Blenny, Omobranchus elongatus (Peters 1855)

More Info


Distribution

Gulf of Carpentaria to at least the Whitsunday Islands, Queensland. Elsewhere the species is widespread in the Indo-west Pacific
Inhabits shallow nearshore reefs with oyster growth and little coral cover, often in estuaries and tidepools.

Features

Dorsal fin XII-XIV, 17-20; Anal fin II, 20-23, both anal-fin spines of males discernible externally; Pectoral fin 13; Pelvic fin I, 2; Caudal fin (segmented rays) 12-14; Procurrent caudal rays (dorsal + ventral) 10-16; Vertebrae 10-11 + 27- 30 = 37-40; Lateral-line tubes 0-9.
Body elongate; no cirri, tentacles or fleshy blade-like crest on top of head in either sex; both jaws with a single canine tooth posteriorly; lips with a smooth edge, lower lip with a small ventral projecting flap posteriorly. Prenasal pores present; interorbital pores 1-4; circumorbital pores 7-9.All caudal-fin rays unbranched.

Colour

Body greyish to reddish-grey, with irregular curved oblique greyish bars along the side separated by narrow curved white lines; a pale-edged brown to reddish-brown spot on the rear of the gill cover; small dark spots sometimes on the underside of the head and chest; males with a dusky spot on the soft dorsal fin between rays 9-13.

Etymology

The specific name is from the Latin elongatus (= to prolong), possibly in reference to the more elongate body of this species compared with other species known at the time.

Species Citation

Petroscirtes elongatus Peters 1855, Monatsberichte der Königlichen Preussischen Akademie der Wissenschaften zu Berlin 1855: 440. Type locality: Mozambique.

Author

Bray, D.J. 2022

Resources

Atlas of Living Australia

Chevron Blenny, Omobranchus elongatus (Peters 1855)

References


Allen, G.R. & Erdmann, M.V. 2012. Reef fishes of the East Indies. Perth : Tropical Reef Research 3 vols, 1260 pp.

Blaber, S.J.M., Young, J.W. & Dunning, M.C. 1985. Community structure and zoogeographic affinities of the coastal fishes of the Dampier region of north-western Australia. Australian Journal of Marine and Freshwater Research 36: 247-266, https://doi.org/10.1071/MF9850247

Gibbs, S., Hundt, P., Nelson, A., Egan, J., Tongnunui, P. & Simons, A. 2018. Systematics of the combtooth blenny clade Omobranchus (Blenniidae: Omobranchini), with notes on early life history stages. Zootaxa 4369(2): 270-280. https://doi.org/10.11646/zootaxa.4369.2.7

Hastings, P.A. & Springer, V.G. 2009. Systematics of the Blenniidae (combtooth blennies).pp. 69–91 in Patzner, R.A., Gonçalves, E.J. & Kapoor, B.G. (eds) The Biology of Blennies. Enfield, New Hampshire: Science Publishers,  https://doi.org/10.1201/b10301-5

Hundt, P.. Iglésias, S., Hoey, A. & Simons, A. 2013. A multilocus molecular phylogeny of combtooth blennies (Percomorpha: Blennioidei: Blenniidae): Multiple invasions of intertidal habitats. Molecular phylogenetics and evolution 70: 47-56. https://doi.org/10.1016/j.ympev.2013.09.001

Hundt, P. & Simons, A. 2018. Extreme dentition does not prevent diet and tooth diversification within combtooth blennies (Ovalentaria: Blenniidae). Evolution 72(4): 930-943. https://doi.org/10.1111/evo.13453

Munro, I.S.R. 1967. The Fishes of New Guinea. Port Moresby : Dept. Agric. Stock Fish. 651 pp. 23 figs 84 pls. 

Peters, W.C.H. 1855. Übersicht der in Mossambique beobachteten Seefische. Monatsberichte der Königlichen Preussischen Akademie der Wissenschaften zu Berlin 1855: 428-466 

Peters, W. 1855. Uebersicht der in Mossambique beobachteten Fische. Archiv für Naturgeschichte 21(2-3): 234-282. See ref at BHL

Springer, V.G. 1972. Synopsis of the tribe Omobranchini with descriptions of three new genera and two new species (Pisces : Blenniidae). Smithsonian Contributions to Zoology 130: 1-31 figs 1-16 https://doi.org/10.5479/si.00810282.130

Springer, V.G. 1986. Family No. 235: Blenniidae. pp. 742-755 in Smith, M.M. & Heemstra, P.C. (eds). Smith's Sea Fishes. Johannesburg : Macmillan South Africa xx + 1047 pp. 144 pls.

Springer, V.G. & Gomon, M.F. 1975. Revision of the blenniid fish genus Omobranchus with descriptions of three new species and notes on other species of the tribe Omobranchini. Smithsonian Contributions to Zoology 177: 1-135 figs 1-52 https://doi.org/10.5479/si.00810282.177

Springer, V.G. 1981. Notes on blenniid fishes of the tribe Omobranchini, with descriptions of two new species. Proceedings of the Biological Society of Washington 94(3): 699-707. See ref at BHL

Whitley, G.P. 1964. A survey of Australian Ichthyology. Proceedings of the Linnean Society of New South Wales 89(1): 11-127 (as Graviceps (Pauloscirtes) elongatus)

Williams, J.T. 2014. Omobranchus elongatus. The IUCN Red List of Threatened Species 2014: e.T48342312A48360372. https://dx.doi.org/10.2305/IUCN.UK.2014-3.RLTS.T48342312A48360372.en. Downloaded on 06 April 2020.

Quick Facts


CAAB Code:37408059

Conservation:IUCN Least Concern

Depth:0-4 m

Habitat:Reef associated, estuaries, tidepools

Max Size:5 cm SL

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