Oneline Clingfish, Discotrema monogrammum Craig & Randall 2008


A Oneline Clingfish, Discotrema monogrammum, on a crinoid, at Sekotong, Lombok, Indonesia. Source: Dave Harasti / http://www.daveharasti.com/. License: All rights reserved

Summary:

A tiny brownish, red, black or yellow clingfish with a broad white to yellow stripe from the snout to the middle of the caudal fin. The Onestripe Clingfish is commensal on crinoids.


Cite this page as:
Bray, D.J. 2018, Discotrema monogrammum in Fishes of Australia, accessed 20 Nov 2018, http://fishesofaustralia.net.au/home/species/4820

Oneline Clingfish, Discotrema monogrammum Craig & Randall 2008

More Info


Distribution

Great Barrier Reef, Queensland & Christmas Island in the Indian Ocean. As this species has previously been mis-identified as Discotrema crinophila, it may be more widespread in Australian waters. Elsewhere the species occurs in Indonesia, Papua New Guinea, the Philippines and Timor-Leste. The species is commensal on crinoids, especially on Comanthus bennetti.

Features

Dorsal-fin rays 8-9; Anal-fin rays 6-7; Pectoral-fin rays 23-25; Caudal-fin rays 12-15; Gill rakers 5-7 (slender); Vertebrae 33-34.

Body slender, head broad, somewhat depressed, interorbital narrow; snout short, mouth small, upper jaw not reaching front of eye; teeth incisiform with rounded tips, in a single row in jaws; anus closer to anal-fin origin than to posterior margin of sucking disc.

Disc large, slightly longer than wide, with a deep pit just behind middle of disc.

Dorsal and anal fins far back on body, dorsal-fin origin slightly in advance of anal-fin origin. Caudal fin rounded.

Colour

Colour variable to resemble the host crinoid - yellowish to brownish, red, dark brown or black, with a pale yellow to whitish stripe.

Similar Species

Differs from Dicotrema crinophilum in having a single continuous pale yellow to white stripe on side of head and body (vs a mid-dorsal white to pale yellow stripe in addition to the lateral body stripe in D. crinophilum), 23-25 pectoral-fin rays (vs 25-28 rays) and 33-34 vertebrae (vs 35 vertebrae).

Etymology

Discotrema is from the Greek diskos, meaning 'disc shape', and trema , meaning 'hole'. The species name monogrammum is from the Greek mono meaning 'one' and gramme meaning 'line,' in reference to diagnostic single pale yellow to white stripe.

Species Citation

Discotrema monogrammum, Craig & Randall 2008, Copeia 2008(1): 70, Fig. 1. Type locality: Kimbe Bay, patch reef, New Britain, Papua New Guinea, depth 4 metres (from a crinoid).

Author

Bray, D.J. 2018

Resources

Australian Faunal Directory

Oneline Clingfish, Discotrema monogrammum Craig & Randall 2008

References


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

Allen, G.R. & Steene, R.C. 1988. Fishes of Christmas Island Indian Ocean. Christmas Island : Christmas Island Natural History Association 197 pp. (as Discotrema echinocephala)

Allen, G.R., Steene, R.C. & Orchard, M. 2007. Fishes of Christmas Island. Christmas Island : Christmas Island Natural History Association 2 edn, 284 pp. (as Discotrema crinophila)

Carpenter, K.E. & Smith-Vaniz, W.F. 2016. Discotrema monogrammum. The IUCN Red List of Threatened Species 2016: e.T67905414A79800486. http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T67905414A79800486.en. Downloaded on 15 April 2017.

Craig, M.T. & J.R. Randall. 2008. Two new species of the Indo-Pacific clingfish genus Discotrema (Gobiesocidae). Copeia 2008(1): 68-74.

Kuiter, R.H. & Debelius, H. 1994. Southeast Asia tropical fish guide. IKAN-Unterwasserarchiv, Frankfurt, Germany. 321 p. (as Discotrema echinocephala)

Randall, J.E., Allen, G.R. & Steene, R. 1990. Fishes of the Great Barrier Reef and Coral Sea. Bathurst : Crawford House Press 507 pp. figs. (image p. 56 is Discotrema crinophila)

Randall, J.E., G.R. Allen & R.C. Steene. 1997. Fishes of the Great Barrier Reef and Coral Sea. 2nd Ed. Crawford House Publishing Pty Ltd. Bathurst, NSW, Australia. 557 pp. (as Discotrema sp.)

Carpenter, K.E. & Smith-Vaniz, W.F. 2016. Discotrema monogrammum (errata version published in 2017). The IUCN Red List of Threatened Species 2016: e.T67905414A115448073. http://dx.doi.org/10.2305/IUCN.UK.2016-3.RLTS.T67905414A79800486.en. Downloaded on 08 August 2018.

Quick Facts


CAAB Code:37206038

Behaviour:Commensal with crinoids

Conservation:IUCN Least Concern

Depth:4-20 m

Habitat:Reef associated

Max Size:2.6 cm TL

Species Image Gallery

Species Maps

CAAB distribution map