Eastern Tadpole Coffinfish, Chaunacops spinosus Ho & McGrouther 2015


Paratype of the Eastern Tadpole Coffinfish, Chaunacops spinosus, from the Lord Howe Rise in the Western Tasman Sea - AMS I.29339-007. Source: Rohan Pethiyagoda / Australian Museum. License: CC BY Attribution

Summary:
A translucent greyish tadpole-like coffin fish densely covered in fine spinules, with a short slender illicium ("fishing rod") tipped with a cluster of short cirri (esca or 'bait"). The head, belly and most of gill openings are dark bluish, and the inner gill chamber, gill membranes and gill arches are black.

Cite this page as:
Dianne J. Bray, Chaunacops spinosus in Fishes of Australia, accessed 27 Jan 2020, http://136.154.202.208/home/species/5166

Eastern Tadpole Coffinfish, Chaunacops spinosus Ho & McGrouther 2015

More Info


Distribution

Recorded in the Australian EEZ from off the Shoalhaven Bight, New South Wales, and on the Lord Howe Rise in the Tasman Sea. The species has also been recorded from the Coral Sea between Australia and New Caledonia.

Features

Dorsal fin 11 (all rays simple); Pectoral fin 12-14 (all rays simple); Anal fin 6, all rays simple; Caudal fin 9 (inner 6 rays branched, lower-most ray shorter than half length of neighbouring ray).
Gill rakers: on first gill arch 13-17; on second gill arch 11-13; on third gill arch 12-13; Gill rakers on fourth gill arch 9-10. 
Gill filaments: on second gill arch 27-31; on third gill arch 29-32; on fourth gill arch 39-41.
Lateral-line neuromasts complex, large and obvious, forming network on head and body: on supraorbital 9-10; on premaxilla 7; on upper preopercular 1; on infraorbital 5-7; on lower preopercular 2; on upper mental 7-8; on lower mental 2; on mandibular 3-5; on anteriorlateral-line proper 3; on supratemporal 6; neuromasts on body proper 23-26, including one on base of caudal-fin. 

Body tadpole-like, globular anteriorly, tapering posteriorly. Dorsal profile ele-vated gradually from upper jaw to posterior skull region, then descends rapidly to caudal peduncle, then rises to tip of caudal-fin. Eyes small, covered by a clear, rounded window of skin. Mouth terminal, opening upturned, almost vertical; lower jaw protruding anterior to upper jaw; rear of upper jaw extends slightly beyond anterior margin of eye. Lower part of maxilla narrow, not expanded to wider than the remaining parts. Illicium short, slender; esca a cluster of short cirri.

Similar Species

Differs from the other species of Chaunacops in fine dermal spinules mixed with simple and bifurcate spinules covering the body, and four pectoral lateral-line neuromasts. Also, the following combination of characteristics: buccal cavity greyish, semi-transparent skin and a relatively short tail (tail length 1 = 31⋅8–34⋅8% LS, tail length 2 = 15⋅7–16⋅3% LS, tail length 3 = 15⋅0–18⋅6% LS).

Etymology

The specific name spinosus means 'spiny', in reference to the dense body covering of fine spinules.

Species Citation

Chaunacops spinosus Ho & McGrouther 2015, Journal of Fish Biology,doi: 10.1111/jfb.12607: 3, Figs 1-2. Type locality: off Shoalhaven, New South Wales, eastern Australia, western Tasman Sea, 1115 m, 34º56′S; 151º15′E.

Author

Dianne J. Bray

Eastern Tadpole Coffinfish, Chaunacops spinosus Ho & McGrouther 2015

References


Ho, H.-C. & McGrouther, M. 2015. A new anglerfish from eastern Australia and New Caledonia (Lophiiformes: Chaunacidae: Chaunacops), with new data and submersible observation of Chaunacops melanostomus. Journal of Fish Biology 86(3): 940-951. Abstract

Quick Facts


Depth:to 1423 m

Habitat:Benthopelagic

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