Prognathodes dichrous

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Prognathodes dichrous
ChaetodonDichrousFord.jpg
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Chaetodontidae
Genus: Prognathodes
Species:
P. dichrous
Binomial name
Prognathodes dichrous
(Günther, 1869)
Synonyms [2]

Chaetodon dichrousGünther, 1869

Prognathodes dichrous, the bicolor butterflyfish, also known as the bastard cunningfish or hedgehog butterflyfish, is a species of marine ray-finned fish, a butterflyfish belonging to the family Chaetodontidae. It is found in the South Atlantic Ocean.

Contents

Description

Prognathodes dichrous is largely brown in colour with the upper rear quarter of the body being white, including the dorsal and caudal fin The dorsal fin contains 12 spines and 19 soft rays while the anal fin has 3 spines and 15 soft rays. This species attains a maximum total length of 16 centimetres (6.3 in). [2] There is a white eye ring, too.

Distribution

Prognathodes dichrous is found in the southeastern Atlantic Ocean where it is endemic to the waters around the British Overseas Territories of Ascension and Saint Helena islands. [1]

Habitat and biology

Prognathodes dichrous is a species of deeper water, normally found between 12 and 35 metres (39 and 115 ft) but ar Hummock Point it can be seen in water as shallow as 1 metre (3.3 ft). [1] It is found in caves and under overhangs, as well as on seamounts. [2] It is normally encountered in pairs, although shoals have also been recorded, which browse on benthic invertebrates over rocky areas. [1] This is an oviparous species which spawns as pairs. [2]

Systematics

Prognathodes dichrous was first formally described in 1869 by the German-born British zoologist Albert Günther (1830–1914) with the type locality given as St Helena. [3] Its closest relative appears to be the rather similar Prognathodes obliquus which is endemic to St Paul Rocks off Brazil. [4]

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References

  1. 1 2 3 4 Rocha, L.A.; Pyle, R. (2010). "Prognathodes dichrous". IUCN Red List of Threatened Species . 2010: e.T165690A6093109. doi: 10.2305/IUCN.UK.2010-4.RLTS.T165690A6093109.en . Retrieved 19 November 2021.
  2. 1 2 3 4 Froese, Rainer and Pauly, Daniel, eds. (2019). "Prognathodes dichrous" in FishBase. December 2019 version.
  3. ↑ Eschmeyer, William N.; Fricke, Ron & van der Laan, Richard (eds.). "Species in the genus Chaetodon". Catalog of Fishes . California Academy of Sciences . Retrieved 31 December 2020.
  4. ↑ Lemon Tyk (10 February 2012). "Prognathodes obliquus and P. dichrous are two similar yet unobtainable species from the Atlantic". Reedbuilders.com. Retrieved 4 January 2021.
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