''Prognathodes carlhubbsi'', the southern scythemarked butterflyfish or southern scythe butterflyfish, is a species of

butterflyfish The butterflyfish are a group of conspicuous tropical marine fish of the family Chaetodontidae; the bannerfish and coralfish are also included in this group. The approximately 129 species in 12 genera are found mostly on the reefs of the Atlant ...

found at rocky reefs in the tropical Eastern Pacific, where found at depths of at the

Galápagos Islands The Galápagos Islands (Spanish: , , ) are an archipelago of volcanic islands. They are distributed on each side of the equator in the Pacific Ocean, surrounding the centre of the Western Hemisphere, and are part of the Republic of Ecuador ...

Cocos Island Cocos Island ( es, Isla del Coco) is an island in the Pacific Ocean administered by Costa Rica, approximately southwest of the Costa Rican mainland. It constitutes the 11th of the 13 districts of Puntarenas Canton of the Province of Puntarenas ...

, Malpelo Island, and off northwestern

Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = Seal (emblem), National seal , national_motto = "Fi ...

.Hooker, Y. (2009).
Nuevos registros de peces costeros tropicales para el Perú.
' Rev. Peru. Biol. 16(1): 033-041. Until ''P. carlhubbsi'' was described as a separate species in 1995, populations in these regions were included in '' P. falcifer''. When separated, the true ''P. falcifer'' is restricted to more northernly regions (off

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

and

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

), and it has whitish-grey (not clear yellow) belly and flanks, the black line through the eye is paler and less distinct, and the angle of the inverted black "V" on the side is shallower.Adams, J. (2009).
Prognathodes carlhubbsi: will the real scythe butterflyfish please swim up?
' Reef Builders. Accessed 24 May 2011.

Etymology

Its specific name honors the American

ichthyologist Ichthyology is the branch of zoology devoted to the study of fish, including bony fish ( Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 33,400 species of fish had been described as of Octobe ...

Carl L. Hubbs Carl Leavitt Hubbs (October 19, 1894 – June 30, 1979) was an American ichthyologist. Biography Youth He was born in Williams, Arizona. He was the son of Charles Leavitt and Elizabeth (née Goss) Hubbs. His father had a wide variety of jobs (f ...

(1894-1979), who had been intending to

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this species when he died and who in 1958 he was the co-describer of the related Northern scythemarked butterflyfish ''

Prognathodes falcifer ''Prognathodes falcifer'', the northern scythemarked butterflyfish or northern scythe butterflyfish, is a species of butterflyfish found at rocky reefs in the tropical Eastern Pacific, where found at depths of off southern California ( La Jolla ...

''.

References

carlhubbsi Fish described in 1995 Taxa named by Teodor T. Nalbant {{Chaetodontidae-stub