Eptatretus mccoskeri 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Myxini Myxiniformes Myxinidae

Scientific Name: Eptatretus mccoskeri McMillan, 1999

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2009-11-10
Assessor(s): Mincarone, M.M.
Reviewer(s): Polidoro, B., Knapp, L. & Carpenter, K.E.
This species may be endemic to the Galapagos Islands, where it is only known from four specimens. However, there are no known threats likely to affect this species given that it is found to 200 m depth and it present within the Galapagos Marine Protected Area. It is listed as Least Concern. However, more research is needed on this species distribution, population, biology, life history, and potential threats.

Geographic Range [top]

Range Description:This species is known only from four specimens collected southeast of San Cristobal Island, on the eastern edge of the Galápagos Archipelago (McMillan 1999).
Countries occurrence:
Ecuador (Galápagos)
FAO Marine Fishing Areas:
Pacific – southeast
Additional data:
Lower depth limit (metres):201
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population information for this species is only known from four specimens.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:The only known specimens were taken from a minnow trap set on sand bottom at the top of a seamount at about 201 m depth. This is an insular, endemic species (McMillan 1999). The copulatory organ is absent in this species. The gonads of hagfishes are situated in the peritoneal cavity. The ovary is found in the anterior portion of the gonad, and the testis is found in the posterior part. The animal becomes female if the cranial part of the gonad develops or male if the caudal part undergoes differentiation. If none develops, then the animal becomes sterile. If both anterior and posterior parts develop, then the animal becomes a functional hermaphrodite. However, hermaphroditism being characterised as functional needs to be validated by more reproduction studies (Patzner 1998).

Threats [top]

Major Threat(s): There are no known direct threats to the species.

Conservation Actions [top]

Conservation Actions: This species is found within Galápagos Marine Reserve so potentially safeguarded through enforcement activities. More research is needed on the species' biology, population size, distribution and impacts.

Citation: Mincarone, M.M. 2011. Eptatretus mccoskeri. The IUCN Red List of Threatened Species 2011: e.T196033A8996036. . Downloaded on 20 June 2018.
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