Bathothauma lyromma 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Cephalopoda Oegopsida Cranchiidae

Scientific Name: Bathothauma lyromma Chun, 1906
Taxonomic Notes: This is the only species in the genus Bathothauma.

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2014
Date Assessed: 2010-04-29
Assessor(s): Barratt, I. & Allcock, L.
Reviewer(s): Young, R., Vecchione, M. & Böhm, M.
Bathothauma lyromma is an oceanic species which has a wide geographic distribution and inhabits deep-water, making it is less susceptible to human impact. It has therefore been assessed as Least Concern. However, more research is still needed on its ecology and biology.

Geographic Range [top]

Range Description:This species has a worldwide distribution in tropical and subtropical waters, as well as temperate waters of the northeast Atlantic and South Pacific (Young and Mangold 1996). It does not occur in the subtropical South Atlantic (Young and Mangold 1996).
Countries occurrence:
Australia; Mexico; Suriname; United States (Florida, Hawaiian Is.)
FAO Marine Fishing Areas:
Atlantic – northwest; Atlantic – eastern central; Atlantic – western central; Atlantic – northeast; Indian Ocean – western; Pacific – southeast; Pacific – southwest; Pacific – western central; Pacific – eastern central
Additional data:
Lower depth limit (metres):1500
Upper depth limit (metres):100
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:Its population size is unknown.
Current Population Trend:Unknown
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:This species occurs worldwide in tropical to temperate seas (Young and Mangold 1996). A characteristic of this species is the very large size that the planktonic paralarvae reaches (up to 100 mm in mantle length) compared to the adult size (up to 200 mm in mantle length) (Young and Mangold 1996). The paralarvae have long eye stalks (Young and Mangold 1996) and occur in the upper water column (~100 to 300 m in depth) (Voss et al. 1992). This species undergoes ontogenetic vertical migration with larger individuals moving to deeper depths (to more than 1,500 m in depth) (Voss et al. 1992). They seem to mature and mate at deep depths (Voss et al. 1992).

Use and Trade [top]

Use and Trade: Members of the Cranchiidae are not targeted by fisheries (Norman 2003).

Threats [top]

Major Threat(s): The threats to this species are unknown.

Conservation Actions [top]

Conservation Actions: There are no species-specific conservation measures in place for this species. Further research is recommended, specifically on the distribution, population abundance and ecology of this species.

Citation: Barratt, I. & Allcock, L. 2014. Bathothauma lyromma. The IUCN Red List of Threatened Species 2014: e.T163338A999779. . Downloaded on 22 November 2017.
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