Overview

Comprehensive Description

Biology

A rare species (Ref. 26346) presumably inhabiting the insular slope of New Zealand (Ref. 247). Ovoviviparous (Ref. 205).
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Distribution

Range Description

New Zealand endemic. Recorded off the east coast of South Island, from Bank?s Peninsula to Pukaki Rise.
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Southwest Pacific: New Zealand. Possibly occurring off Australia (Ref. 6871).
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Southwestern Pacific.
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Physical Description

Morphology

Dorsal spines (total): 0
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Size

Maximum size: 803 mm TL
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Max. size

80.3 cm TL (male/unsexed; (Ref. 247))
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Diagnostic Description

Dark brown or black with a grey blaze on the back behind the eyes (Ref. 26346). Scymnodon-like, but with no dorsal spines and the first dorsal fin slightly more posterior than in Scymnodon species; snout somewhat flattened, not bulbous, lower teeth with very high, erect or semi-erect cusps, distal blades and no serrations, first dorsal on middle of back behind pectoral fins, caudal fin asymmetrical, with a short lower lobe, fins without prominent light edges (Ref. 247).
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
Reaches at least 80 cm total length (TL). Depth range: 400 to 500 m. An 80 cm TL male was mature.

Systems
  • Marine
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Environment

benthopelagic; marine
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Life History and Behavior

Life Cycle

Distinct pairing with embrace (Ref. 205).
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
DD
Data Deficient

Red List Criteria

Version
3.1

Year Assessed
2003

Assessor/s
Duffy, C. (SSG Australia & Oceania Regional Workshop, March 2003)

Reviewer/s
Shark Specialist Group Australia & Oceania Regional Group (Shark Red List Authority)

Contributor/s

Justification
A very poorly known species known from a few specimens trawled off the east coast of South Island, New Zealand between 400 and 500 m depth. May also occur off Australia. Nothing is known of the species ecology, and there is insufficient information to assess it beyond Data Deficient.
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Population

Population Trend
Unknown
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Threats

Major Threats
Infrequently taken in deepwater trawl fisheries.
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Data deficient (DD)
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Management

Conservation Actions

Conservation Actions
There are currently no conservation measures in place for this species.
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Relevance to Humans and Ecosystems

Benefits

Importance

fisheries: of no interest
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Wikipedia

Sherwood dogfish

The sherwood dogfish, Scymnodalatias sherwoodi, is a very rare sleeper shark of the family Somniosidae, found only around New Zealand. The only specimen studied was about 80 cm long.

The sherwood dogfish is ovoviviparous.

References[edit]

  • Froese, Rainer and Pauly, Daniel, eds. (2011). "Scymnodalatias sherwoodi" in FishBase. February 2011 version.
  • Tony Ayling & Geoffrey Cox, Collins Guide to the Sea Fishes of New Zealand, (William Collins Publishers Ltd, Auckland, New Zealand 1982) ISBN 0-00-216987-8
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