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Overview

Comprehensive Description

Biology

Found on the continental slopes. Poorly known. Oviparous, probably one egg per oviduct laid at a time. Not utilized at present.
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Distribution

Range Description

The Flatnose Catsharkhas a patchy known distribution in the Indo-West Pacific from Suruga Bay, Japan southwards to the East China Sea, Taiwan, the Philippines, South China Sea, Borneo, the Norfolk Ridge and off Australia (Last and Stevens 2009, Ebert et al. 2013). In Australian waters it is known from off Geraldton, Western Australia, and from off Ingham, Queensland to Brush Island, New South Wales (Last and Stevens 2009).
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Western Pacific: Philippines, South and East China seas; northward to the Suruga Bay, Japan.
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Indo-West Pacific.
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Physical Description

Morphology

Dorsal spines (total): 0; Dorsal soft rays (total): 0; Analspines: 0; Analsoft rays: 0
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Size

Maximum size: 800 mm TL
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Max. size

80.0 cm TL (male/unsexed; (Ref. 244))
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Diagnostic Description

Diagnostic features include the very short abdomen, with interspace between pectoral and pelvic fins base shorter than 3/5 of anal fin base length; pectoral fin tip reaching beyond the midpoint between pectoral and pelvic fins; first dorsal fin smaller in area than the second dorsal; posterior end base (axil) of second dorsal clearly in front of anal fin axil; low anal fin with a long base. Egg capsule very slender; without tendrils, conical posterior end. Claspers without hooks, with posterior margin of exorhipidion forming a free lobe (Ref. 37959). Black, brown or grey (Ref. 11146), without conspicuous markings on fins (Ref. 244).
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Type Information

Type for Apristurus platyrhynchus
Catalog Number: USNM 93135
Collection: Smithsonian Institution, National Museum of Natural History, Department of Vertebrate Zoology, Division of Fishes
Preparation: Illustration
Year Collected: 1909
Locality: Sipadan Id., Vic. Sibuko B. Borneo, Indonesia, Pacific
Vessel: Albatross
  • Type: Fowler, H. W. 1934. Proceedings of the Academy of Natural Sciences of Philadelphia. 85: 237, fig. 2.
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Ecology

Habitat

Habitat and Ecology

Habitat and Ecology
The Flatnose Catsharkis a poorly known, continental slope species found between 400 and 1,080 m depth (Last and Stevens 2009, Ebert et al. 2013). It reaches a maximum size of 71 cm total length (TL) with both sexes maturing around 60 cm TL (Last and Stevens 2009, Ebert et al. 2013). Apristurus species are relatively small, sluggish sharks that live on or near the bottom. Where known, reproduction is oviparous with one egg per oviduct.

Systems
  • Marine
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Depth range based on 4 specimens in 1 taxon.

Environmental ranges
  Depth range (m): 315 - 759

Graphical representation

Depth range (m): 315 - 759
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Environment

bathypelagic; marine; depth range 759 - ? m (Ref. 58018)
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Depth range based on 4 specimens in 1 taxon.

Environmental ranges
  Depth range (m): 315 - 759

Graphical representation

Depth range (m): 315 - 759
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Life History and Behavior

Life Cycle

Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449).
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Molecular Biology and Genetics

Molecular Biology

Barcode data: Apristurus platyrhynchus

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There are 5 barcode sequences available from BOLD and GenBank.

Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.

See the BOLD taxonomy browser for more complete information about this specimen and other sequences.

CCTTTACCTAATTTTTGGTGCATGAGCAGGAATAGTTGGAATGGCTTTAAGCTTATTAATTCGTGCTGAACTAGGTCAACCCGGATCTCTTTTGGGAGATGATCAGATTTACAATGTGATCGTTACCGCCCATGCCTTTGTAATAATCTTTTTTATGGTTATACCAGTAATAATTGGTGGCTTTGGTAATTGACTTGTTCCTTTGATAATTGGTGCGCCAGACATAGCGTTCCCGCGTATAAATAATATAAGCTTCTGACTCCTCCCCCCCTCTTTCTTACTTCTCTTGGCTTCTGCAGGGGTTGAAGCGGGAGCAGGAACCGGGTGAACTGTTTATCCCCCCCTAGCTGGTAACTTAGCACACGCTGGGCCATCCGTTGACCTAGCTATCTTTTCCCTCCATCTGGCCGGTGTTTCATCTATTTTGGCCTCAATTAATTTTATTACAACCATTATTAATATAAAACCCCCAGCCATTTCCCAATATCAAACGCCCCTATTTGTTTGGTCAATTCTTATTACCACTGTTCTTCTTCTTCTCTCTCTCCCAGTTCTTGCAGCCGGAATTACAATATTACTTACAGACCGCAACCTTAATACAACATTTTTTGACCCTGCTGGAGGGGGGGACCCCATTCTCTATCAACACCTA
-- end --

Download FASTA File

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Statistics of barcoding coverage: Apristurus platyrhynchus

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 5
Specimens with Barcodes: 10
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LC
Least Concern

Red List Criteria

Version
3.1

Year Assessed
2015

Assessor/s
Duffy, C.A.J. & Huveneers, C.

Reviewer/s
Kyne, P.M. & Walls, R.H.L.

Contributor/s
Kyne, P.M. & Walls, R.H.L.

Justification
The Flatnose Catshark (Apristurus platyrhynchus) is a poorly known, deepwater shark with a patchy known distribution in the Indo-West Pacific. It occurs on the continental slope at depths of 400-1,080 m. It is probably taken as bycatch in deepwater trawl, set net and line fisheries throughout its range, particularly as this species occurs shallower than many otherApristurusspecies. However, at least in a large part of its Australian range fishing pressure is minimal allowing it refuge at greater depths, and it can therefore be assessed as Least Concern.

History
  • 2004
    Data Deficient (DD)
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Population

Population
There is currently no information available on population size or trends for this species.

Population Trend
Unknown
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Threats

Major Threats
This catshark is probably taken as bycatch in deepwater trawl, set net and line fisheries that overlap with its range. This species may be caught more regularly in deepwater trawl fisheries than other Apristurus species given its relatively shallower occurrence. Parts of the eastern Australian continental slope for example have been subjected to heavy trawling pressure, however, the range of this species off eastern Australia is primarily outside of heavily fished areas. Deepwater fishing effort is very low where it occurs off northeast Queensland (Noriega et al. 2014).
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Data deficient (DD)
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Management

Conservation Actions

Conservation Actions
No conservation actions are currently 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

Flatnose cat shark

The flatnose cat shark, Apristurus acanutus, is a cat shark of the family Scyliorhinidae found in the northwest Pacific Ocean off Zhujiang, South China Sea. This species is now considered a junior synonym of A. platyrhynchus.

See also[edit]

References[edit]

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Spatulasnout catshark

The spatulasnout catshark or Borneo catshark, Apristurus platyrhynchus, is a catshark of the family Scyliorhinidae, found in the western Pacific between 35°N and 1° N. Its length is up to 80 cm.

See also[edit]

References[edit]

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