Hemigaleus australiensis

WHITE, LAST & COMPAGNO, 2005


Australian weasel shark
Classification: Elasmobranchii Carcharhiniformes Hemigaleidae

Reference of the original description
WHITE, W.T. & LAST, P.R. & COMPAGNO, L.J.V. (2005)
Description of a new species of weasel shark, Hemigaleus australiensis n. sp. (Carcharhiniformes : Hemigaleidae) from Australian waters. Zootaxa, 1077: 37–49

Image of the original description
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Description :


Citation: Hemigaleus australiensis WHITE, LAST & COMPAGNO, 2005: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 12/2018

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Common names
eng Australian weasel shark, eng Sickelfin weasel shark, eng Weasel shark

Short Description
Diagnosis: Medium-sized shark with moderately long head; dorsal fins slightly raked back, moderately or not falcate, moderately low; height of first dorsal fin 2.6-3 in head length (HL); length of first dorsal fin 2.1-2.4 times its height; caudal-fin upper lobe moderately broad, not elongate; caudal-fin ventral lobe short, preventral margin 9.3-9.8% TL; pectoral fins broad, falcate, base length 2.1-2.4 in preventral caudal margin; claspers of adults moderately short, inner length 5.4-5.6% TL, 1.8-1.8 in pelvic midpoint to first dorsal-fin insertion; teeth in 28-30/46-52 rows; precaudal vertebral centra 65-70, total vertebral centra 112-121; second dorsal fin with a conspicuous dark tip; first dorsal fin with a pale posterior margin [3389]. Description: The two species differ in meristics, coloration, morphometrics: with Hemigaleus australiensis having a total vertebrae 137-164 (vs. 112-121); precaudal vertebrae 79-100 (vs.65-70); number of tooth rows in lower jaw 45-52 (vs. 37-43); dark-tipped second dorsal fin (vs. white-tipped); size at maturity females 60-65 cm TL (vs. 74-80 cm TL) and males 60 cm TL (vs. >79 cm TL); size at birth 26-28 cm TL (vs. 47-49 cm TL) [3389].

Distribution
Eastern Indian Ocean to Western Pacific: Australia and where records from Papua New Guinea need to be confirmed. Source: www.gbif.org

Biology
Occurs on the continental shelf (Ref. 75154).

Size / Weight / Age
110 cm TL (male/unsexed; [3389])

Habitat
demersal; marine; depth range 12 - 170 m [3389]

Remarks
shark-references Species-ID=2649;

Parasites (arranged by Jürgen Pollerspöck)
Cestoda
  • Paraorygmatobothrium taylori CUTMORE, BENNETT & CRIBB, 2009 [7421] [25840]