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Squalus notocaudatus
Last, White & Stevens, 2007
Bartail spurdog
Classification: Elasmobranchii Squaliformes Squalidae
Reference of the original description
Part 5 - New species of Squalus of the highfin megalops group from the Australasian region. CSIRO Marine and Atmospheric Research Paper, 14, 39–53
Part 5 - New species of Squalus of the highfin megalops group from the Australasian region. CSIRO Marine and Atmospheric Research Paper, 14, 39–53
Image of the original description
Ventral view of the head of Squalus notocaudatus sp. nov. holotype (CSIRO H 1368–02, immature male 619 mm TL). In: Last, P.R. & White, W.T. & Stevens, J.D. 2007 Part 5 - New species of Squalus of the highfin megalops group from the Australasian region. CSIRO Marine and Atmospheric Research Paper, 14: 39-53
Ventral view of the head of Squalus notocaudatus sp. nov. holotype (CSIRO H 1368–02, immature male 619 mm TL). In: Last, P.R. & White, W.T. & Stevens, J.D. 2007 Part 5 - New species of Squalus of the highfin megalops group from the Australasian region. CSIRO Marine and Atmospheric Research Paper, 14: 39-53
Types
Squalus notocaudatus
Holotype: CSIRO: H 1368-02; Paratype: CSIRO: H 1321-01; CSIRO: H 1323-01; CSIRO: H 1322-01;
Squalus notocaudatus
Holotype: CSIRO: H 1368-02; Paratype: CSIRO: H 1321-01; CSIRO: H 1323-01; CSIRO: H 1322-01;
Description :
Citation: Squalus notocaudatus Last, White & Stevens, 2007: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 02/2025
Please send your images of "Squalus notocaudatus" to info@shark-references.com
Ventral view of the head of Squalus notocaudatus sp. nov. holotype (CSIRO H 1368–02, immature male 619 mm TL). In: Last, P.R. & White, W.T. & Stevens, J.D. 2007 Part 5 - New species of Squalus of the highfin megalops group from the Australasian region. CSIRO Marine and Atmospheric Research Paper, 14: 39-53
Ventral view of the head of Squalus notocaudatus sp. nov. holotype (CSIRO H 1368–02, immature male 619 mm TL). In: Last, P.R. & White, W.T. & Stevens, J.D. 2007 Part 5 - New species of Squalus of the highfin megalops group from the Australasian region. CSIRO Marine and Atmospheric Research Paper, 14: 39-53
Common names
Bartail spurdog
Bartail spurdog
Short Description
This species in the "quot;highfin megalops group"quot; is distinguished by the following set of characters: abdomen depth 8.6-11.1% TL; pre-vent length 45.3-46.5% TL, 1.9-2.0 times dorsal caudal margin; pre-second dorsal length 3.6-4.0 times pectoral-fin anterior margin, 2.4-2.6 times dorsal caudal margin; head width 1.4-1.6 times abdomen width; preoral length 2.8-3.2 times the horizontal prenarial length, 8.4-9.5% TL; head length 3.8-4.3 times its eye length; mouth width 3.4-4.3 times the length of upper labial furrow; interorbital width 1.4-1.5 times the horizontal preorbital length; fifth gill slit height 1.9-2.1% TL; strongly bifurcated anterior nasal flap; first dorsal fin upright, upper posterior margin almost vertical, greatest concavity closer to free rear tip than fin apex; posterior margin of second dorsal fin deeply concave; second dorsal-fin spine with a broad base; pectoral fin of adult weakly falcate, anterior margin long, 14.6-16.4% TL; both dorsal and ventral surfaces are pale; dorsal fins pale with obvious dark tips; first dorsal-fin spine and base of soft portion of dorsal fin both pale; caudal fin with broad white posterior margin; prominent dark, diagonal subterminal streak parallel to the upper posterior margin; flank denticles strongly tricuspid; monospondylous centra 47-49, precaudal centra 94-97, total centra 123-127 [3331].
This species in the "quot;highfin megalops group"quot; is distinguished by the following set of characters: abdomen depth 8.6-11.1% TL; pre-vent length 45.3-46.5% TL, 1.9-2.0 times dorsal caudal margin; pre-second dorsal length 3.6-4.0 times pectoral-fin anterior margin, 2.4-2.6 times dorsal caudal margin; head width 1.4-1.6 times abdomen width; preoral length 2.8-3.2 times the horizontal prenarial length, 8.4-9.5% TL; head length 3.8-4.3 times its eye length; mouth width 3.4-4.3 times the length of upper labial furrow; interorbital width 1.4-1.5 times the horizontal preorbital length; fifth gill slit height 1.9-2.1% TL; strongly bifurcated anterior nasal flap; first dorsal fin upright, upper posterior margin almost vertical, greatest concavity closer to free rear tip than fin apex; posterior margin of second dorsal fin deeply concave; second dorsal-fin spine with a broad base; pectoral fin of adult weakly falcate, anterior margin long, 14.6-16.4% TL; both dorsal and ventral surfaces are pale; dorsal fins pale with obvious dark tips; first dorsal-fin spine and base of soft portion of dorsal fin both pale; caudal fin with broad white posterior margin; prominent dark, diagonal subterminal streak parallel to the upper posterior margin; flank denticles strongly tricuspid; monospondylous centra 47-49, precaudal centra 94-97, total centra 123-127 [3331].
Remarks
shark-references Species-ID=6806;
shark-references Species-ID=6806;
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