Squalus bucephalus
Last, Séret & Pogonoski, 2007
Bighead spurdog
Classification: Elasmobranchii Squaliformes Squalidae
Reference of the original description
Part 3 - Squalus bucephalus sp nov., a new short-snout spurdog from New Caledonia. CSIRO Marine and Atmospheric Research Paper, 14, 23–29.
Part 3 - Squalus bucephalus sp nov., a new short-snout spurdog from New Caledonia. CSIRO Marine and Atmospheric Research Paper, 14, 23–29.
Image of the original description
![](/images/species/Squalus_bucephalus_holotyp.jpg)
Lateral view of Squalus bucephalus sp. nov. holotype (MNHN 2006–1754, immature male 556 mm TL). In: Last, P.R. & Séret, B. & Pogonoski, J.J. 2007 Part 3 - Squalus bucephalus sp nov, a new short-snout spurdog from New Caledonia. CSIRO Marine and Atmospheric Research Paper, 14: 23-29
![](/images/species/Squalus_bucephalus_holotyp.jpg)
Lateral view of Squalus bucephalus sp. nov. holotype (MNHN 2006–1754, immature male 556 mm TL). In: Last, P.R. & Séret, B. & Pogonoski, J.J. 2007 Part 3 - Squalus bucephalus sp nov, a new short-snout spurdog from New Caledonia. CSIRO Marine and Atmospheric Research Paper, 14: 23-29
Description :
Citation: Squalus bucephalus Last, Séret & Pogonoski, 2007: In: Database of modern sharks, rays and chimaeras, www.shark-references.com, World Wide Web electronic publication, Version 07/2024
Please send your images of "Squalus bucephalus" to info@shark-references.com
Ventral view of the head of Squalus bucephalus sp. nov. holotype (MNHN 2006–1754, immature male 556 mm TL).In: Last, P.R. & Séret, B. & Pogonoski, J.J. 2007 Part 3 - Squalus bucephalus sp nov, a new short-snout spurdog from New Caledonia. CSIRO Marine and Atmospheric Research Paper, 14: 23-29
![](/images/species/Squalus_bucephalus_holotyp_2.jpg)
Ventral view of the head of Squalus bucephalus sp. nov. holotype (MNHN 2006–1754, immature male 556 mm TL).In: Last, P.R. & Séret, B. & Pogonoski, J.J. 2007 Part 3 - Squalus bucephalus sp nov, a new short-snout spurdog from New Caledonia. CSIRO Marine and Atmospheric Research Paper, 14: 23-29
Common names
Aiguillat à grosse tête,
Bighead spurdog
![fra \(T\)](/images/flags/fr.gif)
![eng](/images/flags/gb.gif)
Short Description
This large, broad-headed species of the "quot;megalops-cubensis group"quot; is distinguished by the following set of characters: head width at mouth 12.1-13.5% TL; mouth width 2.2-2.7 times its horizontal prenarial length; direct pre-second dorsal length 3.9-4.0 times the pectoral-fin anterior margin, 2.7 times dorsal caudal margin; preoral length 2.7-3.1 times the horizontal prenarial length, 9.2-10.5% TL; strongly bifurcated anterior nasal flap; low and raked first dorsal fin; exposed bases of dorsal-fin spines are broad, 0.7-0.8% TL; both dorsal fins with short inner margins, first dorsal-fin height 1.4-1.5 times its inner margin length, second dorsal-fin height 0.8-1.0 times its inner margin length; pectoral-fin anterior margin 1.8-2.0 times its inner margin length; preventral caudal margin 1.8-2.2 times the inner margin of pelvic fin; dorsal fins with dark distal portion, posterior margin of free rear tip pale; caudal fin upper posterior margin broadly white, lower lobe with dark base and pale outer half, no caudal bar; flank denticles unicuspid or weakly tricuspid; monospondylous centra 45, precaudal centra 86-89, total centra 113-118 [3329].
This large, broad-headed species of the "quot;megalops-cubensis group"quot; is distinguished by the following set of characters: head width at mouth 12.1-13.5% TL; mouth width 2.2-2.7 times its horizontal prenarial length; direct pre-second dorsal length 3.9-4.0 times the pectoral-fin anterior margin, 2.7 times dorsal caudal margin; preoral length 2.7-3.1 times the horizontal prenarial length, 9.2-10.5% TL; strongly bifurcated anterior nasal flap; low and raked first dorsal fin; exposed bases of dorsal-fin spines are broad, 0.7-0.8% TL; both dorsal fins with short inner margins, first dorsal-fin height 1.4-1.5 times its inner margin length, second dorsal-fin height 0.8-1.0 times its inner margin length; pectoral-fin anterior margin 1.8-2.0 times its inner margin length; preventral caudal margin 1.8-2.2 times the inner margin of pelvic fin; dorsal fins with dark distal portion, posterior margin of free rear tip pale; caudal fin upper posterior margin broadly white, lower lobe with dark base and pale outer half, no caudal bar; flank denticles unicuspid or weakly tricuspid; monospondylous centra 45, precaudal centra 86-89, total centra 113-118 [3329].
Distribution
Western Pacific: northern Tasman Sea on Norfolk Ridge (Stylaster Seamount), and off New Caledonia.
Western Pacific: northern Tasman Sea on Norfolk Ridge (Stylaster Seamount), and off New Caledonia.
Remarks
shark-references Species-ID=6722;
shark-references Species-ID=6722;
Parasites (arranged by Jürgen Pollerspöck)
Copepoda
Copepoda
- Pseudopandarus cairae Bernot & Boxshall, 2017 [25052]