Blacktailed spurdog

The blacktailed spurdog (Squalus melanurus) is a dogfish, a member of the family Squalidae, found around New Caledonia in the central Pacific Ocean, at depths from 320 to 320 m. Its length is up to 75 cm.

Blacktailed spurdog
from New Caledonia
Conservation status
Data Deficient  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Division:	Selachii
Order:	Squaliformes
Family:	Squalidae
Genus:	Squalus
Species:	S. melanurus
Binomial name
Squalus melanurus Fourmanoir & Rivaton, 1979
Range of the blacktailed spurdog (in blue)

• Sharks portal

Its reproduction is ovoviviparous.

Parasites

The blacktailed spurdog has been seldom studied for parasites. The 1 mm-long monogenean Triloculotrema chisholmae has been described in 2009 from three specimens found in the nasal tissue of a single shark caught off New Caledonia.^[2] T. chisholmae was the second species described in the genus Triloculotrema Kearn, 1993 (family Monocotylidae).^[3] Species of Triloculotrema appear to be limited to deep-sea sharks, either triakids or squalids (possibly etmopterids).^[2]
The blacktailed spurdog is also the host of external parasites such as the aegid isopod Aega angustata on the skin.^[4] Internal parasites include several trypanorhynch cestodes in the spiral intestine, such as Vittirhynchus squali and Gilquinia sp.^[5]

Gallery

• 
  Squalus melanurus, head
• 
  Squalus melanurus, dorsal fin and spine
• 
  Squalus melanurus, ventral view of male