The Longnose Sleeper shark (Somniosus sp. A) is a Sleeper shark of the family Somniosidae. The only found shark was found off the coast of Portugal in deep water.
Family: Somniosidae – Sleeper sharks
Genus: Somniosus
Species: sp. A
Phylum– Chordata
Class– Chondrichthyles
Subclass– Elasmobranchii
Common Name– Dogfish Sharks
Family– Somniosidae
Common Name– Sleeper Sharks
Genus– Somniosus
Species– sp. A
Status: IUCN Red List DATA DEFICIENT
Average Size and Length: Known from one species: 2.7 feet.
Teeth and Jaw: The Longnose Sleeper shark has spear-like upper teeth and lower teeth made for cutting with short, low and strongly oblique cusps and high, narrow roots.
Head: The Longnose Sleeper shark has an elongated, pointed and flattened snout. The head is long.
Tail: The caudal peduncle is very long. The caudal fin is short with a long ventral lobe.
Demographic, Distribution, Habitat, Environment and Range: The Longnose Sleeper shark is a holotype, and the only found species was off the coast of Portugal in deep water.
Aesthetic Identification: There are two spineless dorsal fins of equal size on the Longnose Sleeper shark. The first dorsal fin insertion is closer to the pelvic bases rather than the pectoral fins.
Biology and Reproduction: Unknown.
Behavioral Traits, Sensing and Intelligence: Unknown.
Longnose Sleeper Shark Future and Conservation: Not evaluated. Holotype.
Longnose Sleeper Shark Recorded Attacks on Humans: Not a threat to humans.