The skin is densely covered by thin, needle-like dermal denticles in a random pattern, except for the lips and the tips of the fins. The caudal fin is low, with a moderate lower lobe and a ventral notch near the tip of the upper lobe. The second dorsal fin has twice the area of the first and is larger than the pectoral or pelvic fins, and originates over the end of the pelvic fin bases. The first dorsal fin originates over the trailing margins of the pectoral fins. The trunk is short, with two relatively closely spaced, large dorsal fins bearing grooved spines in front. Scattered, sparse papillae are inside the mouth and on the edges of the gill arches. The lower teeth each have a single, strongly oblique cusp, and their bases are interlocked to form a continuous cutting surface. The upper teeth of adult males have a single cusp flanked by two pairs of smaller cusplets, while the upper teeth of females are more robust and have only one pair of lateral cusplets flanking the central cusp. There are 25–32 tooth rows in the upper jaw and 30–34 tooth rows in the lower jaw. The nares are large and preceded by poorly developed flaps of skin. The eyes are large, twice as long as high, with the anterior and posterior corners acute. It has a long, wide, flattened head comprising a fourth to a fifth of its total length. The dwarf lanternshark appears to reach a maximum length of about 20 cm (7.9 in) (female). This shark apparently inhabits the upper continental slope at a depth of 283–439 m (928–1,440 ft). decacuspidatus) in having irregularly arranged, needle-shaped dermal denticles.Īt present, the dwarf lanternshark has only been reported from a small area of the Caribbean Sea off the coasts of Colombia and Venezuela, occurring between Barranquilla and Santa Marta, near the Guajira Peninsula, and between the Los Testigos Islands and Grenada. gracilispinis), and combtooth lanternshark ( E. This species is grouped with the velvet belly lantern shark ( E. The type specimen is a 18.2 cm (7.2 in) long female caught in the Caribbean Sea off the coast of Colombia. Gilbert, and published their findings in a 1985 Copeia paper. They dubbed the new species in honor of noted shark biologist Perry W. Fish and Wildlife Service research ship Oregon in 1964. Burgess described the dwarf lantern-shark from specimens collected via trawling by the U.S. His close relatives is the Caribbean Velvey Belly Lantern-Shark, Fringefrin Brown Lantern-Shark and Comb-Tooth Broad-Banded Lantern-Shark.Īmerican ichthyologists Stewart Springer and George H. The dwarf lantern-shark is not significant to commercial fisheries, but could be threatened by mortality from bycatch the degree of impact from human activities on its population is unknown. Reproduction is aplacental viviparous, with females gestating two or three young at a time. Like other members of its genus, it is capable of producing light from a distinctive array of photophores. This species can be identified by its small size at maturity, long flattened head, and pattern of black ventral markings and a mid-dorsal line. It is known to be present only on the upper continental slopes off Colombia and Venezuela, at a depth of 283–439 m (928–1,440 ft). Sharks have amazing Adaptation capabilites.The dwarf lantern-shark ( Etmopterus perryi) is a little-known species of dogfish shark in the family Etmopteridae and possibly the smallest shark in the world, reaching a maximum known length of 20 cm (7.9 in). The Whale Shark is also the largest fish alive.Ħ. The largest shark is the Whale Shark which is almost 40įeet in length. The smallest shark is the Dwarf Lantern Shark which is only about 7 The Dwarf Lantern Shark, that grows to about 15 cm. Sharks (especially when they discover that only More Sharks, all of which will make readers fall madly in love with The dwarf lantern shark, which is "just bigger than a chocolateīar," and black lantern sharks and swell sharks and cookie-cutter Quantity: People who viewed this also viewedThomas's ABC Book Thomas's Moreĭwarf lantern shark, which cruises with its own l. * Most sharks have at least four rows of teeth. * About 75 shark species are in danger of becoming extinct * The dwarf lantern shark is the smallest shark Most sharks are less than three feet long as adults. Shark, measuring larger than a school bus at lengths of about 40 feet. The smallest, at only seven inches, is the dwarf lantern shark thatĬould fit in the palm of an adult’s hand. Only 17 centimeters (7 in) in span, to the whale shark. The Dwarf lantern shark lives in the bathypelagic, marine, depth range 283 - 439 m environment.ĭwarf lantern shark, Etmopterus perryi, an unfathomable sea kind of Permission: GNU Free Documentation License Picture of the Dwarf lantern shark has been licensed under a GFDL Original source: Own work
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