''Gandalfus yunohana'' is a

species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...

of blind

crab Crabs are decapod crustaceans of the infraorder Brachyura, which typically have a very short projecting "tail" (abdomen) ( el, βραχύς , translit=brachys = short, / = tail), usually hidden entirely under the thorax. They live in all the ...

found on

hydrothermal vent A hydrothermal vent is a fissure on the seabed from which geothermally heated water discharges. They are commonly found near volcanically active places, areas where tectonic plates are moving apart at mid-ocean ridges, ocean basins, and hotspot ...

s on the eastern edge of the

Philippine Sea Plate The Philippine Sea Plate or the Philippine Plate is a tectonic plate comprising oceanic lithosphere that lies beneath the Philippine Sea, to the east of the Philippines. Most segments of the Philippines, including northern Luzon, are part of ...

south of

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

. It lives at shallower depths than other members of the family

Bythograeidae The Bythograeidae are a small family of blind crabs which live around hydrothermal vents. The family contains 16 species in six genera. Their relationships to other crabs are unclear. They are believed to eat bacteria and other vent organisms. By ...

, at . Because no light penetrates to such depths, the eyes of ''G. yunohana'' are immobile and unpigmented. Males have a

carapace A carapace is a Dorsum (biology), dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tor ...

up to across, while females are larger, at . It was originally described as ''Austinograea yunohana'' in 2000, but was transferred in 2007 by Colin McLay to his new genus, '' Gandalfus'', named after the character

Gandalf Gandalf is a protagonist in J. R. R. Tolkien's novels ''The Hobbit'' and ''The Lord of the Rings''. He is a Wizards (Middle-earth), wizard, one of the ''Istari'' order, and the leader of the Fellowship of the Ring (characters), Fellowship of t ...

from ''

The Lord of the Rings ''The Lord of the Rings'' is an epic high-fantasy novel by English author and scholar J. R. R. Tolkien. Set in Middle-earth, intended to be Earth at some time in the distant past, the story began as a sequel to Tolkien's 1937 children's boo ...

''.

References

External links

* Crabs Animals living on hydrothermal vents Crustaceans described in 2000 Organisms named after Tolkien and his works {{crab-stub