''Grammostola alticeps'' (known as Brazilian greysmoke spider in the pet industry) is a New World spider in the

tarantula Tarantulas comprise a group of large and often hairy spiders of the family Theraphosidae. , 1,100 species have been identified, with 166 genera. The term "tarantula" is usually used to describe members of the family Theraphosidae, although ...

family (Theraphosidae). It is

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

Uruguay Uruguay, officially the Oriental Republic of Uruguay, is a country in South America. It shares borders with Argentina to its west and southwest and Brazil to its north and northeast, while bordering the Río de la Plata to the south and the A ...

Paraguay Paraguay, officially the Republic of Paraguay, is a landlocked country in South America. It is bordered by Argentina to the Argentina–Paraguay border, south and southwest, Brazil to the Brazil–Paraguay border, east and northeast, and Boli ...

, and

Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ...

Description

''Grammostola alticeps'' have a light reddish/orange underbelly, and are 6–7 inches in length. In captivity they are fed crickets and roaches.

Stridulating organ

The stridulating organ, used to make a hissing sound (

stridulation Stridulation is the act of producing sound by rubbing together certain body parts. This behavior is mostly associated with insects, but other animals are known to do this as well, such as a number of species of fish, snakes and spiders. The mech ...

), consists of a large cluster of fine close-set bristles on the rear surface of the coxa of the palp, and two smaller clusters at the far end of the front surface of the coxa of the first leg, one just above and the other just below the suture. Pocock, 1903 : ''On some genera and species of South American Aviculariidae.'' Annals and Magazine of Natural History, (7) 11: 81-115.
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References

Theraphosidae Spiders of Uruguay Spiders of Paraguay Spiders of Brazil Spiders described in 1903 {{Theraphosidae-stub