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Tarantulas comprise a group of large and often hairy spiders of the family Theraphosidae. [2] As of December 2023, 1,100 species have been identified, with 166 genera. [3] The term "tarantula" is usually used to describe members of the family Theraphosidae, although many other members of the same infraorder (Mygalomorphae) are commonly referred to as "tarantulas" or "false tarantulas".
The Australian funnel-web spiders (family Atracidae), such as the Sydney funnel-web spider Atrax robustus (a mygalomorph spider, not to be confused with the araneomorph funnel-weaver or grass spiders) are regarded as among the most venomous in the world. They react vigorously to threats and, reputedly, will more often attempt to bite than run away.
Lycosa tarantula is the species originally known as the tarantula, a name that nowadays in English commonly refers to spiders in another family entirely, the Theraphosidae. It now may be better called the tarantula wolf spider , being in the wolf spider family, the Lycosidae.
Almost all spiders are venomous, but not all spider bites result in the injection of venom. Pain from non-venomous bites, so-called "dry bites", typically lasts for 5 to 60 minutes while pain from envenomating spider bites may last for longer than 24 hours. [9] Bleeding also may occur with a bite.
The cobalt blue tarantula is a medium-sized tarantula with a leg span around 13 cm (5.1 in). It is noted for its iridescent blue legs and light gray prosoma and opisthosoma, the latter of which may contain darker gray chevrons. [3] [4] Males and females look the same until the ultimate (final) molt of the males.
The thick footed tarantula has powerful long venomous fangs that can grow up to 1 centimetre (0.39 in) long. Its body is 6 centimetres (2.4 in) with a leg span of 16 centimetres (6.3 in) so smaller than the size of a man's hand.
Avicularia avicularia, sometimes called the pinktoe tarantula, is a species of tarantula native from Venezuela, Guyana, Suriname, French Guiana and Trinidad and Tobago to Peru, Bolivia and Brazil. [1]
Chaetopelma olivaceum is a species of mygalomorph spider, belonging to the tarantula family (Theraphosidae). It has many synonyms, including Ischnocolus jerusalemensis. [1] Common names used include black furry, [2] black tarantula and Middle East gold. [3]