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They are distinguished from true spiders by their two pairs of book lungs, vertically oriented chelicerae, and urticating setae. However, like all members of Psalmopoeus, P. irminia lack these urticating hairs but make up for it by having stronger venom compared to other New World tarantulas.
It is an Old World tarantula, so has no urticating hairs; its only defenses are biting and fleeing. This tarantula is known to have more potent venom than many tarantula species [ citation needed ] , but Cyriopagopus albostriatus venom was shown in a study to have the ability to regulate activity in voltage-gated sodium channels, which are ...
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".
Urticating hairs or urticating bristles are one of the primary defense mechanisms used by numerous plants, almost all New World tarantulas, and various lepidopteran caterpillars. Urtica is Latin for "nettle" (stinging nettles are in the genus Urtica ), and bristles that urticate are characteristic of this type of plant, and many other plants in ...
Although it has hairy legs, this tarantula is an Old World species and does not have urticating hairs on its abdomen. (Urticating hairs are hairs found in most new world species (those from North and South America) that can be shed in defence, they are barbed and may cause severe itching.) It also has a leg span which may reach 8 inches (20 cm).
They lack urticating hairs and are arboreal, often found in tree cavities. Many species have "dimples" on the abdomen, but this feature is not universal. Although their behavior is defensive, they lack both urticating hairs and the ability to stridulate, giving them a very mild venom. Their egg sacs can contain up to 200 spiderlings.
The hairs on tarantulas' legs can also cause irritation to human skin, which can include pain, swelling, redness and itching. There's so much more to learn about tarantulas, and we have all you ...
The hairs are extremely irritating to the skin and can rarely cause blindness if they get into the eye. Handling can also be dangerous to the tarantula - with terrestrial species such as L. parahybana, because they are so heavily bodied, a fall of more than a few inches can rupture the abdomen and severely injure or kill the tarantula.