Trechona venosa: Difference between revisions
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Trechona venosa is a species of a venomous spider edemic to South America.
| Trechona venosa | |
|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Chelicerata |
| Class: | Arachnida |
| Order: | Araneae |
| Infraorder: | Mygalomorphae |
| Family: | Dipluridae |
| Genus: | Trechona |
| Species: | T. venosa
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| Binomial name | |
| Trechona venosa Latreille, 1832
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Description and Behavior
T. venosa is a large mygalomorph from South America, they grow from 3 to 4.5 in length (1.2-1.8 inches). In wingspan, they can grow from 6 to 7 cm, equivalent to 2.4-2.8 inches respectively, while the fangs measure 3-4 mm in length. Its color is black or brownish-gray, with yellow stripes on the abdomen. T. venosa is not an aggressive spider, inhabiting plants in the tropical forests of the Atlantic Forest.[1]
They live on the edges of forests in places far from housing and human activity. They have nocturnal /twilight habits, they are solitary animals, meeting members of their species only during the mating season. They weave funnel-shaped webs.[2]
Distribution
These spiders are restricted to the Atlantic Forest of Brazil.[3]
Venom
The venom of T. venosa has a lethal dose of 0.070 mg for 20 grams rat by subcutaneous injection, and 0.030 mg by intravenous injection, 2 mg by intramuscular injection results in muscle contractions, paralysis and death in rats, while 0.4 mg results in death by tetanism, for pigeons, the lethal dose ranges from 0.01-0.007 mg, by intravenous injection. The average yield is 1,00 mg, and the maximum is 1,70 mg.[4][5] Symptoms in mice include severe pain, tremors, salivation, urine output, paroxysmal tetany, spasmodic breathing movements and coma.[2] Symptoms in humans are not known, as accidents are extremely rare, but symptomatic envenoming is possible.[1]
- ^ a b Auerbach, Paul S. (2011-10-31). Wilderness Medicine E-Book: Expert Consult Premium Edition - Enhanced Online Features. Elsevier Health Sciences. ISBN 978-1-4557-3356-9.
- ^ a b http://repositorio.unicamp.br/jspui/bitstream/REPOSIP/314604/1/Fontana_MarcosDias_D.pdf
- ^ https://www.locus.ufv.br/handle/123456789/2228
- ^ Habermehl, Gerhard G. (2013-03-07). Gift-Tiere und ihre Waffen: Eine Einführung für Biologen, Chemiker und Mediziner Ein Leitfaden für Touristen (in German). Springer-Verlag. ISBN 978-3-642-57925-7.
- ^ Bücherl, Wolfgang; Buckley, Eleanor E. (2013-09-24). Venomous Animals and Their Venoms: Venomous Invertebrates. Elsevier. ISBN 978-1-4832-6289-5.