Trechona venosa
species of arachnid
Trechona venosa is a species of a venomous spider endemic to South America.
Description and behavior
Trechona venosa is a large South American mygalomorphae, 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. Trechona venosa is not an aggressive spider, inhabiting plants in the tropical forests of the Atlantic Forest.
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.
Distribution
These spiders are restricted to the Atlantic Forest of Brazil.
Venom
The venom of Trechona 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.
This brief starts where responsible research should: with the source description of “Trechona venosa” as species of arachnid. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the science & nature register because the source frames it as species of arachnid. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Mar 15, 2026. The linked authority identifier is Q2320066. None of the 0 selected statements returned an explicit reference.
A general summary may omit uncertainty, sample limits or methodological disagreement that is explicit in the technical record. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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Questions for further research
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This entry incorporates text from “Trechona venosa” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.