第 0661 号，共 1 402 张

Brazilian brown spider

Loxosceles intermedia

需要看医生很少致命，但被咬了要去看医生。

咬伤吃：昆虫

The Brazilian brown recluse spider is a small spider that is highly venomous. It lives in parts of Brazil and Argentina, and it is one of the species linked to deaths from spider bites in South America. Its bite can seem mild at first, so it matters to know what it looks like.1

生活在

Brazil and Argentina: southeastern and southern Brazil, and northern Argentina1

南美洲

首页

It lives in dark, very dry cracks in warm regions below 500 m, and is often found under fallen tree trunks and debris. It is also common around or inside houses, where it has been found in socks, clothes, blankets, wardrobes and garages.1

长度

5.3 mm到8.5 mm (0.2 in到0.3 in)1

最高速度

约 0.86 公里/小时（0.53 英里/小时）

在陆地上, 粗略估计

它吃什么？

It eats insects such as cockroaches, crickets and beetles. It has also been reported to attack other arthropods, such as scorpions.1

Brazilian brown spider的照片 — Brazilian brown spider。照片：unknown。 CC0, iNaturalist.

怎样认出它

Carapace (the front body shield) is dull yellow to orange-brown, with a dark, U-shaped marking on the head area that contrasts with the yellowish thorax.1
Legs are orange-brown to reddish-brown.1
Abdomen is grey or blackened, and darker on top than underneath.1
Small spider: the female is about 8.5 mm long, and the male is smaller.1
Active at night and very shy, usually found in dark places.1

毒液之力

咬伤

它咬的时候，毒液通过毒牙或牙齿出来。

它的毒液会造成什么？

Its venom contains a high concentration of the enzyme sphingomyelinase D, which causes both local and whole-body effects. Symptoms usually take hours to appear. The bite starts with severe pain, redness, swelling and blisters, and in more severe cases the skin tissue can die. Whole-body effects can include damage to red blood cells, heart problems, low blood pressure, kidney failure and severe bleeding.1

它对人有多危险？

对人的危险: 严重被咬了要去看医生。死亡非常罕见。

It is one of the main species linked to deaths from spider bites in South America. Whole-body effects occur frequently after its bite. Because symptoms are delayed, a victim may think the bite was mild.1

它害怕时会做什么？

It is a very shy spider that keeps to dark places, so it is rarely seen.1

如果它咬人

清洗咬伤处，用冰袋冷敷止痛。如果疼得厉害、疼痛扩散或感到不适，就去看医生。

一定先拨打你的急救电话（112、000、911）。这里是一般急救指导，不是医疗建议。急救基础

注意安全

永远不要摸、抓或逗弄野生动物，即使是很小的，即使它看起来在睡觉或已经死了。
给它留出空间。如果遇到它，保持冷静，慢慢后退，让它走自己的路。
如果被它咬了：保持冷静，保持不动，拨打你的急救电话（112、000、911）或尽快去医院。记住它长什么样，拍张照片会有帮助。

它不是冲着你来的。它用毒液捕猎或保护自己，而且它更愿意躲起来。更多安全知识

在世界哪里？

非洲亚洲欧洲北美洲南美洲澳大利亚和大洋洲

它有多大？

它有多长？

小到能坐在你的指甲上

Brazilian brown spider和你比起来有多大？

只是在你的浏览器里算一算。什么都不会被保存或发送到任何地方。

它有多快？

一只陆龟 约 0.3 公里/小时 (0.19 mph)

Brazilian brown spider 约 0.86 公里/小时 (0.53 mph)

一个在走路的人 约 5 公里/小时 (3.1 mph)

值得了解

事实

The minimum dose that causes skin tissue death is 2.4 μg per kg of body weight.1

An average bite injects about 40 μg of venom proteins.1

It produces about 5.6 mg of venom, and the male produces less, around 2.43 mg.1

Males have much longer legs than females, although the female has the larger body.1

Its webs are irregular and built under fallen tree trunks and debris, usually in dark places.1

给毒液专家

学名: Loxosceles intermedia
类别: 蜘蛛
家人: Sicariidae2
排序: Araneae
大洲: 南美洲
宝宝: The female breeds in the hottest months of the year, laying about 20 eggs in a bag-shaped web, and the young take 46 days to hatch.1
对人的危险: 3 / 5: 严重3