Venom Wiki / Semua makhluk / Labah-labah

No. 0653 daripada 1 402

Brown recluse

Loxosceles reclusa

Tentang nama: The scientific name reclusa means 'recluse', which refers to the spider's shy, hidden way of life.1

Perlu jumpa doktorJarang membawa maut, tetapi gigitannya perlu dirawat doktor.

Labah-labah

GigitanMakan: Daging

Bahaya kepada manusia: SeriusGigitannya perlu dirawat doktor. Kematian sangat jarang berlaku.

The brown recluse is a small spider with a violin-shaped mark on its back. It lives mainly in the central and southern United States, where it hides in dark, quiet places such as woodpiles and sheds. It is one of only two North American spiders with dangerous venom, the other being the black widow.1

Hidup di

Southern and central United States, from southeastern Nebraska south to central Texas and western Georgia1

Amerika Utara

Laman utama

Brown recluses build irregular webs in dry, undisturbed places such as woodpiles, sheds, closets, garages, plenum spaces and cellars. In homes they seem to favour cardboard. People are usually bitten when the spider is trapped against the skin, for example inside clothes, shoes, towels, bedding or work gloves.1

Panjang

6 mm hingga 2 cm (0.2 in hingga 0.8 in)1

Kelajuan maksimum

kira-kira 0.8 km/j (0.5 mph)

Di darat, anggaran kasar

Apa yang ia makan?

Brown recluses leave their lairs at night to hunt, unlike most web-weaving spiders. If food becomes scarce, they will occasionally, though not habitually, eat other brown recluses.1

Gambar Brown recluse — Brown recluse. Gambar: Rosa Pineda. CC BY-SA 3.0, Wikimedia Commons.

Cara mengenalinya

A dark violin-shaped marking on the top of the front body, with the neck of the violin pointing towards the rear of the spider1
Typically light to medium brown, though colours range from whitish to dark brown or blackish grey1
Six eyes arranged in three pairs, while most spiders have eight1
No obvious patterns on the abdomen or legs, and no spines on the legs1
Usually 6 to 20 millimetres in body length, but may grow larger1

Sering dikelirukan dengan: The violin marking is not a reliable identifier, because cellar spiders and pirate spiders can have similar markings. The Mediterranean recluse, an introduced species, is almost indistinguishable from the brown recluse, so many reports of recluses are misidentifications. A spider in the genus Titiotus is the most common spider mistaken for a brown recluse in California, and its bite is considered harmless.1

Kuasa bisa

Gigitan

Bisa keluar melalui taring atau giginya apabila ia menggigit.

Apa kesan bisanya?

The venom is necrotic, meaning it destroys tissue. It contains a dermonecrotic agent called sphingomyelinase D, which kills the skin around the bite. In some cases the venom spreads through the body within minutes, causing nausea, vomiting, fever, rashes and muscle and joint pain. Rarely, it can burst red blood cells (hemolysis).1

Berapa bahaya ia kepada manusia?

Bahaya kepada manusia: SeriusGigitannya perlu dirawat doktor. Kematian sangat jarang berlaku.

Most bites cause no skin damage, and the spider is rarely aggressive. In one clinical study, skin necrosis occurred in 37% of diagnosed bites and systemic illness in 14%. Rarely, bites can cause organ damage or death. Most fatalities have been in children under seven or in people with weak immune systems. Children, the elderly and seriously ill people may be more susceptible to systemic effects.1

Apa yang ia buat apabila takut?

When alarmed, it lowers its body, raises its pedipalps and stands still in a defensive pose. It usually flees, and if caught it may play dead.1

Jika ia menggigit

Basuh tempat gigitan dan letakkan pek ais untuk menghilangkan sakit. Dapatkan bantuan perubatan jika sakitnya kuat, merebak atau orang itu berasa tidak sihat.

Sentiasa hubungi nombor kecemasan dahulu (112, 000, 911). Ini panduan pertolongan cemas umum, bukan nasihat perubatan. Asas pertolongan cemas

Kekal selamat

Jangan sesekali sentuh, tangkap atau usik haiwan liar, walaupun yang kecil, dan walaupun ia nampak tidur atau mati.
Beri ia ruang. Jika kamu terjumpa, bertenang, undur perlahan-lahan dan biarkan ia pergi.
Jika ia menggigit kamu: bertenang, jangan bergerak, hubungi nombor kecemasan (112, 000, 911) atau pergi ke hospital dengan segera. Ingat rupanya, gambar boleh membantu.

Ia bukan mahu memburu kamu. Ia guna bisanya untuk menangkap makanan atau melindungi diri, dan ia lebih suka bersembunyi. Lagi tentang keselamatan

Di mana di dunia?

Afrika Asia Eropah Amerika Utara Amerika Selatan Australia & Oceania

Berapa besar ia?

Berapa panjang ia?

lebih kurang sepanjang klip kertas

Berapa besar Brown recluse berbanding KAMU?

Hanya matematik dalam pelayar kamu. Tiada apa yang disimpan atau dihantar ke mana-mana.

Berapa laju ia?

Kura-kura darat kira-kira 0.3 km/j (0.19 mph)

Brown recluse kira-kira 0.8 km/j (0.5 mph)

Orang berjalan kira-kira 5 km/j (3.1 mph)

berguna untuk diketahui

Fakta

One brown recluse survived for over five seasons in captivity without any food at all.1

In 2001, more than 2,000 brown recluses were removed from a heavily infested home in Kansas, yet the four residents who had lived there for years were never harmed.1

When a leg is lost, the brown recluse does not grow a new one in later moults, unlike the huntsman spider.1

Brown recluses do not balloon, which limits how far they can spread across the landscape.1

Males move around more when hunting than females, which tend to stay near their webs.1

Pemecah mitos

Mitos: Brown recluses are common in California and the western United States, where they cause many bites.

Hakikat: The brown recluse has not established itself in California or anywhere outside its native range. Many reported bites there are misdiagnosed, and other spiders are often wrongly identified as brown recluses.1

Untuk pakar bisa

Nama saintifik: Loxosceles reclusa
Kumpulan: Labah-labah
Keluarga: Sicariidae2
Susunan: Araneae
Benua-benua: Amerika Utara
Anak: Each female produces several egg sacs between May and July, with about 50 eggs in each sac. The eggs hatch in about one month, and the young take about a year to reach adulthood.1
Bahaya kepada manusia: 3 / 5: Serius3

Dari mana fakta datang

Brown recluse spider (Wikipedia (CC BY-SA 4.0))
Loxosceles reclusa (iNaturalist): nama dan pengelasan.
Venom Wiki: tahap bahaya, saiz biasa dan anggaran kelajuan adalah penilaian kami sendiri. Lihat cara kami mengiranya: Cara kami menilai bahaya.

Setiap fakta di halaman ini ada nombor yang menunjuk kepada sumbernya. Jika kami tersilap, maaf, kami peminat haiwan, bukan jurnal sains. Beritahu kami di [email protected] dan kami akan betulkan.

Kala jengking lapar! Venom Wiki ialah projek seorang lelaki: percuma, tanpa iklan dan tanpa penjejak. Sedikit sumbangan membantu memastikannya terus dalam talian.Beri kala jengking makan