| 释义 |
Latrodectus mactans
Thesaurus| Noun | 1. |  Latrodectus mactans - venomous New World spider; the female is black with an hourglass-shaped red mark on the underside of the abdomenblack widowspider - predatory arachnid with eight legs, two poison fangs, two feelers, and usually two silk-spinning organs at the back end of the body; they spin silk to make cocoons for eggs or traps for preygenus Latrodectus, Latrodectus - venomous spiders |
EncyclopediaSeeblack widow spiderLatrodectus mactans
Latrodectus [lat″ro-dek´tus] a genus of poisonous spiders. L. mac´tans is the black widow spider. See also spider bite.Latrodectus mac´tans a species found in the United States; commonly known as the black widow. Its bite may cause severe symptoms or even death. (For first aid, see spider bite.)La·tro·dec·tus mac·'tansthe black widow spider, a venomous jet-black spider found in protected dark places; it is especially common in the southern U.S.; the full-grown female (slightly more than 1 cm long) has a brilliant red dumbbell- or hourglass-shaped mark on the ventral aspect of the abdomen; her bite may be extremely painful, producing a syndrome mimicking an acute abdominal crisis; some deaths, though rare, have been reported, particularly in small children; the male spider lacks the hourglass mark and is not venomous.A venomous spider indigenous to North America—most bites occur in California, most commonly in summer. The black widow spider measures 13 mm in length with a leg spread of 40 mm; it bites with its anterior fangs and may be fatal in very young children and older adults
Management Supportive—topical cleansing, ice, aspirin, opiate analgesics, hot baths, mild sedation, bed rest; for muscle spasms, calcium gluconate, methocarbamol or phenadrine; for hypertensive crises, short-acting antihypertensives; antivenin-Lyovac may be indicated in some patientsLatrodectus mactans
Related to Latrodectus mactans: Latrodectus hesperus, Latrodectus variolusSynonyms for Latrodectus mactansnoun venomous New World spiderSynonymsRelated Words- spider
- genus Latrodectus
- Latrodectus
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