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Common house spiders are variable in color from tan to nearly black, frequently with patterns of differing shades on their body. [3] Females are generally between 5 and 6 millimetres (0.20 and 0.24 in) long, and males are generally between 3.8 and 4.7 millimetres (0.15 and 0.19 in) long. [ 3 ]
Latrodectus mactans, known as southern black widow or simply black widow, and the shoe-button spider, [citation needed] is a venomous species of spider in the genus Latrodectus. The females are well known for their distinctive black and red coloring and for the fact that they will occasionally eat their mates after reproduction.
Latrodectus geometricus, commonly known as the brown widow, [2] [3] brown button spider, grey widow, brown black widow, [3] house button spider or geometric button spider, is one of the widow spiders in the genus Latrodectus. As such, it is a 'cousin' to the more infamous Latrodectus mactans (black widow).
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The egg sacs of A. pennsylvanica resemble the Agelenopsis naevia eggsacs – a large conical egg sac, in which the egg mass is enclosed in a thin, silk sac covered by a substantial layer of debris encased in silk (the eggs are still susceptible to parasites). The number of eggs in an egg sac is highly variable from 18 to 236 eggs. [9]
The egg sacs are about 5-12mm in diameter and are suspended by threads inside the brooding chamber. Each egg sac contains 94 eggs on an average but the numbers can range from 34 to 208 eggs. [7] The spiderlings will emerge from their chorion 18 days after egg production, and remain within the egg sac. After the first moult, the spiderlings will ...
The Australian funnel-web spider is considered one of the world's deadliest arachnids. Its venom can kill a human within 15 minutes, Dr. Robert Raven, curator of arachnids at Queensland Museum ...
The egg sac is off-white, tan, or blue in color. After this carrying period, the egg sac is torn and spiderlings emerge. These spiderlings are still carried by their mother for 3 to 24 days. The size and weight of these egg sacs make it harder for the female to attack prey and avoid predators. Occasionally, female shore spiders drop their egg ...