Tube Web Spider
The Tube Web Spider (Segestria florentina), also known as the Cellar Spider (both of these names are not considered specific names for this species), is a species of arachnid found in Europe. It was originally found in the Mediterranean region as far east as Georgia. It can be found in several large British towns where they were most likely introduced via seaports since at least 1845. In places such as Bristol, Cornwall and Gloucester, it prefers south-facing walls for its habitat. It has also been found in Argentina, Australia and several Atlantic islands, where it was probably introduced.
The female can reach a body length of 0.86 inches while the male reaches a length of 0.60 inches. It is much darker in color than other species of the same genus. While young spiders can be more grayish, adults are uniformly black. Sometimes a green metallic shine is portrayed in the adult. The fangs reflect a striking green as well. Sexes are similar. Adults occur from June to November.
The web is tubular and is found often in building cracks. Six or more silk lines radiate from the web, and the spider waits at the entrance, touching the lines with her frontal six legs. Any prey that triggers the lines get caught, and the spider will immediately captures the food and returns to her retreat to feast upon it. Their diet is mostly nocturnal insects such as moths and cockroaches. It despises woodlice. It will bite bees and wasps at the head end so the sting will face away from the spider.
The female deposit’s the eggs inside the tube web. Sometimes the female will die once the spiderlings have hatched. Spiderlings will eat the mother if she dies. The spider is easily lured to the entrance by gently touching the triplines with a stick in the evening or at night. The bite of this spider can be quite painful. It feels somewhat like a deep injection, and the pain can last for several hours. The venom contains two neurotoxins and one insecticide which reduces the rate and amount of sodium inactivation.