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Tetragnatha extensa is a species of spider found across the Northern Hemisphere. It has an elongate body, up to 11 mm (0.43 in) long, and adopts a straight line posture when alarmed. It has an elongate body, up to 11 mm (0.43 in) long, and adopts a straight line posture when alarmed.
Metepeira labyrinthea, the labyrinth orbweaver, is a spider, with thin legs and a round, bulbous abdomen It is a member of the genus Metepeira in the family Araneidae. The female’s length is 5.3 mm, its carapace 2.3 mm, abdomen 3.3 mm, and extended legs 18.4 mm. [1] The carapace is brown or gray, and the abdomen is dark with a white pattern. [2]
Another morphological feature of A. labyrinthica is the spider's venom apparatus. Showing many similarities with the species Loxosceles intermedia, the venom glands of A. labyrinthica generally consists of paired structures located in the spider's abdomen. [4] These paired structures interact with two ducts that lead into the spider's fangs. [4]
The spiders are most often observed in railway tunnels and mines since these are more likely to be visited by humans. The young spiders are, after several instars (and in contrast to the adults), strongly attracted to light [ 2 ] —probably an evolutionary adaptation which ensures the spread of the species to new areas (see Life cycle for ...
Now, however, it appears that non-orb spiders are a subgroup that evolved from orb-web spiders, and non-orb spiders have over 40% more species and are four times as abundant as orb-web spiders. Their greater success may be because sphecid wasps , which are often the dominant predators of spiders, much prefer to attack spiders that have flat webs.
Nursery web spiders have a one-year annual cycle in southern Europe. They grow in summer, hibernate in winter, reach adulthood in spring, and reproduce and then die in autumn. Their offspring are sexually mature in the following spring. Spiders from the north have a two-year cycle, having to go through two hibernations before reaching sexual ...
Micrathena gracilis is a spider in the family Araneidae (orb-weavers), [1] commonly known as the spined micrathena [2] or castleback orbweaver. [3] This spider spins a moderately large (can be about 20 cm long in diameter) and very tightly coiled web. The spiders themselves are small and can be found to be anywhere from 4.2 mm to 10.8 mm long. [4]
Stegodyphus dumicola, commonly known as the African social spider, is a species of spider of the family Eresidae, or the velvet spider family. It is native to Central and southern Africa. This spider is one of three Stegodyphus spiders that lives a social lifestyle (S. lineatus, S. mimosarum, and S. dumicola). This spider has been studied ...