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Akutagawa was known for piecing together many different sources for many of his stories, and "The Spider's Thread" is no exception. He read Fyodor Dostoevsky's The Brothers Karamazov in English translation sometime between 1917 and 1918, and the story of "The Spider's Thread" is a retelling of a very short fable from the novel known as the Fable of the Onion, where an evil woman who had done ...
Tidarren sisyphoides is a species of spider in the family Theridiidae - the tangle web spiders. The male of this species is only ~1% the size of the female. At copulation, the male dies during insertion and remains attached to the female for more than two hours. However, the female does not eat her mate. The dead male is afterwards removed from ...
Theridiosoma gemmosum is a small spider. Females are 2–3 mm long, males smaller still at 1.5–2 mm. Females are 2–3 mm long, males smaller still at 1.5–2 mm. In both sexes, the carapace (upper surface of the cephalothorax ) is dark brown; the upper surface of the abdomen ( opisthosoma ) is silvery with variable dark lines and marks.
Spider silk structure: crystalline beta-sheets separated by amorphous linkages. Silks have a hierarchical structure. The primary structure is the amino acid sequence of its proteins (), mainly consisting of highly repetitive glycine and alanine blocks, [4] [5] which is why silks are often referred to as a block co-polymer.
The spider's rear legs are used to hold these rays while the front legs hold onto an extra line of thread, which is used to pull the web into a cone and keep it under tension. When potential prey nears the web the spider releases the tension in the web, causing it to slam into the prey. The spider then bites the prey, and wraps it in silk. [5]
In Press. Molecular insights into the phylogenetic structure of the spider genus Theridion (Araneae, Theridiidae) and the origin of the Hawaiian Theridion-like fauna. Zoologica Scripta. Aviles, L., Maddison, W.P. and Agnarsson, I. 2006. A new independently derived social spider with explosive colony proliferation and a female size dimorphism.
The golden silk orb-weaver is named for the yellow color of the spider silk used to construct these webs. Yellow threads of their web shine like gold in sunlight. Carotenoids are the main contributors to this yellow color, but xanthurenic acid, two quinones, and an unknown compound may also aid in the color. [3]
These are formed in the same way as full spanning-thread webs, but have only three radii so that they appear triangular. The spanning threads in both circular and triangular spanning-thread webs are attached in such a way that when they catch a prey item (usually a moth), the thread detaches at one end and the prey ends up dangling until hauled ...