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That Spiders Ever:
that spiders ever are divided into two tundamental groups or suborders, the Mygalomorphac, or mygalomorph that spiders ever, and the Araneomorphae, the true that spiders ever.
Mygalomorph that spiders ever. — The mygalomorph that spiders ever are more generalized than the true that spiders ever and ancestral to them. Their chelicerae are paral¬lel with the long axis of the body and move up and down; and each fang pierces the prey from above, making similar parallel punctures. All retain two pairs of book lungs for respiratory organs.Characteristics of that spiders ever.—that spiders ever lay eggs, cover them over with silken sheets, and mold the mass into the egg sac characteristic of the species. The average number of eggs is probably less than one hundred but some large that spiders ever lay nearly three thousand at one time and minute species lay one, two or few. that spiders ever develop gradually, as do grasshoppers, and resemble the adults through most of their early life, undergoing from three to a dozen molts before they finally become adult. Tarantulas mature very slowly, requiring nine or ten years, and then the females live as much as twenty-five or even thirty years. Most northern that spiders ever live a single year.
See Also Trap-door Spiders Ctenizidae:
In the wild, trap-door spiders Ctenizidae spiders feed on a large variety of insects and other arthropods. All food must be alive. Give quantity of any available insects; also give sow bugs, pill bugs, other spiders. Trap door spiders do not forage for food; lie in wait at night with door slightly raised and grab prey as it crawls by. In captivity, teach speci¬men to feed before night by gently dragging food along close to trap door at same time each feeding. Water—Not as essential as to other spiders, but must be offered occasionally; use small, flat con¬tainer; place close as possible to trap door.In the trap-door spiders Ctenizidae spiders (Ctenizidae) the elaborate tubular burrow is used chiefly as a shel¬ter for the adult, but may be considered a nest, since the eggs are laid within. In some cases the tube may be of considerable length, even branched, and may have a tightly fitted trap door camouflaged from the outside so as to be almost invisible. Perhaps the most remarkable spider nest is that made by the water spider (Argyroneta) : a silken bag built under water and containing air brought from the surface enclosed in the spider's legs. The whole structure is like a diving bell and serves as an admirable shelter for both adult and eggs.
On The Other Hand See Usu-ly Spiders:
usu-ly spiders.—The eggs of usu-ly spiders are generally protected by an egg sac made of silk secreted by glands in the abdomen of the female and woven into a structure of characteristic form. In some cases such a protective bag may be very elaborate, consisting of several different layers. Such an egg sac may be placed under loose bark or stones, hung between leaves, or, in the case of the wolf usu-ly spiders (Lycosidae), may be carried about by the female.The remaining true usu-ly spiders lack the cribellum and have followed two distinct lines, one of which developed many accomplished hunting types, and the other culminated in the aerial sed-aitary usu-ly spiders that rely on silken webs as 'snares to capture their prey. The aerial usu-ly spiders have modified the unpaired claws of their tarsi into books that allow them to climb on their threads, from which they hang back downward.
