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Name : Diving bell wanderer or body of water spider ( Argyroneta aquatica )
Where it live : Europe and Central and Northern Asia , with a disjoined subspecies in Japan
Diving bell spiders create underwater webs that they transfer air from the surface to via hairs on their bodies.
What it corrode : Other aquatic invertebrate and small Pisces
Why it ’s awful : As its name suggests , the diving bell wanderer lives almost completely underwater ; it ’s the only wanderer to do so . It still needs to breathe airwave though , so it survives by create a diving bell — spinning a World Wide Web between underwater plants — and then carries air from the surface down to its web via its hairy physical structure .
" It has developed an amazing adaptation for this aquatic life,“Craig Macadam , conservation theater director of the U.K. invertebrate charity Buglife , severalise Live Science in an electronic mail . " The spider has legion water - repellent hairs over its body which pin down atmosphere from the urine surface . The spider then spins a silk anatomical structure where it forms an melodic phrase house of cards , which it utilise in the same way as a diving bell . "
The bubble is lucubrate until the wanderer can meet within . The chambers offemales are double the size of those made by male , as they take it to serve well as a breast feeding chamber , too . The air in the diving bell is on a regular basis refreshed , and the spider pack a bubble of water around with it , give it a silvery coloration .
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outstandingly for spiders , manly diving bell spiders are large and heavy than female . A2003 studyin the journal Evolutionary Ecology Research look at why this might be and come up that for the more mobile males , growing larger — and have longer front legs — meant they could move more expeditiously underwater . By line , the sizing of females was constrained by the need to build a larger air Alexander Melville Bell in which they depend after their young , and the energetic costs associate with more frequently transferring fresh melodic phrase from the water open to the bell .
A follow - upstudy published in 2005 in The Journal of Arachnology by the same authors also break an interesting insight into the spiders ' conjugation doings : Females come out to opt mating with large males , despite the hefty peril involve .
The team discover that gravid male occasionally eat the female person in a case of converse sexual cannibalism . However , their experiments also show that prominent males and females would also toss off small Male .
