Plecoptera yog ib qho kev txiav txim ntawm kab, feem ntau hu ua stoneflies. Qee tus 3, 500 hom tau piav qhia thoob ntiaj teb, nrog cov tsiaj tshiab tseem raug tshawb pom.
Yam xaj dab tsi yog stoneflies?
Stonefly, (order Plecoptera), ib yam ntawm 2,000 hom kab, cov neeg laus uas muaj cov kav hlau ntev ntev, tsis muaj zog, zom qhov ncauj, thiab ob khub membranous tis. Cov stonefly muaj qhov loj ntawm 6 mus rau ntau tshaj 60 mm (0.25 txog 2.5 ntiv tes).
Thaum twg stoneflies evolve?
Kev sib txawv ntawm cov pob zeb niaj hnub niaj hnub no yog Mesozoic keeb kwm (252 txog 66 lab xyoo dhau los). Taxonomically, qhov kev txiav txim Plecoptera muab faib ua ob pawg: Antarctoperlaria (los yog "Archiperlaria") thiab Arctoperlaria.
Puas pob zeb muaj 3 tails?
tus nymphs muaj ceg ntev, kav hlau txais xov luv, thiab muaj 3 tails. Qee cov nymphs muaj 2 tails, tab sis koj tuaj yeem paub tseeb tias 3-tailed nymph yog ib tug mayfly. 2- Yog tias nws muaj 2 tails, saib ob txhais ceg. Mayflies muaj ib tug nuv ntawm lawv ob txhais ceg thaum stoneflies muaj ob hooks ntawm lawv ob txhais ceg.
Pob stoneflies ya?
Nymphs zoo li lub pob zeb loj yoov nyob hauv tus dej ntwsntev li peb xyoos ua ntej lawv mus rau cov neeg laus tis. … Lawv zoo nkauj heev rau trout hauv ntau qhov ntau thiab tsawg, yuav luag txhua xyoo. Raws li lub pob zeb ya nymphs loj tuaj lawv yuav tsum tau hla ib thaj chaw loj dua.
