YDragonfly vs Damselfly
Ob leeg dragonflies thiab damselflies muaj nyob rau hauv Order: Odonata ntawm chav kawm: Insecta sib koom ib tug xov tooj ntawm nta. Txawm hais tias lawv zoo sib xws, cov kev sib txawv tseem ceeb yog qhov tseem ceeb hauv kev faib lawv ua ob pawg. Los ntawm kev saib ntawm lawv, nws tsis yog yooj yim los txheeb xyuas seb nws yog kab laug sab lossis tus damselfly, raws li lawv cov kav hlau txais xov feeb, ob lub qhov muag loj, ob khub ntawm tis nrog cov hlab ntsha feeb, thiab lub plab mog yuav luag tib yam hauv ob qho tib si. Yog li ntawd, nws yog ib qho tseem ceeb kom paub qhov txawv ntawm cov kab zoo sib xws.
Dragonfly
Dragonflies yog kab predatory evolved 300 lab xyoo dhau los, uas yog ua ntej evolution ntawm flowering nroj tsuag. Lawv muaj txog 3 - 10 centimeters ntev lub cev, thiab qhov loj tshaj plaws saud dragonfly ntsuas yuav luag 20 cm. Ob khub ntawm membranous tis tsis zoo sib xws; rear tis yog loj thiab muaj ib tug dav puag tshaj lub pem hauv ntej tis. Lawv cov tis yog qhov tseem ceeb heev hauv kev txheeb xyuas lawv li dragonflies, nrog rau kev sib txawv ntawm cov tsiaj hauv lawv. Dragonflies khaws lawv cov tis nyob rau hauv kab rov tav los yog downwards thaum lawv so. Tsis tas li ntawd, cov venations ntawm tis yog tshwj xeeb rau txhua hom ntawm dragonflies. Txawm li cas los xij, lawv muaj lub cev khov kho nrog lub plab khov kho. Lub qhov muag loj yog nyob ze rau ib leeg, yuav luag sib cuag nrog ib leeg nyob rau saum lub taub hau. Cov txiv neej pw hauv nruab nrog cev yog ib khub ntawm qhov quav appendages, hu ua claspers. Txiv neej hloov cov phev mus rau hauv poj niam accessory genitalia, thiab nws tuav nws scruff kom nyob rau hauv tandem. Cov txheej txheem nthuav dav thiab tshwj xeeb no xaus nrog cov phev hloov thaum tus poj niam curls nws lub plab. Lawv cov qe yog puag ncig thiab txoj kab uas hla yog 0.5 cm ib. Dragonfly nymphs ua pa ntawm lawv lub qhov quav tracheal gills, thiab lawv lub cev yog luv thiab loj. Tom qab kwv yees li 15 moults, tus nymph dhau los ua neeg laus, uas nyob tau li ob mus rau peb lub lis piam.
Damselfly
Evolved ua ntej 300 lab xyoo, lawv kuj yog fossils nyob. Damselflies feem ntau yog hais txog 3 - 8 centimeters ntev, tab sis muaj cov ntaub ntawv ntawm ntau tshaj 10 cm ntev damselflies. Qhov tseeb nthuav txog lawv cov tis yog tias ob khub zoo sib xws hauv cov duab thiab loj. Tsis tas li ntawd, lawv khaws lawv cov tis kaw thiab nce saum lub plab thaum lawv so. Damselfly lub cev feem ntau ntev thiab slender. Lawv muaj ob lub qhov muag sib nrug ntawm ib leeg, nyob ntawm ob sab ntawm lub taub hau. Cov txiv neej muaj ob khub ntawm qhov quav appendages los hloov cov phev mus rau poj niam. Cov poj niam muaj kev ua haujlwm ovipositors. Lawv siv sij hawm ntau heev ua ntej mating; Cov kws tshawb fawb ntseeg tias poj niam tab tom ntsuas tus txiv neej lub cev lub sijhawm no ua ntej tau txais phev los ntawm nws. Damselfly qe yog cylindrical thiab txog ib centimeter ntev. Damselfly nymphs yog ntev thiab slender thiab lawv ua pa los ntawm caudal gills. Nymph dhau los ua neeg laus tom qab ob peb moults, thiab cov neeg laus muaj lub neej luv dua piv rau nymph. Txawm li cas los xij, thaum kub kub, cov neeg laus tuaj yeem nyob tau txog rau lub hlis.
Dab tsi yog qhov txawv ntawm Dragonfly thiab Damselfly?
– Ob leeg dragonflies thiab damselflies hloov zuj zus ua ntej 300 lab xyoo, thiab yog cov fossils nyob thiab muaj cov zaub mov carnivorous.
– Dragonflies me ntsis loj dua, thiab muaj lub plab uas ruaj khov thiab luv. Tab sis, damselflies me me, thiab lub plab yog ntev thiab slender.
– Dragonflies khaws lawv cov tis mus rau pem hauv ntej los yog kab rov tav positioned, whereas damselflies cia lawv kaw thiab upwards.
– Tsis tas li ntawd, ob khub ntawm tis nyob rau hauv dragonflies tsis sib xws, thaum cov damselflies zoo sib xws.
– Ob lub qhov muag nyob ze ntawm kab npauj, thaum cov sib nrug ntawm ib leeg hauv damselflies.
– Qe ntawm dragonfly yog puag ncig, tab sis cov cylindrical nyob rau hauv damselfly.
– Cov nymphs ntawm dragonflies luv dua thiab loj, thaum damselfly nymphs ntev thiab slim.
– Sib nrug ntawm qhov sib txawv ntawm qhov pom no, lawv cov kab mob sib deev thiab gills ntawm nymphs kuj txawv ntawm cov pob txha muaj sia.
