Nyob zoo ib tsoom niam txiv kwv tij neej tsa sawv daws.
Tus nab npawb ntawm kab laum nyob hauv lub ntiaj teb suav ntau dua 4,500 tab sis tsuas yog plaub hom no tau dhau los ua kab mob hnyav rau tib neeg. Nthuav qhov tseeb txog cov kab laum thiab kab laum yuav paub tom qab mus los ntawm cov lus qhia hauv kab lus no. Kab laum feem ntau hu ua roaches, tab sis tsuas muaj ib feem ntawm lawv nyob ib puag ncig tib neeg cov chaw nyob piv rau cov tsiaj qus. Kab laum yog ib pab pawg neeg taxonomic tseem ceeb, vim lawv cov yam ntxwv thiab kev nthuav dav. Yog li ntawd, tsab xov xwm no muab cov ntaub ntawv tseem ceeb ntawm cov kab laum thiab hais txog qhov txawv ntawm kab laum.
kab laum
Kab laum yog ib pawg kab ntau ntau yam nrog ntau dua 4,500 hom. Lawv raug cais raws li Txoj Cai: Blattodea thiab muaj yim tsev neeg. Muaj txog 30 hom ntawm lawv nyob ib ncig ntawm tib neeg thiab tsuas yog plaub ntawm lawv yog cov kab mob hnyav. Qhov tseem ceeb tshaj plaws ntawm cov kab laum yog tias lawv muaj peev xwm tiv taus kev puas tsuaj loj. Nyob rau hauv ib lo lus yooj yim, kab laum tsis tau ua tsis tiav ib qho ntawm cov kev puas tsuaj loj tshwm sim hauv ntiaj teb txij li thaum lawv pib 354 lab xyoo dhau los, nyob rau lub sijhawm Carboniferous. Lawv lub hauv paus ntawm kev ciaj sia los ntawm ntau dua 350 lab xyoo tuaj yeem piav qhia tau zoo siv lawv cov kev coj noj coj ua dav dav. Lawv lub qhov ncauj tau yoog rau txhua hom zaub mov, kom lawv tuaj yeem pub rau txhua yam uas muaj. Piv txwv li, cov kua nplaum nyob rau hauv lub stamp yuav zoo txaus rau ib tug kab laum ua zaub mov. Tsis tas li ntawd, lawv tuaj yeem muaj sia nyob tom qab dej hauv dej rau ntau tshaj li ib nrab teev thiab qee hom tuaj yeem mus yam tsis ua pa rau 45 feeb. Tsis tas li ntawd, kab laum tuaj yeem yoo mov ntau dua ib hlis yam tsis tas yuav tuag. Piv nrog rau feem ntau ntawm lwm cov kab, kab laum loj nrog txog 15 - 30 millimeters ntev lub cev. Qhov loj tshaj plaws sau tseg hom yog Australian loj heev burrowing cockroach nrog txog cuaj-centimeter ntev lub cev. Lawv txhua tus muaj lub cev dorso-ventrally flattened nrog lub taub hau me me. Lawv muaj ob lub qhov muag loj thiab ob lub kav hlau txais xov ntev. Tag nrho lub cev tsis nyuaj li ntau kab, tab sis thawj khub tis yog ib qho nyuaj thiab ob khub yog membranous. Lawv ob txhais ceg muaj coxae thiab claws rau kev tiv thaiv thiab lwm yam dej num. Kab laum tuaj yeem yog cov kab tsuag loj heev tsis yog rau cov khoom noj khoom noj xwb, tab sis kuj yog cov kab mob sib kis xws li mob hawb pob.
Dab tsi yog qhov txawv ntawm Roaches thiab Cockroaches?
• Kab laum kuj yog kab laum, tab sis tsuas yog hom tsiaj nyob ib puag ncig tib neeg qhov chaw raug hu ua roaches. Yog li ntawd, qhov sib txawv yog siab dua ntawm kab laum piv rau roaches.
• Kab laum ib txwm yog kab tsuag, thiab lawv yog ib feem ntawm ob peb txhiab hom kab laum.
• Feem ntau, lo lus roach yog siv nyob rau hauv Amelikas, xa mus rau American kab laum, Periplanataamericana.
