The Family Cryptocercidae rabe-rabe ne na haraji na kwari da aka fi sani da "kyanko masu launin ruwan kasa" ko "kyank'osai masu launin ruwan kasa". Wadannan kwari suna cikin tsari na Blattodea, wanda ya hada da sauran nau'in kyankyasai. Family Cryptocercidae ya haɗa da ƙanana, kyankyasai masu launin ruwan kasa waɗanda galibi ana samun su a cikin dazuzzuka, zuriyar ganye, da sauran wurare makamantan haka. Wani lokaci ana ɗaukar su kamar kwari, amma gabaɗaya ba su zama ruwan dare a cikin gidajen ɗan adam ba kamar sauran nau'in kyankyasai.