Kalmar "Genus Amphisbaenia" tana nufin rukuni na dabbobi masu rarrafe waɗanda kuma aka sani da tsutsotsin tsutsa ko amphisbaenids. An siffanta su da silindrical, elongated jikinsu da ikon su na motsawa a bangarorin biyu, kama da tsutsa. Sunan "amphisbaenid" ya fito ne daga kalmomin Helenanci "amphis," wanda ke nufin "hanyoyi biyu," da "bainein," wanda ke nufin "tafi," yana nufin ikon dabbar dabbar ta motsa ta hanyoyi biyu. Ana samun wannan rukuni na dabbobi masu rarrafe a sassa daban-daban na duniya, ciki har da Afirka, Turai, Asiya, da Amurka.