Kalmar "Superclass Agnatha" tana nufin ƙungiyar taxonomic na kifin jawless wanda ya haɗa da fitilu da hagfish. Kalmar “superclass” ana amfani da ita a ilmin halitta don komawa ga babban nau'i a cikin rabe-raben rayayyun halittu, matsayi sama da "aji" da ƙasa "subphylum." Agnatha superclass yana da alaƙa da rashin jaws da fins ɗin da aka haɗa biyu, da kasancewar kwarangwal na cartilaginous.