Every tetraeffective cause of mortality and survivorship negatively and positively affects mortality and negatively and positively affects survivorship. There is some scientific evidence of tetraeffective causes of mortality and survivorship, and strong rationales suggest that every cause of mortality and survivorship is tetraeffective. However, until now, tetraeffective causes of mortality and survivorship have remained unidentified, unnamed, unrecognized, unclear, misconceived, unspecified, and unexplained. Here I show that every tetraeffective cause of mortality and survivorship combines corresponding at least one mortacause and at least one vitacause; mortacause refers here to a cause-specific component that positively affects mortality and negatively affects survivorship, and vitacause refers to a cause-specific component that positively affects survivorship and negatively affects mortality. Best-fitting specifications ∂Y/∂(Xp) = a + bXp such that sign(a) = -sign(bXp) of respective tetradic effects of age, lifespan, contemporary aggregate size, lifespan aggregate size, and historical time on mortality and survivorship of humans and medflies reveal here mortacauses and vitacauses of respective tetraeffective causes of mortality and survivorship; in these specifications components a and bXp indicate a mortacause and a vitacause of a tetraeffective cause X of mortality or survivorship Y. Thus mortacauses, vitacauses, and tetraeffective causes of mortality and survivorship are identified, named, recognized, elucidated, conceptualized, specified, explained, and demonstrated.