Four new species of the genus
Archilina Ax 1959 are described from tropical areas:
A. euglypta n. sp. And
A. batiae from Red Sea;
A. stylifera n. sp. And
A; opisthobursa n. sp. From the Caribbean (Puerto Rico). The karyotypes of all species are given : three of them have karyotypes derived from the basic set of the family Monocelididae. A sister-species relaionship is proposed for the Caribbean species based on the backward position of the bursa. Because of this feature, the genus diagnosis is modified. The two Caribbean species are considered as a separate evolutionary line within the genus
Archilina.