Protrellus künckeli (Galeb, 1878) Travassos, 1929
Synonymy.—Oxyuris künckeli Galeb, 1878; Protrellina künckeli (Galeb, 1878) Chitwood, 1932 [Chitwood, 1933].
Natural hosts.—Periplaneta americana, Egypt? (Galeb, 1877, 1878.) [Chitwood (1932) questioned the determination of this host because he failed to find this nematode in a large number of specimens from U.S.A. and China.] Brazil (Pessôa and Corrêa, 1926).
Periplaneta australasiae, Brazil (Pessôa and Corrêa, 1926).
Protrellus manni (Chitwood, 1932) Chitwood, 1933
Synonymy.—Protrellina manni Chitwood, 1932.
Natural host.—Aglaopteryx diaphana, Cuba (Chitwood, 1932).
Protrellus phyllodromi (Basir, 1942) Basir, 1956
Synonymy.—Protrellina phyllodromi Basir, 1942.
Natural host.—Blattella humbertiana, India, Aligarh (Basir, 1942): Found in the rectum.