Archithosia (Acanthosia) flavifrontella Eq.

1) Archithosia (Acanthosia) flavifrontella (Strand, 1912) species group ♂. Ala valvae pear-shaped (see Remarks below) with thick process (cp in Fig. 6A) in middle of dorsal margin (according to Birket-Smith (1965: 21), in his description of A. flavifrontella: “ala valvae bifurcate with unequal brances [sic] from about the middle”). In addition: rounded processus basalis plicae (pb in Fig. 6A); supravalva merging from basis valvae very close to ala valvae; valvellae slender. ♀. Lamella postvaginalis concave, without median swellings (unlike tryphosa species group); ductus bursae long and slender (Figs. 7A, 7C; in brevis sp. nov. shorter, Fig. 8). Remarks: an additional shorter process “arising from near base of sacculus”, as diagnosed by Krüger (2015: 28) for the whole subgenus Acanthosia, is absent in this species group. Included species (with geographical range) Archithosia (Acanthosia) flavifrontella (Strand, 1912) (Nigeria, Equatorial Guinea, Gabon, Uganda) Archithosia (Acanthosia) oblonga sp. nov. (Gabon) Archithosia (Acanthosia) brevis sp. nov. (Gabon)