Polana (Polana) thugana DeLong & Triplehorn 1979, comb. nov.

Polana (Polana) thugana DeLong & Triplehorn, 1979 comb. nov. Polana (Nihilana) thugana DeLong & Triplehorn, 1979: 181. Remarks. Similar to P. onara, the aedeagus of P. thugana presents a pair of long basal processes, originally described as following: “Aedeagus with a pair of long processes arising at base of shaft which extend caudally half the length of shaft where they are bent abruptly dorsally, narrowed and tapered to slender apices” (DeLong & Triplehorn 1979: 188, figs 66–70). Therefore, this species is transferred to the subgenus Polana. DeLong (1979) described five species of Polana, placing them in the subgenera Bulbusana, Nihilana, Polana, and Hobemanella. The only species placed in the subgenus Polana, P. villara, from Argentina, lacks processes near base of aedeagus. Thus, the following new combination is proposed: