(4) Nematopogon taiwanella Kozlov, 2001

Nematopogon taiwanella Kozlov, 2001: 41, figs. 1–7 (TL: China, Taiwan, Nantou); Shao et al. 2008: 550 (checklist of Taiwan).

Diagnosis. This species is very similar to N. chalcophyllis but can be distinguished by the following characters: the valvar pectinifer of male genitalia has 32–34 pegs; the relatively wider uncus with straight lateral margins; the aedeagus has only one long apical cornutus; and the juxta has a pointed arrow-head. In addition, this species has a relatively narrow tergite VIII in the female genitalia (approximately 3.6 × as long as wide) and an almost straight hind margin.

Specimens examined. Not available in this study.

Distribution. China (Taiwan).

Remarks. This species is endemic to Taiwan, China. Adults can be collected by light traps in open forest areas (Kozlov 2001).