Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae Author FIBIGER, MICHAEL text Zootaxa 2010 2010-08-31 2583 1 1 119 http://dx.doi.org/10.11646/zootaxa.2583.1.1 journal article 10.11646/zootaxa.2583.1.1 1175­5334 10094382 Fustis gregerseni Fibiger , new species ( Plate 6 , figure 4; male genit. plate 15, figure 6) Material examined. Holotype : male, W Thailand , Uthai Thani Distr. , Khao Nang Rum , 400 m , 26– 27.i.1987 , leg. M.G. Allen , BM 1986 – 300 , genit. prep. 3765 M. Fibiger , coll. BMNH . Diagnosis. Imago (external). Wingspan: 14.5 mm (apo.). Head, patagia, anterior part of tegulae, prothorax, basal part of costa, triangular patch of medial area, small patches of lower subterminal area, and terminal area, including fringes: black. Forewing: long and narrow, with pointed apex, beige ground colour suffused with few light brown scales. Abdomen: dark grey, with dorsal tuft on basal segment. Crosslines: untraceable, terminal line weakly marked by black interneural dots. Reniform stigma: beige, ovoid, black outlined. Hindwing: beige, with narrow brown terminal line with indistinct discal spot; fringes beige. Underside: forewing grey brown; hindwing grey, with discal spot. Male genitalia. Tegumen: long, laterally narrow; dorso-laterally broader, platelike. Vinculum: two branched; centre one barlike; posterior one branchlike, not curved. Saccus: relatively long; broadly V-shaped. Valvae: slightly asymmetrical. Ampulla: bilobed; slightly asymmetrical; lobes tapered: dorsally broad fingerlike; ventrally broad and rounded; outer edge curved throughout (apo.) Digitus: small, broad, quadrangular. Anellus plate: basally asymmetrical, platelike; upwards extremely long, free, and subapically sharply angled, before tapered and upturned, pointed tip; heavily sclerotised rodlike structure; all free structures clothed with stout setae (apo.). Phallus: coecum relatively long and smoothly rounded; broadest at large, triangularly process at tip; almost straight (apo.). Vesica: armed with a small, slightly curved, heavily sclerotised rectangular plate (apo.). Differential diagnosis. F. gregerseni differs from other Fustis species in: - large size; - shape of ampulla, especially rounded very wide and long ventral arm; - long, apically upturned, pointed anellus; - phallus with large and triangular process at tip; and - vesica with rectangular heavily sclerotised plate. Distribution. F. gregerseni known only from W Thailand .