Acalyptris platani (Müller-Rutz, 1934) van Nieukerken, 1986

Description. Male. Forewing length 2.4–2.5 mm, wingspan 5.2–5.4 mm. Head: frontal tuft yellowish, on vertex fuscous, two areas clearly separated; collar very inconspicuous, as vertex; scape and pedicel white. Antenna with ca. 34 segments. Thorax yellowish white to brown. Forewing basal 1/4 yellowish brown, followed by broad yellowish white fascia to 1/2; distal part of wing brown, yellowish white opposite tornal and costal spots, sometimes united in a second fascia; cilia silvery white, cilia line distinct. Underside forewing basal 2/3 (in rest in contact with hindwing androconial patch) pale, with very few elongate brown scales only, distal third brown. Hindwing very broad at base, clearly cuspidate towards tip; costal bristles present; upper surface of basal 2/3 covered with a thick indumentum of white raised special scales, interrupted along midline by a distinct, straight, longitudinal furrow, devoid of scales; costa with a row of short yellowish brown hair scales instead of cilia. Underside white. Abdomen with yellow inconspicuous anal tufts.
Female. Forewing length 2.3–2.4 mm, wingspan 5.0–5.4 mm. Antenna with 27–29 segments. Forewing underside pale grey-brown, normally covered with scales. Hindwing normal, without special scales.
Male genitalia. Measurements: see Table 3. Vinculum anteriorly and posteriorly concave. Tegumen rounded, forming obtuse pseuduncus; uncus band-shaped, with indistinct central process, with pair of setae; gnathos with long, pointed central element. Valva at base with long inner process, subterminally with inner process on dorsal surface, apex rounded. Transtilla without transverse bar. Aedeagus with ventral carinae ending in forked lobes, tightly fused to ventral process; pair of lateral, pointed carinae present; vesica with numerous small cornuti and one large, serrate cornutus.
Female genitalia. T8 with few scales and setae only. Anal papillae with 19–21 setae. Vestibulum with elaborate sclerotisations, partly serrate and densely covered with pectinations. Total bursa length ca. 765μm. Corpus bursae elongate, without pectinations, with very narrow and long reticulate signa (length ca. 420–450 μm), margins crenate. Ductus spermathecae with 2 convolutions and long and conspicuous vesicle.
Final instar larva. Head capsule ca. 355–390 μm wide. Mandibular cusps blunt. A9 with 2 pairs of setae. Integument covered with extremely short microtrichia (ca 1μm long), absent on A9 and 10. Otherwise as group description.