Diagnosis. This species differs externally from most species of the angulifasciella group by its small size, light collar, straight non-metallic fascia, and absence of hair-pencil in male. It can possibly be confused with E. mahalebella, in which case the genitalia should be examined. Male genitalia are immediately recognised by the width and the dorsal spinose process of the aedeagus. Female genitalia are easy to separate from mahalebella by shape and position of signa.
Description. Male. Forewing length 1.96 — 2.12 mm (2.05 ± 0.07, 6), wingspan 4.4 — 4.7 mm. Head: frontal tuft yellowish orange to orange brown; collar slightly lighter. Antennae with 30 — 33 segments (32 ± 1.2, 5). Thorax and forewings brownish black with a medial, almost straight fascia, dull white, not shining. Hindwing without hair-pencil or costal bristles.
Female. Forewing length 1.68 — 2.04 mm (1.89 ± 0.13, 8), wingspan 3.7 — 4.6 mm. Antennae with 24 — 26 segments (24.9 ± 0.8, 8).
Male genitalia. Capsule length 197—240 µm (3), wider than long. Tegumen distinctly produced into a rounded pseuduncus. Gnathos divided into short distal element, and basal part with serrate margin. Valva length 167 — 184 µm (3), relatively broad, inner margin almost straight, but slightly concave below pointed tip. Aedeagus 261—287 µm (3), distinctly longer than capsule, relatively broad; with pair of single or bifid carinae and a single dorsal projection with many spines.
Female genitalia. T7 with 4 — 6 scattered setae along posterior margin. T8 with two lateral patches of scales and 3 — 5 setae. Anal papillae with 7 — 18 setae. Vestibulum with incomplete vaginal sclerite with an indistinct ventral projection, without spiculate pouch. Corpus bursae 460 — 630 µm, completely covered by pectinations, especially dense near vestibulum; signa similar, with only slight differences in length, 197—326 µm (254.7 ± 47.5, 7), 2.6 — 3.1 x as long as wide. Ductus spermathecae with 2 — 3 convolutions.
Larva. Pale green, according to Szôcs (1957).
Hostplant: Filipendula vulgaris Moench. The record in France is from an area where this host is unknown (Dupont 1990), so that it probably feeds there on another host, possibly another rosaceous herb. Mine. Egg on leaf-underside. Mine narrow gallery, often following leaf-margin; early mine filled with brown dispersed frass, later black dispersed frass leaving clear margins.
France: Van Nieukerken et al. 2006. Otherwise still only known from eastern Austria and central Hungary.
Life history. Probably bivoltine. Larvae in June, July and August-September, adults in May and again late June to July.
This taxonomic description is based on Van Nieukerken (1985) and Van Nieukerken et al (2010).