ws |
fw |
flight |
time |
10-14 |
5.2-6.5 (4) |
Jul-Aug |
night, to light |
lfp |
habitat |
distribution |
status |
oak (Quercus spp) |
woodland |
S.E |
common |
Female genitalia
The ovipositor is naturally arranged so that A8 forms a narrow (in the anteroposterior plane) hexagonal "ring" and the AP are laterally compressed (broad in the dorsoventral plane). Considerable distortion occurs when the specimen is set*, this resulting in an obviously transverse OP and an appearance that the AP are broad in the transverse plane. PA 1.5-2xOP; A8/9 ISM short. A8 sclerotisation confined to lateral plates which are naturally more or less dorsoventral with the AA borne on the dorsal margin of these plates; these compress to form the lateral components of the OP and the AA then appear laterally; AA very short ~1xOP; dorsal plate of A8 hardly sclerotised. The ostium occupies the whole length of the ostial plate; its anteroventral margin being formed by a relatively weakly sclerotised narrow band connecting the two lateral plates at the AM. The antrum / posterior section of the DM is sclerotised for ~2xOP, and narrows rapidly from the ostium (it seems a bit arbitrary whether the whole of this section is the antrum or just the part over which it narrows, or that it is all DB and there is no antrum). Dense bilinear spiculation for <½ length of DB. Tail sclerotisation runs through the centre of the antrum between the two spiculate lines (and with a relatively weakly sclerotised connection to them so it probably is flanked linear) and continues into the first loop for a length anterior to the spiculate line almost as long as the spiculate lines; second loop hyaline. CB simple ovoid containing a moderate thorn with a broad narrow base plate and a curved spike ~as long as the base plate is broad. *the key depends on determining that the ostium is in a V-shaped notch - but I think this needs amending in view of this distortion |
Female genital key: Signum with base plate as broad as the spike is long. C.ibipennella and C.betulella are very similar. The only consistent differences I can suggest are that in C.ibipennella the ostial plate is less transverse with the anterior apophyses about as long as the ostial plate; while in C.betulella the ostial plate is more transverse with the anterior apophyses about a little longer than the ostial plate. Possibly the signum of C.ibipennella curves abruptly near the apex of the spike; while that of C.betulella curves more evenly from the base of the spike. MBGBI3 illustrates coarser spiculation of the ductus bursae in C.betulella - but I have been unable to confirm this feature.