046 Orthonama vittata (Oblique Carpet)

GEOMETRIDAE | Larentiinae | Xanthorhoini

70.046 Orthonama vittata (Oblique Carpet)

fw: 11-14mm; bivoltine in south - May-Jun, Aug-Sep, univoltine in north - Jul; marsh/heath bedstraw (Galium pallustre/saxatile); local in wet habitats throughout GB.

Orthonama vittata (Oblique Carpet) §1

ID: Characterised by the dark streak running from the forewing apex to join a cross-line which is more heavily marked from the point of junction to the dorsum than it is from the point of junction to the costa. The central cross-band of the forewing is of uneven width and notably narrower on the costa than at the central spot; the cross-band is also paler around the central spot.
Phibalapteryx virgata (Oblique Striped) and Costaconvexa polygrammata (Many-lined) are similar but do not show a narrowing of the central band at the costa and the apical dash is much weaker in not connected to the postmedian cross-line in P.virgata and in C.polygrammata the apical dash is pale.
Male genitalia: valvula small, quadrangular; costa free, strong and pointed; sacculus small, rounded; manica heavily spined.

Variation
Dissection
Male genitalia
Female genitalia

§1 Patterdale, Cumbria; 17/08/2008; fw 12.2mm
§2 Sutton Fen, Norfolk; 05/06/2009
§3 Strumpshaw Fen, Norfolk; 09/09/2011; male
§4 Strumpshaw Fen, Norfolk; 05/07/2013; male
§5 Compton Bishop, Somerset; 28/08/2014; fw 12.0mm
§6 Strumpshaw Fen, Norfolk; 25/05/2018; male; fw 12.1mm
§7 Sutton Fen, Norfolk; 13/06/2022; male
§8 Sutton Fen, Norfolk; 13/06/2022; male
All images © Chris Lewis