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NEPTICULIDAE | Nepticulinae | Nepticulini
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04.059 Stigmella svenssoni (Orange-headed Pigmy)
ws: 6-7mm; bivoltine in south May-Jun, Jul-Aug, univoltine in north; leaf-mine in oak (Quercus robur) Jul, Aug-Oct; local throughout GB
Stigmella svenssoni §1 female
ID: Forewing without pale markings or sharp colour transition; terminal cilia not white; head ferruginous; collar white > 3 species
S.roborella, S.svenssoni and female S.ruficapitella. These require genital dissection to separate.
Female genitalia: S.roborella has a large mass of signa in the bursa copulatrix adjacent to its junction with the ductus bursae; S.ruficapitella has a relatively small spiculate plate and S.svenssoni has a large corrugated sclerotised area: see Nepticuoidea info
S.roborella, S.svenssoni and female S.ruficapitella. These require genital dissection to separate.
Female genitalia: S.roborella has a large mass of signa in the bursa copulatrix adjacent to its junction with the ductus bursae; S.ruficapitella has a relatively small spiculate plate and S.svenssoni has a large corrugated sclerotised area: see Nepticuoidea info
§1 Pound Wood, Essex; 17/08/2019; female; fw 2.7mm; to light
All images © Chris Lewis
All images © Chris Lewis
Page published 02/09/2019 (§1)
Caution: 5 Stigmella specimens examined from Pound Wood in August 2019 - the 2 females were identified as S.svenssoni and the 3 males as S.ruficapitella - based on information in MBGBI1 and on comparison of images at Moth Dissection and at Nepticuloidea info. If these sources are reliable then the identifications seem sound, but I think it suspicious that the males and females appear to be different species - I should look for leaf-mines to confirm the presence of both species.
Caution: 5 Stigmella specimens examined from Pound Wood in August 2019 - the 2 females were identified as S.svenssoni and the 3 males as S.ruficapitella - based on information in MBGBI1 and on comparison of images at Moth Dissection and at Nepticuloidea info. If these sources are reliable then the identifications seem sound, but I think it suspicious that the males and females appear to be different species - I should look for leaf-mines to confirm the presence of both species.
