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Recent Publications
- Biology of Pseudopostega species in Europe (Lepidoptera: Opostegidae). In J. van der Linden, Some endophagous insects from the Upper Midwest, USA.
- Ciclo estacional de un minador subcortical de coigue (Nothofagus dombeyi) [Seasonal cycle of a coigüe (Nothofagus dombeyi) subcortical leafminer]
- Notes on the oviposition sites and larval mines of Opostegoides minodensis (Kuroko), a cambium-miner of Japanese White Birch.
- The Nepticulidae and Opostegidae (Lepidoptera) of North West Europe
- Introduction to the Nepticulidae
- Stigmella aurella (F.) and Stigmella splendidissimella (H.S.) (Lep., Nepticulidae) - a method of distinguishing mines on Rubus
Nepticuloidea
Stigmella circumargentea van Nieukerken & Liu, 2000
Stigmella circumargentea
Diagnostic description:Diagnosis. Easily recognised by the colour pattern of the forewing, being almost completely metallic leaden tot silver, with the exception of brown dorsal and terminal patches. Female genitalia characterized by emarginate T8 and large group of spines at left side of accessory sac. S. lithocarpella, which occurs on the same host and locality is very different externally and also makes completely different leafmines, almost resembling Ectoedemia-mines.
Morphology:Description. Male unknown.
Female. Forewing length 2.8 mm (n=2), wingspan 6.2 mm. Head: frontal tuft pale yellowish white to pale orange; collar grey; scape white; flagellum . Antennae with 22 segments (n=1).
Thorax and forewing shining metallic leaden, with a coppery gloss, more silvery in apical part (fascia); at 1/2 a blackish brown patch along costa, enclosed by the junction of fascia and basal patch; fascia followed by dark brown patch; terminal scales silvery with brown tips, which for a cilia line; terminal cilia silvery white. Hindwing grey.
Male genitalia unknown.
Female genitalia. T8 with emarginated posterior margin; middle area with about 6 setae, otherwise bare; two lateral scaly patches with each 10-13 setae. Bursa flimsy, hardly visible; accessory sac total length ca. 800 μm, with narrow ductus and heavily, longitudinally folded walls; at left side covered with numerous (more than 250) spines. Ductus spermathecae originating in distal part of accessory sac, hardly convoluted.Associations:Hostplant. Lithocarpus dealbatus, an evergreen cupuliferous tree with entire, coriaceous leaves. Mines collected on leaves of 40-125 mm long. Mines on L. mairei (same locality) probably belong also to this species.
Leafmines. Egg deposited on leaf upperside, between the margin and midrib. Mine starts as a long gallery, varying from sinuous to almost straight, with linear to dispersed frass, filling early mine, later frass 1/3 of mine. Total mine length about 4-6 cm.
Larva. Yellow, headcapsule brown. Feeds with dorsum upwards.Distribution:Yunnan.
Life cycle:Life history. Larvae found in October, adults reared in November.
Citation:This taxonomic description is based on Van Nieukerken (2000).