N A T U R K U N D L I C H E S á I N F O R M A T I O N S S Y S T E M

Stigmella fasciata van Nieukerken & Johansson, 2003

(zoological nomenclature: valid name, available)

General information:

Stigmella fasciata van Nieukerken & Johansson, 2003: 321.
Type locality: Slovenia, 7 km SE Piran, Cedle
Type: Holotype : Slovenia, 7 km SE Piran, Cedle, 300 m, 12.x.1983, J.J. Boomsma & E.J. van Nieukerken, VU no 83444KE2, e.l. 24.v.1984, in coll. RMNH, Leiden

Synonyms, misspellings, wrong determinations, etc.:
---

Habit:

   
PARATYPE: Greece, Kalavrita HOLOTYPE: Slovenia, 7 km SE Piran, Cedle, 300 m, 12.10.1983    
Picture from: Nieukerken 2016 (CC-BY-NC 3.0)
Detailed view
Picture from: Nieukerken 2016 (CC-BY-NC 3.0)
Detailed view
   

Description of adults: Examined: Original description (Nieukerken & Johansson 2003). : "Forewing length 1.95-2.35 mm, frontal tuft of head ochreous, collar dark brown; scape white, edged with dark bluish grey; antenna with 26-29 segments, yellowish grey; thorax dark copper-brown; basal half of forewing dark copper-brown with weak metallic reflections; fascia postmedial, very narrow, consisting of only a few silvery scales; distal to fascia coarsely scaled, dark copper-brown to fuscous; cilia-line distinct; cilia greybrown; underside grey-brown with a long reflexed row of spatulate lead-grey to silver androconial scales along dorsum, covering an elongate pocket; hindwing dark brown to fuscous, along costa and dorsum with bluish black androconial scales extending over cilia to at most one third, near frenulum longer and broader; underside of hindwing and androconial scales grey-brown; abdomen almost black, no visible anal tufts; no sclerotized plates."
: "Forewing length 2.05-2.15 mm; frontal tuft of head ochreous, collar yellowish white [almost missing in holotype]; scape yellowish white; antenna shining fuscous, with 24? segments; thorax fuscous; forewing with basal half fuscous, weakly shining; fascia postmedial, shining silver, constricted in middle; distal to fascia coarsely scaled, fuscous; cilia-line distinct; terminal cilia greybrown; underside dark greybrown; hindwing greybrown, with weak bronze reflections; cilia greybrown; underside dark greybrown."

Distribution:

The species has been found so far in Slovenia, Croatia, Greece and Turkey (Nieukerken & Johansson 2003). Its occurence in Bosnia, Serbia, Montenegro and Makedonia is furthermore implicated by the distribution map shown by Nieukerken (2016).

Biology:

Larvae are found in July and October, adults from June to September (Nieukerken & Johansson 2003).

Stages in development:

   
Two mines on Quercus cf. pubescens: Greece, Parnis Oros Two intertwined mines, Quercus pubescens, Slovenia, from these holotype was reared    
Picture from: Nieukerken 2016 (CC-BY-NC 3.0)
Detailed view
Picture from: Nieukerken 2016 (CC-BY-NC 3.0)
Detailed view
   

Description of early stages following Nieukerken & Johansson (2003) and Nieukerken (2016):

Egg. The eggs are deposited on the leaf underside of Quercus pubescens, usually 2-3 (or more) eggs are deposited close by, rarely only one.

Mine. The mine consists of an extremely densely wound corridor, resembling a brown dot. The frass is brown and dispersed, almost filling the mine completely. Only the last part of the corridor loosens itself from the knot. Not all the eggs hatch or young larvae die, so that in a sample of 86 leaves with mines, A. Lastuvka (in litt.) observed two complete mines in 50%, three in 10% and only one in 40% of the leaves. In the case of 2-3 mines, they are usually intertwined closely in the early part.

Anatomy:

-genitalia, prep.-no. EvN 3462 -genitalia, prep.-no. EvN 2610: 40, Capsule; 41, aedeagus; 42, gnathos; 43, valva: Turkey -genitalia, HOLOTYPE: Slovenia, 7 km SE Piran, Cedle, 300 m, 12.10.1983 -genitalia, HOLOTYPE: Slovenia, 7 km SE Piran, Cedle, 300 m, 12.10.1983
Picture from: Nieukerken 2016 (CC-BY-NC 3.0)
Detailed view
Picture from: Nieukerken 2016 (CC-BY-NC 3.0)
Detailed view
Picture from: Nieukerken 2016 (CC-BY-NC 3.0)
Detailed view
Picture from: Nieukerken 2016 (CC-BY-NC 3.0)
Detailed view

genitalia. "Vinculum anteriorly only slightly concave; uncus with very widely separated horns with many long curved setae; gnathos with long, very widely separated posterior processes, connected by a very thin, curved bar; valva with short distal process, and prominent inner lobe; inner margin almost straight; ventrally a transverse ridge with setae; sublateral processes about 1/2 transtilla length; aedeagus with vesica in distal 2/3 of aedeagus, covered with many needle-shaped cornuti and a group of larger ones distally; manica absent." (Nieukerken & Johansson 2003)

genitalia. "T8 with two slight indentations laterally, no grooves; bursa well visible, total length 787 ým, walls thin, without pectinations; Accessory sac more strongly sclerotized, without pectinations, about 1/3 bursa length; ductus spermathecae with about 2 convolutions after a long straight part with minute granulation." (Nieukerken & Johansson 2003)

Diagnosis:

"Differs from all other western Palaearctic oak mining Stigmella by presence of fascia and distinct cilialine, male in addition by peculiar androconial scales on forewing underside and dark edged scape. Female can only be confused with other European Stigmella with fascia and cilia-line: S. freyella (Heyden, 1858), which has a dark head and paler cilia, S. malella (Stainton, 1854), which has a much straighter, unconstricted fascia and S. hemargyrella (Kollar, 1832), which is much larger. Further the male genitalia are highly diagnostic, not resembling any other species. Female genitalia rather similar to S. suberivora (Stainton, 1869), S. ilicifoliella (Mendes, 1918) and S. cocciferae Nieukerken & Johansson, 2003, but these have the ductus spermathecae with more than 4 convolutions, whereas fasciata has only 2. This species is very different from all other Western Palaearctic species in the S. ruficapitella group, but shares several characters with Eastern Palaearctic species (Van Nieukerken & Liu 2000), which more often have a fascia. The mine is almost indistinguishable from that of S. fervida Puplesis, 1984, except that the latter has the egg on leaf upperside and is usually laid singly." (Nieukerken & Johansson 2003)

Worth knowing:

Sources:

Nieukerken, E. J. van 2016. Nepticulidae and Opostegidae of the world. - URL: http://nepticuloidea.info/ [online 2016.06.29].
Nieukerken, E. J. van & R. Johanssson 2003. The Quercus feeding Stigmella species of the West Palaearctic: new species, key, distribution (Lepidoptera: Nepticulidae). Tijdschrift voor Entomologie 146: 307-370.
Nieukerken, E. J. van & Y. Liu 2000. Nepticulidae (Lepidoptera) in China, 1. Introduction and Stigmella Schrank feeding on Fagaceae. Tijdschrift voor Entomologie 143: 145-181.

Publication data:

history:
Kurz Michael: 2016.06.30
Kurz Michael: 2016.07.05
not reviewed

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