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

Stigmella basiguttella (Heinemann, 1862)

(zoological nomenclature: valid name, available)

General information:

Nepticula basiguttella Heinemann, 1862: 258.
Type locality: Germany, Braunschweig
Type: Lectotype : Germany: Br[aun]schw[eig], Eichen e.l., Heinemann, in coll. LMHG (designated by Johansson 1971)

Synonyms, misspellings, wrong determinations, etc.:
Stigmella cerricolella Klimesch, 1946: 160. Type locality: Italy, Ferrania (Ligur. Appenin). Junior subjective synonym.

Habit:

   
: Germany, Lüneburger Heide LECTOTYPE: Germany, Braunschweig    
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: (Johansson et al. 1990) : "Wingspan 4.5-6 mm. Head: frontal tuft yellowish brown, dark grey brown to black on vertex; collar and scape white; antenna slightly longer than half length of forewing. Thorax darker than forewings, almost black. Forewing: dark bronzy brown to dark brownish or greenish grey; wing pattern very variable, rarely unicolorous, usually with a distinct yellowish white spot at extreme base of forewing; often with two or more less distinct, opposite spots at two thirds from wing base; spots sometimes large and confluent, reducing the dark ground colour to a narrow line along basal half of costa and an apical spot. Terminal cilia grey brown, shading into pale grey at tips. Hindwing and cilia pale grey. Abdomen: fuscous; anal tufts yellowish grey."

: Similar to male.

Distribution:

"The species is found in all of Europe, except Ireland and Iceland. It is also found in south-west Asia up to northern Iran. It has recently been recorded from Azerbaijan, Georgia and Tunisia" (Nieukerken 2016).

Biology:

In northern and central Europe, there are two generations per year with feeding larvae from the end of June to the middle of July and again in September and the first half of October. In the Mediterranean, imagines are continuously found from May to September (Johansson et al. 1990).

Stages in development:

The following larval foodplants are recorded: Castanea sativa, Quercus castaneifolia, Quercus cerris, Quercus frainetto, Quercus macrolepis, Quercus petraea, Quercus pubescens, Quercus pyrenaica, Quercus robur and Quercus rubra (Nieukerken 2016). The mine is a long, slowly widening, slender corridor with the frass completely filling it. The cocoon is dark red to red-brown.

Anatomy:

-genitalia -genitalia, aedeagus -genitalia, apophyses -genitalia, bursa copulatrix
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 relatively long, almost parallel-sided with broad V-shaped posterior and anterior emargination. Uncus small, with two short and blunt, widely separated posterior processes. Gnathos with long slender horizontal bar and short blunt horns. Valva with short distal process and relatively long inner lobe; tergum VIII with two conspicious square plates bearing the anal tufts. Transtilla very long and broad; sublateral processes long, club-shaped. Aedeagus almost twice as long as genital capsule with numerous slender cornuti of varying length, the longest approximately half length of aedeagus; near tip two to four short, pointed cornuti with broad bases (Johansson et al. 1990).

genitalia. "Corpus bursae strongly reduced. Accessory sac large with very large and well sclerotized spinose plate extending into vestibulum. Ductus spermathecae weakly sclerotized, almost invisible with 2-3 convolutions. Tergum VIII with short, posteriorly rounded medial plate; apophyses anteriores broad with slender anterior process; posteriores long and slender" (Johansson et al. 1990).

Diagnosis:

"The combination of basal spot, black head and lack of androconial scales on male hindwing, in most cases separates basiguttella from other oak-feeding species. In specimens with unicolorous forewings, the genitalia are distinctive and differ widely from all other desribed species" (Johansson et al. 1990).

Worth knowing:

Sources:

Heinemann, H. 1862. Einige Bemerkungen über die Arten der Gattung Nepticula. Wiener Entomologische Monatschrift 6: (8) 237-268, (10) 301-320.
Johansson, R. 1971. Notes on the Nepticulidae (Lepidoptera) I. A revision of the Nepticula ruficapitella group. Entomologica Scandinavica 2: 241-262.
Johansson, R., E. S. Nielsen, E. J. van Nieukerken & B. Gustafsson 1990. The Nepticulidae and Opostegidae (Lepidoptera) of North West Europe. Fauna Entomologica Scandinavica, vol. 23, 2 parts, 739 pp., 1122 [54 col.] figures.
Nieukerken, E. J. van 2016. Nepticulidae and Opostegidae of the world. - URL: http://nepticuloidea.info/ [online 2016.03.14].

Publication data:

history:
Kurz Michael: 2016.03.14
Kurz Michael: 2016.10.26
Kurz Michael: 2017.07.31
not reviewed

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