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 eberhardi (Johansson, 1971)

(zoological nomenclature: valid name, available)

General information:

Nepticula eberhardi Johansson, 1971: 258.
Type locality: Italy, Liguria, Val Merula di Moleto
Type: Holotype : Italy, Liguria, Val Merula di Moleto, 13.viii.1968, E. Jäckh, genitalia slide EJ 5073, in coll. USNM

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

   
PARATYPE, Italy, Andora-Conna PARATYPE: Italy, Castelforte    
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: Description by Nieukerken & Johansson (2003). Forewing length: 2.3-3.1 mm, 2.1-2.6 mm; frontal tuft yellowish white, ochreous or occasionally mixed white and brown, scape and collar white, antenna with 33-40 segments in , in with 25-31 segments; thorax and forewings dark bronze brown with faint bronze reflections; underside bluish black; hindwing covered with almost bluish black androconial scales in ; underside bluish black in , in hindwings and underside of wings grey; abdomen brown, anal tufts of yellowish, inserted on well sclerotized plates; in abdomen without pointed tip.

Distribution:

The species is widespread in the Mediterranean region, north to southern central Europe. It has been recorded from the Czech Republic and Slovakia, Austria, Hungary, south-eastern France, Spain, Portugal, Italy, Sardinia, Slovenia, Croatia, Macedonia, Greece and Turkey (Nieukerken 2016). It reaches its highest altitude in Turkey with 1500 m (Nieukerken & Johansson 2003).

Biology:

Adults are on wing from April to September. There are at least two generations per year (Nieukerken 2016).

Stages in development:

The larvae mine the leaves of Quercus ilex, Quercus petraea, Quercus pubescens, Quercus pyrenaica, Quercus robur and Quercus suber. The hard-leaved species are only seldom infested however (Nieukerken & Johansson 2003). The mine consists of a slender corridor with a narrow frass line (Nieukerken 2016).

Anatomy:

-genitalia -genitalia, aedeagus -genitalia, prep.-no. EJ5623, PARATYPE: Italy -genitalia, abdominal tip with tergite 8, prep.-no. EvN 3366
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, burso copulatrix, prep.-no. EvN 3366 -genitalia, PARATYPE: Italy    
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 slightly bilobed; uncus with triangular, widely separated horns; gnathos with long and thin, widely separate processes; valva with pointed distal process of about 1/3 valval length, inner lobe gradually rounded; sublateral processes about 1/3 transtilla length; aedeagus long, basally widened; vesica coiled, forming almost a complete coil, with several groups of cornuti, anteriorly a group of long ones, more posteriorly the cornuti becoming shorter; manica not very conspicuous, only covering distalmost part of aedeagus" (Nieukerken & Johansson 2003).

genitalia. "Accessory sac distinctly coiled, forming up to four coils, covered with many spines, except in anteriormost part; Ductus spermathecae with about 5 convolutions" (Nieukerken & Johansson 2003).

Diagnosis:

"Males usually easy to recognise by the pale head and dark bronzy brown androconials; faded specimens may somewhat resemble S. roborella or pale headed S. samiatella (particularly in Spain). Sicilian S. roborella has androconials very similar to those of eberhardi. S. dorsiguttella has paler brown or orange-yellow androconials and also a clear androconial patch on basal 2/3 of forewing underside. Female very similar to S. roborella, but ovipositor not pointed.
Male genitalia resemble S. roborella, but valva with rounded inner lobe and aedeagus with broader anterior part and more clearly contorted vesica. Female genitalia with accessory sac very distinctly contorted, unmistakeable" (Nieukerken & Johansson 2003).
The mine cannot be distinguished from the mines of S. roborella and S. atricapitella (Nieukerken 2016).

Worth knowing:

Sources:

Johansson, R. 1971. Notes on the Nepticulidae (Lepidoptera) I. A revision of the Nepticula ruficapitella group. Entomologica Scandinavica 2: 241-262.
Nieukerken, E. J. van & 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 2016. Nepticulidae and Opostegidae of the world. - URL: http://nepticuloidea.info/ [online 2016.06.27].

Publication data:

history:
Kurz Michael: 2016.06.27
Kurz Michael: 2016.06.30
not reviewed

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