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 ilicifoliella (Mendes, 1918)

(zoological nomenclature: valid name, available)

General information:

Nepticula ilicifoliella Mendes, 1918: 127.
Type locality: Spain, Salamanca
Type: Syntypes: Spain, Salamanca, Feb. 1912/1913, larvae on Quercus ilex, adults in May-June, Mendes, depository unknown (Nieukerken & Johansson 2003)

Synonyms, misspellings, wrong determinations, etc.:
Stigmella ilicivora nigra Dufrane, 1955: 192. Type locality: Portugal. Junior subjective synonym.

Habit:

     
: Spain, Cadalso de los Vidrios      
Picture from: Nieukerken 2016 (CC-BY-NC 3.0)
Detailed view
     

Description of adults: (Nieukerken & Johansson 2003). : "Forewing length 2.5-3.0 mm, wingspan 6.0-6.6 mm. Head: frontal tuft from almost white or ochreous to yellowish orange, occasionally black, collar pale grey to dark grey-fuscous. Scape pale yellow. Antenna slightly darker, 3/5 of forewing length, with 39-50 segments, ratio to forewing length 15-19 segments/mm. Thorax and forewing unicolorous dark bronze brown, at base and on thorax almost bluish black in fresh specimens, a faint purplish lustre at apex; terminal cilia concolorous, underside bronzebrown. Hindwing coarsely scaled, dark grey-brown, dorsum with long dark brown to bluish black androconial scales, extending into fringe, the longest near base, approximately 3/4 of cilia length; along basal half of costa long curved, spatulate bluish-black androconial scales, the longest as long as or longer than the shortest dorsal androconial scales; underside grey brown, cilia dark grey. Abdomen dark grey brown, with conspicuous white to pale yellowish anal tufts inserted on well sclerotized plates; genital capsule not particularly broad, valvae with dense tuft of hairs."

: "Forewing length 2.5-2.9 mm. Antennae with 33-40 segments, ratio to forewing length 12-16 segments/mm. As male, but collar yellowish white to pale yellow, hindwing grey, androconial scales absent, abdomen dark grey-brown, without anal tufts" (Nieukerken & Johansson 2003).

Distribution:

Following Nieukerken & Johansson (2003), "the species is widespread in Portugal and Spain, particularly inland, but probably less common than suberivora. In France (new record) known from old specimens along the Atlantic coast near Bordeaux and in the Hérault and the Côte d´Azur near Cannes; to be expected along the Italian Riviera and in North Africa." The species is frequently found in mountains with a vertical distribution from sea level up to 2200 m in the Sierra Nevada.

Biology:

"Larvae have been collected in February and March. Adults have been collected from June to early September, voltinism unknown" (Nieukerken & Johansson 2003).

Stages in development:

The larvae feed on Quercus ilex, Q. rotundifolia and Q. suber. The mines are similar to those of S. suberivora, but are almost invisible, because they are covered by a part of uneaten leaf parenchyma. If this character however always separates the mines is unclear, since it also may depend on the leaf thickness (Nieukerken & Johansson 2003).

Anatomy:

-genitalia, EvN 3340 -genitalia, RJ1754: Spain -genitalia, aedeagus, EvN 3443 -genitalia, aedeagus, RJ1754: Spain
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, EvN 3364 -genitalia, abdominal tip with tergite 8, EvN 2517 -genitalia, HOLOTYPE, RJ2275A: Spain  
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 (Nieukerken & Johansson 2003). "Capsule longer than wide or almost as long as wide. Vinculum anteriorly slightly bilobed. Uncus with widely separated horns. Gnathos with widely separated posterior processes with club-shaped tips. Valva with pointed distal process less than 1/4 valva length, pointing slightly inwards; inner margin forming a rounded lobe, ventral outer lobe pronounced, but not as bulging as in suberivora, covered with field of dense setae, but no papillae; sublateral processes short. Aedeagus with vesica with a more or less curved group of cornuti in basal half; this band comprises about 20-30 large cornuti with serrated bases and many small spinelike cornuti; more distally there is a group of ca 7-12 long needle-shaped cornuti and a few near phallotrema; manica covering aedeagus almost completely, except anteriormost part, covered with small spines and pectinations."

genitalia (Nieukerken & Johansson 2003). "T8 with ca. 25-50 setae. Bursa length 1062-1204 ým, 2.3-3.0as long as accessory sac. Bursa distally covered with minute pectinations, difficult to see (observed with Differential Interference Contrast only); accessory sac anteriorly with pectinations only. Ductus spermathecae with 4.5 (n=3) convolutions."

Diagnosis:

The species is "almost inseparable from the sympatric S. suberivora, except for the much narrower male genitalia, which can be seen without dissection with some experience. Males also have significantly longer antennae than suberivora, but there is some overlap, in females the difference is less obvious. Valvae not bulging, without field of papillae, but with a field of many setae, genitalia capsule longer than wide. Female genitalia with ductus spermathecae with 4.5 convolutions, ratio bursa /accessory sac 2.3-3, smaller than in suberivora; usually more setae on T8" (Nieukerken & Johansson 2003).

Worth knowing:

Sources:

Mendes, C. 1918. Lepidopteros de Salamanca. Brotéria. Serie Zoológica 16: 111-129.
Nieukerken, E. J. van & R. Johansson 2003. The Quercus feeding Stigmella species of the west Palaearctic: new species, key and distribution (Lepidoptera: Nepticulidae). Tijdschrift voor Entomologie 146 (2): 307-370.
Nieukerken, E. J. van 2016. Nepticulidae and Opostegidae of the world. - URL: http://nepticuloidea.info/ [online 2016.11.11].

Publication data:

history:
Kurz Michael: 2016.06.23
Kurz Michael: 2017.02.22
not reviewed

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