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

Micropterix rablensis Zeller, 1868

(zoological nomenclature: valid name, available)

General information:

Micropteryx rablensis Zeller, 1868: 133-135.
Type locality: Oberkärnthen, Raibl [Italy, Friuli-Venzia Giuglia, near Tarvisio] und Preth im angrenzenden Küstengebiet [Slovenia, Log Pod Mangrtom].
Type: Syntypes: Oberkärnthen, Raibl and Preth, June [1867 ?], in coll. NHM, London

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

: Italy, Friuli-Venezia Giulia, Tarvisio, Lago del Predil, 2001.06.30, leg. Zeller & Kurz, coll. Michael Kurz : Italy, Friuli-Venezia Giulia, Prealpi Giulie, Tugliezzo, 450 m, 2005.07.03, leg. et coll. Helmut Deutsch : Italy, Friuli-Venezia Giulia, Tarvisio, Lago del Predil, 2001.06.30, leg. Zeller & Kurz, coll. Michael Kurz : Italy, Friuli-Venezia Giulia, Prealpi Giulie, Tugliezzo, 450 m, 2005.07.03, leg. et coll. Helmut Deutsch
Picture from: Kurz Michael
Detailed view
Picture from: © Deutsch Helmut
Detailed view
Picture from: Kurz Michael
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Picture from: © Deutsch Helmut
Detailed view

Scheme of wing pattern:

Description of adults: Examined: 11 , 4 . Forewing length: 3.0 – 3.4 mm; 3.25 – 3.8 mm. Head black-brown, vestiture of hair-like scales on the head dirty white, light yellowish grey to yellow; antennae brown, light reddish golden shining, 3/4 (), respectively, 2/3 () of forewing length; thorax bronzy golden, tegulae bronzy golden, posteriorly coppery to purple; forewings reddish bronzy golden to purple, with three whitish golden to light golden, sometimes diffusely bordered fasciae across the whole wing width: a fascia at 1/4, slightly bent inwards, narrow at costa and constantly broadening towards inner margin; a broad, more or less straight fascia at 1/2, sometimes slightly enlarged inwards at the anterior third; sometimes a small costal spot at 2/3, which can be joined with median fascia or with outer fascia; a broad fascia at 3/4, often enlarged inwards in middle; fringe coppery proximally, distally whitish golden; hindwing bronzy golden, sometimes with a slightly reddish to purple tinge; fringe slightly reddish to purple proximally, distally light golden; legs and abdomen light brown, golden shining.

Distribution:

Zeller (1868) has described the species from Raibl (Italy, Friuli-Venzia Giuglia) and Preth (= Log Pod Mangrtom, Slovenia). Further confirmed records are known from Carinthia, Styria and Lower Austria (Kurz & Kurz 2013). Records from the Traunstein and from Altaussee (Upper Austria and north-eastern Styria), that have been doubted by Zeller-Lukashort et al. (2007), have meanwhile been confirmed too (Zeller-Lukashort pers. comm., see also ZOBODAT, Pröse 1987 and Kurz & Kurz 2013). Records from Romania (Heath 1996, Karsholt & Nieukerken 2011) and Croatia (Karsholt & Nieukerken 2011) are still doubtful and probably belong to Micropterix myrtetella Zeller, 1850, although meanwhile a specimen from the slovakian karst has been identified too (Kurz & Kurz 2013). Records from France (Viette 1948, Karsholt & Nieukerken 2011) turned out to be misidentifications (Heath in litt. according to Leraut 1980). Furthermore, all examined animals from Trieste (Heath 1965) belong to Micropterix croatica Heath & Kaltenbach, 1984 and not to M. rablensis. Vertically, records have been documented from 400 - 1800 m a.s.l. (Kurz & Kurz 2013).

Biology:

   
Biotope: Outskirts of the forest: Friuli, near Tarvisio, Lago del Predil, 2001.06.30 Some animals on blossoms of Vicia sylvatica: Friuli, near Tarvisio, Lago del Predil, 2001.06.30    
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
   

The species was observed at outskirts of forest with tall herbaceous vegetation and bushes, congregating on Aruncus dioicus (Rosaceae) and Vicia sylvatica (Fabaceae). In competition with M. rablensis on flowers of Aruncus dioicus, Micropterix aruncella (Scopoli, 1763), Micropterix aureatella (Scopoli, 1763) and Micropterix rothenbachii Frey, 1856 were recognized too (Zeller-Lukashort et al. 2007, Kurz & Kurz 2013). Zeller (1868) recorded M. rablensis from Athamanta cretensis (Apiaceae), whereas Deutsch found it feeding on Clematis vitalba (Ranunculaceae, see Kurz & Kurz 2013). The imagines are on the wing in one generation per year. Even in low altitudes, they fly quite lately and have been documented from June and July only (Kurz & Kurz 2013).

Stages in development:

The early stages are unknown.

Anatomy:

, scheme of cuticle -genitalia, prep.-no. 787, M. Kurz: Styria, near Graz, Gösting, [? 18]66.06.20, coll. Naturhistorisches Museum, Vienna -genitalia, prep.-no. 316, M. Kurz: "Möderndorf; Kärnten; 7.7.06", coll. Oberösterreichische Landessammlung, Linz -genitalia, phallus in higher magnification, prep.-no. 364, M. Kurz: "Möderndorf; Kärnten; 7.7.06", coll. Oberösterreichische Landessammlung, Linz
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
, scheme of cuticle -genitalia, prep.-no. 814, M. Kurz, preparation in caustic potassium: Italy, Friuli-Venezia Giuglia, near Tarviso, Lago del Predil, 2001.06.30, leg. Zeller & Kurz, coll. Michael Kurz -genitalia, prep.-no. 814, M. Kurz, permanent preparation: Italy, Friuli-Venezia Giuglia, near Tarvis, Lago del Predil, 2001.06.30, leg. Zeller & Kurz, coll. Michael Kurz -genitalia, prep.-no. 366, M. Kurz: "Lantsch; 13.7.16 ", coll. Oberösterreichische Landessammlung, Linz
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
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Picture from: Kurz Michael
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-genitalia, receptaculum seminis in higher magnification, prep.-no. 366, M. Kurz: "Lantsch; 13.7.16 ", coll. Oberösterreichische Landessammlung, Linz      
Picture from: Kurz Michael
Detailed view
     

Genitalia. Uncus very short; beyond uncus and inside tegumen, tufts of long, very acute hair-like setae; tegumen and accessory claspers fused, strongly developed; accessory claspers with a row of short, isolated, straight spinoid setae at anterior margin, starting near uncus; a row of short, acute, proximally straight, distally increasingly curved spinoid setae inside the lower posterior margin; anteriorly a short row of small, strongly modified, broad T-shaped (or hatched-shaped) thickened setae (starting at anterior margin of accessory claspers); proximally of these, some very small, acute, straight spinoid setae; valvae moderately long, slender, strongly constricted medially, the distal part spatulate, slightly bent upwards; a row of longer setae and two to three rows of short to very short, straight spinoid setae (proximally intergrading to a row of spinoid setae reaching the constriction) at the distal part on inner surface.

Genitalia. Tergite IX missing, sternite IX strongly reduced, weakly sclerotized in the middle distally, here partly without sclerotization (maybe characteristic for this species), partly with only indistinct lateral margins; terminal papillae with a sclerotized band; receptaculum seminis very short, narrow, at beginning of ductus receptaculi enlarged like a knot, distinctly constricted before middle, inflated into a sac in the last part; receptaculum seminis with striation along the entire length, but not very regular; a longer appendix at the end.

Diagnosis:

M. rablensis : Italy, Friuli-Venezia Giulia, Tarvisio, Lago del Predil, 2001.06.30, leg. Zeller & Kurz, coll. Michael Kurz M. croatica : Italy, Triest, 1910.06.12, leg. Wolfschläger, coll. Zoologische Sammlung des Bayrischen Staates, Munich M. aureatella : "ALPENVORLAND; Thalgau/Sbg. 6/3;20.5.1989; 12.40-14.05 h; leg. M.K.", coll. Michael Kurz M. aureoviridella : Salzburg, Pongau, Hochkönig, Kaserfeld-Mandlwand, 1750 m, 1994.07.02, leg. et coll. Michael Kurz
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
M. allionella : France, Alpes Maritimes, near Nice, La Turbie, 1952.05, leg. Klimesch, coll. Zoologische Sammlung des Bayrischen Staates, Munich M. myrtetella : Lower Austria, Wiener Becken, Gumpoldskirchen, 1941.06.25, coll. Naturhistorisches Museum, Vienna M. rablensis -genitalia, prep.-no. 787, M. Kurz: Styria, near Graz, Gösting, [? 18]66.06.20, coll. Naturhistorisches Museum, Vienna M. croatica -genitalia, prep.-no. 744, M. Kurz: Croatia, Istria, near Opatija, Ucka, 2001.06.23, leg. Hausenblas und Zeller, coll. Michael Kurz
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
M. aureatella -genitalia, prep.-no. 202, Ch. Zeller: Salzburg, Flachgau, Eugendorf, Unzing, Wörlemoos, 2003.05.17, leg. Hausenblas & Zeller, coll. Christof Zeller M. aureoviridella -genitalia, prep.-no. 778, M. Kurz: Salzburg, Hohe Tauern, Habachtal, near Gasthaus Enzian, 2004.07.17, leg. et coll. Michael Kurz M. allionella -genitalia, prep.-no. 750, M. Kurz: Liguria, Savona, Noli, 1951.04.26, leg. Josef Klimesch, coll. Michael Kurz M. myrtetella -genitalia, prep.-no. 754, M. Kurz: Croatia, Kvarneric islands, Krk, Baska, 2002.04.30, leg. Jan Liska, coll. Jan Liska
Picture from: © Zeller Christof
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
M. rablensis -genitalia, prep.-no. 814, M. Kurz: Italy, Friuli-Venezia Giuglia, near Tarvis, Lago del Predil, 2001.06.30, leg. Zeller & Kurz, coll. Michael Kurz M. croatica -genitalia, prep.-no. 963, M. Kurz: Friuli-Venezia Giulia, Triest, 1973.05.04, leg. J. Klimesch, coll. Michael Kurz M. aureatella -genitalia, prep.-no. 808, M. Kurz: Vorarlberg, Brandnertal, Böser Tritt, 1700 m, 2004.07.30, leg. Puchmayr & Kurz, coll. Michael Kurz M. aureoviridella -genitalia, prep.-no. 810, M. Kurz: Eastern Tyrol, Glockner group, Kals, Moar Alm, 1800 - 2000 m, 2002.06.27, leg. Helmut Deutsch, coll. Michael Kurz
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
   
M. allionella -genitalia, prep.-no. 812, M. Kurz: Emilia Romagna, northern Apennines, Sestola, 1992.05.29, leg. Hausenblas, Zeller, Kurz, coll. Michael Kurz M. myrtetella -genitalia, prep.-no. 896, M. Kurz: Greece, Peloponnesos, Taygetos, Kastanea, 1999.05.24, leg. Puchmayr & Kurz, coll. Michael Kurz    
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
   

Micropterix croatica Heath & Kaltenbach, 1984 is externally very similar to M. rablensis, but can be separated by its darker purple-violet ground colouration of the forewing, as well as by its more distinct, sharper markings. M. rablensis could be confused also with small specimens of Micropterix auratella (Scopoli, 1763) or Micropterix aureoviridella (Höfner, 1898). M. aureatella is darker purple-violet with smaller and distincter fasciae, M. aureoviridella shows mostly a less purplish colouration than M. rablensis, with indistinct markings and a bronzy golden inner margin. M. rablensis can be separated too from both species by its broad outer fascia, which is mostly only an oval spot in M. aureatella and M. aureoviridella. Sometimes, small Micropterix allionella (Scopoli, 1794) might also be confused with M. rablensis, although the latter is normally much smaller.
The male genitalia of M. croatica are very similar to those of M. rablensis, but can be separated besides other characters by their row of spinoid setae on the valvae, which reach the basal third. M. myrtetella Zeller, 1850 is also related to M. rablensis and shows also a row of spinoid setae on the valvae postbasally, but the outer fascia of the forewing is reduced to a spot. All other mentioned species are easily separable in male genitalia. In the female genitalia, the form of sternite IX may be characteristic for M. rablensis, but greater series have to be investigated in order to confirm this.

Phylogeny: As already mentioned above, M. rablensis, M. croatica and M. myrtetella form a group of closely allied species with respect to their male genitalia. Especially the reduced uncus and the much inflated accessory claspers seem to be autapomorphies of this group.

Worth knowing:

Sources:

Heath, J. 1965. Ergebnisse der Albanien-Expedition 1961 des Deutschen Entomologischen Institutes, 33. Beitrag, Lepidoptera: Micropterigidae. – Beiträge zur Entomologie 15: 641–647.
Heath, J. 1996. Family Micropterigidae – In: O. Karsholt & J. Razowski (eds), The Lepidoptera of Europa. A distributional checklist. – Apollo-Books, Stenstrup.
Karsholt, O. & E. J. van Nieukerken 2011. Micropterigidae. In - Karsholt, O. & E. J. van Nieukerken (eds.). Lepidoptera, Moths. – Fauna Europaea version 2.4., http://www.faunaeur.org [online 28 March 2012].
Kurz, M. A. & M. E. Kurz 2000–2013. Naturkundliches Informationssystem. – URL: http://www.nkis.info [online 25 October 2013].
Leraut, P. 1980. Liste systématique et synonimique des Lépidoptères de France, Belgique et Corse. – Supplément á Alexanor et Bulletin de la Société Entomologique de France. 334 pp.
Pröse, H. 1987. Kleinschmetterlinge: Wissensstand, Erhebungen und Artenschutzproblematik, Anhang: Artenliste der in Bayern und den angrenzenden Gebieten nachgewiesenen Microlepidoptera (Kleinschmetterlinge). – Schriftenreihe Bayerisches Landesamt für Umweltschutz 77: 37–102.
Viette, P. 1948. Lépidoptères homoneures. – Faune de France, Paris 49.
Zeller, P. C. 1868. Lepidopterologische Ergebnisse einer Reise in Oberkärnthen. – Entomologische Zeitung 29 (4–6): 121–149.
Zeller-Lukashort, H. C., M. E. Kurz, D. C. Lees & M. A. Kurz 2007: A review of Micropterix Hübner, 1825 from northern and central Europe (Micropterigidae); Nota lepidopterologica 30 (2): 235 – 298.
ZOBODAT 1972–2007. Zoologisch-botanische Datenbank, Oberösterreichisches Landesmuseum. – URL: http://www.zobodat.at [online 1 January 2007].

Publication data:

history:
Kurz Michael: 2006.04.18
Zeller Christof: 2006.11.28
Kurz Michael: 2008.11.19
Kurz Michael: 2012.03.28
Kurz Michael: 2012.05.14
Kurz Michael: 2013.10.25
Kurz Michael: 2014.02.24
Document reviewed by:
not reviewed: 2014.02.24
Document released by:
Kurz Michael: 2014.02.24

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