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

Cauchas fibulella ([Denis & Schiffermüller], 1775)

(zoological nomenclature: valid name, available)

General information:

Tinea fibulella [Denis & Schiffermüller], 1775: 143, no. 33
Type locality: Austria, surrounding of Vienna
Type: destroyed in the Hofburg fire in 1848 (anonymous 2009b)

Synonyms, misspellings, wrong determinations, etc.:
Tinea exiguella [Denis & Schiffermüller], 1775: 143, no. 21

Remarks: The identity of T. exiguella is very uncertain. The original description reads "Düsterer Sch[metterling] mit weißlichtem Querstriche", foodnote: "**Mit gespitzten Oberflügeln. (Alis cuspidatis.)", which is clearly different from the description of T. fibulella on the same page: "Purpurschielender Sch[metterling] mit 1. goldenem Gemeinmackel". Nevertheless, C. fibulella may be fuscous with a nearly white, but always incomplete cross fascia.

Habit:

 
: Salzburg, Nockberge, Lungau, from the Katschberg to the Aineck summit, 1700 m, 1994.07.12, leg. Kurz & Kurz, coll. Michael Kurz : Salzburg, Flachgau, Thalgau, Schober, 1988.06.24, leg. et coll. Michael Kurz : Salzburg, Flachgau, Thalgau, Schober, 1988.06.24, leg. et coll. Michael Kurz  
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
 

Description of adults: Examined: 12 , 4 . Forewing length: 3.6 - 4.0 mm, 4.0 - 4.4 mm. Head black-brown; vestiture of hair-like scales on the head distant, black; eyes black, 0.25 - 0.3 mm in diameter; distance of eyes (frontally) about 1.5 times the diameter of an eye; labial palpi directed forwardly and downwardly, diverging, about 0.3 mm long, densely and bushy scaled, black; proboscis densely scaled from base to about half of its length, bronzy golden; antennae of male about 1 1/4 of forewing length, with tooth-like structures on both sides of each segment in the basal half; antennae of female about of forewing length; in both genders antennae brown basally, coppery shining, distally bronzy golden, the distalmost third with silvery-white, smooth scaling; thorax bronzy golden to reddish bronzy golden; mesothorax purple posteriorly; tegulae of the same colour, also purple posteriorly; forewings bronzy golden to reddish golden, sometimes purple at costa, often without any markings, but often also with light yellowish to golden markings: The main branches of the veins sparsely mixed with light yellow scales; a longitudinal area anteriorly of the inner margin, reaching from basis to 1/3 of forewing length, also sparsely mixed with yellow scales; an indistinctly bordered, partly interrupted cross fascia at about 3/5, reaching from inner margin to the center of the wing; fringe bronzy golden to reddish golden; hindwings, except basally, with moderately broad scales, nearly completely covering the wing membrane; hindwings brownish, basally bronzy golden shining, distally often with intensive purple shimmer; apex bronzy golden again; anterior margin silvery white in a slender stripe from the basis to 2/3; fringe bronzy golden to reddish golden; underside brown, with bronzy golden shimmer, without any markings; fringe of similar colour; lateral parts of the thorax and legs shining bronzy golden, femora and especially tibiae partly with purple shimmer; foretibia with long epiphysis; midtibia with a pair of spurs at the distal end; hindtibia inflated, with a pair of spurs each at 1/2 and at the distal end, as well as with a tuft of long, fine, hair-like scales; abdomen brown, bronzy golden shining.

Distribution:

Following Karsholt & Nieukerken (2010), the species is distributed throughout Europe, except for Portugal, Ireland, Iceland, large parts of the Balkans and the large Mediterranean islands. The first record for Serbia has been published by Kurz & Horvat (2010). The species seems to be absent from Asia, since there are no records from Siberia (Dubatolov 2009) or Japan (anonymous 2009a). The vertical distribution has been recorded from near sea level to about 1800 m a.sl. (Kurz & Kurz 2010).

Biology:

 
Biotope: Carinthia, Warmbad Villach, way to the ruins of Federaun, 2007.05.12 Serbia, Vojvodina, near Karavukovo, 2007.05.18 Carinthia, Warmbad Villach, way to the ruins of Federaun, 2007.05.12  
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
 

The species inhabits diversified edges and clearings of woods, which are rich in grasses and herbs and include the foodplant of the larvae, Veronica chamaedrys. The imagines are frequently sucking on this plant too. They are day-active and mostly gregarious. The imagines fly in one generation per year from May to July, depending on the altitude (Kurz & Kurz 2010).

Diagnosis:

   
C. fibulella : Salzburg, Nockberge, Lungau, from the Katschberg to the Aineck summit, 1700 m, 1994.07.12, leg. Kurz & Kurz, coll. Michael Kurz C. leucocerella : Lower Austria, Marchfeld, Oberweiden, Sandberg, 2009.05.03, leg. Michael Kurz, Marion Kurz & Erich Hübl, coll. Michael Kurz    
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
   

C. fibulella is quite similar to Cauchas leucocerella (Scopoli, 1763) when comparing the forewing patterns. In C. leucocerella, the incomplete median fascia is mostly better developed and more contrasting. Somewhat distally of the fascia, a distinct, yellowish-white costal spot is normally present. A light, indistinct, subbasal spot, often developed in C. fibulella, is usually missing in C. leucocerella. The vestiture of hair-like scales on the head is black in both sexes of C. fibulella, whereas in C. leucocerella it is conspiciously orange in the and mixed blackish and yellowish-orange in the . The hindwings of C. leucocerella are distinctly lightened towards the base, whereas in C. fibulella, they are of uniform colour.

Worth knowing:

Sources:

anonymous 2009a. An Identification Guide of Japanese Moths Compiled by Everyone. URL: http://www.jpmoth.org [online 26 April 2010].
anonymous 2009b. Das Naturhistorische Museum Wien. Forschung. 2. Zoologische Abteilung (Entomologie). Geschichte. URL: http://http://www.nhm-wien.ac.at/Content.Node/forschung/2zoo/geschichte.html [online 15 September 2009].
Denis, M. & I. Schiffermüller 1775. Ankündigung eines systematischen Werkes von den Schmetterlingen der Wienergegend, herausgegeben von einigen Lehrern am K.K. Theresianum. Augustin Bernardi, Wien. 322 pp.
Dubatolov, V. V. 2009. Collection of Siberian Zoological Museum: Adelidae. http://szmn.sbras.ru/Lepidop/Incurvar.htm [online 26 April 2010].
Karsholt, O. & E. J. van Nieukerken 2010. Adelidae. In - Karsholt, O. & E. J. van Nieukerken (eds.). Lepidoptera, Moths. – Fauna Europaea version 2.2., http://www.faunaeur.org [online 06 July 2010].
Kurz, M. A. & L. Horvat 2010. New and interesting Lepidoptera from the Balkans (Serbia, Croatia, Bosnia and Montenegro). Mitteilungen aus dem Haus der Natur. in press
Kurz, M. A. & M. E. Kurz 2000–2010. Naturkundliches Informationssystem. – URL: http://www.nkis.info [online 08 July 2010].

Publication data:

history:
Kurz Michael: 2010.01.06
Kurz Michael: 2010.04.04
Kurz Michael: 2010.07.08
Kurz Michael: 2013.11.13
Kurz Michael: 2015.08.06
not reviewed

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