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

Heliozela lithargyrellum (Zeller, 1850)

(zoological nomenclature: valid name, available)

General information:

Tinagma lithargyrellum Zeller, 1850: 158.
Type locality: Tuscany, Montenero near Livorno
Type: Syntypes in coll. NHM, London?

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

   
: Italy, Sardegna, Puntaldia, 1996.05.08, leg. Kurz & Kurz, coll. Michael Kurz : Croatia, Dalmatia, near Dubrovnik, 2003.05.03, leg. Zeller & Kurz, coll. Michael Kurz    
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
   

Description of adults: Examined: 6 , 4 . Forewing length: 2.3 - 2.8 mm, 2.2 - 3.0 mm. Head smoothly scaled, more or less brown-grey, bronzy golden shining; labial palpi 0.15-0.2 mm long, downwardly directed, of the same colouration; eyes semiglobular, black-brown; antennae about 7/10 (), respectively, 2/5 () of forewing length, filiform, brown-grey, bronzy golden shining; thorax light brown-grey, bronzy golden to whitish golden shining; tegulae brown-grey anteriorly, along outer and posterior margin lightenend whitish golden, shining; forewings at basis indistinctly black-violet, otherwise light brown-grey to nearly white, intensively light golden shining; a very indistinct, small white spot at inner margin at 1/2, seldom reaching across 1/4 of forewing width, almost triangular; a somewhat smaller, similar spot at 1/5 at inner margin; between these spots, inner margin often lightened whitish; fringe of ground colour; hindwings completely covered by broad scales, brown-grey, darkened towards apex, bronzy golden shining; fringe light grey, whitish golden shining; underside of forewings more or less dark brown-grey, coppery shining; basal 1/5 irregularly ochreous with silvery glance; fringe at apex often darker brown-grey, otherwise also ochreous, lightend whitish at the position of the spot at inner margin at 1/2; underside of hindwings grey-brown with coppery shimmer; fringe like on upperside; underside of thorax and legs light grey to white with intensive whitish golden glance; foretibiae and tarsi somewhat darker; foretibia with epiphysis; midtibia with a distal pair of long spurs; hindtibia flattened dorso-ventrally, with long duft of hair-like scales and a pair of spurs each at about 0.4 of tibial length and at distal end; all spurs violet-brown outwardly, ligth grey inwardly, silvery shining; abdomen dorsally brown-grey, bronzy golden shining, ventrally light grey with whitish golden glance.

Distribution:

Following Karsholt & Nieukerken (2013), the species is recorded from France, Italy, Corse and Sicily only. Furthermore, it occurs in Sardinia, Croatia and Spain (Mallorca). Vertically, the distribution is documented from near sea-level to about 500 m a.s.l. (Kurz & Kurz 2015).

Biology:

The animals swarm around Quercus ilex in Mediterranean macchia during day-time.

Stages in development:

Larva. Most probably, the larvae feed singly in the leaves of Quercus ilex, where they first mine the midrib of the leaf and finally make a small blotch aside the midrib. From this blotch, they cut out an oval excision, with which they fall to the ground. In this cocoon, pupation takes place too.

Anatomy:

 
-genitalia, prep.-no. 688, M. Kurz: Italy, Tuscany, Lorenzana, Laura, 1995.05.07, leg. H/Z/K, coll. Michael Kurz -genitalia, saccus, prep.-no. 688, M. Kurz: Italy, Tuscany, Lorenzana, Laura, 1995.05.07, leg. H/Z/K, coll. Michael Kurz -genitalia, aedeagus, prep.-no. 688, M. Kurz: Italy, Tuscany, Lorenzana, Laura, 1995.05.07, leg. H/Z/K, coll. Michael Kurz  
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
Picture from: Kurz Michael
Detailed view
 

Diagnosis:

H. lithargyrellum is very similar to Heliozela sericiella (Haworth, 1828), with which it is obviously closely related. The animals mostly are lighter in colouration than sericiella, often nearly white, with more intensive glance. They are mostly also smaller.

Worth knowing:

Sources:

Karsholt, O. & E. J. van Nieukerken 2013. Heliozelidae. In - Karsholt, O. & E. J. van Nieukerken (eds.). Lepidoptera, Moths. – Fauna Europaea version 2.6.2, http://faunaeur.org/ [online 13 July 2015].
Kurz, M. A. & M. E. Kurz 2000–2015. Naturkundliches Informationssystem. – URL: http://www.nkis.info [online 03 August 2015].
Zeller, P. C. 1850. Verzeichniss der von Herrn Jos. Mann beobachteten Toscanischen Microlepidoptera. Fortsetzung. – Entomologische Zeitung 11: 139-162.

Publication data:

history:
Kurz Michael: 2015.08.05
Kurz Michael: 2015.08.20
Kurz Michael: 2015.12.17
not reviewed

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