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 irregularis Puplesis, 1994

(zoological nomenclature: valid name, available)

General information:

Stigmella irregularis Puplesis, 1994: 61.
Type locality: Crimea, 20 km W Feodosiya (Karadag reserve)
Type: Holotype : Crimea, 20 km W Feodosiya (Karadag reserve), 2.vi.1987, Budashkin, in coll. Lithuanian University of Educational Sciences, Vilnius (VPU, LEU)

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

Description of adults (Laštůvka & Laštůvka 2009): . "Wingspan 3.6–4.8 mm. Head black, frontal tuft ochreous orange; collar and scape greyish creamy. Thorax and forewing brownish black, with a greyish golden lustre; forewing underside black. Hindwing covered by black androconial scales, black also on underside. Abdomen black, legs greyish black, distal parts paler."

. "Wingspan 3.8–4.8 mm. Head black, frons ochreous orange; collar and scape greyish creamy. Thorax brown with a golden lustre. Forewing in its basal half brown, golden orange lustrous; broad, light golden transversal band with blurred inner margin; distal part of forewing brown or black, purple lustrous. Hindwing and cilia light greyish brown. Abdomen greyish brown."

Remarks:
The females were not reared, but collected together with males and are therefore assumed to be conspecific. Males from Greece, Croatia and Sicily differ from the Crimean type material by the presence of distinct androconial scales on the hindwing. This difference however, is considered to be a local variability (Laštůvka & Laštůvka 2009).

Distribution:

The species is known so far from Crimea, the Greek mainland, Crete, Rhodes, Croatia, and Sicily (Laštůvka & Laštůvka 2009).

Biology:

Adults have been collected between the end of May and late August, which indicates two generations per year or one very extended generation. The imagines were frequently found around Pyrus elaeagrifolia Pallas in Greece (Laštůvka & Laštůvka 2009).

Stages in development:

Larva: The larva is indistictly yellow. It mines the leaves of Pyrus amygdaliformis Vill. and probably also other

Pyrus sp. The mine is a narrow, later slightly dilating gallery with the frass accumulated in its firts half (Laštůvka & Laštůvka 2009).

Anatomy:

genitalia. Genital capsule 0.28 mm long; "valva pointed distally, without any internal lobes; uncus broad, hemispheric from ventral view; central process of gnathos distinctly larger than lateral horns; vinculum strongly concave; transverse bar of transtilla distinctly concave; aedeagus with numerous small cornuti, constricted in its distal half" (Laštůvka & Laštůvka 2009).

genitalia. "Length 0.33 mm. Last abdominal segments elongate; anal papillae flat; both apophyses long and slender; 8th tergite with groups of about 9 small setae on both sides, several individual setae below them; 7th segment with small groups of dense short setae and groups of very long scales laterally; corpus bursae large, ovoid, with pectinations especially in its distal part; bursa accessoria small, wrinkled" (Laštůvka & Laštůvka 2009).

Diagnosis:

By its genitalia, the species is distinguished from all other

Pyrus-feeding species. The females are very distinctive also externally. The larva is separated from other

Pyrus-feeding species by its indistinctly yellowish colour, whereas in other species the larva is either green or greenish white (in Ectoedemia atricollis (Stainton, 1857), following Laštůvka & Laštůvka 2009).

Worth knowing:

Sources:

Laštůvka, A., Z. Laštůvka 2009. Morphology, biology and distribution of Stigmella irregularis Puplesis (Lepidoptera: Nepticulidae). Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis LVII (5): 193-196
Puplesis, R. 1994: The Nepticulidae of eastern Europe and Asia. Western, central and eastern parts. Leiden, Backhuys Publishers, 291 pp. + 840 figs.

Publication data:

history:
Kurz Michael: 2017.08.02
not reviewed

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