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 inopinata A. & Z. Laštuvka, 1991

(zoological nomenclature: valid name, available)

General information:

Stigmella inopinata A. & Z. Laštuvka, 1990: 197.
Type locality: Slovakia, Slovenský kras, Jablonov nad Turnou
Type: Holotype : Slovenský kras, Jablonov nad Turnou, e.l. VI 1989 (R 7.VI.1989, Spiraea media), leg. et coll. A. Laštuvka

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

Description of adults (following Laštuvka & Laštuvka, 1990): Forewing length: 2.0-2.2 mm, 1.9-2.4 mm; number of antennal segments: 29-31, 23-25; head rusty yellow, eyecaps ochreous yellow; antennae, forewings, thorax, abdomen and legs unicolorous, almost black, intensively metallic shining; hindwings black-grey; underside lighter.

Distribution:

The species is known so far from Czechia, Slovakia, Georgia and Azerbaijan (Nieukerken 2017).

Biology:

The species is bivoltine with larvae in June and September and adults in April and end of June till early July (Laštuvka & Laštuvka 1990).

Stages in development:

Egg. The egg is laid on the underside of a leaf of Spiraea media (Laštuvka & Laštuvka 1990).

Larva. The larva is light yellow. The mine starts with a narrow, straight corridor with regular frass line. It widens abruptly to a blotch with central frass deposition.

Anatomy:

genitalia. Vinculum much concave; valve with truncated tip; distal extension of valve shortened, in ventral aspect behind valve; gnathos with extended horizontal element, with long distal and broad proximal extensions; uncus with two pegs (Laštuvka & Laštuvka 1990).

genitalia. Segment 8 with dense hairs; apophyses posteriores proximally sledgehammer-like widened; corpus bursae with medium-sized accessory sac with distinct ribs; proximal half of corpus bursae with distinct surface structure (Laštuvka & Laštuvka 1990).

Diagnosis:

Stigmella inopinata is distinguished from Ectoedemia spiraeae Gregor & Povolny, 1983, which also feeds on Spiraea media, by the absence of the silvery-white mid-fascia on the forewing and by its bivoltinism (E. spiraeae is univoltine only with larvae in autumn following Laštuvka & Laštuvka 1990).

Phylogeny: Following Laštuvka & Laštuvka 1990, the species seems to be related to members of the oxyacanthella- and paradoxa-species-groups, is distinguished readily however by the structure of the male and female genitalia.

Worth knowing:

Sources:

Laštůvka, A. & Z. Laštůvka 1990. Stigmella inopinata sp. n. und Parornix mixta (Triberti) in Mitteleuropa (Lepidoptera). Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 38: 197-203.
Nieukerken, E. J. van 2017. Nepticulidae and Opostegidae of the world. - URL: http://nepticuloidea.info/ [online 2017.03.10].

Publication data:

history:
Kurz Michael: 2017.07.12
not reviewed

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