32.002 BF667 – Depressariidae – Depressariidae – Semioscopis steinkellneriana – Black-marked Diviner

32.002 BF667 – Black-marked Diviner – Semioscopis steinkellneriana – ([Denis & Schiffermüller], 1775)

Adult Micro: CAT 2 – Can be confused with other species – Leaf-miner: CAT A – Recorded accepted without the leaf or a photo – Larval Case: C1 – Distinctive Species –

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– click for Specific Verification Guidelines

– Uncertain/Unknown – Insufficient Data

Taxonomy: Micro >> Depressariidae >> Depressariinae

Other Name/s: Dawn Flat-body

ID Difficulty: amber

– care required in the identification process, as confusion with similar species is likely – quality photographs required.
Confusion Species: Semioscopis avellanella – (Early Diviner)

ID pointers: The forewing is a light grey to light brown often with a rosy tinge and black flecks. The most motable feature is a dark, downward streak near the middle of the forewing, which distinguishes it from similar Semioscopis avellanella (the streak starts at the wing base).

Distribution: Uncertain – insufficient data – 1985 – Poker’s Lees, nr. Melbourne 12/4/2004 ; Calke Park 2007; 1 attracted to MV Light 19/3/2026 Belper

General Comment: None

Flight Period: March / April / May – Primarily a dawn species flying from first light until sunrise. Males may be seen flying on sunny mornings while female fly at night and are attracted to light.

Moth Activity: Cathemeral – and is attracted to light

*** Last updated on 29 March 2026 by RP ***

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Wingspan: 18-23mm

Food Plant: Blackthorn & Hawthorn

Last Recorded Year: 2026

First Recorded Year: 1997

Last Recorded By – Dave Evans

Last Recorded General Area – Belper

Possible Future Content

Images of Interest

Semioscopis steinkellneriana – 19th March 2026 – Belper – Dave Evans

Image Gallery

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Temporal Distribution Chart

Adults: (between 1997 - 2026)

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This chart summarises all available historical occurrence records collated by ISO week of the year. It reflects recorder effort and sampling distribution as well as true biological activity, and should be interpreted as an indicative pattern of seasonal occurrence rather than a statistically controlled abundance or phenology model.