35.072 Monochroa divisella (Douglas, 1850)

Status and Distribution

Rare, mainly a moth of the Fens and Broads of East Anglia but since 1989 it has only been recorded at one of these sites (in 2010). There have been a few other well scatttered, single records from elsewhere in England (Somerset in 1936, Yorkshire in 1950 and Dorset in 2001), the latter at light as a possible vagrant.

National Status: 

pRDB 1

Bradley & Fletcher no: 

745
Photo courtesy of UK Moths.
Photographer: Jon Clifton
Location: Hickling Broad, Norfolk

Provisional Map

Maps updated with all data received by February 2016.

    Imago

    Monochroa divisella (Photo: J Clifton)

    Dissection Group

    Foodplant and Larval Feeding Signs

    Unknown.

    In Europe reported on Iris spp., mainly Iris pseudacaros the larva being present during May to early June. See Prins, W. De (2005): Monochroa divisella, a new species for the Belgian fauna (Lepidoptera: Gelechiidae). — Phegea 33 (1): 37-40.

    In De Prins 2005 it is stated, "The caterpillar of M. divisella makes a deep blotch mine in the leaves of Iris sp., mainly Iris pseudacorus, and stays in the mine until it is full-fed (Hering 1957: 567). It prefers fenland and similar damp biotopes (Bland et al. 2002: 93). Doets (1949) wrote that he found the mines only on plants growing under Salix trees (Ellis 2003). This seems to be case in the Belgian locality as well (M. Jacobs, pers. comm.)."

    Habitat

    Fens and marshes.

    Finding the Moth

    Larva: unknown in the British Isles. In Europe the larva makes a full depth blotch mine on Iris in May and early June.

    Adult: comes to light.

    Similar Species

    One of the largest Monochroa spp. (wingspan 15-16mm) with two prominent blackish spots on each wing and rather contrasting lighter and darker buff upper third (lighter) and lower two thirds (darker) to the forewings.

    Larval Occurrence

    Larval Occurrence

    Flight Period

    Flight Period

    Reported as being on the wing in June and July but there are very few records with full dates on the Scheme database.

    Earliest: 29th June 2010 (VC27)

    Latest: 1st August 1891 (VC29)