Isotoma anglicana

    Description

    Isotoma caerulea/viridis and Isotoma anglicana are very similar and can only be reliably separated (using slide-mounted specimens) by examining the manubrial 'teeth' and setae on the dens. Isotoma viridis has a single pair of 'teeth' on the thickened apical edge of the manubrium, whereas Isotoma anglicana/caerulea have two pairs of manubrial teeth. I. caerulea has 2 basal dorsal setae on the dens, I. anglicana has 3. 

    Similar Species

    Isotoma caerulea, Isotoma viridis. 

    Identification difficulty
    Recording advice

    Confirmation requires microscopic proof of presence of two pairs of manubrial teeth and correct confirmation of manubrial setae. 

    Habitat

    Damp places.

    When to see it

    All year round.

    UK Status

    Widespread and fairly frequent in Britain.

    VC55 Status

    Status in Leicestershire and Rutland not known.

    Leicestershire & Rutland Map

    UK Map