Badister dilatatus
, North Elmham, 24-Jun-19 (A) (1).jpg)
, North Elmham, 24-Jun-19 (A) (2).JPG)
, North Elmham, 24-Jun-19 (A) (3).JPG)
male Badister dilatatus showing close-up of pronotum and aedeagus, North Elmham (Norfolk, UK), 24th June 2019
I was a little careless keying this and missed the asymmetrical mandibles. Ending up at Calathus but the specimen clearly not matching any species within that genus I realised I'd gone wrong. Useful to have made the mistake I have previously feared I would make, and reassuring that it leads to a dead-end when I do (so hopefully I haven't done before). The shape of the mandibles were best appreciated from in front, though I should have at least noticed the bulge at the base of the left mandible when looking from above. This beetle was about 4.7mm long.
, North Elmham, 23-Jun-23 (A) (1).jpg)
, North Elmham, 23-Jun-23 (A) (2).jpg)
, North Elmham, 23-Jun-23 (A) (5).jpg)
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, North Elmham, 23-Jun-23 (A) (8).jpg)
, North Elmham, 23-Jun-23 (A) (9).jpg)
, North Elmham, 23-Jun-23 (A) (10).jpg)
, North Elmham, 23-Jun-23 (A) (11).jpg)
male Badister dilatatus showing close-up of pronotum, mandibles (3 views, 2 from in front and 1 from above), elytra tip and aedeagus, North Elmham (Norfolk, UK), 24th June 2019