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Pan’s progress

All my consultancy fieldwork is now finished for the 2012 season and the next few months will be spent working through and identifying my samples of invertebrates, as well as writing up reports. These samples contain many specimens which received little more than a glance in the field before being pooted, in the knowledge that they’d need microscopic scrutiny or dissection to be identified. So there’s plenty of potential for surprises, as my sample from an Oxfordshire site on 14th June proved …

This blog profiles the 9 ticks I’ve added to my pan-species list between Friday 24th August and setting off for the Sandwich Bay Coleopterists’ Meeting on Friday 31st (more on that later!). Dave Gibbs has been posting photos of each of his ticks on the Pan-species Listers facebook page which I’ve been following with interest. His 9,967th tick was the Short-billed Dowitcher yesterday at Lodmoor. So here is another instalment of my personal progress through the massive biodiversity of Britain …

Gyrophaena joyi (Staphylinidae: Aleocharinae), 1 male, Alfoxton Wood, Somerset, 19th Aug 2012.
From quite fresh Dryad’s Saddle brackets. A Nationally Scarce species. Dave Boyce has already found it on several occasions in Somerset.

Gyrophaena joyi

Aloconota sulcifrons (Staphylinidae: Aleocharinae), Dorset, 22nd August 2012.
Grubbing in wet woodland clearing. A common species, or at least one with no conservation status. No faffing about keying this out – it is one of the Athetini that has a diagnostic pronotal hair-pattern, confirmed by dissection.

Aloconota sulcifrons

Ptenidium laevigatum (Ptiliidae), Dorset, 22nd August 2012.
I’ve trapped this species on numerous occasions using subterranean traps at tree roots but a singleton suction-sampled from a tussock-sedge pedestal was the first I’d seen alive. Carding 1.1 mm long beetles doesn’t always end up as well as this!

Ptenidium laevigatum

Orthonevra nobilis (Syrphidae), 1 male, Newlands, Heanor, 28th August 2012.
Sweeping in wet woodland. A fairly common wetland hoverfly.

Orthonevra nobilis

Psenulus pallipes (Crabronidae), 1, Oxfordshire, 14th June 2012, det D.J. Gibbs.
Beaten off Lime branches in parkland. A fairly common wasp.

Psenulus pallipes

Elodes tricuspis (Scirtidae), 1 male, Oxfordshire, 14th June 2012.
Now this was a big surprise! Elodes tricuspis is Britain’s rarest scirtid and Garth Foster’s (2010) Water Beetle Review was able to list all the known British records: Sherwood Forest, Nottinghamshire in the 19th Century; Windsor Great Park in 1934; Frensham, Surrey, in 1954; Brampton Bryan, Herefordshire in 1981; Parham Park, West Sussex in 1996 (twice); and Mid-west Yorkshire in 1999. So this was the 8th British record and the first for Oxfordshire. It is regarded as Vulnerable. Map here. This one was swept under wet woodland canopy in a parkland.
The four British species of Elodes are only really separable by dissecting males so on this occasion the odds fell in my favour.

Elodes tricuspis male

Lonchaea mallochi (Lonchaeidae), 1 female, Oxfordshire, 14th June 2012, det D.J. Gibbs.
Pooted off a fallen poplar trunk in wet woodland. A readily recognised family of flies with many saproxylic members. There is also a good new RES Handbook for their identification, though I still turn to Dave Gibbs for help.

Lonchaea mallochi

Scaphisoma boleti (Staphylinidae: Scaphidiinae), 1 female, Oxfordshire, 14th June 2012.
Pooted off a fallen poplar trunk in wet woodland. A Nationally Scarce (Nb) saproxylic beetle associated with fungi.

Scaphisoma boleti

Rhadinoceraea micans (Symphyta), larvae, Oxfordshire, 14th June 2012.
I’ve seen these sawfly larvae munching on Yellow Flag Iris pseudacorus leaves before but never attempted to identify them. The name Rhadinoceraea micans comes up on google if you enter “iris sawfly” but the clincher for me was a comment on iSpot by Martin Harvey with the assurance that Rhadinoceraea micans is the only sawfly that feeds on Yellow Flag.
No photo from me but here’s one: http://www.flickr.com/photos/simonhaas/3369939919/