orchid_b's picture

Andrena sp.

Observed: 8th April 2012 By: orchid_borchid_b’s reputation in Invertebratesorchid_b’s reputation in Invertebratesorchid_b’s reputation in Invertebratesorchid_b’s reputation in Invertebrates
Andrena sp.
Andrena sp.
Andrena sp.
Description:

I think this is either A. nigroaenea or A.carantonica aka A.scotica. The BWARS website is (as usual, I have to say) not helpful on the i/d of either, so I am relying on the unwritten crowd knowledge!

Identifications
Species interactions

No interactions present.

Comments

eucera's picture

nigroaenea/carantonica

I think the BWARS website shows quite clearly that A. nigoaenea has orange hairs on the hind tibia whereas A. carantonica has very dark hairs on the hind tib.

Perkins's mandibular characters are not the best. Neither did Perkins really appreciate the relationship between various members of the A. trimmerana group and if you have a copy of Perkins, you might find A. carantonica as A. trimmerana jacobi or similar.

Another point about the BWARS site is that it makes it quite clear that id's from pics are extremely difficult without a lot of experience. The pics were taken by contributors as examples of the bees rather than illustrating specific identification features

Stuart
Chairman BWARS
www.bwars.com

orchid_b's picture

Thanks Stuart. I thought it

Thanks Stuart. I thought it might be carantonica, but din't know about the hind tibia hair colour. I've been told that a rough propodeum is a key feature.

All I was getting at on the BWARS website was the lack of simple, basic text info on the species. Simple pointers (like this) are common knowledge among experts but newbies have to extract them (like drawing teeth) from various sources, usually pers comm., courses etc.

I agree about i/d from photos which is why it is hard to use the BWARS photos without some text notes as to what we are supposed to be looking for.

My Perkins (1912) includes A.trimmeriana var scotica, which I guessed was carantonica. But is there anything in English that you would rate as an improvement in the past 100 years or so?

Jamie from Briantspuddle

eucera's picture

Contact

Hi Jamie

There are ways we can do this I suspect.... find me on FlickR (same user name) and message me

Stuart

Stuart
Chairman BWARS
www.bwars.com