oceanlis2000's picture

Possibly Bombus cryptarum

Observed: 28th July 2007 By: oceanlis2000oceanlis2000’s reputation in Invertebratesoceanlis2000’s reputation in Invertebratesoceanlis2000’s reputation in Invertebrates
IMG 8487 (3)
IMG 8496 (3)
Description:

Thanks for all your comments I have been through my photos looking for the other 2 species and think I may have found Bombus cryptarum I've put it on Observations
What do you think?

Identifications

No identification made yet.

Species interactions

No interactions present.

Comments

dshubble's picture

Bombus cryptarum

One of the B. lucorum complex - as I understand it, B. cryptarum is distinguished by a black streak running into the yellow throacic band from just in front of the wing base. There's a tiny black line on the right-hand photo, but I think the mark is thicker than this. So, personally I don't think it's cryptarum, but others may disagree...

Urophora's picture

It looks OK for cryptarum,

It looks OK for cryptarum, but I would leave it as a possible. The collar looks too wide and long for lucorum s.s., and too narrow and short for magnus. But the black 'S' is not as obvious as it should be. This group is best treated with caution as regards specific ID.

dshubble's picture

lucorum group

Do you know of any good descriptions/id guides to the lucorum group now they've been split? Neither 'Bees of Surrey' not the 1st ed of Edwards & Jenner (don't know about the 2nd ed) split them beyond lucorum.

As I understand it (i.e. going by the BWARS website), for cryptarum there's a bar running into the yellow band as I mentioned above, but I've no idea how variable this is nor how to separate out magnus.

Urophora's picture

Everything is either trivial

Everything is either trivial or highly technical. See Bertsch et al. 2004 Beitr. Ent. 54: 365-86 for original work and plates of UK cryptarum. In Benton's New Nat. book there is a cryptarum on p316 fig A, and magnus on p317 fig G. You cannot do males, and workers are usually unsafe. There is a lot of genetic/chemical research going on to clarify the morphological correlates. If in doubt, call them lucorum s.l. No one will mind.

dshubble's picture

lucorum info

Ta for the info - shall track down the refs,

Dave

oceanlis2000's picture

Possibly Bombus cryptarum

Thanks for your comments, where is the black S

Elis

Urophora's picture

See

See http://www.flickr.com/photos/insectman/130718220/, but there is variation. Usually the 'S' is obvious once you are aware of what to look for.

Martin Harvey's picture

photo link

Thanks for that link Urophora, very useful.

----
Entomologist and biological recorder

oceanlis2000's picture

Possibly Bombus cryptarum

Thanks for the comments certainly not obvious from this photo

Elis