Lasioglossum sexnotatum?

Lasioglossum sexnotatum?

Postby Jann Wuebbenhorst on 05 Apr 2018, 11:53

This Lasioglossum was photographed on 03rd Apr 2018 in a sandy garden in the eastern part of Lower saxony (Germany), visiting Eranthis hyemalis; size about 11 mm.
I know Lasioglossum species are often indiscernible on field photos, but maybe the detailed photos can help in this case.
I add some details of tergites 1 and 2, the head, the mesonotum, the mesopleuron and the upper part of the propodeum.

L. sexnotatum is supposed to be very rare in Lower Saxony, but in some adjacent federal states of Germany it is not that rare.

best wishes,
Jann
Attachments
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Last edited by Jann Wuebbenhorst on 05 Apr 2018, 11:57, edited 2 times in total.
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Re: Lasioglossum sexnotatum?

Postby Jann Wuebbenhorst on 05 Apr 2018, 11:55

some more photos
Attachments
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20180403_1218kk.JPG
20180403_1140detail.JPG
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20180403_1157detail.JPG
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Re: Lasioglossum sexnotatum?

Postby Darek Ogrodnik on 10 Apr 2018, 14:39

Sexnotatum seems correct but I'm not certain about it.
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Re: Lasioglossum sexnotatum?

Postby Jann Wuebbenhorst on 12 Apr 2018, 21:25

Many thanks for your valuation, Darek.
Is it possible to say which other species must be considered?
Here in Northern Germany, there are not as many bee species as in Southern Germany, Switzerland, Austria or eastern european countries.
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Re: Lasioglossum sexnotatum?

Postby Darek Ogrodnik on 14 Apr 2018, 10:41

It also might be L. costulatum
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Re: Lasioglossum sexnotatum?

Postby Jann Wuebbenhorst on 15 Apr 2018, 16:10

Thank you very much again, Darek.
L. costulatum should appear about 4 weeks later than L. sexnotatum and not before the beginnung of May, following Amiet et al. (2001). And L. costulatum was thought to be extinct in Lower Saxony, but since 2005 there were three new records.
I have observed Lasioglossum looking like this last year visting Asparagus and Papaver, but not yet Campanula.
So I think overall L. sexnotatum (though also rare in Lower Saxony) is more likely - but I cannot be sure.
I hope next time I manage to collect one of these.
best wishes, Jann
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Re: Lasioglossum sexnotatum?

Postby Christian on 15 Apr 2018, 18:02

You cannot be sure by this photo, because all important characters (propodeum, punctation of tergite I etc.) are not visible.

Best wishes, Christian
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Re: Lasioglossum sexnotatum?

Postby Jann Wuebbenhorst on 17 Apr 2018, 14:39

I think the punctuation of Tergit 1 is visible in photo 9 (base sparsely punctate, even and shiny between the punctures; apical depression densely punctate) - for me it looks the same as in this photo by Steven Falk:
https://www.flickr.com/photos/63075200@N07/15401260711/in/album-72157647924134795/
The upper area of the propodeum is visible in nos. 4 and 5.
So I thought it was worth a try :)
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