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Lasioglossum groups

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  • Dennis E Johnson
    Hi all, Can anyone explain to me the Lasioglossum groups. Are Sensu strictu all Lasioglossum that have only one weakened cross vein? Do all Evylaeus have two
    Message 1 of 2 , Feb 3, 2012
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      Hi all,
      Can anyone explain to me the Lasioglossum groups. Are Sensu strictu all Lasioglossum that have only one weakened cross vein? Do all Evylaeus have two weakened cross veins and is this the deciding factor for this group? I have a female Halictidae that is in the Lasioglossum genus with two possibilities: L. cinctipes and L. leucozonium, but I have also selected and searched the character "Third transcubital vein only weakened". But, it allows both species even though L. cinctipes has two, I think. If I pick sub-genus Evylaeus it excludes L. leucozonium. If I pick sub-genus Lasioglossum then It excludes L. cinctipes. I'm confused. Thanks for help.

      Denny Johnson from WI
    • Sam Droege
      Hi Denny In DL guides there is a difference between what is and what appears to be. Thus for some species like L. cinctipes...the guide may keep it in the
      Message 2 of 2 , Feb 3, 2012
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        Hi Denny

        In DL guides there is a difference between what "is" and what "appears" to be.  Thus for some species like L. cinctipes...the guide may keep it in the loop even though it has 2 - weakened cross veins becuase it is often misdiagnosed in that species...thus it will come out in the guide later.

        If you want to see what subgenus a species is in then you would use the subgenus character at the bottom of the guide.

        Yes, sensu strictu is usually defined as having only 1 weakened cross vein.

        I will let Jason (if he is available) talk about all the machinations of how Evylaeus is or is not currently defined.

        Hope that helps.

        sam

        Sam Droege  sdroege@...                      
        w 301-497-5840 h 301-390-7759 fax 301-497-5624
        USGS Patuxent Wildlife Research Center
        BARC-EAST, BLDG 308, RM 124 10300 Balt. Ave., Beltsville, MD  20705
        Http://www.pwrc.usgs.gov
                                         While my colleagues can constantly enjoy the amenities of life, I have to work day and night on the investigation of a science
        that a thousand men will not be able to complete, to say nothing of the time I squander every day on scientific correspondence and so bring upon myself a premature old age.


        - Linneaus, 1761, letter to Nikolaus Joseph von Joaquin

        a



        From:Dennis E Johnson <Dermjohn@...>
        To:Bee Monitoring <beemonitoring@yahoogroups.com>
        Date:02/03/2012 05:21 PM
        Subject:[beemonitoring] Lasioglossum groups
        Sent by:beemonitoring@yahoogroups.com





         

        Hi all,
        Can anyone explain to me the Lasioglossum groups. Are Sensu strictu all Lasioglossum that have only one weakened cross vein? Do all Evylaeus have two weakened cross veins and is this the deciding factor for this group? I have a female Halictidae that is in the Lasioglossum genus with two possibilities: L. cinctipes and L. leucozonium, but I have also selected and searched the character "Third transcubital vein only weakened". But, it allows both species even though L. cinctipes has two, I think. If I pick sub-genus Evylaeus it excludes L. leucozonium. If I pick sub-genus Lasioglossum then It excludes L. cinctipes. I'm confused. Thanks for help.

        Denny Johnson from WI



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