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Re: [beemonitoring] Halictus ligatus & Halictus poeyi [2 Attachments]

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  • Sam Droege
    All: I have seen Gene s specimens and I think they are more likely H. poeyi than H. ligatus.... Although it remains untested molecularly, I have looked at the
    Message 1 of 3 , May 18, 2012
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      All:

      I have seen Gene's specimens and I think they are more likely H. poeyi than H. ligatus....

      Although it remains untested molecularly, I have looked at the extreme ranges of the complex and think that H. poeyi has different proportions to the clypeal sutures than H. ligatus that go beyond differences in F1 vs non F1 generation specimens.  Males are not so clear, but may have more pitting on the rims of the tergites in H. poeyi.

      I also think H. poeyi is more of a sand specialist than H. ligatus and that it could run well up the East coast in sand areas.

      It would be nice to test out my suppositions with molecules!!!!!

      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

           
      Landscape With The Fall of Icarus


      According to Brueghel
      when Icarus fell
      it was spring


      a farmer was ploughing
      his field
      the whole pageantry


      of the year was
      awake tingling
      near


      the edge of the sea
      concerned
      with itself


      sweating in the sun
      that melted
      the wings' wax


      unsignificantly
      off the coast
      there was


      a splash quite unnoticed
      this was
      Icarus drowning


           - William Carlos Williams





      From:Laurence Packer <laurencepacker@...>
      To:beemonitoring@yahoogroups.com, "Eugene J. Scarpulla" <ejscarp@...>
      Date:05/18/2012 12:19 PM
      Subject:Re: [beemonitoring] Halictus ligatus & Halictus poeyi [2 Attachments]
      Sent by:beemonitoring@yahoogroups.com





       
      [Attachment(s) from Laurence Packer included below]

      Greetings

      Attached is the original paper  noting some aspects of the distribution of these two plus another one that compared phenology from Rock Hill, where they occurred symaptrically - alas, almost identical patterns.

      An update based upon more genetic data was published in the Byron Alexander memorial volume, from the natural history museum, univ. kans.  At that time, the most northern record of poeyi was from Williamsburg Virginia, with ligatus occurring in DC, Natural Bridge, Fancy Gap and Nettleridge Virgina.  Given global warming, the possibility that ligatus is being replaced (or added with) poeyi in some parts is possible (they are sympatric in many places but I did not find them together close to you, but did find them together in NC.

      I do not have this as a pdf, if there's interest I can arrange to get it scanned?

      Hope this is of some interest.  Unfortunately, I know of no morphological way of differentiating them, though people have tried - even morphometric data did not separate them well.  They are very divergent genetically though.  It's an interesting problem.

      Perhaps someone on the list has found some morphological means of separating them?

      cheers

      laurence

      --- On Fri, 5/18/12, Eugene J. Scarpulla <ejscarp@...> wrote:


      From: Eugene J. Scarpulla <ejscarp@...>
      Subject: [beemonitoring] Halictus ligatus & Halictus poeyi
      To: beemonitoring@yahoogroups.com
      Received: Friday, May 18, 2012, 11:44 AM

       

      Is anyone currently doing any DNA research with the two cryptic species Halictus ligatus Say and Halictus poeyi Lepeletier?  If so, I have a specimen set that might be of interest to you and might benefit you as well as me.

       

      In 2009, I conducted a yearlong bee bowl survey on Hart-Miller Island in the northern Chesapeake Bay.  I ran one 20-bowl transect in each of six habitats on 18 sampling dates.  As part of that effort, I collected 410 specimens of H. ligatus/poeyi that ranged over time from 4 April to 29 November with three collection peaks on 19 May, 7 August, and 21 October.  The sampling date data are as follows:

       


       
      Mar

      07

      Mar

      17

      Apr

      04

      Apr

      18

      May

      06

      May

      19

      May

      30

      Jun

      13

      Jul

      02

      Jul

      20

      Aug

      07

      Aug

      24

      Sep

      07

      Sep

      21

      Oct

      04

      Oct

      21

      Nov

      09

      Nov

      29

      Total
      Total
       
       
      1
      16
      8
      80
      18
      9
      12
      14
      82
      28
      10
      19
      14
      77
      21
      1
      410
      Female 
      1
      16
      8
      80
      18
      9
      12
      12
      72
      26
      10
      15
      12
      23
      18
      1
      333
      Male      
      2
      10
      2
      4
      2
      54
      3
       
      77

       

      I also have the data per transect.

       

      I would be interested in knowing whether one or both species occur on the island.  If there are two species, I would be interested in knowing if the species show any temporal or habitat partitioning.

       

      If my specimens might be of interest to you, please contact me.  Thanks.

       

      Gene

       

      Gene Scarpulla

      Editor, The Maryland Entomologist & the Phaƫton

      Bowie, Maryland

      ejscarp@...

       



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