Posted by Igor Grichanov on 07-05-2007 12:33
#6
There are two sister species that can not be distinguished without microscope:
? 2nd and 3rd segments of mid tarsus distinctly laterally compressed, appearing somewhat dilated in lateral view; swelling on hind tibia more extended lengthwise, without tubercle at middle; postpedicel not more than 1.5 times as long as high at base 55
55. Swelling on hind tibia posteriorly with small roundish patch at middle de-void of black setulae and covered with microscopic pale yellow pile which is continued down to tip of tibia in a moderately broad posterodorsal stripe; scutellum with rather numerous pale hairs on hind face in more than one fringe; 5.0-6.0 pennatus Meigen
? Mid area of hind tibial swelling without pale yellow pile, but almost entirely covered with tiny black setulae, the longitudinal stripe of pale yellow pile to tip of tibia appearing extremely narrow from certain points of view; scutel-lum with only single sparse fringe of about 10 pale hairs on lower margin of hind face, sometimes 2-3 isolated hairs above; 5.0-6.5
subpennatus d'Assis Fonseca
Dolichopus pennatus Meigen, 1824: Syst.Beschr. 4: 90 ** Type locality: not given. Palaearctic: Sweden, Finland, Norway, Denmark, Ireland, England, Germany, Austria, Netherlands, Belgium, France, Switzerland, Italy, Spain, Portugal, Poland, Hungary, ?Macedonia, Czech, Slovakia, Romania, ?Croatia, ?Bosnia and Herzegovina, ?Slovenia, ?Yugoslavia, Belarus, Estonia, Russia, Georgia, Ukraine, Mongolia *
Dolichopus subpennatus d'Assis Fonseca, 1976: Ent.monthly Mag. 111: 23 ** Type locality: England: Inverness-shire, Spey Bridge. Palaearctic: England, Ireland, Norway, Sweden, Denmark, Austria, Belgium, Netherlands, France, Luxembourg, Germany, Poland, Czech, Slovakia, Romania, Russia *