Posted by ESant on 14-01-2026 13:50
#1
Hello,
I photographed this fly in the Gennargentu Mountains, Sardinia (NU), Italy, 1620m a.s.l. on May 13th 2025. I think it is a
Bibio, and looking at the species recorded for Sardinia the ones that look most similar to me are
B. marci and
B. sardocyrneus. In Haenni (2009) I read that males of the two species are distinguished based on the morphology of the hind tibiae and tarsi, so I wonder if these pictures are enough to choose one of the two options.
Thank you in advance,
Emanuele
Posted by eklans on 14-01-2026 14:23
#3
I compared your fly with my
B. marci and according to Haenni I'm quite sure that it is the
Bibio sardocyrneus indeed: the hind tarsomeres are distinctly inflated while parallel-sided in
B. marci. I also see that your fly's pilosity is more brownish than in
B. marci as are the wings.