Glabellula

Evenhuis, Neal L., 2013, New microbombyliids (Diptera: Mythicomyiidae) from Eocene Baltic and Rovno ambers, with notes on previously described amber species, Zootaxa 3731 (3), pp. 371-380 : 376

Key to species of Tertiary amber Glabellula

1. Wing with stump vein into cell bm+dm eminating from crossvein bm-cu+dm-cu (cf. Fig. 10 )......................... 2

-. Wing without such a stump vein.......................................................................... 4

2. Abominal tergites with yellow posterolaterally (Rovno)................................ G. perkovskyi Evenhuis , n. sp.

-. Abdominal tergites all black laterally...................................................................... 3

3. Antennal first flagellomere subconical, second flagellomere long, slightly less than half length of first flagellomere (cf. Fig. 6 ) (Baltic Region)...................................................................... G. electrica (Hennig)

-. Antennal first flagellomere round, second flagellomere short, less than one-third length of first flagellomere (cf. Fig. 7 ) ( Dominican Republic)................................................................. G. grimaldii Evenhuis

4. Antennal first flagellomere subconical, second flagellomere long, slightly less than half the length of the first flagellomere (cf. Fig. 6 ) (Saxon Region)............................................................. G. hannemanni Schumann

-. Antennal flagellomere spherical to elliptical, not subconical ( Figs. 5, 8 ), second flagellomere shorter than above.......... 5

5. Antennal first flagellomere elliptical (cf. Fig. 5 ) ( Dominican Republic)........................ G. brunnifrons Evenhuis

-. Antennal flagellomere spherical, not elliptical (cf. Fig. 8 ).................................................... 6

6. Costa ends just after end of vein R4+5; abdominal tergites black ( Dominican Republic)................ G. kuehnei Schlüter

-. Costa ends near midpoint between ends of veins R4+5 and M1; abdominal tergites with yellow laterally (Rovno)......................................................................................... G. aggregata Evenhuis , n. sp.

Figures

FIGURES 5 – 12. Antennae and wings of amber fossil Mythicomyiidae. Figs. 5 – 9. Antennae: 5, Glabellula brunnifrons Evenhuis; 6, Glabellula electrica (Hennig); 7, Glabellula perkovskyi, n. sp.; 8, Glabellula kuehnei Schlüter. 9, Riga toni, n. sp. Figs. 10 – 12. Wings: 10, Glabellula perkovskyi, n. sp.; 11, Carmenelectra pernigra, n. sp.; 12, Riga toni, n. sp.