Descriptor : ANTENNA: antennal XI/X ratio, length of segment XI divided by length of segment X - Range
Descriptor type : categorical
Culicoides antenna articles are compounded of 15 segments. The first one, the scape, is ring-like and is hidden by the greatly enlarged second one, the pedicel. Flagellar articles started from the segment III to XV. In the female, the 8 firsts (from III to X) are shorter than the 5 lasts (from XI to XV segments are elongated). Antennal ratio "XI/X ratio" is the length of the first elongated segment (XI) divided by the last short segment (X). Here, only an estimate of the ration is asked, no measures required.
This observation can be done with a magnification of x40
ANTENNA: antennal XI/X ratio, length of segment XI divided by length of segment X - Range
ANTENNA: antennal XI/X ratio, length of segment XI divided by length of segment X - Range
