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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: Biol J Linn Soc Lond. 2013 Oct 1;110(2):291–304. doi: 10.1111/bij.12134

Table 2. Biometrical characters of three long-tongued species (Eurybia elvina, Eurybia lycisca, Eurybia unxia) and three short-tongued species (Euselasia aurantia, Mesosemia asa, Sarota gyas) were measured.

Biometrical parameters Scale unit Method of measurement
Body size
 Body length mm Digital caliper
 Head capsule volume mm3 μ-CT, 3D-reconstruction
Suction pump
 Volume of compressors mm3 μ-CT, 3D-reconstruction
 Volume of dilators mm3 μ-CT, 3D-reconstruction
Haemolymph pump
 Number of external stipes muscles μ-CT, 3D-reconstruction
 Volume of external stipes muscles mm3 μ-CT, 3D-reconstruction
 Volume of internal stipes muscles mm3 μ-CT, 3D-reconstruction
Galea
 Cuticula volume mm3 Serial semithin sectioning, 3D-reconstruction
 Food canal volume mm3 Serial semithin sectioning, approximated to truncated cone
 Galeal volume mm3 Serial semithin sectioning, 3D-reconstruction
 Intragaleal muscle volume mm3 Serial semithin sectioning, 3D-reconstruction
 Number of sensilla styloconica Light microscopy
 Number of sensilla trichodea Light microscopy
 Proboscis length mm Photographic images, IMAGEJ
 Tip length mm Light microscopy

Two individuals per species were studied. CT, computed tomography.