COMPARATIVE ANATOMY OF THE INSECT TRACHEAL SYSTEM PART 1: INTRODUCTION, APTERYGOTES, PALEOPTERA, POLYNEOPTERA Author Herhold, Hollister W Author Davis, Steven R Author Degrey, Samuel P Author Grimaldi, David A text Bulletin of the American Museum of Natural History 2023 2023-03-31 459 1 1 184 http://dx.doi.org/10.5531/sd.sp.55 journal article 10.5531/sd.sp.55 eb1717dc-9526-481c-a859-7ca8fd036425 0003-0090 7730159 Calopteryx maculata “Ebony jewelwing” Figures 38 , 39 (lateral, anterior, posterior), 40 (dorsal), 41 (ventral) Plates 21 (lateral), 22 (dorsal), 23 (ventral) A single damselfly was scanned at 19 µm, which should have been sufficient to capture details of abdominal tracheae; however, this specimen was frozen to -20° C early in the study. As small tracheae were likely infilled, this specimen is not described in detail, but three-dimensional models are included in the online supplementary digital data. The thoracic tracheae appear to be very similar to the aeshnid, along with extensive air sacs. FIGURE 30. Aeshnid immature with longitudinal trunks labeled. Lateral (left), dorsal (middle), and ventral (right) views. FIGURE 31. Odonata : Aeshnidae anterolateral view. FIGURE 32. Odonata : Aeshnidae posterolateral view. FIGURE 33. Odonata : Aeshnidae anterodorsal view. FIGURE 34. Odonata : Aeshnidae posterodorsal view. FIGURE 35. Odonata : Aeshnidae anteroventral view. FIGURE 36. Odonata : Aeshnidae posteroventral view. 62 BULLETIN AMERICAN MUSEUM OF NATURAL HISTORY NO. 459 FIGURE 37. Aeshnidae with valve. Direct screen capture from 3D Slicer. It is unclear whether there are four paired abdominal trunks as in the dragonfly, but it seems likely. Further studies should focus on Zygoptera in addition to more dragonfly specimens to verify and solidify tracheal patterns in the flight motor and abdomen.