Head, body, and appendages chaetotaxy
Chaetotaxic systems attempt to labeling each chaeta along the body, where the label indicates a specific chaeta and its position in the body of the animal, then a qualitative description is made (e.g . spinelike chaeta, macrochaeta, club shaped sensillum, palmate, serrate, lanceolate), bringing subjectivity in the interpretation of a specific chaeta labeling, and by the many different adjectives that can apply for a given shape, depending on the author.
Here we map regions that can be compared in different taxonomic groups, the chaetal fields, within each head and body segment (Fig. 1-2), and to appendages (Figs. 3-5), and refer to a shape for the chaeta in an image data set, the chaetae bank, with images of each kind of chaeta found in the taxon (Fig. 8).
The chaetotaxy of individualized chaeta is replaced by a code describing the total number of chaetae in the chaetal field, and the qualitative description of the different kind of chaetae found in each chaetal field, is replaced by the respective number in the chaetae bank that represents the actual observed shape and size, to compose the morphological unit definition (see Table 1).