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TABLE 1. Table of the characteristics of the different pycnofibre types.

Pycnofibre type Occurrence General characteristics Abundance and special features Examples of Figures
1st type:
Simple-shaped impressions

-dorsal to the dorsal vertebral column
-ventral to the zeugopodia of the right wing
-ventral to the cervical vertebral column

-elongated, curved and largely unbranched
-commonly intersections or overlaps
-high variability of curvature and orientation depending on the body region

-high; the predominant type
-insertion from a striking indent at the dorsal vertebral column
-mane-like appearance dorsal to the dorsal vertebral column

Figure 4A, 4C, Figure 5A, 5B, Figure 7C, Figure 8C, Figure 9B
2nd type: bifurcations

-anterior part of the dorsal vertebral column
-ventral to the zeugopodia of the right wing near the metacarpo- phalangeal joint

-two side branches branching off from a longer main branch
-very characteristic Y
-shape

-at least two occurrences, maybe even a third one on the counter slab

Figure 5A, 5B, Figure 6G, Figure 8C, 8E
3rd type: trident

-ventral to the zeugopodial bones of the right wing
-ventral to the cervical vertebral column?


-terminal bifurcation consisting of three different side branches
-side branches
-more or less of equal length

-rare, one certain occurrence and one potential

Figure 6A, 6C, 6D, 6F, Figure 9B
4th type: main branch with caudally bent side branches

-ventral to the zeugopodia of the right wing

-at least one side with several side branches bent caudally
-slightly different length of the side branches

-unique occurrence
-unusual symmetry with the side branches only at one side of the main branch

Figure 6D, 6F
5th type: tuft

-ventral to the zeugopodia of the right wing

-several side branches spreading out in a radiating pattern from a common starting point
-decreasing length, but increasing curvature of the side branches towards the margin
-middle side branch with a smaller bifurcation

-unique occurrence
-possibly belonging to a much larger structure or even linked with the symmetrical feather (main branch of the feather)

Figure 6C, 6D, 6H, Figure 7A
6th type: symmetrical feather

-ventral to the zeugopodia of the right wing at the articulation of the first with the second phalanx of the right wing finger

-two distinct parts: a terminal ramification consisting of several side branches and a main branch
-variable length of the side branches with the length and curvature decreasing towards the centre of the ramification

-unique occurrence

Figure 7D, 7E, 7G, 7H