Taxa less than 1 kg Taxa less than 5 kg - PLOS

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Taxa less than 1 kg. 0.2. 0.22. 0.24. 0.26. 0.28. 0.3. 0.32. 0.34. 0.36. 0.38. R e la tiv e le g le n g th. T h e ro p o d. M ic ro ra p to r. A n c h io rn is. E p id e n d ro s a.
Thero pod

120

112

104

96

90

80

70

60

50

40

Ba sal bird s

Microrap tor

Archae opteryx

96

Basa l b irds

104

Ep ide ndro sauru s

112

A rchae opteryx

120

Anchi ornis

128

A nchio rnis

136

Epiden drosa urus

110

Basal birds

128

A rchae opter yx

144

Ep ide ndro saurus

152

144

Anch iorn is

136

Theropod

0.24 0.22 0.2 Relative leg length

0.32 0.3 0.28 0.26

The ropod

Basal birds

Archaeopteryx

E pid end rosau rus

Anchiornis

0.36

Micro raptor

152

Relative tibia length

Thero pod Microra ptor

Relative leg length

0.38

0.36 0.34

Micro rap tor

100

Rela tive me ta ta rsal len gth

B asal bir ds

Archaeopteryx

E pidendrosaurus

An ch iorn is

Microra ptor

Thero pod

Relative tib ia len gth 0.38

The rop od

Basal b irds

Archaeo pteryx

110

Epid end rosau rus

A nchio rnis

Microra ptor

Rela tive me ta ta rsal leng th

Taxa less than 1 kg Taxa less than 5 kg

0.34

0.32

0.28

0.3

0.26

0.24

0.22 0.2

100

90

80

70

60

50

40