Table 1 AHPO quantification of melanin markers in extant and fossil frogs

From: Non-integumentary melanosomes can bias reconstructions of the colours of fossil vertebrates

Taxon

Tissue

PTCA (ng/mg)

PDCA (ng/mg)

PTeCA (ng/mg)

PTeCA/PTCA

4-AHP (ng/mg)

X. laevis

Liver

128

8.1

60.7

0.47

2.9

 

Lung

73.7

5.9

29.2

0.40

4.3

 

Spleen

12.8

1.0

17.4

1.36

0.6

P. pueyoi

Torso

258

36.9

486

1.88

–

  1. PTCA and PDCA are markers for eumelanin; 4-AHP is a marker for phaeomelanin and PTeCA is a marker for diagenetically altered eumelanin9
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