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Table 1 Summary of changes to data matrix for phylogenetic analysis

From: The impact of taphonomic data on phylogenetic resolution: Helenodora inopinata (Carboniferous, Mazon Creek Lagerstätte) and the onychophoran stem lineage

New anatomical interpretations

 #36

(?) - > (1)

Annulations

 #38

(?) - > (0)

Annulations

 #67

(?) - > (0)

Limbs

 #75

(?) - > (1)

Posterior

Ambiguity due to lack of preservation

 #24

(1) - > (?)

Mouth position

 #52

(0) - > (?)

Midgut glands

 #62

(1) - > (?)

Dermal papillae

Genuine absence of decay resistant characters

 #12

(?) - > (0) ; nc

Jaws

 #13

(?) - > (-) ; nc

Jaws

 #14

(?) - > (0) ; nc

Jaws

 #15

(1) - > (0) ; (1) - > (?)

Slime papillae

 #46

(?) - > (-) ; nc

Claws

 #64

(1) - > (0) ; (1) - > (?)

Claws

 #65

(0) - > (–) ; (0) - > (?)

Claws

 #66

(1) - > (–) ; (1) - > (?)

Claws

 #80

(?) - > (-) ; nc

Claws

  1. Three different types of modifications to the character coding for Helenodora inopinata (=Ilyodes), based on data presented by Yang et al. [4] with their character numbers used. Modifications refer to both coding methodologies unless two changes are shown separated by a semi-colon, in which case the first refers to the decay-informed coding, the second to conservative coding, nc = no change to matrix. The aspect of the anatomy of H. inopinata in question is reported for reference. Complete data matrix presented in Additional file 8 (character key in Additional file 6)