Table 1.
Summary of changes to data matrix for phylogenetic analysis
| 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 |
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)