Table 1. Effect sizes and significance of traits pre- and post-cladistic analysis.

	All clades	Zoonotic clades	Non-zoonotic clades
Vector	1.4*	0.62	−0.16**
Envelope	0.87	1.2*	−0.36**
Cytoplasmic replication	1.8**	0.88	−0.38***

Notes:

The associations between zoonotic history and traits such as enveloped, vector-borne, and cytoplasmic replication are sensitive to the inclusion/exclusion of non-zoonotic clades due to the traits’ cladistic signal. Here, effect sizes (difference in linear predictors) are presented for the all viruses in the original trait-based analysis, the zoonotic clades (removal of non-zoonotic clades found in Fig. 2), and non-zoonotic clades. The direction of the effect of all three traits is conserved, but the magnitude and relative significance changes, as these traits are strongly associated with non-zoonotic clades.

Asterisks indicate significance levels *P < 0.05, **P < 0.01, ***P < 0.001 from Chi-squared tests of the deviance from generalized additive models.