Table 2 Method for assigning reliability in trait assessments for all traits.

From: Functional traits of the world’s late Quaternary large-bodied avian and mammalian herbivores

Reliability rank

Diet

Mass

Habitat

Fermentation & Limb morphology

0

Expert opinion

Imputed

Inferred from ___: Genus, habitat associations

Expert Opinion

Imputed

Method unknown

Method uncertain

Inferred from ___: relative of suggested similar size

Extant species (method unknown, presume measured)

Expert opinion

Imputed

Inferred from ___: Family, Genus, absence of evidence, co-occurring species

Proxy isotopes ____: (δ13C, δ18O, δ15N)

Proxy ___ morphology: craniodental, appendicular

Inferred from ____: diet, Class, Infraclass, Order

1

Functional ___ morphology: craniodental, appendicular

Observed low sample size (1–5) ___: dental bolus/coprolite

Functional isometric relationship (____): bone size, shoulder height, teeth size etc.

Functional ____ morphology: craniodental, appendicular

Observed low (1–5) sample size ___: dental bolus, coprolite, foraging, fecal analysis, stomach-contents, DNA metabarcoding

Inferred from ____: Suborder, sister Families

2

Proxy ___: isotopes (δ13C, δ18O, δ15N, etc), dental wear (mesowear, microwear)

Proxy allometric relationship (___): bone size, shoulder height, teeth size etc,

Proxy volumetric estimate

Inferred from ___: habitat association, vegetation association

Inferred from ___: Subfamily, Family

3

Observed ___: Fecal analysis, stomach-contents, coprolites, foraging observations, dental bolus, DNA metabarcoding

Observed measured body mass

Observed ___: foraging observations, habitat use

Observed ___: Species, Genus

  1. The italic text substitutes for ‘___’. At times, in cases where sources contradicted each other, or because of low source quality, reliability rank will be lower than reported here, with explanations in respective notes column. Likewise, particularly for diet, if empirical evidence was interpolated from a closely related species, the taxonomic relation is noted in parentheses following the method designation and reliability ranks are reduced.