Table 1. Strain sample collection metadata.

The table shows each strain, the proposed species characterization, the source from which the strain was isolated (all various developmental stages of A. bomboides) and the date on which the sample was collected. All strains were isolated from different brood cells. Superscript T indicates type strains of each proposed species.

Strain	Proposed species	Source	Collection date
BH034T	S. anthophorae sp. nov.	Early pollen provision	4 June 2021
BH055	S. anthophorae sp. nov.	Egg stage pollen provision	9 June 2021
BH097	S. anthophorae sp. nov.	Overwintering prepupa	25 October 2022
BH104	S. anthophorae sp. nov.	Overwintering prepupa	25 October 2022
BH105	S. anthophorae sp. nov.	Pupa	12 May 2023
BH106T	Streptomyces nidicola sp. nov.	Pupa	12 May 2023