Table 2.

Closest sister taxa to observed Nostoc-like organisms observed from mosses in this study, based on our de novo 16S tree of Nostocaceae (Fig. 9)

Nostoc-like organism sequence ID (Moss host)	Nearest neighbor sequence ID and description	Blastn alignment scores (identities, gaps)
PX869778 (Hylocomium)	JN847344 Leptogium-associated Nostoc sp. (macrolichen symbiont)	1395/1405 (99%), 8 (1%)
PX856665 (Homalia)	KM019941 Nostoc pruniforme SAG 62.79 (freshwater, free-living)	1353/1383 (98%), 6 (0%)
PX856664 (Pseudoamblystegium)	AB275347 Unidentified cyanobacterium Ni1-C1 (unidentified-macrolichen symbiont), classified as likely Nostoc by Cyanoseq	677/710 (95%), 11 (2%)
PX856666 (Zygodon)	MH598843 Compactonostoc shennongjiaensis (Free-living on rocks)	1150/1168 (98%), 8 (1%)
	KU219709 “Nostoc” sp., unpublished, classified as likely Compactonostoc by Cyanoseq	904/915 (99%), 6 (1%)

When a close match is available, only one taxa is listed. When a close match is not obvious, the two nearest neighbor taxa are listed