Table 1. Classification and general features of Methanocorpusculum labreanum Z in accordance with the Minimum Information about a Genome Sequence (MIGS) recommendations [9].

MIGS ID	Property	Term	Evidence Code
	Current classification	Domain Archaea
		Phylum Euryarchaeota
		Class Methanomicrobia
		Order Methanomicrobiales
		Family Methanocorpusculaceae
		Genus Methanocorpusculum	TAS [10]
		Species Methanocorpusculum labreanum	TAS [1]
	Gram stain	negative	TAS [1]
	Cell shape	irregular coccus	TAS [1]
	Motility	nonmotile	TAS [1]
	Sporulation	nonsporulating
	Temperature range	25-40°C	TAS [1]
	Optimum temperature	37°C	TAS [1]
MIGS-6.3	Salinity	0-30 g/L NaCl	TAS [1]
MIGS-22	Oxygen requirement	anaerobe	TAS [1]
	Carbon source	CO2, acetate	TAS [1]
	Energy source	H2/CO2, formate	TAS [1]
MIGS-6	Habitat	sediment	TAS [1]
MIGS-15	Biotic relationship	free-living	TAS [1]
MIGS-14	Pathogenicity	none
	Biosafety level	1
	Isolation	sediment	TAS [1]
MIGS-4	Geographic location	Tar Pit Lake, La Brea Tar Pits	TAS [1]
MIGS-5	Isolation time	1989	TAS [1]
MIGS-4.1 MIGS-4.2	Latitude-longitude	34.107811/-118.599658
MIGS-4.3	Depth	0-5 cm	TAS [1]
MIGS-4.4	Altitude	not applicable

Evidence codes - IDA: Inferred from Direct Assay (first time in publication); TAS: Traceable Author Statement (i.e., a direct report exists in the literature); NAS: Non-traceable Author Statement (i.e., not directly observed for the living, isolated sample, but based on a generally accepted property for the species, or anecdotal evidence). These evidence codes are from the Gene Ontology project [10]. If the evidence code is IDA, then the property should have been directly observed, for the purpose of this specific publication, for a live isolate by one of the authors, or an expert or reputable institution mentioned in the acknowledgements.