Table 1.
Classification and general features according to the MIGS recommendations [74]
| MIGS ID | Property | Term | Evidence codea |
|---|---|---|---|
| Classification | Domain Archaea | TAS[75] | |
| Phylum Crenarchaeota | TAS[76] | ||
| Class Thermoprotei | TAS[77] | ||
| Order Desulfurococcales | TAS[78] | ||
| Family Pyrodictiaceae | TAS[79] | ||
| Genus Pyrodictium | TAS[80] | ||
| Species Pyrodictium delayeni | TAS[3] | ||
| Strain: Hulk | IDA | ||
| Gram stain | Not applicable | NAS | |
| Cell shape | Coccus | IDA | |
| Motility | Lophotrichous | IDA | |
| Sporulation | Not applicable | NAS | |
| Temperature range | 70–105 °C | IDA | |
| Optimum temperature | 90 °C | IDA | |
| pH range; Optimum | 3.3–7.7; 6.7 | IDA | |
| Carbon source | CO2, formate, peptone, starch and cellobiose | IDA | |
| MIGS-6 | Habitat | Marine hydrothermal systems | IDA |
| MIGS-6.3 | Salinity | 2.0% NaCl (w/v) | IDA |
| MIGS-22 | Oxygen requirement | Anaerobic | IDA |
| MIGS-15 | Biotic relationship | Free-living | IDA |
| MIGS-14 | Pathogenicity | Non-pathogen | IDA |
| MIGS-4 | Geographic location | Hulk hydrothermal vent, located on Main Endeavour segment of the Juan de Fuca Ridge, in the Northeast Pacific Ocean approximately 300 miles West of Seattle, Washington, at the depth of 2200 m | IDA |
| MIGS-5 | Sample collection | August 1999 | IDA |
| MIGS-4.1 | Latitude | 47.9501 | IDA |
| MIGS-4.2 | Longitude | −129.0970 | IDA |
| MIGS-4.4 | Altitude | Not applicable | NAS |
a Evidence codes – IDA: Inferred from Direct Assay; 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 [81]