The authority of the taxon name (Huber and Stetter) deliberately differs from the authors of the publication (Huber et al.).
According to Ludwig et al. (2021), this "species affiliates with Pyrococcus and may be reclassified".Publication:
Ludwig W, Viver T, Westram R, Francisco Gago J, Bustos-Caparros E, Knittel K, Amann R, Rossello-Mora R. Release LTP_12_2020, featuring a new ARB alignment and improved 16S rRNA tree for prokaryotic type strains. Syst Appl Microbiol 2021; 44:126218.
Complete authorship reads: Huber and Stetter 1996 in Huber, Stöhr, Hohenhaus, Rachel, Burggraf, Jannasch and Stetter 1995.