Thermoacidophilic xylanase enzymes are mostly preferred for use as animal feed additives. In this study, we performed in silico phylogeny, sequence, structure, and enzyme-docked complex analyses of six thermoacidophilic GH11 xylanases belonging to various fungal species (Gymnopus androsaceus = GaXyl, Penicilliopsis zonata PzXyl, Aspergillus neoniger AnXyl, Calocera viscosa CvXyl, Acidomyces ric...