DESCRIPTIONOF LAPIDILACTOBACILLUS GEN. NOV.

Lapidilactobacillus [La.pi.di.lac.to.ba.cil’lus L. masc. n. lapis, stone, referring to the isolation source of the type species Lapidilactobacillus concavus; N.L. masc. n. Lactobacillus a bacterial genus; N.L. masc. n. Lapidilactobacillus, a lactobacillus isolated from stone (walls)].

Thecells are Gram-positive rods or cocci, homofermentative, non motile, non-spore-forming, facultatively anaerobes, and catalase-negative. Pentose utilization and the pH range for growth are strain dependent, the optimum pH is between 6.0 and 7.0. They are homofermentative and mainly produce L-lactic acid. The optimum temperature for growth is 30–37 °C. No ammonia is produced from arginine. The mol% G+C content of DNA is between 38.1 and 49.0.

Aphylogenetic tree on the basis of 16S rRNA genes of all speciesin the genus Lapidiactobacillus is providedin Fig. S6D.

The type species is Lapidilactobacillus concavus comb. nov.; Lapidilactobacillus was previously referred to as L. concavus / dextrinicus group.