What i understood is is,
Lactobacillus sporogenes is a heat stable, gastric acid resistant strain of probiotic bacteria. It was the original name of the Bacillus Coagulans probiotic strain. and its no more belongs to probiotic family.
You are correct. When taxonomists decided that the genus Lactobacillus could not include spore-formers, the culture was reclassified and renamed. Renaming happens a lot amongst the bacteria. We use a probiotic that was originally named Lactobacillus acidophilus but is now classified as L. helveticus. Genetic techniques have contributed a lot in this regard.
Bacillus coagulans is a lactic acid-forming bacterial species. The organism was first isolated and described as Bacillus coagulans in 1915 by B.W. Hammer at the Iowa Agricultural Experiment Station as a cause of an outbreak of coagulation in evaporated milk packed by an Iowa condensary.. Separately isolated in 1935 and described as Lactobacillus sporogenes in the fifth edition of Bergey's Manual
the seventh edition of Bergey's, it was finally transferred to the genus Bacillus. DNA-based technology was used in distinguishing between the two genera of bacteria which are morphologically similar and possess similar physiological and biochemical characteristics
Both are same. Bacillus coagulans was previously known as Lactobacillus sporogenes.
https://www.sabinsa.com/newsroom/articles/bacillus-coagulans-probiotic-of-choice-nutracos-march-april-2012.pdf
It is still a probiotic but has been reclassified as belonging to the genus Bacillus, because Lactobacillus species are now not allowed to have spores.
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