Spiroplasma is a bacteria common in insects. In https://lpsn.dsmz.de/phylum/mycoplasmatota, it is classified in phylum Mycoplasmatota. However, in the SILVA database (https://www.arb-silva.de/), it is classified in phylum Bacillota (previously Firmicutes).
Which is correct?
Most sources say Mycoplasmatota. See https://www.ncbi.nlm.nih.gov/datasets/taxonomy/2132/
The genus Spiroplasma is classified within the phylum Mycoplasmatota. This phylum includes bacteria that lack a cell wall, making them distinct from many other bacteria that typically have rigid cell walls.
It has a spiral shape and moves in a corkscrew motion. Many Spiroplasma are found either in the gut or haemolymph of insects where they can act to manipulate host reproduction or defend the host as endosymbionts. Spiroplasma are also disease-causing agents in the phloem of plants. Spiroplasmas are fastidious organisms, which require a rich culture medium. Typically they grow well at 30 °C, but not at 37 °C. A few species, notably Spiroplasma mirum, grow well at 37 °C (human body temperature), and cause cataracts and neurological damage in suckling mice. The best-studied species of spiroplasmas are Spiroplasma poulsonii, a reproductive manipulator and defensive insect symbiont, Spiroplasma citri, the causative agent of the citrus stubborn disease, and Spiroplasma kunkelii, the causative agent of corn stunt disease.
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