Candidatus Rhabdochlamydia porcellionis

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Formal styling
Candidatus Rhabdochlamydia porcellionis” Kostanjsek et al., 2004
Effective publication
Kostanjsek et al., 2004
SeqCode status
Automated discovery
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Candidatus Rhabdochlamydia porcellionis' comprises intracellular bacteria within membrane-bound vacuoles in the cytoplasm of hepatopancreatic cells of the terrestrial isopod Porcellio scaber. Cells are non-motile, non-cultivable on cell-free media and have the Gram-negative microscopic appearance of a cell wall without a discernible peptidoglycan layer. Morphology of ‘Candidatus Rhabdochlamydia porcellionis' corresponds to the description of ‘Chlamydia isopodii’ (Shay et al., 1985) and a ‘Rickettsiella-like organism’ (Drobne et al., 1999). Bacteria exhibit a chlamydia-like developmental cycle, in which the cells appear in three morphological forms (reticulate, intermediate and mature elementary bodies) that are packed in membrane-bound vacuoles in the cytoplasm of the host cell. Reticulate bodies with coccoid morphology can be small (up to 1 μm in diameter), which multiply by binary fission, or larger (1–4 μm in diameter), with granular inclusions in the cytoplasm. Morphology of intermediate bodies is coccoid (350–650 nm in diameter), with an electron-dense area in the centre of the cell. Mature elementary bodies have a five-layered cell wall, variable rod-shaped morphology (250–700 nm in length and 100–150 nm in diameter) and oblong structures in the cytoplasm. On the basis of its 16S rRNA gene sequence, ‘Candidatus Rhabdochlamydia porcellionis' forms a distinctive lineage within the order Chlamydiales, close to the family Simkaniaceae, with an oligonucleotide that is complementary to a unique region of the 16S rRNA gene (5′-GAAATGCAAAGGACAGCATC-3′). Assignment to ‘Candidatus Rhabdochlamydia porcellionis' is based on the sequence of the 16S rRNA gene (GenBank accession no. AY223862) and the distinctive morphology of the elementary bodies.
Bacteria » Chlamydiota » Chlamydiia » Parachlamydiales » “Rhabdochlamydiaceae” » “Rhabdochlamydia” » Candidatus Rhabdochlamydia porcellionis
“Rhabdochlamydia” gtdb assigned in Kostanjsek et al., 2004


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Citation Title
Kostanjsek et al., 2004, International Journal of Systematic and Evolutionary Microbiology ‘Candidatus Rhabdochlamydia porcellionis’, an intracellular bacterium from the hepatopancreas of the terrestrial isopod Porcellio scaber (Crustacea: Isopoda)
Effective publication
Assigned this taxon
Drobne et al., 1999, Journal of Invertebrate Pathology Morphological Description of Bacterial Infection of Digestive Glands in the Terrestrial IsopodPorcellio scaber(Isopoda, Crustacea)
Shay et al., 1985, Pathobiology Chlamydia isopodii sp. n., an Obligate Intracellular Parasite of Porcellio scaber

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