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Ciliates of the family Balantidiidae widely parasitize the digestive systems of various invertebrates and vertebrates. Among them, Balantioides coli with cosmopolitan distribution is a major zoonotic pathogen. For a long time, due to the similar morphology of trophozoites of Balantidiidae ciliates from various hosts and the influences of various growing stages and host intestinal microenvironments on morphological characteristics, there have been some inconsistencies and confusions in their classification and nomenclature in literature. Recently, significant progress has been achieved in the study of the phylogenetic relationship and genetic diversity of Balantidiidae ciliates, providing new evidences for their taxonomic reconstruction. On the basis of a systematic review of literature and our findings, this article summarizes the taxonomic status and genetic diversity of Balantidiidae ciliates from different hosts in terms of the morphological characteristics, encystation ability, host specificity, and phylogenetic relationships. The existing evidence supports the division of the family Balantidiidae into two genera Balantidium and Balantioides and indicates that the ciliate infecting humans and various mammals should be classified as Balantioides coli. The related findings and understanding help clarify the taxonomy and nomenclature system of Balantidiidae ciliates and provide an important reference for studying the biological characteristics of Balantidiidae ciliates as well as the diagnosis and control of balantiosis in humans and animals.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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