Pleurostomatida Based

KEY TO GENERA WITHIN THE ORDER PLEUROSTOMATIDA Based on previous reports (Wu et al., 2017; Pan et al., 2020) and the present work, a revised key to the genera is provided here: 1. Glabrous region in anterior of right side present …............................................................................. 2 Glabrous region in anterior of right side absent …............................................................................... 4 2. Leftmost left kinety (LK n ) terminates at anterior end of cell …........................................................... 3 Leftmost left kinety (LK) does not terminate at anterior end of cell...........................… Pseudolitonotus n 3. Right somatic kineties anteriorly shortened along rightmost full kineties …..................... Apolitonotus Right somatic kineties progressively shortened anteriorly from middle towards dorsal and ventral margins …............................................................................................................................ Paralitonotus 4. Middle right somatic kineties anteriorly shortened to form a suture …............................................. 5 Middle right somatic kineties not shortened to form a suture ….......................................................... 10 5. Middle right somatic kineties shortened posteriorly to form a suture …..................... Kentrophyllum Middle right somatic kineties not shortened posteriorly to form a suture.......................................... 6 6. Spoon-like excavation in anterior region present …........................................................ Amphileptiscus Spoon-like exca vation in anterior region absent…...................................................................................7 7. Left perioral kinety forming a circle …................................................................................... Opisthodon Left perioral kinety not forming a circ le ….................................................................................................8 8. Right and left perioral kineties do not cross and reach posterior of cell ….......................................... 9 Right and left perioral kineties cross and do not reach posterior end of cell …................ Apoamphileptus 9. Oral slit extends nearly to posterior end of cell …....................................................... Pseudoamphileptus Oral slit does not extend nearly to posterior end of cell …..................................................... Amphileptus 10. Right somatic kineties anteriorly shortened along rightmost full kineties ….................... Protolitonotus Right somatic kineties anteriorly shortened along perioral kinety.................................................... 11 11. Extrusomes absent along dorsal margin ….......................................................................................... 12 Extrusomes present along dorsal margin ….......................................................................................... 13 12. Spoon-like excavation present …................................................................................................ Acineria Spoon-like excavation absent …..............................................................................................., Litonotus 13. Without string-like oral bulge ….......................................................................................... Loxophyllum With string-like oral bulge…........................................................................................... Siroloxophyllum
Published as part of Zhang, Gongaote, Zhao, Yan, Chi, Yong, Warren, Alan, Pan, Hongbo & Song, Weibo, 2022, Updating the phylogeny and taxonomy of pleurostomatid ciliates (Protista: Ciliophora) with establishment of a new family, a new genus and two new species, pp. 105-123 in Zoological Journal of the Linnean Society 196 (1) on page 120, DOI: 10.1093/zoolinnean/zlac028, http://zenodo.org/record/7035078
{"references":["Wu L, Jiao X, Shen Z, Yi Z, Li J, Warren A, Lin X. 2017. New taxa refresh the phylogeny and classification of pleurostomatid ciliates (Ciliophora, Litostomatea). Zoologica Scripta 46: 245 - 253.","Pan H, Zhang Q, Dong J, Jiang J. 2020. Morphology and phylogeny of two novel pleurostomatids (Ciliophora, Litostomatea), establishing a new genus. Journal of Eukaryotic Microbiology 67: 252 - 262."]}