After Chernova & Stein, 2002

<==o Psednos Barnard, 1927
   |?- P. andriashevi
   |?- P. balushkini
   |?- P. barnardi
   |?- P. gelatinosus
   |?- P. groenlandicus
   |?- P. harteli
   |?- P. microps
   |?- P. nataliae
   |?- P. whitleyi
   |--o P. christinae -group
   |  |-- P. christinae Andriashev, 1992
   |  `-- P. dentatus Chernova & Stein, 2002
   `--o P. micrurus -group
      |-- P. anoderkes Chernova & Stein, 2002
      |-- P. cathetostomus Chernova & Stein, 2002
      |-- P. delawarei Chernova & Stein, 2002
      |-- P. griseus Chernova & Stein, 2002
      |-- P. mexicanus Chernova & Stein, 2002
      |-- P. micruroides
      |-- P. micrurus Barnard, 1927 [geno-type]
      |-- P. mirabilis
      |-- P. islandicus Chernova & Stein, 2002
      |-- P. melanocephalus Chernova & Stein, 2002
      |-- P. sargassicus Chernova & Stein, 2002
      |-- P. spirohira Chernova & Stein, 2002
      |-- P. steini
      |-- P. pallidus Chernova & Stein, 2002
      |-- P. sp. 1
      |-- P. sp. 2
      `-- P. sp. 3

Reference(s):