Atropacarus (Atropacarus) Ewing, 1917

Niedbała, Wojciech & Liu, Dong, 2023, Systematic, synonymic and biogeographical list of ptyctimous mites (Acari, Oribatida) in the world (1799 – 2022), Zootaxa 5265 (1), pp. 1-442 : 14

Atropacarus (Atropacarus) Ewing, 1917

type species. Hoplophora stricula C.L. Koch, 1836

Hoploderma Michael, 1898 (in part): Niedbała 1986a

Steganacarus auct. (in part): Niedbała 1986a

Steganacarus (Atropacarus) : Niedbała, 1983a, Niedbała 1986a

Helvetacarus Mahunka, 1993 syn. by Subías 2004

type species. Helvetacarus genavensis Mahunka, 1993

Semicosmopolitan

Notes. In this catalogue we do not use the names Ptyctima Poppe & Oudemans (1906) and Arthroptyctima Grandjean, 1967. On the other hand, we consider the name Euptyctima Grandjean, 1967 justifiable as it includes the monophyletic group of ptyctimous mites Euphthiracaroidea and Phthiracaroidea .

To stick to the formal side,then,according to Poppe and Oudemans(1906),Ptyctima includes only Phthiracaroidea . It is uncertain whether they included a representative of the Mesoplophoridae — Mesoplophora michaeliana Berlese, 1904 , which was already known at that time. Therefore, we propose Ptyctima as a taxon incertae sedis.

The name Arthroptyctima Grandjean, 1967 cannot be retained, would only be an empty name of the paraphyletic taxon ptyctimous including ptychoidal Protoplophoridae and Mesoplophoridae . Both families are members of the two superfamilies Protoplophoroidea and Hypochthonoidea which also include the nonptychoidal taxa. A more detailed discussion on this topic can be found in Norton & Sidorchuk (2014).