Belongs within: Holonota.
The Cymbaeremaeidae are a small but morphologically diverse family of oribatid mites. The genera Ametroproctus and Scapuleremaeus have been treated as a separate family Ametroproctidae due to their possession of well-developed prodorsal lamellae (absent in other cymbaeremaeid genera), but Behan-Pelletier (1988) united the two families on the basis of their similarly apheredermous, plicate nymphs with a characteristic arrangement of porose areas on the body. Scapuleremaeus kobauensis also possesses long, triangular humeral processes (Balogh & Balogh 1992).
The legs of Cymbaeremaeidae are usually tridactyle, but the Fijian Seteremaeus spinosus has monodactylous legs. In Cymbaeremaeus, the notogaster is divided into distinct marginal and central areas though both share the same ornamentation of rough, irregular wrinkles (Balogh & Balogh 1992).
Characters (Behan-Pelletier 1988, excluding Scapheremaeus): Immatures with plicate integument. Apheredermous nymphs with unideficient setation. Paraproctal atrichosy in larva, protonymph and deutonymph. Seta d present on genua and tibiae of immatures, usually absent from adult (present in some Ametroproctus). Immatures with prodorsal and opisthosomal porose areas or sacculi. Tarsi of immatures with subunguinal bilobed pulvillus. Adult prodorsum with pedotecta I and II, without genal incision, without lamellae. Palpal eupathidium acm not attached to solenidion, inserted on large tubercle. Mentum with tectum. Notogaster with or without lenticulus and humeral projection; without tectal border posteriorly. Pteromorphs absent. Porose areas of octotaxic system absent. Ten or thirteen pairs of notogastral setae, c1 and c3 absent, d series present or absent. All leg femora, tibiae and tarsi generally with sacculi in adult (porose areas present in one species of Ametroproctus). Seta s on tarsus I non-eupathidial.
<==Cymbaeremaeidae [Ametroproctidae, Cymbaeremaeinae, Cymbaeremaeoidea]
|--Jureremus foveolatus Krivolutsky & Ryabinin 1976S93
|--Seteremaeus Hammer 1971S04
| `--*S. spinosus Hammer 1971S04
|--Scapuleremaeus Behan-Pelletier 1989S04
| `--*S. kobauensis Behan-Pelletier 1989S04
|--Bulleremaeus Hammer 1966S04
| |--*B. reticulatus Hammer 1966S04
| `--B. tuberculatus Hammer 1966S04
|--Cymbaeremaeus Berlese 1896S04
| |--*C. cymba (Nicolet 1855)S04 (see below for synonymy)
| |--C. foliatus (Balogh & Csiszár 1963) [=Scutovertex foliatus]S04
| `--C. silva Fujikawa 2002S04
`--Ametroproctus Higgins & Woolley 1968B-P87
| i. s.: A. valeiaeSC19
|--A. (Ametroproctus)B-P87
| |--*A. (A.) oresbios Higgins & Woolley 1968B-P87
| |--A. (A.) aridus Behan-Pelletier 1987B-P87
| `--A. (A.) tuberculosus Behan-Pelletier 1987B-P87
`--A. (Coropoculia Aoki & Fujikawa 1972)B-P87
|--A. (*C.) reticulatus (Aoki & Fujikawa 1972) [=*Coropoculia reticulata]B-P87
|--A. (C.) beringianus Behan-Pelletier 1987B-P87
|--A. (C.) canningsi Behan-Pelletier 1987B-P87
`--A. (C.) lamellatus (Schweizer 1956) [=Cymbaeremaeus lamellatus]B-P87
*Cymbaeremaeus cymba (Nicolet 1855)S04 [=Eremaeus cymbaS04, Cymbaerimaeus (l. c.) cymbaL87; incl. Cymbaeremaeus pulvillifer Willmann 1931S04]
*Type species of generic name indicated
References
Balogh, J., & P. Balogh. 1992. The Oribatid Mites Genera of the World vol. 1. Hungarian Natural History Museum: Budapest.
[B-P87] Behan-Pelletier, V. M. 1987. Redefinition of Ametroproctus (Acari: Oribatida) with descriptions of new species. Canadian Entomologist 119 (6): 505–536.
Behan-Pelletier, V. M. 1988. Systematic relationships of Ametroproctus, with modified definition of Cymbaeremaeidae (Acari: Oribatida). In: Channabasavanna, G. P., & C. A. Viraktamath (eds) Progress in Acarology vol. 1 pp. 301–308. E. J. Brill: Leiden.
[L87] Luxton, M. 1987. The British oribatid mites (Acari: Cryptostigmata) of Warburton and Pearce. Journal of Natural History 21: 1359–1365.
[SC19] Schaefer, I., & T. Caruso. 2019. Oribatid mites show that soil food web complexity and close aboveground-belowground linkages emerged in the early Paleozoic. Communications Biology 2: 387.
[S93] Selden, P. A. 1993. Arthropoda (Aglaspidida, Pycnogonida and Chelicerata). In: Benton, M. J. (ed.) The Fossil Record 2 pp. 297–320. Chapman & Hall: London.
[S04] Subías, L. S. 2004. Listado sistemático, sinonímico y biogeográfico de los ácaros oribátidos (Acariformes, Oribatida) del mundo (1758–2002). Graellsia 60 (número extraordinario): 3–305.