Acaroidea

Female fish mite Lardoglyphus konoi, from here.

Belongs within: Astigmata.
Contains: Acaridae.

The Acaroidea are a group of mites commonly associated with nests of vertebrates or Hymenoptera, though members of the family Acaridae have become more diverse in habits. Females of the Acaroidea have a strongly folded pseudovipositor that they use in egg deposition (OConnor 2009).

Characters (from OConnor 2009): Adults with gnathosoma normally formed; chelicerae chelate-dentate. Subcapitulum and palpi normally formed. Idiosoma with cuticle smooth, mammillate, tuberculate, rarely entirely sclerotised. Propodosomatic sclerotisation typically shield-like, rarely in form of two parallel sclerites, occasionally absent. Sejugal furrow usually present, sometimes absent. Dorsal and paraproctal chaetome complete or strongly reduced. Coxisternal skeleton normally developed with addition of paired apodematic elements in ventral sejugal region; chaetome ancestrally complete. Female oviporus in form of inverted V; internally with strongly folded pseudovipositor; epigynal apodeme rarely apparent. Male normally with paranal suckers, occasionally reduced or absent; modified, sucker-like setae on tarsus IV; sometimes with legs III variously enlarged, or rarely legs I enlarged. Mating position reversed. Legs normally developed; chaetome complete to strongly reversed. Pretarsi with or without membranous ambulacrum, empodial claws usually present, rarely absent. Deutonymphs (where known) with gnathosomatic remnant variously developed or absent; idiosoma typically ovoid to rounded in outline, usually well sclerotised, smooth or with pattern of striations or punctations dorsally; propodosomatic ocelli rarely present (some Acaridae); sejugal furrow always present; coxisternal skeleton normally developed or strongly reduced and without posterior median apodeme, chaetome ancestrally complete or some or all coxal setae absent; attachment organ well developed, with all structures present; legs normally developed, or legs IV reduced and lacking pretarsus, chaetome complete or some setae absent; pretarsi with or without membranous ambulacrum; empodial claws normally present, occasionally absent (some Suidasiidae).

<==Acaroidea
    |  i. s.: Scatoglyphus O01 [Scatoglyphidae O09]
    |           `--S. polytrematus O09
    |         Chetochelacaridae O09
    |           |--Diplopodocoptes transkeiensis O09
    |           `--Chetochelacarus mamillatus O09
    |--Lardoglyphus [Lardoglyphidae] O01
    |    |--L. falconidus O09
    |    |--L. konoi (Sasa & Asanuma 1951) OM91
    |    `--L. zacheri QA91
    |--+--Acaridae O01
    |  `--Glycacarus [Glycacaridae] O01
    |       `--G. combinatus O01
    |--Gaudiellidae [Partamonacoptidae, Platyglyphidae] O01
    |    |--Platyglyphus malayanus O09
    |    |--Cerophagus nearcticus O09
    |    |--Partamonacoptes O09
    |    `--Gaudiella [incl. Trigonacoptes] O09
    |         `--G. minuta O09
    `--Suidasiidae [Sapracaridae] O01
         |--Tortonia quadridens O09
         |--Sapracarus tuberculatus O09
         |--Namibacarus O01
         |--Neosuidasia O09
         |--Sinosuidasia O09
         `--Suidasia O01
              |--S. nesbitti O09
              `--S. pontifica [incl. S. medanensis] O09

*Type species of generic name indicated

REFERENCES

[O01] OConnor, B. M. 2001. Historical ecology of the Acaridae (Acari): Phylogenetic evidence for host and habitat shifts. In Acarology: Proceedings of the 10^th International Congress (R. B. Halliday, D. E. Walter, H. C. Proctor, R. A. Norton & M. J. Colloff, eds) pp. 76-82. CSIRO Publishing: Melbourne.

[O09] OConnor, B. M. 2009. Cohort Astigmatina. In: Krantz, G. W. & D. E. Walter (eds) A Manual of Acarology, 3^rd ed., pp. 565-657. Texas Tech University Press.

[OM91] Okamoto, M., & K. Matsumoto. 1991. Observations on the behavior of the hypopus of Lardoglyphus konoi. In: Dusbábek, F. & V. Bukva (eds) Modern Acarology: Proceedings of the VIII International Congress of Acarology, held in České Budĕjovice, Czechoslovakia, 6–11 August 1990 vol. 2 pp. 555-559. SPB Academic Publishing: The Hague.

[QA91] Quintero, M. T., & H. A. Acevedo. 1991. Studies on deep litter mites on farms in Mexico. In: Dusbábek, F. & V. Bukva (eds) Modern Acarology: Proceedings of the VIII International Congress of Acarology, held in České Budĕjovice, Czechoslovakia, 6–11 August 1990 vol. 1 pp. 443-448. SPB Academic Publishing: The Hague.