Cheyletiini

Neoeucheyla sp., from here.

Belongs within: Cheyletidae.

The Cheyletiini are a group of free-living predatory mites bearing fan-shaped setae on the palpi, legs and often body. The genera Cheyletia, Samsinakia and Hypopicheyla are found in association with insects. Chiapacheylus, Dubininiola and Oudemansicheyla form a group characterised by numerous neotrichial setae on that idiosoma that are similar in shape to other idiosomal setae (Bochkov & Fain 2001).

Characters (from Bochkov & Fain 2001): Female with gnathosoma well developed, about 30%, or more, length of idiosoma, without protrusions. Gnathosomal apex with short median protuberances. Palpal tarsi with two dorsal comb-like setae and two well developed sickle-like ventrai setae (in Neoeucheyla group the inner ventral setae are cloud-like). Palpal claws slightly curved medially, with teeth, not thickened. Dorsal and ventral setae of palpal tibia fan-like. Palpal femur and palpal genu not fused, without protrusions, bearing altogether three to five setae (most of these setae fan-like). Idiosoma oval. Eyes present (strongly reduced in Hoffmannita). Shoulder-like projections of idiosoma absent. All idiosomal setae not exceeding half of idiosomal length. Neotrichial setae present. Length of all legs not exceeding idiosomal length. Legs IV normally developed. Tarsi slender without knobs covering pretarsus. Guard seta of tarsus I fan-like, solenidion ω1 situated in basal half of tarsus I. Tibia I with solenidion. Tibia II without solenidion. Genu I with rod-like solenidion. Seta vI of tarsus I situated at same level as solenidion ω1 and guard seta. Pretarsus and claws present on all legs. Apical seta of tarsus I normally long. Tarsal setae p' and p" II-IV hairlike. Coxae III with two setae. Trochanters I-IV with one seta. Distance between coxae II and III less than half of idiosomal width. Male with palpal tarsus with two comb-like and two sickle-like setae.

<==Cheyletiini
    |  i. s.: Myrmicocheyla BF01
    |         Columbicheyla BF01
    |         Granulocheyletus Fain & Bochkov 2002 FB02
    |           |--*G. corpuzrarosae Fain & Bochkov 2002 FB02
    |           `--G. kureatollensis (Goff 1982) [=Hemicheyletia kureatollensis] FB02
    |--Samsinakia Volgin 1965 BF01
    |    `--S. volgini (Fain 1972) [=Cryptocheyla volgini] H98
    `--+--Grallacheles De Leon 1962 BF01
       |    `--G. bakeri De Leon 1962 C-RSV-S88
       |--+--Hypopicheyla Volgin 1969 BF01
       |  `--Hoffmannita Pelaez 1962 BF01
       |       `--H. mexicana H07
       |--+--Chiapacheylus De Leon 1962 BF01
       |  |    `--C. macrocorneus NK94
       |  |--Dubininiola Volgin 1969 BF01
       |  `--Oudemansicheyla Volgin 1969 BF01
       |       |--O. coprosomae Thewke & Enns 1976 H98
       |       `--O. denmarki (Yunker 1961) [=Cheletomimus denmarki] H98
       `--+--Microcheyla Volgin 1966 BF01
          |--Cheyletia Haller 1884 BF01
          |    |--C. squamosa (Degeer 1778) (see below for synonymy) B49
          |    |--C. pyriformis (Banks 1904) [=Cheyletus pyriformis; incl. Cheyletus longipalpus Ewing 1909] B49
          |    `--C. tropica Shiba 1976 S76
          `--+--Bothrocheyla Volgin 1964 BF01
             |--Cunliffella Volgin 1969 BF01
             `--Neoeucheyla Radford 1950 BF01
                  |--N. bulgarica BF01
                  |--N. macrocornens E-KO07
                  `--N. tuberculicoxa BF01

Cheyletia squamosa (Degeer 1778) [=Acarus squamosus, Cheletia squamosa, Cheyletus squamosa; incl. *Cheyletia laureata Haller 1884] B49

*Type species of generic name indicated

REFERENCES

[B49] Baker, E. W. 1949. A review of the mites of the family Cheyletidae in the United States National Museum. Proceedings of the United States National Museum 99 (3238): 267–320.

[BF01] Bochkov, A. V., & A. Fain. 2001. Phylogeny and system of the Cheyletidae (Acari: Prostigmata) with special reference to their host-parasite associations. Bulletin de l’Institut Royal des Sciences Naturelles de Belgique Entomologie 71: 5–36.

[C-RSV-S88] Corpuz-Raros, L. A., G. C. Sabio & M. Velasco-Soriano. 1988. Mites associated with stored products, poultry houses and house dust in the Philippines. Philippine Entomologist 7 (3): 311–321.

[E-KO07] El-Kammah, K. M., & L. M. I. Oyoun. 2007. Taxonomic records of mite species associated with animal and poultry farms in the Nile delta, vally and N. Sinai Egypt. In: Morales-Malacara, J. B., V. M. Behan-Pelletier, E. Ueckermann, T. M. Pérez, E. G. Estrada-Venegas & M. Badii (eds) Acarology XI: Proceedings of the International Congress pp. 223–232. Instituto de Biología and Faculdad de Ciencias, Universidad Nacional Autónoma de México, Sociedad Latinoamericana de Acarología: México.

[FB02] Fain, A., & A. V. Bochkov. 2002. A new genus and species of cheyletid mite (Acari: Cheyletidae) from a cave in Western Australia. International Journal of Acarology 28 (1): 37–40.

[H98] Halliday, R. B. 1998. Mites of Australia: A checklist and bibliography. CSIRO Publishing: Collingwood.

[H07] Hoffmann, A. 2007. Acarology in Mexico: prehispanic to modern times. In: Morales-Malacara, J. B., V. M. Behan-Pelletier, E. Ueckermann, T. M. Pérez, E. G. Estrada-Venegas & M. Badii (eds) Acarology XI: Proceedings of the International Congress pp. 21–26. Instituto de Biología and Faculdad de Ciencias, Universidad Nacional Autónoma de México, Sociedad Latinoamericana de Acarología: México.

[NK94] Norton, R. A., & J. B. Kethley. 1994. Ecdysial cleavage lines of acariform mites (Arachnida, Acari). Zoologica Scripta 23 (3): 175–191.

[S76] Shiba, M. 1976. Taxonomic investigation on free-living Prostigmata from the Malay Peninsula. Nature and Life in Southeast Asia 7: 83–229.

Last updated: 19 June 2022.