Unionicolidae

Likely Unionicola, copyright Stephen Luk.


Belongs within: Neohydrachnidia.
Contains: Neumania, Koenikea, Recifella.

The Unionicolidae are a diverse family of freshwater mites. Larvae, where known, are parasites of aquatic insects (Chironomidae or Trichoptera); adults are more diverse in habits, including predators of crustaceans, commensals or parasites of sponges, and associates of molluscs (Walter et al. 2009).

Characters (from Walter et al. 2009): Adults with dorsal and ventral shields or more soft-bodied; if with ventral shields, then openings for insertions of legs IV with large associated projections extending laterally or posteriorly; chelicerae fused or separate medially; claws simple or with clawlets; legs I often with numerous long thickened setae; glandularia absent on coxal plates IV. Larvae with cheliceral bases fused; dorsal and coxal plates reticulate; coxal plates I separate from posterior coxal group on each side; one pair of urstigmata borne distally between coxal plates I and II; coxal plates III bearing pointed projections posteriorly; legs with five movable segments; tibia I bearing nine setae (and two solenidia), including Ti10 and Ti11; tarsi I-III bearing ten setae and one solenidia; leg tarsi bearing paired claws.

<==Unionicolidae
    |  i. s.: Vietsatax WP99
    |         Unionicolopsis WP99
    |--Pionatacinae S86
    |    |--Neumania S86
    |    |--Koenikea S86
    |    |--Recifella RFF05
    |    |--Schadeella Lundblad 1938 RFF05
    |    |    `--S. crassipalpis Lundblad 1938 RFF05
    |    |--Neumanikea Orghidan & Gruia 1980 S86
    |    |    |--N. coenotica Orghidan & Gruia 1980 S86
    |    |    `--N. guantanamense Orghidan & Gruia 1980 S86
    |    `--Amazonella Lundblad 1930 RFF05
    |         |--A. crassipalpis Lundblad 1941 RFF05
    |         |--A. polypora Lundblad 1936 RFF05
    |         |    |--A. p. polypora RFF05
    |         |    `--A. p. curvimarginata Viets 1959 RFF05
    |         `--A. ribagai Lundblad 1930 RFF05
    |--Pollicipalpus [Pollicipalpinae] WL09
    |    |--P. australicus WL09
    |    `--P. scutatus WL09
    |--Encentridophorus PW01 [Encentridophorinae WL09]
    |    |--E. sarasini PW01
    |    `--E. similis WP99
    |--Omanohydracarus [Omanohydracarinae] WL09
    |    `--O. arabicus WL09
    `--Unionicola Haldeman 1842 [Unionicolinae] RFF05
         |  i. s.: U. aculeata (Koenike 1890) BBM91
         |         U. crassipes (Müller 1776) PH91
         |           |--U. c. crassipes C91
         |           `--U. c. miyazakii Imamura 1953 C91
         |         U. formosa WP99
         |         U. gracilipalpis BK91
         |         U. intermedia WP99
         |         U. lasallei WP99
         |         U. laurentiana Crowell & Davids 1979 [incl. U. nearctica Crowell & Davids 1979] C91
         |         U. minor Soar 1900 [=U. crassipes minor] C91
         |         U. neoaffinis WL09
         |         U. parvipora BK91
         |         U. poundsi WP99
         |         U. ypsilophora (Bonz 1783) BBM91
         |--U. (Unionicola) RFF05
         |    |--U. (U.) iheringi (Koenike 1890) RFF05
         |    |--U. (U.) inermis Lundblad 1941 RFF05
         |    |--U. (U.) levipalpis Besseling 1949 RFF05
         |    |--U. (U.) motasi Viets 1959 RFF05
         |    |--U. (U.) perpusilla Viets 1954 RFF05
         |    |--U. (U.) pugionipalpis Viets 1954 RFF05
         |    |--U. (U.) pusuligera Viets 1954 RFF05
         |    `--U. (U.) siolii Viets 1954 RFF05
         |--U. (Ampullariatax Vidrine 1985) RFF05
         |    `--U. (A.) ampullariae (Koenike 1890) RFF05
         |--U. (Atacella Lundblad 1937) RFF05
         |    |--U. (A.) clathrata (Lundblad 1937) RFF05
         |    |--U. (A.) entrerrianensis (Rosso de Ferradás 1976) RFF05
         |    |--U. (A.) fissipes (Koenike 1891) RFF05
         |    |--U. (A.) gigantea (Cachés & Mañé-Garzón 1973) RFF05
         |    |--U. (A.) perforata (Koenike 1890) RFF05
         |    |--U. (A.) rugosa (Koenike 1890) RFF05
         |    |--U. (A.) schubarti (Viets 1954) RFF05
         |    `--U. (A.) subrecta (Cachés & Mañé-Garzón 1973) RFF05
         |--U. (Australatax Vidrine 1985) RFF05
         |    `--U. (A.) sinuata Lundblad 1938 RFF05
         |--U. (Crameratax Vidrine 1988) RFF05
         |    |--U. (C.) acutidens (Lundblad 1936) RFF05
         |    |--U. (C.) gracilipes (Lundblad 1936) RFF05
         |    `--U. (C.) tumidipalpis (Lundblad 1936) RFF05
         |--U. (Curryatax Vidrine 1992) RFF05
         |    `--U. (C.) prehendens Viets 1954 RFF05
         |--U. (Ferradasatax Vidrine 1988) RFF05
         |    `--U. (F.) procurvipes (Koenike 1890) RFF05
         |--U. (Gledhillatax Vidrine 1992) RFF05
         |    |--U. (G.) angustipalpis (Lundblad 1937) RFF05
         |    |--U. (G.) brevisuturata Viets 1959 RFF05
         |    |--U. (G.) longipes Lundblad 1942 RFF05
         |    `--U. (G.) simplicipes (Lundblad 1936) RFF05
         |--U. (Lasalleatax Vidrine 1992) RFF05
         |    |--U. (L.) brasiliensis (Lundblad 1936) RFF05
         |    |--U. (L.) conjuncta Viets 1954 RFF05
         |    `--U. (L.) unidens Lundblad 1942 RFF05
         |--U. (Lundbladatax Vidrine 1988) RFF05
         |    `--U. (L.) fissipalpis Lundblad 1942 RFF05
         |--U. (Mitchellatax Vidrine 1992) RFF05
         |    |--U. (M.) curvitarsis Lundblad 1941 RFF05
         |    `--U. (M.) longidens Lundblad 1942 RFF05
         |--U. (Polyatacides Lundblad 1941) RFF05
         |    `--U. (P.) prominens (Koenike 1914) RFF05
         |--U. (Poundsatax Vidrine 1992) RFF05
         |    `--U. (P.) retractidens Lundblad 1937 RFF05
         |--U. (Unionicolella Lundblad 1941) RFF05
         |    `--U. (U.) pachyscelus Lundblad 1941 RFF05
         |--U. (Unionicolides Lundblad 1937) RFF05
         |    |--U. (U.) bonariensis Mauri & Alzuet 1972 RFF05
         |    `--U. (U.) sica Lundblad 1937 RFF05
         `--U. (Wilsonatax Vidrine 1992) RFF05
              |--U. (W.) plaumanni Lundblad 1937 RFF05
              `--U. (W.) viciniseta (Lundblad 1936) RFF05

*Type species of generic name indicated

REFERENCES

[BBM91] Baker, R. A., S. Brett & N. Morley. 1991. Water mite larvae parasitic on insects—a study of larval structures and host relationships. 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. 493-496. SPB Academic Publishing: The Hague.

[BK91] Biesiadka, E., & W. Kowalik. 1991. Water mites (Hydracarina) as indicators of trophy and pollution in lakes. 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. 475-481. SPB Academic Publishing: The Hague.

[C91] Conroy, J. C. 1991. Acarology—a modern science. 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. 5-16. SPB Academic Publishing: The Hague.

[PW01] Proctor, H., & K. Wilkinson. 2001. Coercion and deceit: Water mites (Acari: Hydracarina) and the study of intersexual conflict. In Acarology: Proceedings of the 10th International Congress (R. B. Halliday, D. E. Walter, H. C. Proctor, R. A. Norton & M. J. Colloff, eds) pp. 155-169. CSIRO Publishing: Melbourne.

[PH91] Punčochár, P., & J. Hrbáček. 1991. Water mites in the plankton of Hubenov Reservoir and their relations to fish stock composition. 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. 449-457. SPB Academic Publishing: The Hague.

[RFF05] Rosso de Ferradás, B. & H. R. Fernández. 2005. Elenco y biogeografía de los ácaros acuáticos (Acari, Parasitengona, Hydrachnidia) de Sudamérica. Graellsia 61 (2): 181-224.

[S86] Schwoerbel, J. 1986. Acari: “Hydrachnellae”. In Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) (L. Botosaneanu, ed.) pp. 652-696. E. J. Brill / Dr. W. Backhuys: Leiden.

[WL09] Walter, D. E., E. E. Lindquist, I. M. Smith, D. R. Cook & G. W. Krantz. 2009. Order Trombidiformes. In: Krantz, G. W. & D. E. Walter (eds) A Manual of Acarology, pp. 233-420. Texas Tech University Press.

[WP99] Walter, D. E. & H. C. Proctor. 1999. Mites: Ecology, Evolution and Behaviour. CABI Publishing: Wallingford (UK).

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