Abstract
During a project of the Luxembourg National Museum of Natural History the parasitism of water mites dwelling a small stream (Lurenzgriecht) in the southern part of the country (Gutland) was investigated. The first step of the project was to clarify the taxonomy of the larvae of all stream-dwelling species. For that reason emergence traps were installed in the stream during 2002 and emptied every 14 days to obtain parasitized hosts. Additionally, rearing experiments were implemented in the laboratory to produce larvae of well-defined species/mothers but only with partly success. The stream has a well-known water mite inventory of 22 species, almost equally composed of true benthic species and species strongly adapted to hyporheic interstitial. The larvae of five species (Torrenticola elliptica, Atractides pumilus, Feltria motasi, Ljania macilenta, Neoacarus hibernicus) were described here as new to science. Due to the poor quality and availability of former descriptions a re-description was made for another species living in the stream (Sperchon denticulatus-gr.) and, additionally, for Hygrobates fluviatilis, a common stream-dwelling species of the area. The larvae of nine species of the Lurenzgriecht had already been sufficiently described for identification purposes (Protzia eximia, Sperchonopsis verrucosa, Sperchon clupeifer, S. thienemanni, Lebertia glabra, Atractides fonticolus, Feltria rouxi, Ljania bipapillata, Aturus fontinalis). The larvae of some other species (Aturus crinitus, Kongsbergia spp., Stygohydracarus subterraneus, Arrenurus haplurus) could neither be reared in the lab nor attributed to species for taxonomic reasons. With the exception of Kongsbergia spp. (no known larva of the genus worldwide) and Aturus crinitus (a rare species in the Lurenzgriecht) an identification key was compiled for the larvae of all known species of the stream using the new descriptions and all available information on the other ones.
References
Biesiadka, E. & Cichocka, E. (1984) Studies on the morphology of larval stages of water mites (Hydracarina). 1. Description of three species of the genera Protzia Piersig and Sperchon Kramer. Annales Zoologici, 38 (7), 159–171.
Böttger, K. (1972a) Vergleichend biologisch-ökologische Studien zum Entwicklungszyklus der Süßwassermilben (Hydrachnellae, Acari). I. Der Entwicklungszyklus von Hydrachna globosa und Limnochares aquatica. Internationale Revue der gesamten Hydrobiologie und Hydrographie, 57 (1), 109–152.
http://dx.doi.org/10.1002/iroh.19720570105
Böttger, K. (1972b) Vergleichend biologisch-ökologische Studien zum Entwicklungszyklus der Süßwassermilben (Hydrachnellae, Acari). II. Der Entwicklungszyklus von Limnesia maculata und Unionicola crassipes. Internationale Revue der gesamten Hydrobiologie und Hydrographie, 57 (2), 263–319.
http://dx.doi.org/10.1002/iroh.19720570206
Böttger, K. (1972c) Parasitologische Beziehungen zwischen Wassermilben und Trichopteren. Zoologischer Anzeiger, 188 (3/4), 154–156.
de Jong, Y.S.D.M. (Ed.) (2013) Fauna Europaea version 2.6.2.. Available from:http://www.faunaeur.org (accessed 3 March 2015)
Efford, I. E. (1966) The larvae of Feltria romijni. Acarologia, 8 (3), 456–459.
Di Sabatino, A., Gerecke, R., Gledhill, T. & Smit, H. (2010) Acari, Hydrachnidia II. Süßwasserfauna von Mitteleuropa Vol. 7, 2–2, Spektrum, Heidelberg, Germany, 234 pp.
Gerecke, R. (2003) Water mites of the genus Atractides Koch, 1837 (Acari: Parasitengona: Hygrobatidae) in the western Palaearctic region: a revision. Zoological Journal of the Linnean Society, 138 (2/3), 141–378.
http://dx.doi.org/10.1046/j.1096-3642.06-0.00051.x
Gerecke, R. (2012) Studies on European Feltria species (Acari: Hydrachnidia: Feltriidae). Stuttgarter Beiträge zu Naturkunde A, Neue Serie, 5, 13–47.
Gerecke, R. (2014) Studies on European species of the water family Aturidae Thor (Acari: Hydrachnidia). Zootaxa, 3841 (1), 1–46.
http://dx.doi.org/10.11646/zootaxa.3841.1.1
Gerecke, R. & Schwoerbel, J. (1991) Water quality and water mites (Acari, Actinedida) in the upper Danube region, 1959–1984. In: Bukva, F. & Dusbábek, V. (Eds), Modern acarology, Bd. 1. The Haque: Academia, Praque & SPB Academic Publishing bv, pp. 483–491.
Gerecke, R. & Martin, P. (2006) Spinnentiere: Milben (Chelicerata: Acari). In: Gerecke, R. & Franz, H. (Eds), Quellen im Nationalpark Berchtesgaden. Lebensgemeinschaften als Indikatoren des Klimawandels. - Nationalpark Berchtesgaden Forschungsbericht, 51, pp. 122–149.
Gerecke, R., Stoch, F., Meisch, C. & Schrankel, I. (2005) Die Fauna der Quellen und des hyporheischen Interstitials in Luxemburg. Ferrantia, 41, 1–140.
Gerecke, R. & Tuzovskij, P. (2001) The water mite Rutripalpus limicola Sokolow, 1934, new data on morphology and biology, and considerations on the systematic position of the monotypic family Rutripalpidae (Acari, Hydrachnidia). Journal of Natural History, 35, 931–944.
http://dx.doi.org/10.1080/00222930152123657
Gledhill, T. (1969) Some observations on the phreaticolous water-mite Neoacurus hibernicus Halbert (Hydrachnellae, Acari). Proceedings of the 2nd international congress of acarology 1967, pp. 75–80.
Imamura, T. (1951) Studies on three water-mites from Hokkaido parasitic on midges. Journal of the Faculty of Science Hokkaido University, Series VI, Zoology, 10, 274–288.
Jones, R.K.H. (1967) Descriptions of the larvae of Aturus scaber Kramer, Protzia eximia Protz and Piona uncata Koenike with notes on the life-histories of the latter two. [Hydracarina]. Annales de limnologie, 3 (2), 231–247.
http://dx.doi.org/10.1051/limn/1967011
Lundblad, O. (1927) Die Hydracarinen Schwedens. I. Beitrag zur Systematik, Embryologie, Ökologie und Verbreitungsgeschichte der schwedischen Arten. Zoologiska Bidrag fran Uppsala, 11, 185–540.
Lundblad, O. (1930) Die Hydracarinen der Insel Bornholm. Kongelige Danske Videnskabernes Selskab, Biologiske Meddelelser, 8, 1–96.
Martin, P. (1998) Zur Autökologie der Wassermilben (Hydrachnidia, Acari) zweier norddeutscher Tieflandbäche. Ph.D. thesis, University of Kiel, 269 pp.
Martin, P. (2000) Larval morphology and host-parasite associations of some stream living water mites (Hydrachnidia, Acari). Archiv für Hydrobiologie/Supplement, 121/3–4, Monographical Studies, 269–320.
Martin, P. (2003) Larval morphology of spring-living water mites (Hydrachnidia, Acari) from the Alps. Annales de Limnologie - International Journal of Limnology, 39 (4), 363–393.
http://dx.doi.org/10.1051/limn/2003029
Martin, P. (2006) On the morphology and classification of larval water mites (Hydrachnidia, Acari) from springs in Luxembourg. Zootaxa, 1138, 1–44.
Martin, P. (2008) Wassermilben (Hydrachnidia, Acari) und Insekten: Ein Überblick über eine selten betrachtete Beziehung. Entomologie heute, 20, 45–75.
Martin, P. (2009) Wassermilbenlarven als Insektenparasiten - Zum Stand ihrer Bearbeitung in Europa. Deutsche Gesellschaft für Limnologie (DGL) - Erweiterte Zusammenfassungen der Jahrestagung 2008 (Konstanz), Hardegsen 2009, 586–590.
Martin, P. & Gerecke, R. (2009) Diptera as hosts of water mite larvae - an interesting relationship with many open questions. Lauterbornia, 68 (First International Conference on Diptera and their juvenile stages in aquatic and semiaquatic ecosystems in Europe held in Bad Bevensen/Germany 13/16-03-2009 - Proceedings of the conference), 95–103.
Martin, P. & Speth, S. (1996) Die substratspezifische Verteilung der Hydrachnidia (Acari) zweier Bäche in jungglazialen Sandergebieten Schleswig-Holsteins (Osterau und Rodenbek). Limnologica, 26 (1), 93–103.
Martin, P. & Stur, E. (2006) Parasite-host associations and life cycles of spring-living water mites (Hydrachnidia, Acari) from Luxembourg. Hydrobiologia, 573, 17–37.
http://dx.doi.org/10.1007/s10750-006-0246-5
Martin, P., Stur, E. & Wiedenbrug, S. (2010) Larval parasitism of spring-dwelling alpine water mites (Hydrachnidia, Acari) a study with particular reference to chironomid hosts. Aquatic Ecology, 44 (2), 431–448.
http://dx.doi.org/10.1007/s10452-009-9301-4
Meyer, E. (1985) Der Entwicklungszyklus von Hydrodroma despiciens (O. F. Müller 1776) (Acari: Hydrodromidae). Archiv für Hydrobiologie/Supplement, 66, 13 (3), 321–453.
Meyer, E. & Schwoerbel, J. (1981) Untersuchungen zur Phänologie der Wassermilben (Hydracarina) des Mindelsees. Archiv für Hydrobiologie/Supplement, 59, 12 (2/3), 192–251.
Müller, H. (2015) Morphologie, Taxonomie und Parasitismus einiger Wassermilbenlarven und einer Nymphe (Acari: Hydrachnidia) in der Saale (Thüringen). Lauterbornia, 80, 69–111.
Müller, H. & Meidl, E.-B. (2013) Beitrag zur Kenntnis der Wassermilbenfauna (Arachnida: Acari) des hyporheischen Interstitials von Fließgewässern in Thüringen. Lauterbornia, 76, 47–68.
Orghidan, T. (2010) A new habitat of subsurface waters: the hyporheic biotope. Fundamental and Applied Limnology / Archiv für Hydrobiologie, 176 (4), 291–302.
Piersig, R.G. (1896–1899) Deutschlands Hydrachniden. Zoologica, 19, 601 pp.
http://dx.doi.org/10.5962/bhl.title.14043
Piersig, R. (1901) Acarina, Hydrachnidae. In: Piersig, R. & Lohmann, H. (Ed.), Das Tierreich. Eine Zusammenstellung und Kennzeichnung der rezenten Tierformen., 13. Lieferung. Friedländer und Sohn, Berlin, 336 pp.
http://dx.doi.org/10.5962/bhl.title.1210
Prasad, V. & Cook, D.R. (1972) The taxonomy of water mite larvae. Memoirs of the American Entomological Institute, 18, 326pp.
Proctor, H.C., Smith, I.M., Cook, D.R. & Smith, B.P. (2015) Chapter 25 - Subphylum Chelicerata, Class Arachnida. In: Rogers, J.H. & Thorp, D.C. (Eds), Thorp and Covich’s Freshwater Invertebrates (Fourth Edition). Academic Press, Boston, pp. 599–660.
http://dx.doi.org/10.1016/b978-0-12-385026-3.00025-5
Rolff, J. (2001) Evolutionary ecology of water mite-insect interactions: a critical appraisal. Archiv für Hydrobiologie, 152 (3), 352–368.
Schechtel, M.E. (1910) Beitrag zur Kenntnis der Hydrachnidengattung Feltria. Bulletin international de l'Académie des Sciences de Cracovie, Classe des Sciences Mathématiques et Naturelles. Série B. Sciences naturelles, 629–637.
Schwoerbel, J. (1967) Das hyporheische Interstitial als Grenzbiotop zwischen oberirdischem und subterranem Ökosystem und seine Bedeutung für die Primär-Evolution von Kleinsthöhlenbewohnern. Archiv für Hydrobiologie/Supplement, 33, 6 (1), 1–62.
Smith, B.P. (1998) Loss of larval parasitism in parasitengonine mites. Experimental and Applied Acarology, 22 (4), 187–200.
http://dx.doi.org/10.1023/a:1006010230247
Smith, I.M. (1976) A study of the systematics of the water mite family Pionidae (Prostigmata: Parasitengona). Memoirs of the Entomological Society of Canada, 98, 249 pp.
http://dx.doi.org/10.4039/entm10898fv
Smith, I.M. (1978) Descriptions and observations on host associations of some larval Arrenuroidea (Prostigmata: Parasitengona), with comments on phylogeny in the superfamily. The Canadian Entomologist, 110, 957–1001.
http://dx.doi.org/10.4039/Ent110957-9
Smith, I.M. (1982) Larvae of water mites of the genera of the superfamily Lebertioidea (Prostigmata: Parasitengona) in North America with comments on phylogeny and higher classification of the superfamily. The Canadian Entomologist, 114, 901–990.
http://dx.doi.org/10.4039/Ent114901-10
Smith, I.M. (1983) Description of larvae of Neoacarus occidentalis (Acari: Arrenuroidea: Neoacaridae). The Canadian Entomologist, 115 (3), 221–226.
http://dx.doi.org/10.4039/Ent115221-3
Smith, I.M. (1984) Larvae of water mites of some genera of Aturidae (Prostigmata: Hygrobatoidea) in North America with comments on phylogeny and classification of the family. The Canadian Entomologist, 116, 307–374.
http://dx.doi.org/10.4039/Ent116307-3
Smith, I.M. (1992) North American species of the genus Chelomideopsis Romijn (Acari: Arrenuroidea: Athienemanniidae). The Canadian Entomologist, 124, 451–490.
http://dx.doi.org/10.4039/Ent124451-3
Smith, I.M. & Oliver, D.R. (1986) Review of parasitic associations of larval water mites (Acari: Parasitengona: Hydrachnida) with insect hosts. The Canadian Entomologist, 118, 407–472.
http://dx.doi.org/10.4039/Ent118407-5
Smith, I.M., Cook, D.R. & Smith, B.P. (2009) Water mites (Hydrachnida) and other arachnids. In: Thorp, J.H. & Covich, A.P. (Eds) Chapter 15, Ecology and Classification of North American Freshwater Invertebrates. 3rd edition. Academic Press, San Diego, 485–586.
http://dx.doi.org/10.1016/b978-0-12-374855-3.00015-7
Smukalla, R. & Meyer, E. (1988) Insect emergence from a shallow southern West German Lake, with special reference to the parasitic host-associated water mite larvae. Hydrobiologia, 169, 149–166.
http://dx.doi.org/10.1007/bf00007307
Soar, C.D. & Williamson, W. (1929) The British Hydracarina. Vol. III. Ray Soc., London 115, 8+184+40pp.
Sparing, I. (1959) Die Larven der Hydrachnellae, ihre parasitische Entwicklung und ihre Systematik. Parasitologische Schriftenreihe, 10, 1–165.
Thor, S. (1914) Glazialbiologische Beiträge. Internationale Revue der Hydrobiologie und Hydrographie, Biologisches Supplement, 3, zu 6, 1–14.
http://dx.doi.org/10.1002/iroh.19140061004
Tuzovskij, P.V. (1977) Postembryonic development of water mite Sperchon clupeifer (Acariformes, Sperchonidae). Zoologicheskii Zhurnal, 56 (11), 1616–1628.
Tuzovsky, P.V. (1982) Postembryonic stages of Torrenticola amplexa (Koenike, 1908) (Acariformes, Torrenticolidae). Entomological Review, 60 (2), 176–184.
Tuzovskij, P.V. (2010a) Larval morphology of the water mite Sperchonopsis reducta Sokolow, 1940 (Acariformes, Sperchontidae). Zoosystema Rossica, 19 (1), 23–28.
Tuzovskij, P.V. (2010b) On diagnostics of the water mite Sperchon hispidus (Acariformes, Sperchontidae). Entomological Review, 90 (4), 473–480.
http://dx.doi.org/10.1134/s0013873810040081
Ullrich, F. (1976) Biologisch-ökologische Studien an rheophilen Wassermilben (Hydrachnellae, Acari), unter besonderer Berücksichtigung von Sperchon setiger (Thor 1898). Ph.D.thesis, University of Kiel, 241 pp.
Ullrich, F. (1978) Biologisch-ökologische Studien an den Larven rheophiler Wassermilben (Hydrachnellae, Acari), Schlitzer Produktionsbiologische Studien (29). Archiv für Hydrobiologie/Supplement, 54 (2), 189–255.
Vercammen-Grandjean, P.H. (1980) Analyse critique de la systématique de deux sous-families d`Hydracariens: Wandesiinae Schwoerbel, 1961 et Stygothrombiinae Thor, 1935. Folia Parasitologica, 27, 151–164.
Viets, K. (1936) Wassermilben oder Hydracarina (Hydrachnellae und Halacaridae). In: Dahl, F. (Ed.), Die Tierwelt Deutschlands und der angrenzenden Meeresteile nach ihren Merkmalen und ihrer Lebensweise. Gustav Fischer Verlag, Jena, 575 pp.
Viets, K.O. (1978) Hydracarina. In: Illies, J. (Ed.), Limnofauna Europaea, 2. Aufl., G. Fischer, Stuttgart, pp. 154–181.
Wainstein, B.A. (1980) Opredelitel lichinok vodjanych kleshchei. Trudy - Institut Biologii Vnutrennikh Vod, Akademiya Nauk SSSR, 238 pp. [in Russian]
Walter, C. (1922a) Hydracarinen aus den Alpen. Revue Suisse de Zoologie, 29 (7), 227–411.
Walter, C. (1922b) Die Hydracarinen der Alpengewässer. Denkschriften der Schweizerischen Naturforschenden Gesellschaft, 58 (2, I–XI), 60–251.
Wiles, P.R. (1987) Observations on the parasitic biology of the water mite Hydrodroma despiciens pilosa Besseling (Acari: Hydrodromidae). Archiv für Hydrobiologie/Supplement, 76 (4), 369–392.
Zawal, A. (2002) Parasitism of water mite larvae (Hydrachnellae) of the genus Hydrachna on water beetles in Poland. Acarologia, 42 (4), 361–370.
Zawal, A. (2003) Parasitism of water mite (Hydrachnellae) larvae of the genus Eylais on water beetles in Poland. Acarologia, 43 (1), 39–47.
Zawal, A. (2008) Morphological characteristics of water mite larvae of the genus Arrenurus Dugès, 1834, with notes on the phylogeny of the genus and an identification key. Zootaxa, 1765, 1–75.