An Initial Classification of Neotropical Water Mites (Acari: Hydrachnidia) Based on Habitat Preferences

Table 1

Taxonomic list of Hydrachnidia present south of latitude S 15 in South America (modified from Rosso de Ferradás and Fernández, 2005), with numbers of species indicated as well as functional classification. Un—Unknown, T—Thermal, P—Planktonic, S—Superficial, B—Benthic, Sx—Stygoxene, Oh—Occasional hyporheos, Pe—Permanent hyporheos, U—Ubiquitous stygobite, Ph—phreatobyte.

Superfamily/Family	Genus, number of species and functional classification
Hydrachnidea
Hydrachnidae	Hydrachna 7B
Eylaoidea
Limnichidae	Neolimnochares 3B, Rhyncholimnochares 6B
Eylaidae	Eylais 13P
Hydryphantoidea
Hydrophiidae
Hydryphantinae	Hydryphantes 5P/3B
Thyadinae	Notopanisus 1B
Protziinae	Neocalonyx 12S/5B
Wandesiinae	Wandesia 2T/6Ph, Euwandesia 1Ph
Antelothyadinae	Ankelothyas 1Un
Hydrodromidie	Hydrodroma 4B
Rhynchohydracaridae
Rhynchohydracarinae	Rhynchohydracarus 2Un/1B
Clathrosperchontinae	Clathrosperchon 2B/1Sx, Clathrosperchonella 2Un
Thermacaridae	Thermacarus 2T
Lebertioidea
Sperchontidae
Sperchontinae	Notosperchonopsis 3B, Illiesiella 6B, Sperchon 5B
Apeltosperchontinae	Apeltosperchon 1B
Anisitsiellidae
Anisitsellidae	Anisitsiella 1B, Anisitsiellides 4B, Mamersellides 1B, Rutacarus 3U, Sigthoriella 1U
Oxidae	Oxus 2P/4B, Frontipoda 13B/2Un
Torrenticolidae
Neoatractidinae	Neoatractides 2B
Torrenticolinae	Torrenticola 4B/1Oh
Hygrobatoidea
Limnesiidae
Neomamersinae	Neomamersa 6U, Meramecia 2U
Tyrrelinae	Tyrrellia 5B, Neotyrrellia 4B
Neotorrenticolinae	Neotorrenticola 7Un
Protolimnesiinae	Protolimnesia (Protolimnesella) 2U, P. (Protolimnesia) 2B/1Oh/1Pe Crenolimnesia 2Un, Limnesides 1Un
Mixolimnesiinae	Mixolimnesia 8Pe,
Limnesinae	Limnesia (Allolimnesia) 2S, L. (Limnesia) 1P/5S/23B, L. (Limnesiella) 5S, L. (5 subgenus) 7S, Centrolimnesia 2S, Tubophorella 1B
Omartacaridae	Omartacarus 3Ph
Hygrobatidae
Hygrobatinae	Hygrobates 20B, Aspidiobates 1B, Atractidella 1T/6B/1Sx, Atractides 7B/1Oh, Australiobates 7B, Brevaturus 10B, Callumobates 1B, Camposea 1U, Corticacarus 41B/1Oh, Crenohygrobates 1Un, Deccussobates 2B, Diamphidaxona 3U, Dodecabates 1B, Dubiobates 10B, Eocorticacarus 1B, Hygrobatella 10B, Paraschizobates 1S, Mapuchacarus 1B, Megapellia 2B, Motasia 1B, Osornobates 1B, Schizobates 4B, Tetrahygrobatella 3B, Zabobates 3B
Rhynchaturinae	Rhynchaturus 7B, Andesobates 1B, Szalayella 1B
Ferradasiidae	Ferradasia 1S
Unionicolidae
Pionatacinae	Koenikea 35S, Neumania 5S, Recifella 3S
Pionidae
Pioninae	Piona 8P
Aturidae
Frontipodopsinae	Frontipodopsis 2B
Aturinae	Aturus 1B, Kongsbergia 1B, Neoaturus 1B
Axonopsinae	Axonopsella 12Oh/1Pe, Axonopsis 1B, Lethaxonella 1U, Miraxonides 2B, Stygalbiella 1U
Albiinae	Albia 1S
Notoaturinae	Notoaturus 4U, Noesaturus 4U, Notaxona 1B
Arrenuroidea
Momoniidae	Momoniella 1B, Notomomonia 3U
Mideopsidae	Mideopsis 17S, Phreatomideopsis 1Pe
Krendowskiidae	Krendowskia 2B, Geayia 1B
Arrenurus	Arrenurus (Truncaturus) 4U, Arrenurus 25B,
	Thoracophoracarus 2B