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Nanorchestes
NANORCHESTIDAE Grandjean 1937
Nanorchestes Topsent & Trouessart 1937
Type species: Nanorchestes amphibius Topsent & Trouessart 1937
(= Monalicus arboriger Berlese 1904)
(Gainia nivalis Trouessart 1914 = Nanorchestes gressitti Strandtmann 1982)
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Nanorchestes africanus Theron & Ryke, 1969 – South Africa Nanorchestes arboriger (Berlese, 1904) Italy Nanorchestes antarcticus Strandtmann, 1963 - Antarctica Nanorchestes bellus Strandtmann & Somme, 1977 – Antarctica, Macquarie Is Nanorchestes bifurcatus Strandtmann, 1967 - Antarctica Nanorchestes brekkerista Strandtmann & Somme, 1977 Antarctica, Macquarie Is Nanorchestes capensis Theron & Ryke, 1969 – South Africa Nanorchestes coatesi Theron & Ryke, 1969 – South Africa Nanorchestes collinus Hirst 1918 – England, Alaska, Canada Nanorchestes exertus Theron & Ryke, 1969 – South Africa Nanorchestes gilli Strandtmann, 1982 - Alaska Nanorchestes globosus Theron & Ryke, 1969 – South Africa Nanorchestes hoffmannae Vazquez – Mexico Nanorchestes hutchinsoni Luxton – NSW intertidal Nanorchestes jodiae Strandtmann, 1982 - Alaska |
Nanorchestes lalae Strandtmann, 1982 – Antarctica Nanorchestes llanoi Strandtmann, 1982 - Alaska Nanorchestes macquariensis Strandtmann, 1982 – Macquarie Is Nanorchestes marianae Strandtmann, 1982 – Macquarie Is Nanorchestes memelensis Theron & Ryke, 1975 – South Africa Nanorchestes nivalis (Troussart, 1914) – Antarctica Nanorchestes pollicaris Theron & Ryke, 1969 – South Africa Nanorchestes pseudocollinus Schuster, 1958 – Europe Nanorchestes pulvinar Grandjean, 1942 – Europe Nanorchestes siculus (Berlese, 1910) – Italy Nanorchestes triclavatus Booth, 1984 - Antarctica Nanorchestes usualis Theron & Ryke, 1969 – South Africa Nanorchestes watsoni Strandtmann, 1982 – Macquarie Is Nanorchestes willbanksi Strandtmann, 1981 – Antarctica |
DIAGNOSIS.
Body globular. Prodorsum with 4 pairs of setae (le, exa,
in, exp) and 2 pairs of filiform trichobothria (bo, ro);
ro with latch-like seta le; naso without setae; one pair of lateral
eyes and median eye usually present. Labrum tubular, elongate and well
sclerotised; chelicerae weakly dentate, each with 2 setae; rutella simple or
highly modified; 2-3 pairs of adoral setae and 3 pairs of hypostomal setae;
palps with 4-5 free segments. Opisthosoma hypertrichous, setae typically
dendritic; 2-3 pairs of genital papillae.
REMARKS. The empodial claw of nanorchestid mites has a swollen basal region densely covered in setules and a smooth distal claw, and resembles the empodial claw of Alycosmesis (Terpnacaridae). Species of Nanorchestes are diverse and abundant in beach sand, dry forest soil, grasslands, mosses, and dry and cold deserts, and are the dominant form of animal life in Antarctica.
SIMILAR TAXA. Neonanorchestes is identical except for having one clavate pair of trichobothria.
References
Kethley JB. 1982. Endeostigmata. pp. 118-120, In: Parker SP (ed.) Synopsis and classification of living organisms. McGraw-Hill, NY.
Kethley JB. 1990. Acarina: Prostigmata (Actinedida). pp. 667-756, In: DL Dindal (ed), Soil Biology Guide. John Wiley & Sons, Brisbane.