Thyas palustris Koenike, 1912

Martin, Peter, 2006, On the morphology and classification of larval water mites (Hydrachnidia, Acari) from springs in Luxembourg, Zootaxa 1138, pp. 1-44 : 7

Thyas palustris Koenike, 1912

Records ( Table 2): Benthos samples at four springs in Gutland and in Ösling, 9 individuals ( Gerecke et al. 2005). E1 17 larvae, E3 67 larvae, parasitic on Limoniidae . Attribution by comparison with Martin (2003).

Description of larvae ( Figs. 2, 3 ): Martin (2003).

Diagnostic characters of larvae: In contrast to the other Hydryphantidae reported here relatively small in dimensions (e.g. length of idiosoma, leg, chelicera).

Remarks: The taxonomic state of T. rivalis Koenike, 1912 , proposed as a synonym of T. palustris by Lundblad (1962), is still an unsolved problem (Gerecke, pers. comm.). The larval description of Biesiadka & Cichocka (1990) for T. rivalis does not include details that enable a separation from T. palustris .

Figures

FIGURES 1 – 7. Fig. 1: Panisellus thienemanni, ventral idiosoma and gnathosoma (redrawn and modified from Boehle 1996), Fig. 2: Panisus michaeli, ventral idiosoma, Fig. 3: Panisus michaeli, I­L, Fig. 4: Thyas palustris, ventral idiosoma, Fig. 5: Thyas palustris, II­L (Figs. 2 – 5 from Martin 2003), Fig. 6: Thyopsis cancellata, dorsal idiosoma, Fig. 7: T. cancellata, area of dorsal plate (Figs. 6 – 7 from Martin 2000).