Panisellus thienemanni (K.Viets, 1920)

Martin, Peter, 2006, On the morphology and classification of larval water mites (Hydrachnidia, Acari) from springs in Luxembourg, Zootaxa 1138, pp. 1-44 : 4-6

Panisellus thienemanni (K.Viets, 1920)

Records ( Table 2): Benthos samples at site Lux Qu25 (E5), 1 May 2002, one female; 17 April 2003, one male, one deutonymph. No larvae found in traps. First record for Luxembourg.

Description of larvae (see Fig. 1 ): Boehle (1996).

Diagnostic characters of larvae: Differing from the other Hydryphantidae treated here with respect to their remarkably shorter legs.

Remarks: Boehle (1996) and Wohltmann (pers. comm.) found the larvae of P. thienemanni parasitic exclusively on collembolans. These potential hosts have not been captured in the emergence traps in the present study. Throughout its distribution area, P. thienemanni is rarely found, the presence of adults being possibly restricted to springtime.

E1 E2 E3 E4 E5 E6 E7 o.s.

Panisellus thienemanni x ­

Panisus michaeli ++

Thyas palustris 461 2 1 +

Thyas pachystoma ++

Thyopsis cancellata 4 +

Partnunia steinmanni ++

Protzia eximia ++

Tartarothyas romanica x x +

Sperchonopsis verrucosa 22 +

Sperchon clupeifer x +

Sperchon denticulatus ++

Sperchon insignis 22 +

Sperchon longissimus 112 9 1 +

Sperchon squamosus 58 93 1 +

Sperchon thienemanni 261 3 1 121 1 +

Bandakia concreta 21 1 +

Lebertia crenophila ++

Lebertia glabra x 50 +

Lebertia holsatica 2 +

Lebertia sefvei 73 28 +

Lebertia stigmatifera x +

Hygrobates norvegicus 88 1 +

Atractides fonticolus 129 74 +

Atractides nodipalpis ++

Atractides pennatus 6 +

Feltria rouxi 1 +

Pseudofeltria scourfieldi 1 4 +

Pionidae indet. (cf. Tiphys sp.) 1 ­

Ljania bipapillata 151 8 353 14 +

Aturus crinitus ++

to be continued

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).