Porcellium conspersum (C. Koch, 1841)

Boeraeve, Pepijn, Arijs, Gert, Segers, Stijn, Smedt, Pallieter De, Spinicornis & Utm, Belgium. Every grid cell of the, 1908, Habitat and seasonal activity patterns of the terrestrial isopods (Isopoda: Oniscidea) of Belgium, Belgian Journal of Entomology 116, pp. 1-95 : 82

35. Porcellium conspersum (C. Koch, 1841)

( Fig. 20 g , Fig. 39 , Map 35 , Table 37)

Porcellium conspersum occurs commonly in forests south of the rivers Sambre and Meuse ( Map 35 ), with only one record (1.7%) registered in open landscape ( Table 37). Most records in forests were near water (83.1%) with banks of small streams and rivers in deciduous forest as the main habitat for this species ( Table 37). P. conspersum is together with Ligidium hypnorum and Oniscus asellus one of the few species in Belgium that can be found in locations with a high soil acidity.

The corrected number of records is highest from May until August and in November–December ( Fig. 39 ). The species seems to be less commonly found at the beginning of the year (January– April). It is unclear if this is a real pattern or if this is due to random effects or the species’ reproduction cycle.

Figures

Map 35. Distribution map for Porcellium conspersum.

Fig. 20. a, Eluma caelata; b, Cylisticus convexus; c, Porcellio monticola; d, Porcellio scaber; e, Porcellio spinicornis; f, Porcellionides pruinosus; g, Porcellium conspersum; h, Trachelipus rathkii.

Fig. 39. Corrected number of observations per two-month period for Porcellium conspersum (N = 63).