Reference work entry
Genus of the nematode family Oxyuridae. Syphacia spp. ( S. muris, S. obvelata) and Aspiculuris spp. occur in the ceca and colon of rats, mice, and hamsters. Males are 1.5 μm, females up to 4.5 mm long. The eggs of S. obvelata are crescent shaped (150 × 50 μm) and contain only a morula ( S. muris contains a larva), Fig. 1.
© Springer-Verlag Berlin Heidelberg 2016