background : ligulae intestinalis is a parasitic cestode, which has the economic-health importance in fishery industries. the aim of this study was to determine the prevalence of this parasite in mazandaran. the effects of habitat temperature and kind of pool (sandy-cement) were considered as well. methods : in this study, 103 fish samples were obtained in all stages; the samples (male and fema...

The final instar larva of Rhionaeschna vigintipunctata (Ris) (Odonata, Aeshnidae) is described for the first time. The description is based on a series of mature female larvae collected in Tucumán (NW Argentina) and reared to imago. It shares the U-shaped distal excision of epiproct with other larvae of the Marmaraeschna group (only R. pallipes and R. brevicercia known from this stage); but the...

Foveocrotaphus gen. nov. and new species F. burmanicus from Myanmar is described. The new genus is similar to Physocrotaphus Parry, with respect to shape and structure of ligula and paraglossae. The two genera can be diagnosed easily by median tooth of mentum, bifid in Physocrotaphus, i.e. Foveocrotaphus gen. n. has simple, narrow and pointed. Is distinguishable from all other known Physocrotap...