The eggshell morphology of Heterodoxus spiniger, infesting dog, Canis familiaris (Boopidae, Mallophaga)

The egg chorion of the dog louse Heterodoxus spiniger bears pentagonal / rectangular scutes (scale like sculpturing) arranged obliquely. The opercular disc of the egg bears tall cup shaped micropyles which unite to give ridge like appearance. The centre of the disc bears short thick rod like polar thread