Parasitology

OVIPAROUS NEMATODES
Laying unsegmented eggs -
  Ascaris lumbricoides,
  T.trichiura

Laying eggs with segmented ova -
A.duodenale,
N americanus,
Trichostrongylus spp.,
Ternidens deminutus,
Oesophagstomum spp.

Laying eggs containing larva -
Enterobius vermicularis

VIVIPAROUS NEMATODES
Dracunculus medinensis,
Wuchereria bancrofti,
B malayi, B. timori
Trichinella spiralis