orth oc er id ▁family , ▁Pseud act in oc er at idae . ▁The ▁type ▁species , ▁P . ▁prom is cu um , ▁came ▁from ▁the ▁Lower ▁Car bon ifer ous ▁( V ise an ▁= ▁middle ▁Mississ ipp ian ) ▁of ▁Germany . ▁ ▁See ▁also ▁▁ ▁List ▁of ▁na util oid s ▁ ▁References ▁ ▁S weet , ▁W . C . ▁ 1 9 6 4 . ▁N aut ilo idea - Or th oc er ida , ▁Tre at ise ▁on ▁In verte br ate ▁Pale ont ology ▁Part ▁K , ▁M oll us ca ▁ 3 ; ▁Ge ological ▁Soc . ▁of ▁America ▁and ▁Un iv . ▁Kansas ▁Press . ▁▁ ▁Pale obi ology ▁Database ▁ 1 2 / 1 0 / 0 9 ▁Se pk os ki ' s ▁Online ▁Gen us ▁Database ▁( CE PH AL OP O DA ) ▁ ▁Category : N aut il oid s ▁Category : L ate ▁Dev onian ▁first ▁appearances ▁Category : L ate ▁Dev onian ▁animals ▁Category : Miss iss ipp ian ▁ext in ctions <0x0A> </s> ▁An ▁ov it rap ▁is ▁a ▁device ▁which ▁consists ▁of ▁a ▁dark ▁container ▁containing ▁water ▁and ▁a ▁substr ate ▁where ▁mos qu ito es ▁can ▁lay ▁their ▁eggs . ▁The ▁eggs ▁then ▁fall ▁through ▁the ▁mesh ▁into ▁the ▁water , ▁where ▁the ▁lar va e ▁h atch ▁and ▁develop ▁into ▁pup as . ▁When ▁the ▁adult ▁mos qu ito es ▁emer ge , ▁they ▁are ▁tra pped ▁beneath ▁the ▁mesh