BIOL 2P92 Lecture 1: February 7, 2017
22 Mar 2017
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Entoprocta and ectoprocta names refers to the where the anus opens out (flower shaped) Clade polyzoa: entoprocta = inside, ectoprocta = outside, possi(cid:271)le that they do(cid:374)"t eat the same time they excrete waste. Ea(cid:272)h (cid:272)ha(cid:373)(cid:271)er is (cid:272)alled a zoe(cid:272)iu(cid:373) = (cid:862)little house (cid:449)here so(cid:373)ethi(cid:374)g li(cid:448)es(cid:863) Refractor muscle = band of muscle holds it inside that is used when threatened pulls lophophore in for protection. Statoblast = similar to a cyst (gemmules: water-free ponds in the temperate zones, other locations that may freeze, embryonic form that survives. Each rectangle is the zoecium of one individual that stretches the body. Operculum is a cap used for cover: retracts muscles that pulls lophophore in and closes. Well known from ordovician fossils (440-485 mya), still common. Has a cup-shaped and goblet shaped body. Mouth and tentacles are at the top. Cycliophore = carrier of a round part.
