lophophorates and deutrosomes Flashcards
what are the three phylum of lophophorates
1) bryozoa
2) phoronida
3) brachiopoda
what are the three phylum of deuterostomes
1) Echinodermata
2) hemichordata
3) chordata
what is a lophophore
a food-catching tentacular organ
what characteristics do all lophophorates have
1) sessile
2) poorly developed head
3) secrete a protective covering
4) u-shaped digestive tract
outline some characteristics of the phylum bryozoa
- aquatic
- sessile = filter feeding, hermaphrodites
- minute
- colonial = polymorphic
- zooid
what is a zooid
an animal arising from another by budding or division
outline some characteristics of the phylum phoronida
- marine, worm-like
- chitinous tubes buried in sand
- less than 20cm
- lophophore for filter feeding
outline some characteristics of the phylum brachiopoda
- resemble bivalve molluscs
- marine
- attached to rocks by a pedicel
outline the some characteristics of the phylum echinodermata
- spiny skin
- starfish, sea urchins, sea cumbers
- pentamerous radial symmetry
- larvae bilateral
- endoskeleton made of ossicles
what class are sea cucumbers
holothuridea
what class are sea urchins and sand dollars
echinoidea
what is the mechanism aristotles lantern
a mechanism used by urchins which scrape food off of hard surfaces
what class are starfish
stellaroidea
what are the two main classes of the phylum hemichordata as part of the deutrosomes
1) enteropmeusta (acrom worms)
2) pterobranchia
what are thre three sub-phyla of the phylum chordata as part of deutrosomes
1) tunicata
2) cephalochordata
3) vertebrata
