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UT Arlington BIOL 3454 - Phylum Mesozoa
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BIOL 3454 1st Edition Lecture 14I. zoology lecture10/10II. schistosoma - female has gen... canal; male fits in inIII. phylum mesozoa- greek mesos (middle) zoon (animal)- missing link - between protozoa & metazoa-parasites & symbionts- most only in 20-30 cells into 2 layers- rhomozoans- orthonectids- will be a ? from this slideIV. phylum Nemertea- ribbon worms, nemertes one of the nereids unerring one- refers to the sharp aim of the probosicisV. characteristics- ecersible proboscis unique nemerteansmostly free living a few parasiticbilateral symmetry cylindriacal anteriorly & flattened posteriorlyVI. basics- true circulatory system no respiratory system- candy cane worm- spear on the end grab and pull in3-4 ?s on where did the parasiticparagonomis - lunk flukeend of chapterchapter 15:I. Gnaathiferans & small...These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.II. Phylum Gnathostomulidagreek (gnathos (mouth) stoma (opening)smalljaw wormsIII. phylum Micrognathozoa3 pairs of jawsonly female reproductive organs poorly understoodmove by cilia unique ventral ciliary pad that produces gluelive in sedimaentmonotypic limnognathia maerskidiscovered 1994described in 2000IV. phylum Rotiferalatin root rota (wheel) and fera (bearing)unique organ the corona oar wheel organlots of variation in life history traitssome can desiccate & live for yearsV. external features of rotifers- ciliated corona body non ciliatedmouth on corona on midventral side- cuticle- swim or creepVI. internal featuresmastax - mouth to chewcloaca - 2 tubes next to each other and excrete from same openingciliated pit - first time seen in an animal- can sense lightVII.rotifer reproduction- dioecious no males- bdelloidemonogonata - occur only a few weeks a yrmictic eggsamictic eggsneed to know test questions **VIII. life cycles ofIX. phylum cycliophora- discovered in 1995- mouthparts of decapod crustaceans- eat bacteria of bits of dropped food- ushaped or complete gutX. phylum Gastrotricha- hermaphrodicXI. phylym Entoproctagreek entos (within) proktos- note remember endo and eco- anus opens inside the mouth ringXII. form & function- calyxlook like polypsXIII. three phyla within lophophoraa- very controversaial phylogenetic placement- bryosom (ms) means mossXIV. form & functionXV. phylum brchiopoda- shell called a valve- clams oysters bivalve- brachiopoda have univalveXVI. phylum phoronidawhite heiferXVII. unresolved polytomy- mollusca- annelida- loophotrochozoa phylogenetic


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UT Arlington BIOL 3454 - Phylum Mesozoa

Type: Lecture Note
Pages: 4
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