The very long and somewhat humorous animal classification...

Hi and welcome to the classification of animals you shall see in our lab exam this tuesday! I'm going to try to condense it down (and add a bit of wittiness!) so it is easier for you all to get...and it helps me remember it as well. ready or not, here it comes...

KINGDOM: Metazoa (animals)

Subkingdom: parazoa: the "p" category--only two phyla

• Phylum Porifera--sponges (sponges have PORES!), acoelomic, have choanocytes which flow water through the sponge through porocytes and out the osculum (the mouth of the sponge at the top). there are three body types: asconoid, which is just a big single cavity, syconoid, which have side chambers, and leuconoid, which have side chambers coming off the other side chambers...geez..
• Class Calcerea, made of calcium carbonate (no DUH); scypha/grantia are examples. this is an actual picture of it from the lab--if you see a jar of these, it is scypha/grantia. the purple blob is a widthwise slice.
  
• Hexactinellida (hexa--six pronged) has six pronged spicules...looks like two mercedes benz logos stuck together. it is a long white delicate tube thing in lab.
• Desmospongidae--spongy sponges. the ones in your house.
• sclerospongidae--hard sponges. not sure what they look like...google says this:
• Phylum Placozoa: (small multicellular animals found in aquariums...like, placozoa, the ugly plaque on the wall or something?) ;-)

Mesozoa: they are tiny little things we really shouldn't care about...
Eumetazoa: "eu-" means real--these are real animals. there are two superphyla (its a bird! its a plane! NO! its superphyla!) Radiata, and Bilatera.

• Superphyla Radiata: diploblastic (only endo and ectoderm) show radial symmetry (hence the name).
• Phylum Cnidaria--jellyfish, anemones, corals. have ocelli (light sensitive yet not quite an eye), mesoglea (the gooey stuff in jellyfish!) and cnidocytes to sting prey. these hurt...trust me. there are polyps (looking up, an anemone) and medusa (looking down, a jellyfish). There are three classes to know:
  
• Class Hydrazoa, polyp dudes..which include hydra, obelia, Portugese man-o-war. the man o war is NOT a medusa, the top part is an air bladder.
  
• Class Scyphozoa, jellyfish.
• Class Anthozoa (remember last exam, anthophyta, the flowers? antho- means flower) corals and anemones.
• Phylum Ctenophora; lack cnidocytes
• 

• Superphylum Bilatera includes everything else.
• (Acoelomic) Phylum Platyhelminthes;
the flatworms. triploblastic beauties! hermaphroditic! squishy! Classes:

• Class Turbellaria, a Dugesia (planarian). its head looks like a bell...TURBELLARIA! ONWARD!
• Class Trematoda, which has two subclasses, Digenea, the disgusting worms that live in your liver and intestines (Chinese liver fluke and Schistosoma mansoni--know life cycles) and Monogenea (parasitic of fish gills).
• Class Cestoda, tapeworms. they have a scolex (attachment part to host) a strobilus composed of proglottids (reproductive units that make eggs)Examples are Taenia saginata (human beef, sheep, pork, fish) tapeworm and Dipyllidium caninum (dog tapeworm). know the life cycles!
  

• (Acoelomic) Phylum Nemertea (proboscis worms)
• (Pseudocoelomic) Phylum Nematoda, dioecious, free living and parasitic, some parasitic examples include Trichinella (pork worms), Enterobius (pinworms), Ascaris (we dissected these, the white worms), and Ancylostoma (hookworms)
• There are some other phylums of these worms, you should read about them in the study guide.
• (Eucoelmic) Phylum Mollusca; they have a well developed circulatory system and heart; all members (almost!) posses a radula, a plate in their mouth that scrapes food...like a spatula...lol. a mantle which is a bunch of cells that secrete a shell and a cavity with gills and siphons. a foot for moving around. and well developed organs. the classes are:
• Class Gastropoda (snails and slugs)
• Class Pelecypoda/Bivalvia: Clams, oysters, etc.
• Class Polyplacophora: chitons, eight overlapping plates
  
• Class Scaphopoda:they look like worms in an elephant tusk.
• Class Cephalopoda: Octopus, squid, cuttlefish.
• KNOW LIFE CYCLES.
• Phylum Annelida; segmented worms. triploblastic, protostomates, septa separate each segment, have setae (WORM HAIR!!!!)
  
• Class Oligochaeta, earthworms; (oligo- means few, chaeta means setae, oligochaetea means FEW SETAE wow i'm impressive); the clitellum is the reproductive part, closer to the head, is lighter colored. Know life cycle! (and no, i did not draw this awesome diagram)
  
• 
• Class Polychaetes (many setae, many hairs); the little legs are called parapodia.
• 
• Class Hirudinea, leeches; have posterior sucker. no photo, you should know what a leech looks like. :-)
• Phylum Onychophora (walking worms); nothing really to say more about them.
• 
• Phylum Arthropoda (joint footed animals). Have chitin in exoskeleton; some external segmentation; many are social (party animals...he he)
• Subphylum Trilobitaall members extinct.
• Subphylum Chelicerata; lack antennae, with two oral appendages (like fangs, pinchers, etc.), have book gills/lungs; typically four pairs of walking legs; two body regions, the cephalothorax (cephalo- means head, thorax- means thorax..uh..) which is the head and thorax joined together, and the abdomen.
• Class Merostomata, horseshoe crabs there is one of these in lab...it looks like a gigantic cockroach underneath..actually....here.they are harvested for blood.
• Class Arachnida; spiders, ticks, scorpions, mites. you won't forget the arachnids!
  
• Subphylum Crustacea; cephalothorax and abdomen, two pairs of antennae.
• Class Branchiopoda, fairy shrimp and water fleas.
  
• Class Copepodahave one very long antennae, held at right angles...this poor thing has to cope with his long antennae. poor copepoda.
• Class Cirripedia, barnacles. Very serious creatures they are indeed.
• Class Malacostraca; they have a rostrum, carapace, abdomen, and telson (i don't think you need to worry about these parts of the animal).
• Order Decapoda; shrimp, lobster, crab...
• Order Isopoda; no carapace, no distinction from thoracic and abdominal segments...and they're flat. but can roll up. an example: a pill bug.
• Order Amphipoda:there, just think flat shrimp. the first few segments are fused with the head.
• Subphylum Uniramia; in other words, lovely insects.
• Class Insecta; head, thorax, abdomen; one pair of antennae; three pairs of walking legs; spiracles which allow air to flow through to have gas exchange occur (they are like lungs, but not). Metamorphosis is either complete (egg > larva > pupa > adult) or incomplete (egg > nymph [which is a small adult] > adult)
  
• Please, please, look at the orders yourself.
• Class Chilopoda, centipedes. They are chillin. They have one leg on each segment of their body.
• Class Diplopoda, millipedes. they have two legs on each segment of their body. (di- two, diplopoda, two legs a segment? yeah? we good? jk/jk)

Ah, yes. I have been madly typing for hours, and now I need rest. otherwise i might mislead you into thinking millipedes are a member of the nematoda phylum, and i know you know better than that. i will try to post the rest beyond protostomates tomorrow. goodnight all..sweet dreams.