Phylum Characteristics Flashcards
Phylum Porifera unique characteristic
spongin: collagen protein that makes up skeleton
osculum: large opening of sponge
Ostia: small holes in sponge
Phylum Cnidaria unique characteristic (jellyfish, anemones, coral)
cnidocytes (stinging cells)
Class Hydrozoa Unique Characteristic
polyp stage is physically and temporally dominant
Class Scyphozoa (true jellyfish)
medusa stage is physically and temporally dominant
Class Anthozoa Unique Characteristic (sea anemone and coral)
No medusa stage, just planula and polyp
Phylum Platyhelminthes Unique Characteristic (Class Turbellaria, Trematoda, Cestoda)
dorsoventrally flattened body shape
Class Turbellaria Unique Characteristic (organism with two little eyes, symmetric body)
flatworms that don’t parasitize other animals
Class Trematoda Unqiue Characteristic (flukes)
presence of sucker in oral and posterior part of body
Class Cestoda Unique Characteristic (tapeworms)
lack digestive system, don’t have body cavity
scolex (oral sucker with rostellum and suckers) used for host attachment
Phylum Rotifera Unique Characteristic (microscopic, near microscopic aquatic animals)
structure of foot, toe, and corona (look like lips)
Phylum Mollusca Unique Characteristic (classes bivalvia, gastropoda, cephalopoda, polyplacophora)
a mantle with mantle cavity and a shell (if not lost)
Class Bivalvia Unique Characteristic (mussels, clams, etc.)
Two shells that meet at a hinge
Class Gastropoda Unique Characteristic (snails, slugs, whelks, conch)
2 eye stalks, large muscular foot
Class Cephalopoda Unique Characteristic (squid, octopi, nautilus)
multiple tentacles
Class Polyplacophora Unique Characteristic (chitons)
Plate-like shell that is segmented into 8 pieces
Phylum Nematoda Unique Characteristic (round worms)
only longitudinal muscles
Phylum Annelida Unique Characteristic (segmented worms- clades errantia and clitellata)
long, segmented body plan
Clade Errantia Unique Characteristic (marine annelida)
setae bundled on parapodium
Clade Clitellata Unqiue Characteristic (earthworms, leeches)
presence of clitellum (used for reproduction)
Phylum Arthropoda Unique Characteristic (subphylum chelicerata, crustacea, hexapoda, and myriapoda)
hard exoskeleton made of chitin
Subphylum Chelicerata Unique Characteristic (classes merostomata and arachnida)
lack of antennae
Subphylum Crustacea Unique Characteristic (classes copepoda, branchiopoda, malacostraca)
two pairs of appendages in front of mouth
Subphylum Hexapoda Unique Characteristic (class insecta)
consolidated thorax
Subphylum Myriapoda Unique Characteristic (classes chilopoda and diplopoda)
segmented trunk with multiple legs running down body
Class Merostamata Unique Characteristic (horseshoe crabs)
book gills for respiration
Class Arachnida Unique Characteristic (spiders, mites, ticks)
book lungs for respiration
Class Copepoda Unique Characteristic (small marine animal with oar feet and antennae)
biramous appendages
Class Branchiopoda Unique Characteristic (water fleas, sea monkeys, fairy shrimp)
gill feet
Class Malacostraca Unique Characteristic (lobsters, crabs, shrimps)
compound stalked or sessile eyes, three tagmata
Class Insecta Unique Characteristic (ants, flies, butterflies, beetles)
3 pairs of legs, all projecting from thorax
Class Chilopoda Unique Characteristic (centipedes)
1 pair of legs per body segment
Class Diplopoda Unique Characteristic (millipedes)
2 pairs of legs on most body segments
