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67 Cards in this Set
- Front
- Back
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Class Polychaeta Examples
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Feather Duster, Serpulid worms, Clam worms
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Polychaete Habitat
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Mostly marine
Few freshwater or terrestrial |
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Polychaete Excretory System
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Protonephridia, metanephridia
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Nereis
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Polychaete Genus
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Diopatra
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Polychaete Genus
Cements pieces of shell to the end of its parchment tube. |
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Aphrodita
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Polychaete Genus
"Sea mouse" |
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Arenicola
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Polychaete Genus
Burrowers |
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Polychaete digestive system
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coiled, lateral branches
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Polychaete respiration
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Gills are most common.
Located on flattened lobe of nodopodium. |
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Polychaete circulatory system
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Closed.
Vascularized gills, nephridia, parapodia. |
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Polychaete nervous system
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well-developed brain, ventral nerve cord.
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Polychaete senses
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Chemo-receptors concentrated in nucal organ.
Tactile receptors track changes in water pressure. 2-6 camera-type eyes w/ crude images. |
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Polychaetes repeat these each segment:
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nerves, muscles, nephridia
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Class Oligochaeta example
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Earthworms
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Oligochaeta habitat
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Terrestrial & freshwater.
Few marine. |
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Class of worm with ill-defined head region
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Oligochaeta
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Class Hirudinea example
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Leaches
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Annelid that lacks setea
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Hirudinea
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Hirudinea habitat
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Mostly freshwater
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Hirudinea feeding
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Originally raptoral. Secondary evolution as blood-suckers of vertebrates.
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Arthropoda layers
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Cement layer
Hydrophobic waxy layer Exocuticle Endocuticle |
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Main component of terrestrial arthropods' exoskeleton
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Chitin
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Main component of crustacean exoskeleton
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Calcium carbonate
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Arthropoda embryonic development
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Protostome w/ true coelom
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Arthropoda coelom
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True.
Reduced & replaced by hemocoel! |
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Aquatic Arthropod respiration
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Gills
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Terrestrial Arthropod respiration
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Most have modified plate-like structures derived from gills. Often have protective plate over them.
Some have tracheal system |
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Arthropod nervous system
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Brain can be divided into sub-ganglionic groups.
Much more complex than molluscs or annelids. |
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Arthropod reproduction
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Diecious.
Terrestrial arth. have internal fertilization |
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Chelicerata body regions
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Cephalothorax/ prosoma
Abdomen/ opisthosoma |
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Pedipalps
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2nd appendage on prosoma of Chelicerata
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Merostomata
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Aquatic Chelicerata class
Evolved from Trilobites |
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Eurypterida
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Merostomata subclass.
"Sea scorpions" |
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Eurypterida habitat
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1st marine, then adapted to brackish & fresh water
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Eurypterida body/form
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Up to 10ft long
Elongated telson 5 pair of walking legs compound lateral & medial eyes Segmented Carapace |
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Eurypterida respiration
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6 pair of gills
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Xiphosura
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Merostomata subclass
"Horseshoe crabs" |
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Genus Limulus
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most prevalent Xiphosura
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Xiphosura locations
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Along the Atlantic coast in both North America & South America.
Maine- mid Florida & 2/3 way down Mexico - South America Seasonal migrations |
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Xiphosura reproduction
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Come inshore seasonally to lay eggs 1-3in deep in the foreshore
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Xiphosura opisthosoma
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Ventral segmentation visible.
forward area covered by dorsal plate. The flattened margin of carapace on ventral side gives the crabs their name. |
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Xiphosura respiration
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2-5 modified book gills
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Xiphosura feeding
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Opportunistic scavengers
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Chelicerate evolution
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Trilobite---> Eurypterida---> scorpions---> other arachnids
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Arachnida habitat
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terrestrial
few freshwater (NO GILLS) |
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Coxal gland
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gland found internally in base segment of arachnid walking legs. Serves as kidney (produces fluid urine)
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Arachnida feeding
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predatory/ carnivores
Red Spider Mites are exception |
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Arachnida respiration types
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Book lungs
Trachea system both none (tiny mites) |
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Arachnida circulatory system
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Heart located dorsally in rear part of opisthosoma
Mites don't have any |
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Arachnida reproduction
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diecious
internal fertilization |
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Rhizochephala
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"Naked barnacles"
Internal parasites of other crustaceans; halts development of host. |
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Malacostraca Subclasses
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Phyllocarida
Hoplocarida Eumalacostraca |
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Order Stomatopoda
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Mantis Shrimp
Raptoral (part of Hoplocarida) |
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Eumalacostraca Superorders
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Syncarida
Pancarida Eucarida Peracarida |
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Pancarida
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Minute
Inhabit hotsprings (Tx, West Indies, Mediterranean) |
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Eucarida
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Thoracic segments of carapace fused
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Euphausiacea
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Krill
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Superorder Peracarida
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Brood eggs
1st thoracic segment fused with head |
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Order Amphipoda
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"Beach fleas"
LATERALLY COMPRESSED peracaridans Sessile compound eyes No carapace |
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Order Isopoda
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Diecious
Brood eggs No carapace |
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Lower, segmented classes of Crustacea
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Remipedia
Cephalocarida Mystacocarida Tantulocarida |
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Tadpole Shrimp
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Class Branchiopoda
Order Notostraca Sand from arid areas |
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Class Branchiopoda Habitat
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freshwater
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Order Anostraca
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Best ability to osmoregulate
Fairy Shrimp, Artemia |
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Class Ostracoda
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hinged bivalve carapace
Reduced trunk w/ 2- appendages muscle/seed shrimp |
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Class Copepoda
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Mostly marine, some freshwater
fish lice- many parasitic Naupliar eye |
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Branchiura
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Ectoparasitic on marine & freshwater fish
2 suckers for attachment- highly specialized |
