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Definition
"Peanut worms" Found buried in rock/sediments Soft body, sometimes have a shell Introvert connects the tenticles to the trunk, and is retractable U-shaped disgestive system, anus near mouth, close to edge of benthos |
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Small worm Tentacles at one end, anchor to tube at other No digestive system Found in deep vent communities, can be large and red (hemoglobin) Absorbs nutrients, or symbiosis with bacteria |
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Definition
Beige colored, somewhat rare, several inches long Proboscis is unretractable, like a rolled tongue Lays proboscis out, and scilia brings in organic material that comes into contact |
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Definition
Smallest of metazoa, looks like tiny scaled bears Herbivorous, right stylets puncture cell walls, mouthp placed near, pharynx sucks out cytoplasm. Can form cysts |
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Definition
Phylums that share a lophophore, food gathering structure. Includes Phoronida, Byrozoa, Brachiopoda, Entoprocta |
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Definition
Lophophore looks like a coiled horseshoe with tentacles Mouth in middle, U digestion small, lives in sediments |
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Definition
Very common in coastal environments Live in colonies, can attach to piers, etc Looks almost like plants Tentacles pull down food, passes food down and shares with others in colony Some individuals are assigned to reproduction, feeding, etc Later step of "fowling communities", after bacteria and barnacle buildup |
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Definition
Two values, different from molluscs, b/c valves are different, dorsalHave to open to feed, uses lophophore to feed, adductor muscles to open Lophophore contains most of valve space |
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Definition
Benthic, have an attachment disc U shaped digestion |
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Definition
"Arrow worms" plankton Benthic members are more robust, move in interstitial spaces Can be pelagic, transparent Structured as a long tube, two sets of lateral fins Aggregation of nervous ganglier material near ventral surface Head region contains grasping spines teeth, sensory pits Little hairs all over body, every species has different placement Used to sense pressure waves, different species sense different frequencies, go after different prey |
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Term
Echinodermata, Stelleroida |
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Definition
Phylum, class Derived radial symmtetry Exclusively marine Internal skeleton composed of calcium carbonate plates Water vascular system, like internal hydraulics None are parasitic, found in all marine environments |
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Term
Enchinodermata, Asteroida |
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Definition
Subclass, sea stars Central disc, 5 soft arms (connected), oral surface faces down Osicles (internal skeleton) embedded in outer tissue Tube feet connected to canal system, suction powered by "hydraulics", attaches to shells, rocks, etc Two stomachs, one can be exuded out of mouth, begin digesting things like bivalves Regenerative, can survive as long as severed arm contains part of central disc |
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Term
Echinodermata, Ophiuruidea |
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Definition
(sub class) "Brittle stars" Lots of space between arms on central disc Stomach does not exit, uses teeth to devour food brought in with arms Ossicles are now in the middle of arms, (wooden snake ex) Uses arms to wave around, crawl Has tube feet, more round and not used for feeding |
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Term
Echinodermata, Echinoidea |
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Definition
(class), urchins, etc Ossicles are like skull plates, fused together into a sphere Spines and podia protrude Oral and aboral surfaces |
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Term
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Definition
Black spiny sea urchin (Echinoidea class) Mucusy epidermis covers layer over all of spines, can be left in your skin Jaws on oral surface, 5 arrow shaped teeth that extend upwards - "Aristotle's Lantern" |
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Part of Echinodermata, Echinoidea Compressed urchins Podia etc, uses them to bury self in sediment through holes in skeleton |
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Echinodermata, Holothuroidea |
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Definition
Sea cucumbers Live on benthos, or in sediments Surface on bottom has highest concentration of tubefeet/podia, called sole Crown of tentacles at one end Ossicles are nearly absent, Wave tentacles in sediment or water column, food sticks to it, wipes it off and consumes in mucus gland |
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Definition
(class) most primitive, used to dominate Well defined ossicles, Feathery area attached to main body Suspension feeders |
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Term
Chardata, Urchardata, Ascidiacea |
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Definition
(class) sea squirts Can be relatively transparent In-current pore, ex-current pore, sued for filter feeding "Turicates" Basket inside filters out water, endostyle secretes mucus, which spreads out around basket, transports everything into digestive system Larval form , almost like a tadpole, pelagic Find a place on benthos to attach, metamorphose into a benthic adult |
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Term
Chordata, Urchardata, Thaliacea |
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Definition
(class) salps Entirely pelagic, found in open ocean Barrel-like form, water flows through cylinder Contains endostyle that creates mucus web, funnels particles into mouth, constantly consuming Attach together to form salp chains So good at capturing small particles, most live in clearer non coastal water Alternation of generation, stick together with asexually reproduced organisms to form chains Other organisms live on salp chains (fish, etc) |
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Chordata, Urchardata, Larvacea |
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Definition
(class) Secretes gelatinous house Pelagic, open ocean, filtering Two channels for water to move through Moves tail in house to move current Filters out large particles, smaller particles are led to smaller filer so it can eat When large filter (grid) is clogged, animal flicks its tail and loses its house, secretes new one |
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