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Marine Lab Exam
Marine Invertebrate names and identifying factors
21
Biology
Undergraduate 4
03/24/2014

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Term
P. Porifera
C. Demospongiae
Definition
Bread Sponge

Tree-like, hard body, Porous exterior, Branching body

Mass is hard, May contain spicules, Numerous openings
Term
P. Cnidaria
C. Scyphozoa
Definition
Jellyfish

Jelly-like, Disc-like, amorphous body, translucent, hair-like projections on edges, Radial Symmetry
Term
P. Cnidaria
C. Anthozoa
Subclass Octocorallia (Alcyonaria)
Definition
Octocoral

Tree-like, Branched structure, Porous surface, Attaches to hard, secure objects
Term
P. Cnidaria
C. Anthozoa
S.C. Hexacorallia (Zooantharia)
Definition
Hexacorals

Radial symmetry, mushroom like appendage, dark colored, several polyps on surface
Term
P. Arthropoda
S.P. Merostomata
Definition
Sea Scorpions

Extinct
Term
P. Arhtropoda
S.P. Crustacea
C. Cirripedia
Definition
Barnacle
Term
P. Arthropoda
S.P. Crustacea
C. Copepoda
Definition
Copepods

Anterior and posterior appendages, anterior appendages are antennae-esque, cylindrical body, lacks abdominal appendages
Term
P. Arthropoda
S.P. Crustacea
C. Malacostraca
O. Somatopoda
Definition
Mantis Shrimp

Jointed legs, Antennae,
Term
P. Arthropoda
S.P. Crustacea
C. malacostraca
O. Isopoda
Definition
Nudibranch

Segmented shell, segmented legs, antennae
Term
P. Arthropoda
S.P. Crustacea
C. malacostraca
O. Decapoda
Definition
Shrimp, lobsters, crabs

5 pairs of legs, compound eyes, segmented legs,
Term
P. Mollusca
C. Gastropoda
Definition
Whelk

Spiral shell
Term
P. Mollusca
C. Bivalvia
Definition
Surf Clam

Two shells, fleshy mass inside, hinged side, body largely enclosed within external shells/valves
Term
P. Mollusca
C. Cephalopoda
Definition
Atlantic Brief Squid

Cone-like head, tentacles, wing-like structure on both sides of head, not amorphous mass, not radially symmetric, not benthic, swims with tentacles, doesn't filter water by pumping
Term
P. Annelida
C. Polychaeta
O. Sedentaria
Definition
Tube Worm

Segmented body, appendages at anterior and posterior, parapodia present
Term
P. Annelida
C. Polychaeta
O. Errantia
Definition
Burrowing Worm

Segmented body, lots of legs on sides of body, bilateral symmetry, free living or burrowing
Term
P. Echinodermata
C. Echinoidea
Definition
Sea Urchin

Spherical body, covered in spines, mouth at center of body
Term
P. Echinodermata
C. Ophiuroidea
Definition
Brittle star

Long rays/arms, circular central body, mouth on underside of body
Term
P. Echinodermata
C. Asteroida
Definition
Sea Star

Central body, five arms/rays, mouth on underside of body
Term
P. Bryozoa
Definition
Bryozoans

Worm-like body, whitish grey color, small amount of branching, bethic
Term
P. Chordata
S.P. Urochordata (Tunicata)
C. Ascidiacea
Definition
Sea Grapes

Looks like mass of tubes, amorphous mass, gelatinous/leathery, no spicules
Term
P. Chaetognath
Definition
Arrow Worm

Round, worm-shaped body, Crown-like head thing with spikes, no buccal and atrial siphon, lateral fins and long setae for jaws
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