bio 1501 week 9 lophotrochozoa ecdysozoa

describe clade lophotrochozoa

Bilateral symmetry, triploblastic, coelomate; Lophophore feeding structure or trochophore larval stage

describe phylum platyhelminthes

Bilateral symmetry and cephalization (heads), triploblastic, acoelomate, 3 classes

what are the 3 classes included in phylum platyhelminthes?

turbellaria, trematoda, cestoidea

what is the difference between the free-living and parasitic members of phylum platyhelminthes?

parasitic organisms don’t invest heavily on digestive structures, focus on reproduction

what are class turbellaria?

planarians, free living organisms

describe the body plan of class turbellaria

Bilateral symmetry, triploblastic, acoelomate

how do turbellarians feed?

protrusable pharynx

how do turbellarians digest?

incomplete (gastrovascular cavity)

how do turbellarians reproduce?

sexual or asexual (regrow body parts)

what are class trematoda?

flukes

what class are flukes a part of?

trematoda

describe the body plan of class trematoda

bilateral symmetry, triploblastic, aceolomate

how do trematodes feed?

parasitic

how do trematodes digest?

incomplete; gastrovascular cavity; reduced system

how do trematodes reproduce?

hermaphroditic (dominant structures)

what are class cestoidea?

tapeworms

what class are tapeworms part of?

cestoidea

describe tapeworms body plan

Bilateral symmetry, triploblastic; Scolex with hooks and suckers, proglottids

describe feeding and digestion of tapeworms

parasitic

describe reproduction of tapeworms

hermaphroditic, can self-fertilize

describe phylum mollusca

Coelomate, triploblastic, bilateral symmetry

what are part of phylum mollusca?

snails, clams, oysters, squid, nautili, etc

describe phylum mollusca anatomy

Molluscs have common anatomy and use the same structures in different ways on different organisms; Mantle, gill, foot, shell

what are a part of class bivalvia?

clams, oysters

describe class bivalvia

Open circulatory system uses hemolymph, 3- chambered heart

describe class bivalvia digestion

complete

describe class bivalvia external anatomy

valves (shell), foot sometimes

describe class bivalvia internal anatomy

Mantle, visceral mass, foot, palps, mouth, gills/ctenidia, pallial line, muscle scars, umbo, hinge

what are part of class cephalopoda?

squid, octopi, nautili, etc

describe class cephalopoda

Predators with cephalization, separate sexes, closed circulatory system, 3-chambered heart

describe class cephalopoda external anatomy

Collar, fins, tentacles (2), arms (8),eyes, mantle with chromatophores, mouth with beak, siphon

describe class cephalopoda internal anatomy

Inc sac, gills/ctenidia, pen, caecum, branchial and systemic hearts; Female: Nidamental glands, ovary; Male: Testis, penis

what are phylum annelida?

segmented worms

what phylum are segmented worms?

annelida

describe phylum annelida

Coelomate, Bilateral Symmetry, Triploblastic, Segmented (except leeches), two classes

what are the 2 classes included in phylum annelida?

polychaeta (marine worms) and clitellata (including earthworms and leeches)

what are class polychaeta?

marine worms

what class are marine worms?

polychaeta

what are clitellata?

earthworms and leeches

what class are earthworms and leeches?

clitellata

describe the digestion of earthworms

complete

describe the waste removal of earthworms

nephridia, intestine

describe the circulation of earthworms

closed system

describe reproduction of earthworms

hermaphroditic, sexual reproduction, clitellum

describe how earthworms live

free-living, terrestrial

what is ecdysis?

the process of shedding an outer covering (cuticle)

what are phylum nematoda?

roundworms

what phylum are roundworms?

nematoda

describe the body plan of nematodes

bilateral symmetry, pseudoceolom

describe digestion of nematodes

complete

describe reproduction of nematodes

sexual; separate sexes usually

describe feeding of nematodes

parasitic (some types free-living)

where do nematodes live?

important organisms in soils

what do nematodes shed?

ecdysis of collagen cuticle

what are phylum arthropoda?

crabs, crayfish, insects

what are arthropods exoskeleton made of?

chitin

what are the segments of arthropods?

head, thorax, abdomen (may fuse into cephalothorax and abdomen)

what does cephalothorax mean?

head and thorax are connected

describe arthropods

complete digestion, open circulatory system, respiratory structures often adapted for land

what are the 3 subphylas of arthropods?

chelicerata (horseshoe crabs), crustacea (crayfish), hexapoda (insects)

what is subphylum chelicerata?

horseshoe crabs, spiders, ticks, etc

what subphylum are horseshoe crabs, spiders, ticks, etc?

chelicerata

what are subphylum crustacea?

crayfish, barncacles, daphnia

what subphylum are crayfish?

crustacea

what are subphylum hexapoda?

insects

what subphylum are insects?

hexapoda

what are the external anatomy of horseshoe crabs?

Carapace, telson, chelae, chelicerae, gnathobase, book gills, anus

describe the external anatomy of crustacea

Cephalothorax and abdomen, carapace, telson, uropods, chela, swimmerets (male vs. female), rostrum, antennae, walking legs

describe the external anatomy of hexapoda

Head, thorax, and abdomen; 6 legs, usually 4 wings; hind/forewing, femur, ovipositor, antennae, spiracles

describe the adaptations for land for hexapoda

Spiracles with tracheae for respiration; Sensory structures: eyes, antennae, tympanum

what is the form of respiration for chelicerata?

book gills

what is the form of respiration for crustacea?

gills

what is the form of respiration for hexapoda?

spiracle leads to trachea

describe reproduction adaptations to live in specific habitats

hermaphroditic to enable reproduction with any other organism; separate sexes to partition responsibilities between mates

describe digestion adaptations to live in specific habitats

extracting nutrients through long intestinal tracts of gastrovascular cavities

describe support and locomotion adaptations to live in specific habitats

appendages, body coverings, etc. or staying in one place

describe respiration adaptations to live in specific habitats

gills, lungs, trachea; differ between water or land based ecosystems

planarians

planarians

trematoda

cestoidea (tapeworms)

mollusk general anatomy

bivalia anatomy

bivalia anatomy

cephalopoda anatomy

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clitellata (earthworm) anatomy

earthworm internal anatomy

roundworm (nematoda)

male nematoda

female nematoda

chelicerata (horseshoe crab) external anatomy

crustacea (crayfish) external anatomy

crustacea (crayfish) external anatomy

hexapoda (grasshopper) external anatomy

book gills

book gills

crustacea (crayfish) gills