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BIOL 205 > Taxonomy sheet 2 > Flashcards

Taxonomy sheet 2 Flashcards

1
Q

Phylum mollusca general characteristics

A
  1. Eucoelomate
  2. Bilateral symmetry
  3. Open or closed (in cephalopods) circulatory system
  4. Ctenidial gills
  5. Huge, diverse group - probably 3rd largest phylum
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2
Q

Eucoelomate

A

having a body cavity that is a coelom

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3
Q

acoelomate

A

an invertebrate lacking a coelom

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4
Q

pseudocoelomate

A

organism with body cavity that is not derived from the mesoderm

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5
Q

ctenidial gills (ctenidium)

A

respiratory organ or gills. that are found in mollusks

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6
Q

Phylum mollusca classes

A
  1. Class solenogastres and Caudocoveata
  2. Class scaphopoda
  3. Class polyplacophora
  4. Class gastropoda
  5. Class Bivalvia
  6. Class cephalopoda
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7
Q

Class solenogastres and caudofoveata

A
  1. They are worm-like

2. Have no shells

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8
Q

Class scaphopoda

A
  1. Tusk shells

2. Deposit feeders

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9
Q

deposit feeders

A

ingest particles associated with sediments

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10
Q

Class polyplacophora

A
  1. Chitons
  2. Shell - 8 plates (valves)
  3. Serially repetitious gills
  4. Open circulatory system
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11
Q

Class Gastropoda subclasses

A
  1. Subclass Prosobranchia
  2. Subclass Opisthobranchia
  3. Subclass pulmonata
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12
Q

Subclass Prosobranchia

A
  1. Marine snails

2. Gills in front (torsion)

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13
Q

Subclass Opisthobranchia

A
  1. Sea slugs

2. Gills in back (detorsion)

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14
Q

Subclass Pulmonata

A
  1. Lung or gill

2. Terrestrial or freshwater snails and slugs

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15
Q

Class bivalvia

A
  1. Two halves to shell
  2. Suspension feeders
  3. three chambered heart (open circulatory)
  4. Specialized for filter feeding
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16
Q

Class cephalopoda

A
  1. Squid, octopus, cuttlefish
  2. Closed circulatory
  3. Little or no shell (except chambered nautilus). -> if shell is present mainly used for buoyancy
17
Q

Class cephalopoda subclasses

A
  1. Subclass Nautiloidea
  2. Subclass ammonoidea
  3. Subclass coleodiea
18
Q

Phylum annelida general characteristics

A
  1. Closed circulatory
  2. Eucoelomate
  3. Gills or epithelial gas exchange
  4. Setae/chaetae.- chitinous bristles
  5. Proteinaceous cuticle
19
Q

Phylum annelida classes

A
  1. Class polychaeta
  2. APART OF CLITELLATA
    a) Class oligachaeta (paraphyletic)
    b) Hirudinea
20
Q

Class polychaeta

A
  1. Lots of setae
  2. Parapodia
  3. Gills or parapodia used for gas exchange
  4. Diverse
  5. Strong cephalization (prostomium, peristomium, eversible pharynx, jaws)
21
Q

Class oligachaeta (paraphyletic)

A
  1. Earthworms and others
  2. Mostly terrestrial, some aquatic
  3. No parapodia
  4. Few setae
  5. Deposit feeders
  6. epithelial gas exchange
  7. monoecious
22
Q

Class hirudinea

A
  1. Leeches - often ectoparasites
  2. Reduced or lost septa
  3. No setae or parapodia
  4. Anterior or posterior suckers
  5. Mostly freshwater, some marine, some terrestrial
23
Q

Phylum nemertea general characteristics

A
  1. Rhynchoceol - eversible proboscis often with venomous stylet
  2. Paired eyespots
  3. Derived “circulatory” system
24
Q

Phylum brachipoda general characteristics

A
  1. Bivalve
  2. Attached by pedicel
  3. Lophophore used for feeding and gas exchange
25
Q

Phylum entoprocta general characteristics

A
  1. Pseudocoelomate
  2. Ciliary feeding with tentacles
  3. Often protandrious hermpahrodites
26
Q

Phylum ectoprocta general characteristics

A
  1. Eucoelomate

2. Ciliary feeding with lophophore

27
Q

Phylum cycliophora general characteristics

A
  1. Acoleomate

2. Sexual and asexual stages

28
Q

Phylum Nemata general characteristics

A
  1. ECDYSOZOA
  2. Some parasitic but many free-living
  3. Second biggest phylum
  4. Eutely
  5. Collagenous cuticle
  6. Pseudocoelomate
  7. Only longitudinal muscles
29
Q

Eutely

A

Body made up of constant number of cells

30
Q

Phylum nematomorpha general characteristics

A
  1. ECDYSOZOA
  2. Some parasitic but many free-living
  3. Second biggest phylum
31
Q

Phylum Priapulida general characteristics

A
  1. ECDYSOZOA
  2. Caudal appendages
  3. Chitinous cuticle
  4. Special urogenital organs with solenocytes
32
Q

Caudal appendages

A

tail-like appendage that are thought to be remnants of the embryonic tail

33
Q

Solenocytes

A

Flagellated cells associated with excretion, osmoregulation and ionoregulation

34
Q

Phylum Kinorhyncha general characteristics

A
  1. ECDYSOZOA
  2. Scalids
  3. Pseudocoelomate
35
Q

Phylum Loricifera General characteristics

A
  1. ECDYSOZOA
  2. Deep ocean sediments
  3. Sessile
  4. Anaerobic
  5. Higgins larva
  6. Lorica covering abdomen
36
Q

Phylum Tardigrada general characteristics

A
  1. ECDYSOZOA
  2. Velvet worms
  3. Somewhat similar to arthropods
  4. Open circulatory
  5. Euceolmate

BIOL 205 (7 decks)

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