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Eemb 136L Quiz 3 > Lab 7 > Flashcards

Lab 7 Flashcards

0
Q

How many Molluscs?

A

~90,000 species

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1
Q

Age of Molluscs?

A

Cambrian - Present

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2
Q

What clade?

A

Part of the bilateria and the clade Lophotrochozoa

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3
Q

Sister groups?

A

Bryozoa
Brachiopoda
Annelida

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4
Q

Mantle

A

Dorsal body wall covering visceral mass

Mantle Cavity is passageway for incoming currents

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5
Q

Foot

A

Most have it, used for balance.

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6
Q

Gastropoda foot

A

Mucus secretion

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7
Q

Chitons foot

A

Suction

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8
Q

Bivalve foot

A

Burrowing

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9
Q

Cephalopod foot

A

Propulsion and tentacles

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10
Q

Radula

A

Tongue like, used for eating

Bivalves don’t have one

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11
Q

Shell

A

Can be singular, bivalve, multi valved, or absent

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12
Q

Solenogastres and Caudofoveata

A 
Lack shells
Age is recent
They have sclerites
Superficially worm like
These are known together as the Aplacophorans
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13
Q

Polyplacophora

A

Age: Cambrian-recent
These are the chitons
8 bilaterally symmetrical valved surround muscular girdle
Intertidal algae eaters
Stem group is multiplplacophorans- 17, not 8

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14
Q

Monoplacophora

A

Age: Cambrian - recent
Single, cap like conical valve
Deep sea
Many are in a diff. Group called Helionelloida, extinct in Ordovician

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15
Q

Scaphopoda

A

Age: Ordovician - recent
Posses a univalved shell closed dorsally and ventrally and open both anteriorly ( large end ) and posteriorly ( narrow end )
Posterior apical opening protrudes above substrate to ventilate the mantle cavity

16
Q

Rostroconcha

A

Age: Cambrian-Permian
Shell- right and left symmetric
“Upside down taco shell”
Pegma- bridge of carbonate that links two valves

17
Q

Cephalopoda

A

Age: Canbrian - Recent
Squids, nautilus, octopus
Extinct- ammonites and belemnites

18
Q

Shell of cephalopod

A 
Straight- orthoconic
Curved- cyrtoconic
Coiled- planispirally
These ones are chambered
Septa separate the chambers 
Siphuncle connects all chambers
Septum meets wall at Suture
19
Q

Cephalopod siphon

A

Force water through it to swim

20
Q

Nautilida

A

Devonian - now
Planispirally coiled external shell
Septa are concave towards aperture

21
Q

Orthocerida

A

Ordovician - Cretaceous

Like Nautilida, but orthoconic shell

22
Q

Anmonoidea

A 
Devonian - Cretaceous
Planispirally shell
More related to octopus and such
External ribbing
Found all over the sea
23
Q

Coleoida

A

Devonian - recent
Shell is absent or interior
Belemnites have shell with a guard - only part preserved in this extinct group
Octopus and squid

Eemb 136L Quiz 3 (3 decks)

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