0
The Gastropods Phylum Mollusca
Class Gastropoda – “Stomach Foot”           -Extremely diverse           and numerous group           of animals          ...
Examples:• Whelk – can be large, predators• Conch – can be large, wind instruments• Periwinkle – very common snail in our ...
Anatomy• Most have a spiraling shell  surrounding a soft bodied  animal• Well defined head, ganglia,  no hearing• Excellen...
Habitat• Benthic  – Motile  – Epifauna –live on    seafloor  – Have adapted to    almost every    marine    environment in...
Feeding-Most are scavengersusing radula toscrape algae off rocksor decaying animalmatter from thebottom-Some are predators...
Some of            Feeding cont.predatorysnails feed bydrilling a holein anotherMolluskExamples:moonsnail, oysterdrill
Radula in Action
Bivalve Reproduction               -Separate sexes               -External               fertilization and               d...
Nudibranchs - Sea Slugs• Most brightly  colored to  ward off  predators• Many have  little  outgrowths  that are part  of ...
Snail Internal Anatomy
Upcoming SlideShare
Loading in...5
×

The gastropods old

116

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
116
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
5
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Transcript of "The gastropods old"

  1. 1. The Gastropods Phylum Mollusca
  2. 2. Class Gastropoda – “Stomach Foot” -Extremely diverse and numerous group of animals -Many are snails, but there are species without shells or without coiled shells
  3. 3. Examples:• Whelk – can be large, predators• Conch – can be large, wind instruments• Periwinkle – very common snail in our area• Nudibranchs – no external shell (interior one made of protein)• Limpets – not coiled like most snails; conical or relatively flat• Slipper Snail – can change from male to female• Abalone – used for jewelry
  4. 4. Anatomy• Most have a spiraling shell surrounding a soft bodied animal• Well defined head, ganglia, no hearing• Excellent sense of smell/taste• Gills to take oxygen from water• Trap door (operculum) to protect animal when withdrawn in its shell• Mantle secretes the shell• Bilateral symmetry
  5. 5. Habitat• Benthic – Motile – Epifauna –live on seafloor – Have adapted to almost every marine environment in the world (i.e., rocks, sand, mud, etc.)
  6. 6. Feeding-Most are scavengersusing radula toscrape algae off rocksor decaying animalmatter from thebottom-Some are predators Ex: cone snailhttp://www.youtube.com/watch?v=zcBmMPJrrKk
  7. 7. Some of Feeding cont.predatorysnails feed bydrilling a holein anotherMolluskExamples:moonsnail, oysterdrill
  8. 8. Radula in Action
  9. 9. Bivalve Reproduction -Separate sexes -External fertilization and development -Distinct egg cases
  10. 10. Nudibranchs - Sea Slugs• Most brightly colored to ward off predators• Many have little outgrowths that are part of their respiratory system
  11. 11. Snail Internal Anatomy
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×