Meroplankton Part II

Meroplankton Part II

Classification

Phylum Porifera (sponges)

Phylum Cnideria

Class Hydrozoa (hydroids, Portuguese-Man-Of-War)

Class Scyphozoa (jellyfish)

Class Cubozoa (box jellies and sea wasp)

Class Anthozoa (corals and sea anemones)

Phylum Platyhelminthes

Class Turbellaria (flat worms)

Phylum Mollusca

Class Cephalopoda (octopus, squids, cuttlefish, and nautilus)

Class Bivalvia (clams, oysters, scallops, and mussels.)

Class Gastropoda (sea snails, nudibranches)

Class Polyplacophora (chitons)

Phylum Annelida

Class Polychaeta (marine worms and fan worms)

Phylum Arthropoda

Class Crustacea

Subclass Malacastroca

Order Decapoda (crab and lobster)

Phylum Echinodermata

Class Astroidea (sea stars)

Class Ophiuroidea (brittle stars)

Class Holothuridea (sea cucumbers)

Class Echinoidea (sea urchins)

Class Crinoidea (crinoids)

Phylum Chordata

Subphylum Urochordata (tunicates)

Subphylum Vertebrata

Class Agnatha (jawless fish)

·  Hagfish- no larval stage

·  Lamprey- ammocetes larvae, not in Hawaii

Class Actinopterygii (Osteichthyes (boney fish))

Guess whom the following grew up to be:

A. B. C. D.

Answer

A.  dolphin

B.  fish

C.  cat

D.  human

Sometimes animals of similar groupings look very similar during embryonic development. All of the above animals are from the Phylum Chordata and are relatively closely related. However, different species of distant groups may go through different developmental stages. See how well you do matching the following animals to their larval form.
MATCHING: match the larvae or juvenile stage to the adult

Animal / larvae / adult
1. / brittle star
2. / Spanish dancer (nudibranch)
3. / lobe coral
4. / tunicate
5. /
sponge
6. / squid
7. / snowflake moray
8. / seven eleven crab
9. / leaf scorpionfish
10. / crown of thorns starfish
11. /
peacock flounder
12. / pom pom crab
13. / marine fire worm
14. /
giant clam
15. / blue tang
16. / divided flat worm
17. / octopus
18. / ocean sunfish
19. / triggerfish
20. /
seahorse
21. / slipper lobster
22. / cowfish

ANSWERS

Animal / larvae / adult
1. Porifera (parenchymella larvae) / sponge
2. Cnideria (planula larvae) / lobe coral
3. Flatworm
(Müllers larvae) / divided flat worm
4. Mollusca and Polychaeta
(trochophore larvae-after hatching) /
giant clam
5. Mollusca (veliger larvae-later stage) / Spanish dancer (nudibranch)
6. Mollusca- Squid / squid
7. Mollusca- octopus / octopus
8. polychaete / marine fire worm
9. crab (zoea; early crab stage) / seven eleven crab
10. Crab (megalopa; final planktonic stage) / pom pom crab
11. lobster (phyllosoma) / slipper lobster
12.Starfish
(bipinnaria larvae) / crown of thorns starfish
13. Brittle star
(Ophiopluteus larva) / brittle star
14. tunicate / tunicate
15. seahorse / seahorse
16. triggerfish / triggerfish
17. Eel (leptocephalus) / snowflake moray
18. cowfish / cowfish
19. Leaf scorpion fish / leaf scorpionfish
20. Blue tang / blue tang
21. flounder / peacock flounder
22.
Ocean sunfish / ocean sunfish

Meroplankton II Larvae

1. / 2. / 3. / 4.
5. / 6. / 7. / 8.
9. / 10. / 11.
/ 12.
13. / 14. / 15.
/ 16.
18. / 19. / 20.
21.
/ 22.

Meroplankton II ADULT

marine fire worm / pom pom crab / squid / Seahorse
Sponge / Giant clam / blue tang / cowfish
octopus / lobe coral / Triggerfish / leaf scorpionfish
crown of thorns starfish / tunicate / Mola mola (ocean sunfish) / Peacock flounder
Snowflake moray / Seven eleven crab / slipper lobster / brittle star
Divided flatworm / Spanish dancer (nudibranch)