Fossils B/C

[UTF-8 U+6211 U+662F]

Since no one is asking any question I will ask some questions.

1. Identify this:


2. Label this: (a and b)



3. What is its temperal range?

4. It is anatomically intermediate between _________________ and those that were fully capable of coming onto land.

Can number 2 be part of the test? I think so right?

Yes, number 2 is allowed.

[wec01]

Since no one is asking any question I will ask some questions.

1. Identify this:


2. Label this: (a and b)



3. What is its temperal range?

4. It is anatomically intermediate between _________________ and those that were fully capable of coming onto land.

Can number 2 be part of the test? I think so right?

Answers (Click to Show Hidden Text)

1. Acanthostega
2. (Had to look this up) a: bones supporting gills; b: tetrapod limb
3. Late Devonian
4. Lobe-finned fish or early tetrapods?

[AwersomeUser]

Since no one is asking any question I will ask some questions.

1. Identify this:


2. Label this: (a and b)



3. What is its temperal range?

4. It is anatomically intermediate between _________________ and those that were fully capable of coming onto land.

Can number 2 be part of the test? I think so right?

Answers (Click to Show Hidden Text)

1. Acanthostega
2. (Had to look this up) a: bones supporting gills; b: tetrapod limb
3. Late Devonian
4. Lobe-finned fish or early tetrapods?

Correct Answers (Click to Show Hidden Text)

1. :)
2. :)
3. :)
4. It’s Lobe-finned fish

[wec01]

Give the Lagerstätten (from the rules) in which each of the following are found:
1. Cryptolithus
2. Ginkgo
3. Elrathia
4. Coelophysis
5. Archaeopteryx
6. Lepidodendron

Some specimens that aren't on the list so probably aren't be legal but ¯\_(ツ)_/¯; answer if you want:
7. Confuciusornis
8. Anomalocaris
9. Tullimonstrum
10. Knightia

[dchen22]

Answers (Click to Show Hidden Text)

1. Beecher’s Trilobite Bed
2. Yixian Formation ??
3. Burgess Shale
4. Ghost Ranch
5. Solhnofen
6. Mason Creek
7. Yixian Formation
8. Burgess Shale
9. Mason Creek
10. Green River Formation

Some of the “illegal” questions were actually on the MIT Test as bonus questions.

[wec01]

Answers (Click to Show Hidden Text)

1. Beecher’s Trilobite Bed
2. Yixian Formation ??
3. Burgess Shale
4. Ghost Ranch
5. Solhnofen
6. Mason Creek
7. Yixian Formation
8. Burgess Shale
9. Mason Creek
10. Green River Formation

Some of the “illegal” questions were actually on the MIT Test as bonus questions.

Yup, your turn

[dchen22]

A.

B.


1. Identify specimens A and B.
2. What is an ambulacrum?
3. What is a pedicellaria?
4. List 5 differences between the taxa of specimens A and B.

[wec01]

A.

B.


1. Identify specimens A and B.
2. What is an ambulacrum?
3. What is a pedicellaria?
4. List 5 differences between the taxa of specimens A and B.

Answers (Click to Show Hidden Text)

1. A: Asteroidea; B: Ophiuroidea
2. Ossicles which line the arms of the starfish and brittle star
3. Pincer/forcep-like structures which shut when touched
4. B has a covered ambulacral groove; The central disc is delineated from the arms in B; B's podium are reduced to tactile sensors; B moves by wiggling its arms (as opposed to using tube feet); The central disc in B is nearly circular

[dchen22]

Correct, your turn!

Additional Notes (Click to Show Hidden Text)

2. For general echinoderms, ambulacra are ossicle columns/sections of the echinoderm associated with food intake.
3. I would add that pedicellariae are modified spines.
4. Other differences include B doesn’t have ampullae, B doesn’t have a separate anus, and B is mostly deep water while A is mostly found in the littoral zone.

[wec01]

List one specimen from the list that went extinct during each of the 5 major mass extinctions.