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CONGRATULATIONS
to the winners of the
TRILOBITE CONTEST!

If you submitted answers to me, thank you for your participation.

 The skillful and knowledgable winners of the prizes are listed
among the prize descriptions shown below.
Please scroll down to the contest questions to see the answers.

1st Prize
FRANK HABETS
Frank Habets (one of the cofounders of the Yahoo Trilobite Club) answered 19 of the 20 questions flawlessly. He will receive a printed and autographed hardcopy version of "Guide to the Orders of Trilobites." He is also eligible to receive the
Nice double Cedaria minor specimen
shown here
(scale in mm)

HOWEVER
Frank tells me that he doesn't need the specimen (I can only imagine how nice his Cedaria minor specimen looks!) and graciously makes it available for me to award to the 2nd place winner:

2nd Prize
John A. Spina, Jr.
John Spina, Jr. is the other cofounder of the Yahoo Trilobite Club! (is it really any surprise?) He got 18 of the 20 questions perfectly correct, and will also receive a printed and autographed hardcopy version of "Guide to the Orders of Trilobites" and will get the double Cedaria specimen that Frank waived (unless you have enough Cedaria specimens too, John!)

3rd Prize
Michael W. Kieron
Michael Kieron submitted answers that were also excellent, and actually matched the total correct points of the 2nd Prize winner. However, his submission was a few days later. He will receive a nice single Cedaria minor specimen, and I offer the hardcopy of the "Guide" to him also.


last revised 17 MAR 2000
©1999, 2000 by S. M. Gon III

TRILOBITE CONTEST ANSWERS
(you may click on the answers to be taken to the page that provides the information)

1.
What order of trilobites is marked by a cephalic ventral median suture?
ASAPHIDA

2.
What suborder of trilobites is marked by schizochroal eyes?
PHACOPINA

3.
What Superfamily often bears ventrally-directed thoracic spines?
ODONTOPLEUROIDEA

4.
Name a lateral coaptative structure and a genus that bears it.
VINCULAR FURROWS Phacops (many other genera acceptable)

5.
In what ontogenetic period do thoracic segments first appear?
MERASPID PERIOD

6.
What major trilobite predator was lacking in the Cambrian?
NAUTILOIDS, BONY FISHES (some other answers acceptable)

7.
Name three trilobite orders with natant hypostomes
Any of: PTYCHOPARIIDA, PROETIDA, PHACOPIDA, AGNOSTIDA

8.
From what order might Phacopida have arisen?
PTYCHOPARIIDA

9.
Name two orders often bearing proparian sutures.
PHACOPIDA, AGNOSTIDA

10.
Name a genus in the family Ignotogregatidae.
Ignotogregatus

11.
What Superfamily has the most thoracic segments?
EMUELLOIDEA

12.
Name all of the Geological Periods with trilobites.
CAMBRIAN, ORDOVICIAN, SILURIAN, DEVONIAN, CARBONIFEROUS, PERMIAN
(it was acceptable to divide Carboniferous into Pennsylvanian and Mississippian)

13.
What kind of hypostomes do Illaenina typically have?
IMPENDENT (CONTERMINANT)

14.
What suborder is typically gonatoparian?
CALYMENINA

15.
Name a trilobite genus that includes macropygous species.
Scutellum (other answers possible)

16.
What is distinctive about the eyes of Conocoryphe?
SECONDARILY LOST

17.
What is the earliest recorded Order of trilobites?
REDLICHIIDA

18.
Name a genus of trilobite in which limbs are preserved.
Triarthrus, Olenoides, Phacops, Agnostus (others acceptable)

19.
Name two distinguishing features of Condylopygoidea.
Any two of:
Anterior lobe of glabella broader than posterior lobe
Basal glabellar lobes form clear occipital structure
Pygidial anteroaxis triannulate

20.
What Superfamily of trilobites persisted to the Permian?
PROETOIDEA

I hope you enjoyed the challenge!
Please join me in congratulating the winners!

net/~smgon/condylopygoideaguide.htm">Pygidial anteroaxis triannulate

20.
What Superfamily of trilobites persisted to the Permian?
PROETOIDEA

I hope you enjoyed the challenge!
Please join me in congratulating the winners!