Question

The facial suture of trilobites running through the genal angle is known as

• A. proparian
• B. marginal
• C. gonatoparian
• D. opisthoparian

Hint:

Trilobite sutures are important for classification, with the gonatoparian suture being a key feature in identifying certain species.

Answer 1

The Correct Option is C

Step 1: Understanding the question.
The question refers to the facial suture of trilobites, specifically the one running through the genal angle. This suture type is a key identifier in trilobite morphology.
Step 2: Analyzing the options.
(A) proparian: This refers to a suture located anteriorly, not in the genal angle.
(B) marginal: This suture runs along the margin, not through the genal angle.
(C) gonatoparian: Correct — The gonatoparian suture runs through the genal angle of the trilobite.
(D) opisthoparian: This suture runs posteriorly, not through the genal angle.
Step 3: Conclusion.
The correct answer is (C) gonatoparian, as this suture runs through the genal angle of the trilobite.