Assignment: Platyrrhini And Catarrhini

Want create site? With you can do it easy.

Assignment: Platyrrhini And Catarrhini

Assignment: Platyrrhini And Catarrhini


Don't use plagiarized sources. Get Your Custom Essay on
Assignment: Platyrrhini And Catarrhini
Just from $13/Page
Order Essay

Station 1: What defines a primate? (0.6 pt.)

A college happened upon a mystery skull while looking through a mammalian skeletal collection. She thinks it may be a primate and comes to you for your expert opinion. She cannot mail you the skull so she emails youaeveral photos. Examine the photos below. Use the list of primate features (found in the lab reading for this week) to help you make the distinctions. Assignment: Platyrrhini And Catarrhini


Station 2: Dentition (2 pts.) Different primate clades can be identified by their dental formulae. Primates have 2 incisors, and 2-3 premolars (except the aye-aye, which has a very unusual dentition). Most other mammals have either more or fewer teeth. For the following questions, first determine the dental formula, then consider the cusp pattern.

! !

!   !

1. Write the dental formula for each of the craniums or mandibles provided:






2. Answer the following questions using the above dental formulae and the written/illustrated materials provided:

a) Which specimen is not a primate? How do you know?

b) Which specimen is a New World monkey? How do you know?

c) Does specimen “E” have the bilophodont or Y-5 molar cusp pattern? Based on this cusp morphology and its dental formula, what primate group does this specimen belong to?

d) Which mandible is human? What traits did you use to make your identification?

e) Which specimens are apes? How do you know? (Hint: you are an ape)

Station 3: Strepsirrhini and Haplorhini (2 pts.)

Using the handouts, images, and websites, complete the following table illustrating some of the important morphological differences between each primate group.

Strepsirrhine:  Haplorrhine:

with primitive primates in a grade called “Prosimia.” They are now grouped with monkeys and apes in a

Examine the tarsier skull ( and study the table. Tarsiers can be placed in the prosimian grade or in the haplorhine clade. Name one primitive, prosimian feature that tarsiers retain and one derived, haplorhine feature that they possess. Add which of these features is a synapomorphy, and which is a symplesiomorphy.

Prosimian feature:         Haplorhine feature:


2) Does the mystery skull at this station belong to a strepsirrhine or a haplorhine primate? List at least one trait which helped you determine this.



Station 4: Platyrrhini and Catarrhini (1.6 pts.)

The Haplorhine suborder is divided into two infraorders: Anthropoidea (Monkeys and Apes) and Tarsiiformes (tarsiers). Anthropoidea is further divided into two parvorders: Platyrrhini and Catarrhini. Platyrrhines are native to Central and South America (the ‘New World’) and Catarrhines are native to Africa, Europe, and Asia (the ‘Old World’).

Platyrrhine:  Catarrhine:

1) Based on what you’ve learned so far, identify what group the following “mystery primate” skulls belong to. To receive credit, list the character(s) you used to make your identification.



A) Is “A” a platyrrhine or catarrhine? How do you know?

B) Is “B” a platyrrhine or catarrhine? How do you know?

2) What advantages might there be to having a prehensile tail for an arboreal primate?

Station 5: Cercopithecoidea and Hominoidea (1.8 pts.)

Within Catarrhini are the two superfamilies Cercopithecoidea (Old World monkeys) and Hominoidea (apes). Use the table below to describe the features of each in relation to the other.

Cercopithecoid: Hominoid:

1) Which two traits in the above table would be the most useful for determining if an animal was a cercopithecoid or a hominoid in the fossil record? Hint: think about discrete (traits which are either present or absent) vs. continuous traits.

2) List one human autapomorphy – a trait that humans have to the exclusion of all the other primates. Hint:

think about what makes humans unique within the order Primates.

Exercise 2: Systematics and Primate Phylogeny (2 pts.)

Below is a hypothetical phylogeny for six different taxa (A–F). In the phylogeny, the appearance of a new character is represented as a number in a circle. For instance, Character 3 evolved sometime after the common ancestor of Taxa D, E, and F diverged from the common ancestor these taxa share with Taxon C. Character 3 would therefore be a shared, derived trait, or synapomorphy of taxa D, E, and F.


A) Which character is a synapomorphy of E and F?

B) Is Character 1 a synapomorphy or a symplesiomorphy for taxa C and D?

C) Is Character 1 useful for reconstructing the relationship between C and D? Why or why not?

D) Of the 5 characters listed, which represents an autapomorphy?

Study the primate phylogeny in your textbook and fill in the blanks below. Be mindful of spelling: some names are very similar, but have different meanings!  If you are having difficulty filling out the phylogeny, you may print out the last page, neatly handwrite the answers in the blanks, and paste a picture of the phylogeny back into the document.

Did you find apk for android? You can find new and apps.

What Will You Get?

We provide professional writing services to help you score straight A’s by submitting custom written assignments that mirror your guidelines.

Premium Quality

Get result-oriented writing and never worry about grades anymore. We follow the highest quality standards to make sure that you get perfect assignments.

Experienced Writers

Our writers have experience in dealing with papers of every educational level. You can surely rely on the expertise of our qualified professionals.

On-Time Delivery

Your deadline is our threshold for success and we take it very seriously. We make sure you receive your papers before your predefined time.

24/7 Customer Support

Someone from our customer support team is always here to respond to your questions. So, hit us up if you have got any ambiguity or concern.

Complete Confidentiality

Sit back and relax while we help you out with writing your papers. We have an ultimate policy for keeping your personal and order-related details a secret.

Authentic Sources

We assure you that your document will be thoroughly checked for plagiarism and grammatical errors as we use highly authentic and licit sources.

Moneyback Guarantee

Still reluctant about placing an order? Our 100% Moneyback Guarantee backs you up on rare occasions where you aren’t satisfied with the writing.

Order Tracking

You don’t have to wait for an update for hours; you can track the progress of your order any time you want. We share the status after each step.


Areas of Expertise

Although you can leverage our expertise for any writing task, we have a knack for creating flawless papers for the following document types.

Areas of Expertise

Although you can leverage our expertise for any writing task, we have a knack for creating flawless papers for the following document types.


Trusted Partner of 9650+ Students for Writing

From brainstorming your paper's outline to perfecting its grammar, we perform every step carefully to make your paper worthy of A grade.

Preferred Writer

Hire your preferred writer anytime. Simply specify if you want your preferred expert to write your paper and we’ll make that happen.

Grammar Check Report

Get an elaborate and authentic grammar check report with your work to have the grammar goodness sealed in your document.

One Page Summary

You can purchase this feature if you want our writers to sum up your paper in the form of a concise and well-articulated summary.

Plagiarism Report

You don’t have to worry about plagiarism anymore. Get a plagiarism report to certify the uniqueness of your work.

Free Features $66FREE

  • Most Qualified Writer $10FREE
  • Plagiarism Scan Report $10FREE
  • Unlimited Revisions $08FREE
  • Paper Formatting $05FREE
  • Cover Page $05FREE
  • Referencing & Bibliography $10FREE
  • Dedicated User Area $08FREE
  • 24/7 Order Tracking $05FREE
  • Periodic Email Alerts $05FREE

Our Services

Join us for the best experience while seeking writing assistance in your college life. A good grade is all you need to boost up your academic excellence and we are all about it.

  • On-time Delivery
  • 24/7 Order Tracking
  • Access to Authentic Sources
Academic Writing

We create perfect papers according to the guidelines.

Professional Editing

We seamlessly edit out errors from your papers.

Thorough Proofreading

We thoroughly read your final draft to identify errors.


Delegate Your Challenging Writing Tasks to Experienced Professionals

Work with ultimate peace of mind because we ensure that your academic work is our responsibility and your grades are a top concern for us!

Check Out Our Sample Work

Dedication. Quality. Commitment. Punctuality

It May Not Be Much, but It’s Honest Work!

Here is what we have achieved so far. These numbers are evidence that we go the extra mile to make your college journey successful.


Happy Clients


Words Written This Week


Ongoing Orders


Customer Satisfaction Rate

Process as Fine as Brewed Coffee

We have the most intuitive and minimalistic process so that you can easily place an order. Just follow a few steps to unlock success.

See How We Helped 9000+ Students Achieve Success


We Analyze Your Problem and Offer Customized Writing

We understand your guidelines first before delivering any writing service. You can discuss your writing needs and we will have them evaluated by our dedicated team.

  • Clear elicitation of your requirements.
  • Customized writing as per your needs.

We Mirror Your Guidelines to Deliver Quality Services

We write your papers in a standardized way. We complete your work in such a way that it turns out to be a perfect description of your guidelines.

  • Proactive analysis of your writing.
  • Active communication to understand requirements.

We Handle Your Writing Tasks to Ensure Excellent Grades

We promise you excellent grades and academic excellence that you always longed for. Our writers stay in touch with you via email.

  • Thorough research and analysis for every order.
  • Deliverance of reliable writing service to improve your grades.
Place an Order Start Chat Now