Lab 6

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Author:
lndsyfree
ID:
273154
Filename:
Lab 6
Updated:
2014-05-04 18:22:08
Tags:
wfcb
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Description:
Rodentia I
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  1. Rodentia
    • Order within the Infraorder Eutheria
    • Includes Suborders Sciuromorpha and Hystricomorpha
  2. Sciuromorpha
    Suborder within the Order Rodentia
  3. Aplodontidae
    • Family with the Suborder Sciuromorpha
    • Mountain beaver
    • 1. Inflected angular process on lower jaw
    • 2. Crowns of cheekteeth ringlike w/ small projections
    • 3. Apple-shaped teeth
  4. Sciuridae
    • Family within the suborders Sciuromorpha
    • Squirrels, chipmunks, prairie dogs, marmots
    • 1. Large postorbital process
    • 2. infraorbital foremen very small, slit-like
    • 3. Rounded auditory bulla
  5. Castorimorpha
    • Suborder within the Order Rodentia
    • Contains families Castoridae, Heteromyidae, Geomyidae
  6. Castoridae
    • Family within the Suborder Castorimorpha
    • Beaver
    • 1. Distinct depression in basioccipital
    • 2. Very sturdy skull
  7. Heteromyidae
    • Family within the suborder Castorimorpha
    • Pocket mice, kangaroo rats, kangaroo mice
    • 1. Fur-lined cheekpouches
    • 2. infraorbital canal compressed against and entirely piercing the rostrum, opening laterally
    • 3. Heart-shaped bulla
  8. Geomyidae
    • Family within the suborder Castorimorpha
    • Pocket gophers
    • 1. 2 large pits located in palate behind last molars
    • 2. Premolar figure 8-shaped (easier to see on larger skulls)
    • 3. infraorbital canal compressed against side of rostrum, opening anterolaterally
    • 4. Crowns of cheekteeth simple

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