Laboratory 5 dermoptera, scandentia, primates



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LABORATORY 5 – DERMOPTERA, SCANDENTIA, PRIMATES

Know the taxonomic terms in bold type. For laboratory, be able to identify the key characteristics present in the available specimens. Other characters will be useful to know for lecture.




Order DERMOPTERA–colugos

  1. Family Cynocephalidae

    1. Southeast Asian gliders

    2. membrane extending from neck to digits of forefeet, from

forelimbs to digits of hindfeet, and from hindlimbs to tip of tail

    1. two inner lower incisors on each side wide, comb-like [pectinate], and procumbent; outer lower incisors multi-cusped






Order SCANDENTIA–tree shrews

1. Family Tupaiidae [Fig. 11.16]



  1. South-east Asian

  2. Squirrel-like

  3. Post-orbital bar is present

  4. Perforated zygomatic arch

  5. Canines are small and premolariform



Order PRIMATES:

Traits

1. Petrosal bulla



2. Nail present on hallux, usually on other digits

3. Pollex (thumb) and/or hallux opposable

4. Postorbital bar or postorbital plate

5. Large braincase with large orbits



6. Reduced snout and overlapping visual fields
Classification

Prosimians: A paraphyletic group containing the lemuroids, lorisoids, and tarsiers.



Strepsirhines: the monophyletic lemuroids and lorisoids

Traits

A. moist, wet, hairless nose (rhinarium)

B. nostrils - crescentic slit

C. postorbital bar


Haplorhines: the monophyletic tarsiers and

anthropoids



Traits

A. Postorbital plate closing most (tarsiers) or all (anthropoids) of orbit

B. skin-covered nose (loss of rhinarium)

C. Spatulate incisors



  1. Family
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