BIOLOGY 306 COMPARATIVE VERTEBRATE ANATOMY

LAB # 4

Skeletal Systems: Shark, Fish, Frog

Quiz: Figs. 2-13, 2-14, 2-15; p. 43.

I. ANATOMY OF THE DOGFISH SHARK: Exercise 2, Skeletal System p. 37-43

1. Two types of skeletal preparations are available for your study: an articulated chondrocrania and splanchnocrania, and separate chondrocrania. Study these and find all labeled structures with the following omissions:

OMIT: figs. 2-9 and 2-10 (p. 42), figs. 2-11 and 2-12 (p. 43).

II. SKELETAL SYSTEM: Class Actinopterygii - Use diagrams handed out in lab.

A. Subclass Holostei

1. Amia (Bowfin): Skull

Examine skulls of Amia and identify all bones listed on the appropriate skeletal diagrams. OMIT coronoids on lower jaw.

2. Lepisosteus (Gar): Skull

Examine skulls of Lepisosteus and identify all bones listed on the appropriate skeletal diagrams.

B. Subclass Teleostei:

1. Perca (Perch): Skull and skeleton diagram.

Examine the three articulated skeletons and perch skulls and find all bones listed.

III. SKELETAL SYSTEM: Class Amphibia

A. Order Anura

1. Rana (Bullfrog): Skull and postcranial skeleton

Examine specimens. Learn all bones listed on handout. OMIT hyoid apparatus.