Common Name:
Scientific Name:
Family Name:
Lamprey,�Northern�Brook
Ichthyomyzon�fossor
Lampreys�(Petromyzontidae)
Image Name:
Description:
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ID Feature 1: Myomere Count
ID Feature 2: Myomeres
ID Feature 3: Dorsal Fin
ID Feature 4: Teeth
ID Feature 5: Teeth
Side view: Count myomeres from branchial pores to anus. Notice the connected dorsal fins.
Close-up anterior: There are 46-56 trunk myomeres. Start myomere count behind last branchial pore.
Close-up dorsal fin: The two lobes of the dorsal fin are broadly connected.
Close-up mouth: Notice the unicuspid circumoral teeth and the supraoral teeth which are very close-together.
Close-up teeth: Notice the unicuspid circumoral teeth and close-together supraoral teeth.