1. Fish
Clade Agnatha

2. Ancestors of Jawless Fishes
Ostracoderms
Had bony scales as body armor
Paleozoic Era
hfvB47Mc

4. Cyclostomata Hagfish & Lampreys Lack a jaw Lack internal ossification
Lack paired fins
Lack scales
Cyclostomata
Hagfish & Lampreys

6. Hagfish All marine Approximately 70 species
Mouth with rasping tongue & 4 rows of keratinized teeth
No stomach, strictly scavengers
Almost blind, keen sense of smell

10. Lampreys Freshwater & Marine, free-living & parasitic
Approximately 38 species
7 pair gills, each with external opening
sucker-like oral disk & rasping tongue
single nostril

13.
(dissection)