Wall 1 ic

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Author:
tkschmidt
ID:
186158
Filename:
Wall 1 ic
Updated:
2012-11-29 20:04:15
Tags:
fish bio wall
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Description:
Biology of fishes lab, specimens from wall 1, identifying characters
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  1. Superclass Agnatha
    • eel-like fishes
    • lack paired fins, jaws and scales
    • pore-like gill openings
  2. Family Myxinidae
    • mouth surrounded by barbels
    • 1 or 5-16 pore-like gill openings
    • eyes rudimentary
  3. Family Petromyzontidae
    • mouth armed with circle of horny teeth
    • 7 pairs of gill pores
    • lack barbels
  4. Superclass Gnathostomata
    • hinged jaws
    • paired fins
    • 3 semicircular canals on each side of head
  5. Class Chondrichthyes
    • cartilaginous skeleton
    • males have paired claspers as intromittent organ
    • 4-7 pairs gills/gill slits
  6. Subclass Holocephali
    • 4 pairs gill openings with fleshy operculum
    • no stomach or ribs
    • atenacula (knob on forehead serves as copulatory organ)
  7. Order Chimaeriformes
    • 2 dorsal fins, first with spine
    • long thing tail
    • mouth always inferior
  8. Subclass Elasmobranchii
    • 5-7 pairs gill openings
    • dorsal spiracle
    • placoid scales
  9. Order Heterodontiformes
    • 2 dorsal fins, both with spine
    • anal fin
    • prominent supraorbital ridges
  10. Order Carcharhiniformes
    • long snout and mouth, slightly depressed head
    • 2 dorsal fins, no spines
    • anal fin
  11. Order Orectolobiformes
    • 2 dorsal fins, no spines
    • 5 gill slits
    • mouth anterior to eyes and near end of snout
  12. Order Lamniformes
    • 2 dorsal fins, no spines
    • mouth continues back past front of the eyes
    • dorsal in front of pelvics
  13. Order Hexanchiformes
    • 6 or 7 pairs of gill slits
    • single dorsal, posterior to pelvics
    • anal fin
  14. Order Squaliformes
    • 2 dorsal fins, sometimes with spines
    • no anal fin
    • small, ventral mouth
  15. Order Squatiniformes
    • depressed body with pectorals not fused to head
    • 2 dorsals posterior to pelvics
    • no anal fin
  16. Order Rajiformes
    • depressed body with large pectorals fused to head
    • eyes and spiracles dorsal
    • gill openings ventral
  17. Family Rhinobatidae
    • denticles and middorsal spines
    • leading edge of disc not rounded (angular)
    • large caudal fin (thicker tail than skates)
  18. Family Rajidae
    • slender, flattened tail with no stinging spine
    • 2 dorsal fins
    • caudal fin reduced or absent
  19. Family Torpedinidae
    • short, stout tail with well developed caudal fin
    • 1, 2 or no dorsal fins
    • body flattened, oval disk shape
  20. Family Dasyatidae
    • barbed sting(s) along tail (tail long and whip-like)
    • no caudal fin
    • 1 or no dorsal fin
  21. Family Myliobatidae
    • head raised above disk
    • single dorsal fin
    • spine(s) located behind dorsal fin
  22. Family Pristidae
    • long, flat snout with teeth like a saw
    • dorso-ventrally compressed
    • pectoral fins fused to head
  23. Grade Teleostomi
    • dermal bone
    • bony operculum over gills
    • fin rays
  24. Class Sarcopterygii
    • paired fins have muscular lobes extending to external base of fins
    • cosmoid scales
    • lungs
  25. Order Coelacanthiformes
    • skeleton of bone and cartilage
    • fins fleshy and lobed
    • caudal fin symmetric with 3 lobes
  26. Subclass Dipnoi
    • teeth fused into grinding plates
    • median fins continuous
  27. Order Ceratodontiformes
    • eel-like body with flipper-like paired fins
    • no aestivation
    • unpaired lung
  28. (Order ??) South American and African Lungfishes
    • paired filamentous fins
    • paired lungs
    • aestivation
  29. Class Actinopterygii
    • fins attached to body by fin rays
    • branchiostegal rays
    • external nostrils
  30. Family Polypteridae
    • thick-bodied, eel-like
    • 5-18 finlets (dorsal fin)
    • throat coverd in gular plate
  31. Subclass Chondrostei
    • ganoid scales
    • spiracles
    • heterocercal tail
    • (all ancestral features)
  32. Family Acipenseridae
    • scaleless, but with 5 rows of bony scutes/plates
    • 4 pairs barbels in front of mouth
    • caudal fin strongly heterocercal
  33. Family Lepisosteidae
    • long, thin body with elongate jaws
    • dorsal and anal fins located far posteriorly
    • heavy ganoid scales
  34. Family Amiiformes
    • cycloid scales
    • heterocercal tail
    • long dorsal fin

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