Topic 2: Shark Taxonomy Flashcards
(126 cards)
All sharks, skates and rays are classified into what class?
- Chondrichthyes
Under the class Chondrichthyes what is the subclass that contains the sharks, skates and rays? Also what subclass contains chimaeras?
- Elasmobranchii 2. Holocephali
The Elasmobranchii are divided into three super-orders. What are they? Which one(s) pertain to the living?
- Cladoselachimorpha –> extinct 2. Euselachi –> living L> Sharks….8 orders ( >470 species) 3. Batoidea (Batoids) –> living L> skates and rays … 3 orders (+600 species)
What are the eight orders under the superclass Euselachi (Sharks) ? ( Animalia–> Chordata—-> Vertebrata—>Chondrichthyes—> Elasmobranchii—> Euselachi—->8??)
- Pristiophoriformes 2. Squatiniformes 3. Squaliformes 4. Hexanchiformes 5. Lamniformes 6. Carcharhiniformes 7. Orectolobiformes 8. Heterodontiformes
What is the common name for sharks that belong to the order Pristiophoriformes?
Saw sharks
What is the common name for sharks that belong to the order Squatiniformes ?
Angel sharks
What is the common name for sharks that belong to the order Squaliformes ?
Dogfish sharks
What is the common name for sharks that belong to the order Hexanchiformes ?
Sixgilled sharks (but can have 7)
What is the common name for sharks that belong to the order Lamniformes ??
Mackerel sharks
What is the common name for sharks that belong to the order Carcharhiniformes ??
Ground sharks
What is the common name for sharks that belong to the order Orectolobiformes ??
Carpet sharks
What is the common name for sharks that belong to the order Heterodontiformes ??
Bullhead sharks
What is the very first thing examined on a shark for classification?
- presence or absence of anal fin!
Shark Classification: 1) A. If there is no anal fin? (3)
- Squatiniformes 2.Pristiophoriformes 3. Squaliformes
Shark Classification: 1) B. If there is an anal fin present? (5)
- Hexanchiformes 2. Lamniformes 3. Carcharhiniformes 4. Orectolobiformes 5. Heterodontiformes
Shark Classification: 2) (i)A. No anal fin present. Is it flattened and ray like, mouth terminal? (1)
- Squatiniformes- angel sharks
Shark Classification: 2) (i) B. No anal fin present. It’s not flat and ray like, mouth is ventral?(2)
- Snout is long and sawlike 2. Snout is short and not sawlike
Shark Classification: 2) (i) B. No anal fin present. It’s not flat and ray like, mouth is ventral? 1. Snout is long and saw like…??
Pristiophoriformes L> saw sharks L> have bar bells
Shark Classification: 2) (i) B.B. No anal fin present. It’s not flat and ray like, mouth is ventral? 2. Snout is short and not sawlike? (1)
- Squaliformes L> dogfish sharks
Shark Classification: 2) (ii) A. Anal fin is present….next question? (2)
- 6 or 7 gill slits and one dorsal fin 2. 5 gill slits and 2 dorsal fins
Shark Classification: 2) (ii) A. Anal fin is present L> 6 or 7 gill slits and on dorsal fin… what shark is it ?
- Hexanchiformes…..frilled sharks, six gill and seven gill sharks
Shark Classification: 2) (ii) A. Anal fin is present L> 5 gill slits and 2 dorsal fins L> next two questions??
- It has no dorsal fin spines? (common) 2. It has dorsal fin spines?
Shark Classification: 2) (ii) A. Anal fin is present L> 5 gill slits and 2 dorsal fins L> it has dorsal fin spines therefore what shark order??
- Heterodontiformes L> bullhead sharks …horn sharks
Shark Classification: 2) (ii) A. Anal fin is present L> 5 gill slits and 2 dorsal fins L> it has no dorsal fin spines…next two questions?
- The mouth is behind the eyes. 2. The mouth is well in front of the eyes.