Vertebrate Zoology - PowerPoint PPT Presentation

Loading...

PPT – Vertebrate Zoology PowerPoint presentation | free to download - id: 42bb90-YTI1Z



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Vertebrate Zoology

Description:

Agnatha Hagfish & Lamprey Vertebrate Zoology Key Features Jaws are absent. Paired fins are generally absent. Early species had heavy bony scales and plates in their ... – PowerPoint PPT presentation

Number of Views:905
Avg rating:3.0/5.0
Slides: 29
Provided by: StudentSt2
Learn more at: http://phsgirard.org
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Vertebrate Zoology


1
Vertebrate Zoology
  • Agnatha
  • Hagfish
  • Lamprey

2
Key Features
  • Jaws are absent.
  • Paired fins are generally absent.
  • Early species had heavy bony scales and plates in
    their skin

3
Key features cont
  • In most cases the skeleton is cartilaginous. The
    embryonic notochord persists in the adult.
  • Seven or more paired gill pouches are present.
  • Hagfish sheds slime layer

4
Key features cont
  • A light-sensitive pineal eye is present.
  • The digestive system lacks a stomach.
  • External fertilization both ovaries and testes
    present in individual but gonads of only one sex
    functional in hagfishes, no larval stage
    separate sexes and a long larval stage in
    lampreys.

5
(No Transcript)
6
(No Transcript)
7
(No Transcript)
8
Hagfish Classification
  • Kingdom Animalia
  • Phylum Chordata
  • Class Pteraspidomorphi
  • Order Myxiniformes
  • Family Myxinidae
  • Genus Myxine
  • Species glutinosa

9
(No Transcript)
10
Slime Glands
11
(No Transcript)
12
(No Transcript)
13
Hagfish
  • Hagfish can be found in chilly waters
  • They tend to live on and in muddy sea floors in
    very dense groups (up to 15,000 in an area).
  • Because females tend to produce large eggs in
    small numbers, their population sizes suggest a
    low death rate.

14
Hagfish
  • Diet is made up of marine worms and other
    invertebrates
  • They have a ring of short sensitive tentacles
    around their mouths.
  • Large slime glands line their sides along the
    length of their bodies.
  • Can sneeze to clear slime from nostrils

15
  • No jaws. Instead they have two pairs of rasps
    on top of a tongue. They pull meat into their
    mouths with the tongue, then tear it off the prey
    with the rasps.

16
(No Transcript)
17
Hagfish Anatomy
18
  • Hagfish have a very low metabolism. Once they
    eat, they may not have to again for up to seven
    months.
  • Although hagfish have a partial skull, they have
    no back bone, so are not true vertebrates. What
    skeleton they do have is made of cartilage.

19
(No Transcript)
20
Lamprey Classification
  • Kingdom Animalia
  • Phylum Chordata
  • Subphylum Vertebrata
  • Class Cephalaspidomorphi
  • Order Petromyzontiformes
  • Family Petromyzontidae

21
(No Transcript)
22
Lamprey Dissection
  • External
  • Mouth
  • Head Pharynx
  • Heart
  • Gonads

23
(No Transcript)
24
(No Transcript)
25
(No Transcript)
26
(No Transcript)
27
(No Transcript)
28
(No Transcript)
About PowerShow.com