1. Vertebrate Zoology
Agnatha
Anugerah lestari(1114040190)
Rizky wildayani(1114040201)
Suharyanti Amir ( 1114040
Hagfish
& Lamprey

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

3. Key features con’t
 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
 The mouth is in ventro-anterior and plays role as a
sucker

4. Key features con’t
 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. Systema Digestoria
Consist of ventral mouth contained
within buccalis closed or open
channel by moving the shape of
“platuk “tongue.

6. Skeleton system
Notochord are partial body axis, in
the form of cylindrical rods of gelatin
material encased by connective
tissue. Part skeleton other form
cartilage.

7. Excretory system
Two kidney (mesonephros) located
next to the dorsal body cavity: an
elongated ureter vessels of each
mesonephros until urogentalis , which
then emptied its contents through
urogenital papilae.

8. Respiration system
Among the respiratory tract and the
body wall are 7 pairs of gills in
kentung gill-sac which is located next
to the contiguous. Each sheet
contains gill capillaries

9. Circulation system
The shaped is like trophies at the end
of the posterior pocket located inside
the cavity related pericardial cavity
coelom.

10. Digestoria system
Consist of ventral mouth contained
within buccalis closed or open channel
by moving the shape platuk tongue.

11. Sensoris
Nasal cavity open toward the saccus
olfactorious gets olfactorious nerves
from both lobes of the brain. There
pinealis the lensed eyes bright and
pigmented retine. Necrotic foci in the
pharynx and flavorings are contained
in the next line laterals contiguous
body contains the sense of touch.

12. Reproduction system
Phase starters could not distinguish
between males and females, the next
phase will grow into males and
females.

16. Hagfish Classification
• Kingdom Animalia
• Phylum Chordata
• Class Pteraspidomorphi
• Order Myxiniformes
• Family Myxinidae
• Genus Myxine
• Species Myxine glutinosa

18. Slime Glands

21. 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.

22. 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

23. 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.

25. Hagfish Anatomy

26. 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.

28. Lamprey Classification
Kingdom Animalia
Phylum Chordata
Subphylum Vertebrata
Class Cephalaspidomorphi
Order Petromyzontiformes
Family Petromyzontidae
Genus Petromyzon
Species Petromyzon marinus

30. Lamprey Dissection
External
Mouth
Head & Pharynx
Heart
Gonads

31. IC
RI ST
AC TE
AR
CH
 The body shape is round-long shape or cylinder, the
tail is flat
 The mouth is in ventro-anterior and plays role as a
sucker
 Bones of head and archus viceralis are made by
hondrocyte bone
 The blood contains round leucocyte and erythrocyt
which have nucleus
 In the right and left area of pharynx, there are 6-14
pairs of gill which put in a sack
 The brain has growth well with 8-10 pairs of cranialis
nervous
 Term of body depens on environment ( poikilothermis)
 The fertilization happens outside, egg will attaches to
be larva ( Pe tro m y z o n m a rinus ), or egg will grow to be