Subphylum Chelicerata Notes

characteristics for subphylum Chelicerata

1. Phylum Arthropoda
Subphylum Chelicerata

2. Phylum Arthropoda
Subphylum Chelicerata
Characterized by having a pair of
appendages called chelicerae on each
side of their mouth.
They have no antennae.

3. Examples of Chelicerates

4. Examples of Chelicerates
•Horseshoe Crabs

5. Examples of Chelicerates
•Horseshoe Crabs
•Spiders

6. Examples of Chelicerates
•Horseshoe Crabs
•Spiders
•Scorpions

7. Examples of Chelicerates
•Horseshoe Crabs
•Spiders
•Scorpions
•Ticks and Mites

8. Examples of Chelicerates
•Horseshoe Crabs
•Spiders
•Scorpions
•Ticks and Mites
•Harvestmen

9. Examples of Chelicerates
•Horseshoe Crabs
•Spiders
•Scorpions
•Ticks and Mites
•Harvestmen
•Pseudoscorpions

10. Chelicerae of a horseshoe crab are chelate.

11. Chelicerae of a
spider.

13. Spiders’ chelicerae
have fangs used to
inject venom into
their prey.

14. Scorpions’
chelicerae are
chelate.

15. Chelicerates’ second pair of appendages are
called pedipalps.

16. A horseshoe crab’s pedipalps are chelate
and are used to hold food. They look much
like their legs.

17. Scorpions also
have chelate
pedipalps. They
use them to hold
their prey while
they
envenomate
them with their
poison sting.

18. Spider pedipalps look like their legs. They use
them for walking.

19. Some male spiders
have bulbs at the
end of their
pedipalps which they
use to hold sperm as
they shove it into the
females reproductive
opening.

20. Pseudoscorpions’
pedipalps are
chelate. They have
tiny spurs on them
that deliver venom
when they close
their pedipalps on
their prey.

21. Since the term venom has come up
several times, this is a good time to
define it.

22. Since the term venom has come up
several times, this is a good time to
define it.
Venom is a mix of proteins animals
use to kill or paralyze their prey.

23. Since the term venom has come up
several times, this is a good time to
define it.
Venom is a mix of proteins animals
use to kill or paralyze their prey.
Venom must be injected.

24. Since the term venom has come up
several times, this is a good time to
define it.
Venom is a mix of proteins animals
use to kill or paralyze their prey.
Venom must be injected. Poisons
are ingested (swallowed).

25. Spider bites leave two
small puncture wounds.
If the injected venom is
particularly potent, the
digestive enzymes in it can
cause a great deal of
tissue damage.

28. Ticks and mites also
have chelicerae and
pedipalps.

29. Ticks and mites also
have chelicerae and
pedipalps.
Ticks pose a public
health issue. The
deer tick is the vector
for Lyme Disease
and Rocky Mountain
Spotted Fever is
spread through a
tick’s bite.

30. Males do not develop a
swollen abdomen. They
usually feed on plants.
Females feed on blood.
They engorge with blood
to provide nutrients for
their eggs.

31. Chiggers are mite
larvae. They feed by
injecting enzymes that
digest a tunnel. Then
they enter the tunnel
and feed on cellular
fluids.
Some people are
extremely allergic.
They like places where
your clothing is tight to
your skin.