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Ch 12 Panarthropoda

Zoology 212 Lecture notes on Panarthropoda CH 12
Course

Zoology (BIOL 212)

28 Documents
Students shared 28 documents in this course
Academic year: 2022/2023
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Saginaw Valley State University

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1 1 Panarthropodans displays metamerism and ventro-laterally directed, paired appendages with terminal claws. Tardigrada Onychophora Arthropoda Eye of Science/Science Source Onychophora Ecdysis [as ecdysozoan] Hemocoel & open circulatory system Shizocoelous coelom [as protostome] This hypothesis differs from your textbook! 1 Pdphoto 2 Tardigrades have 4 pairs of stubby unjointed appendages, live in moss / lichen and eat algae and small invertebrates. ambergold/news/219/367/Slow-walkers/d,Blog_eng teamtardigrades.blogspot/p/breeding-habits.html Dehydrated to 3% water. They can withstand extreme environmental stress [cryptobiosis] and are virtually cosmopolitan. 6000 m altitude, 4000 m at ocean depth, from poles to equator. They can survive -200 C for days, boiling hot springs, and 151 C for minutes. They can live for a 100 years without water, for periods without oxygen, in a vacuum, and can survive huge doses of radiation. Science Source 2 a

####### clade

made

of /

zphulums

P. P. P. water bears -

nonliving

cuticle

  • ability to molt
  • Sperm have pseudopodium

:::÷÷

  1. Panarthropods ↓ arthropods "
hidden

life " ~

2

3

Onychophorans [velvet worms] have a thin, permeable

exoskeleton with open spiracles thus restricting them to

humid tropical & sub-tropical regions and nocturnal lifestyle.

Walking appendages: lobopods Well-developed eyes Fusion and modification of segments but only weak tagmosis Morley Read, Science Photo Library 3 4

Onychophoran [velvet worms] anatomy can be tracked back

to the Early Cambrian [550 Ma].

Hallucigenia “Jaws” Piotr Naskrecki/M inden Pictures/Corbis Hydroscopic receptors Defense & foraging: Slime glands Well-developed eyes mouth Oral papilla 4

  • foot

Permiable

exoskeleton

found in

paμaaBÉ

"

humid habilis

e. segmentation opensperide

= loss of

water vapor

← sensory testicles - Slime

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Ch 12 Panarthropoda

Course: Zoology (BIOL 212)

28 Documents
Students shared 28 documents in this course

University: Saginaw Valley State University

Was this document helpful?
1
1
Panarthropodans displays metamerism and ventro-laterally
directed, paired appendages with terminal claws.
Tardigrada Onychophora Arthropoda
Eye of Science/Science Source Onychophora.com
Ecdysis [as ecdysozoan]
Hemocoel & open circulatory system
Shizocoelous coelom [as protostome]
This hypothesis
differs from your
textbook!
1
Pdphoto.org
2
Tardigrades have 4 pairs of stubby unjointed appendages,
live in moss / lichen and eat algae and small invertebrates.
http://ambergold.ru/news/219/367/Slow-walkers/d,Blog_eng
http://teamtardigrades.blogspot.com/p/breeding-
habits.html
Dehydrated to 3% water.
They can withstand extreme environmental stress
[cryptobiosis] and are virtually cosmopolitan.
6000 m altitude, 4000 m at ocean depth, from poles to equator.
They can survive -200 C for days, boiling hot springs, and 151 C for minutes.
They can live for a 100 years without water, for periods without oxygen, in a vacuum, and
can survive huge doses of radiation.
Science Source
2
a
clade
made
of
/
zphulums
P
.
P
.
P
.
water
bears
-
nonliving
cuticle
-
ability
to
molt
-
Sperm
have
pseudo
podium
:::÷÷
2.
Pan
arthropods
↓
arthropods
"
hidden
life
"
~

Students also viewed

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