Title: Evolutionary Relationships
1Outline
- Evolutionary Relationships
- Acoelomates (sort of)
- Phylum Platyhelminthes
- Phylum Nemertea
- Gnathiferans
- Phylum Rotifera
- Phylum Acanthocephala
2Evolutionary Relationships I
3Evolutionary Relationships II
CHARACTERISTICS OF THE BILATERIA
1) Bilateral symmetry
-- mirror images about sagittal plane
2) triploblastic
-- embryonic mesoderm is present
3) separate mouth and anus
-- digestive tract is complete exceptions among
acoelomates
4) cephalization
-- most have a distinguishable head
5) organ/system grade of organization
-- some simple organ systems
6) primitively protostomous
4Evolutionary Relationships III
5(No Transcript)
6Phylum Platyhelminthes Introduction
7Platyhelminthes Distinguishing Characteristics I
8Platyhelminthes Distinguishing Characteristics II
9Platyhelminthes Distinguishing Characteristics
III
10Platyhelminthes Distinguishing Characteristics IV
11Platyhelminthes Distinguishing Characteristics V
12Platyhelminthes Major Groups
13Platyhelminthes Class Turbellaria
A. Sanchez-Alvarado
14Taenia taeniaeformis BioLib
Platyhelminthes Class Cestoda I
BBC
15Platyhelminthes Class Cestoda II
16Platyhelminthes Class Cestoda III
17Platyhelminthes Class Monogenea
M. Faasse
18Platyhelminthes Class Trematoda I
19Platyhelminthes Class Trematoda II
20NOAA
Phylum Nemertea Introduction
21Nemertea Distinguishing Characteristics I
22Nemertea Distinguishing Characteristics II
23Gnathiferans Phylum Rotifera
24Gnathiferans Phylum Acanthocephala