Lab 2: Phylum Porifera, Phylum Cnidaria, & Phylum Ctenophora
MOVIE: Biology of the Coelenterates
I.
Phylum Porifera – the sponges (p. 99-108)
A. Class Calcarea – spicules of CaCO3 (lime)
1. Leucosolenia – an asconoid sponge (Fig. 7.6, p. 103)
a. Slides of whole mount (w.m.)
b. Bioplastic
2.
Scypha (Grantia) – a syconoid sponge, p. 103-105
a. Slides of x.s. & spicules
b. Preserved and bioplastic
c. 2 models
B. Class Hexactinellida – spicules of SiO2 (quartz)
1. DEMOS
C. Class Demospongiae – horny sponges, Leucon bodies
1. DEMOS
II.
Phylum Cnidaria (p. 109-128)
A. Class Hydrozoa – polyps usually dominant
1. Hydra – FW, solitary
a. LIVE! Feed them Daphnia (See also Fig. 8.4, 8.9, and 8.10)
b. Slides of plain, budding, female w/ ovaries, male w/ testes, and
x.s. (See also Fig. 8.11)
c. Model – Compare with Fig. 8.5 and 8.6, p. 113
2.
Gonionemus – an atypical hydrozoan w/ large medusa
a. Preserved specimens
3.
Obelia – a typical colonial hydrozoan!
a. Slides with hydranths and gonangia
b. Slides of tiny medusa
4.
Physalia – Portuguese man-of-war
a. Preserved
b. Bioplastic
B. Class Scyphozoa – true jellyfish
1. Aurelia adults
a. Preserved
b. Bioplastic
c. slides of planula, scyphistoma, strobila, and ephyra
C. Class Anthozoa – polyps only
1. DEMO - Metridium – sea anemone, preserved (Fig. 8.19)
2. May be live in reef tank
3. Hard and soft coral DEMOS
III.
Phylum Ctenophora – comb jellys (Fig. 8.3, p. 110-111)
A. DEMOS – know the main differences of these organisms from Cnidarians