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Side ASide B
are mostly marine, colonial organisms that attach to substrates and feed only on microscopic...
Where Undigested material and water pass out through an opening at the top called an
do not have nervous, digestive, or circulatory systems. Instead, most rely on maintaining...
either remain separate and embedded in the wall of the sponge or united in a continuous scaffolding...
Large spicules that are visible to the naked eye
Anthozoa (sea anemones, corals)
are marine animals that consist of polyps, bag-shaped structures with their interiors lined...
are all colonial, with calcite corallites joined to form a corallum. Vertical septa are...
are solitary, but some are colonial, and they tend to be more complex than the tabulate corals....
Most of them have an exoskeleton or a shell of some kind secreted by the mantle. They are...
Anatomy of Mollusca
The body consists of a head (except in the pelecypods), a foot, and a dorsal portion which...
Amphineura Pelecypoda Gastropoda Conularida Pteropoda Scaphopoda Cephalopoda
also known as bivalves, are represented by clams, muscles, and oysters, among others....
Anatomy of Pelecypods
They have a calcareous shell of two valves with bilateral symmetry between the valves....
are represented by the snails, single-‐valved mollusks, and include marine, freshwater,...
Anatomy of a Gastropod
Their mouth contains a radula, a minutely toothed, filelike, chitinous ribbon, which is...
The embryonic shell
The shell grows as a gradually widening cone which is wound around an axial pillar
each coil of the gastropod
last coil where the animal lives
are all the other whorl's together
may have straight, loosely coiled, or tightly coiled shells.
have the simplest suture pattern of the ammonoids. numerous undivided lobes and saddles;...
have a more complicated suture pattern than the goniatites. lobes have subdivided tips,...
have the most complicated suture pattern of the ammonoids.lobes and saddles are much subdivided...
are bilaterally symmetric carnivorous marine animals that are nearly all free-‐ swimming....
Anatomy of a Cephalopod
The circulatory, digestive, nervous, and respiratory systems of cephalopods are all very...
were abundant during the Jurassic and Cretaceous. An example of a fossil belemnoid is Belemnitella...
: A hood, formed from the inner pair of tentacles, serves the same function as the...
or bristleworms, are Planktonic Tomopteris the largest group of annelids and are mostly...
used for locomotion and, in many species, act as the worm’s primary respiratory surfaces...
fossilized jaws in polichaetes
Anatomy of a Trilobite
have a dorsal exoskeleton that is longitudinally divisible into three regions, an axial...
, which includes spiders and scorpions
horseshoe crabs and an extinct group of sea scorpions called the eurypterids
which includes the sea spiders
formed from the inner pair of tentacles, serves the same function as the operculum in...
a calcareous wall surrounding the siphon
The lines formed by the intersection of the septa with the shell
tubular extension of the mantle
coiled right handed gastropod shell
coiled left handed gastropod shell