Geology

44 cards


 
  
Created Dec 18, 2012
by
dm431689

 

 
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1
Sponges
 
are mostly marine, colonial organisms that attach to substrates and feed only on microscopic...
2
osculum
 
Where Undigested material and water pass out through an opening at the top called an
3
Sponges Anatomy
 
do not have nervous, digestive, or circulatory systems. Instead, most rely on maintaining...
4
Spicules
 
either remain separate and embedded in the wall of the sponge or united in a continuous scaffolding...
5
megascleres
 
Large spicules that are visible to the naked eye
6
microscleres
 
microscopic ones
7
Anthozoa (sea anemones, corals)
 
are marine animals that consist of polyps, bag-shaped structures with their interiors lined...
8
tabulate corals
 
are all colonial, with calcite corallites joined to form a corallum. Vertical septa are...
9
Rugose corals
 
are solitary, but some are colonial, and they tend to be more complex than the tabulate corals....
10
Phylum Mollusca
 
Most of them have an exoskeleton or a shell of some kind secreted by the mantle. They are...
11
Anatomy of Mollusca
 
The body consists of a head (except in the pelecypods), a foot, and a dorsal portion which...
12
Mollusca Classes
 
Amphineura
 Pelecypoda
 Gastropoda Conularida
 Pteropoda
 Scaphopoda Cephalopoda
13
The pelecypods
 
also known as bivalves,
are represented by clams, muscles,
and oysters, among others....
14
Anatomy of Pelecypods
 
They have a calcareous shell of two valves with bilateral symmetry between the valves....
15
Gastropods
 
are represented by the snails, single-­‐valved mollusks, and include marine, freshwater,...
16
Anatomy of a Gastropod
 
Their mouth contains a radula, a minutely toothed, filelike, chitinous ribbon, which is...
17
protoconch
 
The embryonic shell
18
columella
 
The shell grows as a gradually widening cone which is wound around an axial pillar
19
whorl
 
each coil of the gastropod
20
body whorl
 
last coil where the animal lives
21
spire
 
are all the other whorl's together
22
Ammonoids
 
may have straight, loosely coiled, or tightly coiled shells.
23
Goniatites  
 
have the simplest suture pattern of the ammonoids.
numerous undivided lobes and...
24
Ceratites
 
have a more complicated suture pattern than the goniatites. lobes have subdivided tips,...
25
Ammonites
 
have the most complicated suture pattern of the ammonoids.lobes and saddles are much subdivided...
26
Cephalopods
 
are bilaterally symmetric carnivorous marine animals that are nearly all free-­‐ swimming....
27
Anatomy of a Cephalopod
 
The circulatory, digestive, nervous, and respiratory systems of cephalopods are all very...
28
Belemnoids
 
were abundant during the Jurassic and Cretaceous. An example of a fossil belemnoid is Belemnitella...
29
Nautilus:
 
: A hood, formed from the inner pair of tentacles, serves the same function as the...
30
Polychaetes
 
or bristleworms, are Planktonic Tomopteris the largest group of annelids and are
mostly...
31
parapodia
 
used for locomotion and, in many species, act as the worm’s primary respiratory surfaces...
32
Scolecodonts
 
fossilized jaws in polichaetes
33
Anatomy of a Trilobite
 
have a dorsal exoskeleton that is longitudinally divisible into three regions, an axial...
34
Arachnida
 
, which includes spiders and scorpions
35
Merostomata
 
horseshoe crabs and an extinct group of sea scorpions called the eurypterids
36
Pycnogonida
 
which includes the sea spiders
37
Hood
 
formed from the inner pair of tentacles, serves the same function as the operculum in...
38
siphuncle
 
a calcareous wall surrounding the siphon
39
sutures
 
The lines formed by the intersection of the septa with the shell
40
siphon
 
tubular extension of the mantle
41
apex
 
posterior end
42
apeture
 
anterior end
43
dextrel
 
coiled right handed gastropod shell
44
sinistral
 
coiled left handed gastropod shell

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