Presentation Lobster

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is a species of

lobster found on

the Atlantic

coastof North

America, chiefly

from Labrador to

New Jersey.

The American lobster

Mega Kharisma


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Kingdom Animalia

Taxonomy


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Phylum Arthropoda

Taxonomy


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Arthropoda

Tree of Life Web Project. 1995. Arthropoda. Version 01 January 1995 (temporary).http://tolweb.org/Arthropoda/2469/1995.01.01in TheTree of Life Web Project, http://tolweb.org/


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Class Crustacea

Taxonomy


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Crustaceans

Tree of Life Web Project. 2002. Crustacea. Crabs, lobsters, shrimp, barnacles, sow bugs, etc.. Version 01 January 2002 (temporary).http://tolweb.org/Crustacea/2529/2002.01.01in The Tree of Life Web Project, http://tolweb.org/


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Subclass Malacostraca

Taxonomy


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Malacostraca

Tree of Life Web Project. 2002. Malacostraca. Version 01 January 2002 (temporary).http://tolweb.org/Malacostraca/6253/2002.01.01in TheTree of Life Web Project, http://tolweb.org/


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Order Decapoda

Taxonomy


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Decapoda


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Astacidea


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Nephropoidea

Tree of Life Web Project. 2010. Nephropoidea. Version 11 March 2010 (temporary).http://tolweb.org/Nephropoidea/6661/2010.03.11in TheTree of Life Web Project, http://tolweb.org/


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Family Nephropidae

Taxonomy


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Nephropidae

Tree of Life Web Project. 2010. Nephropidae. Version 01 April 2010 (temporary).http://tolweb.org/Nephropidae/6663/2010.04.01in The Treeof Life Web Project, http://tolweb.org/


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Genus Homarus

Taxonomy


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americanusSpecies

Taxonomy


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Homarus americanus

Taxonomy


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Geographic Range

Geographical Distribution : Western

Atlantic: Atlantic coast of North

America between Newfoundland

(Canada) and North Carolina (USA


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M

O

R

F

O

L

OG

Y


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Homarus americanus commonlyreaches 824 inches (200610 mm)

long and weighs 19 pounds (0.454.1

kg) in weight, but has been known to

reach lengths over 3 ft (0.91 m) andweigh as much as 44 lb (20 kg) or more,

making this the heaviest marine

crustacean in the world


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Homarus americanus is distributed

along the Atlantic coast of North

America, from Labrador in the northto Cape Hatteras, North Carolina in the

south.


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Head

The antennae measure about 2 in (51 mm) long and

split into Y-shaped structures with pointed tips. Each

tip exhibits a dense zone of hair tufts staggered in a

zigzag arrangement.

Lobsters have two urinary bladders,

located on either side of the head.


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Thorax

The first pair of pereiopods (legs) is armed with a large,

asymmetrical pair of claws.[2] The larger one is the

"crusher", the other is the "cutter",

Coloration

American lobsters are usually bluish green to brown

with red spines, but a number of color variations have

been observed.


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Nervous System

The lobsters nervous system is very

primitive. In fact it is most similar to the

nervous system of an insect. Neither insects

nor lobsters have brains. Further, lobstersand other invertebrates have only

approximately 100,000 neurons while

humans have over 100 billion.


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Circulation

A lobster's blood is usually greyish/clear

in color. It is circulated by a heart located

just behind the stomach, through a few

large blood vessels. It picks up oxygen

from the water through the gills, found

in the lobsters' thorax section.


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The closest relative ofH. americanus is the

European lobster, Homarus gammarus.

The rostrum ofH. americanus bears one or more

spines on the underside, which are lacking

in H. gammarus. The spines on the claws ofH. americanus are red or

red-tipped, while those ofH. gammarus are white

or white-tipped.

The underside of the claw ofH. americanus isorange or red, while that ofH. gammarus is creamy

white or very pale red.
http://en.wikipedia.org/wiki/Homarus_gammarushttp://en.wikipedia.org/wiki/Homarus_gammarushttp://en.wikipedia.org/wiki/Homarus_gammarushttp://en.wikipedia.org/wiki/Homarus_gammarus


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Picture


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Brusca, R.C. 2000. Unraveling the history of arthropod

diversification. Annals of the Missouri Botanical

Garden 87:13-25

ReferencesAkam, M. 2000. Arthropods: Developmental diversity within

a (super) phylum. Proceedings of the National

Academy of Sciences (USA) 97:4438-4441.

Tree of Life Web Project. 2002. Crustacea. Crabs, lobsters,

shrimp, barnacles, sow bugs, etc.. Version 01 January

2002 (temporary).http://tolweb.org/Crustacea/2529/2002.01.01in The

Tree of Life Web Project, http://tolweb.org/

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Presentation Lobster