Crustacea
Download
1 / 13

Crustacea - PowerPoint PPT Presentation


  • 169 Views
  • Uploaded on

Crustacea. By: Zackery Zwicker , Benjamin O’Toole, Katey Murphy, Katie Gallant . Evolutionary origin .

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Crustacea' - ethel


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Crustacea

Crustacea

By: ZackeryZwicker, Benjamin O’Toole, Katey Murphy, Katie Gallant


Evolutionary origin
Evolutionary origin

  • Attempts have been made to construct a single hypothetical crustacean ancestor. Such an organism would have to possess: “elongated body, two pairs of appendages in front of the mouth, a pair of mandibles behind the mouth, and numerous trunk segments with appendages that form a continuous series of similar structure”

  • Cephalocaridais proposed as having a body plan from which all crustacean features could emerge

Cephalocarida


  • The earliest crustacean fossils are ostrocods.

  • There is evidence from the Burgess shales that many crustacean features had already evolved during the Cambrian Period (542 million to 488.3 million years ago)

Ostrocod fossil


Anatomy
Anatomy

  • Haemocoel: The body cavity in which blood flows

  • Sensory Organs: Compound eyes, statocysts (fluid filled cysts that sense direction of gravity), tactile hairs that respond to pressure or touch

  • Respiration: Diffusion or gills

  • Central nervous system: Brain and ventral nerve cord


Reproduction
Reproduction

  • Crustacea produce from eggs which have been fertilized by sperm

  • Most of the species are dioecious, there is a male and a female.

  • Most species brood their eggs, meaning they have many eggs that hatch at the same time.


Habitat
Habitat

Crustacea live in:

  • Oceans

  • Fresh water

  • Land

  • Many crustaceans are nocturnal

  • They spend their days hidden in a burrow, buried in the sand or sleeping in a crevice.


Diet

  • carnivores or scavengers

  • some are herbivores and detritivores

  • few classify as parasites

  • eat plants while some eat fish and other feed from the bottom of the ocean


Species of crustacea
Species of Crustacea

  • There are many species of Crustacea known, 67000, many of these are used for human consumption


Semibalanus balanoides acorn barnacle
Semibalanusbalanoides (Acorn Barnacle)

  • Grow up to 15 mm

  • Can produce up to 10,000 eggs

  • Sessile

  • No abdomen

  • Feed using Cirri


Talitrus saltator sand hopper
Talitrussaltator (Sand Hopper)

  • Compressed laterally

  • “Beach Fleas”

  • 8.2-6.5 mm long

  • Known for hopping patterns


Homarus americanus atlantic lobster
Homarusamericanus (Atlantic Lobster)

  • 20-61 cm

  • .45-4.1 kg

  • Lives in cold shallow water

  • Same Order as crabs

  • Culinary Delicacy


Euphausia superba antarctic krill
Euphausiasuperba (Antarctic Krill)

  • Grows to 6 cm in length

  • Weigh up to 2 grams

  • Most abundant species

  • Bioluminescent


Bibliography
Bibliography

  • http://www.reefed.edu.au/home/explorer/animals/marine_invertebrates/crustaceans

  • http://www.britannica.com/EBchecked/topic/144848/crustacean/33813/Evolution-and-paleontology

  • http://whyevolutionistrue.files.wordpress.com/2010/03/cephalocarida.jpg

  • http://www.nhm.ac.uk/resources-rx/images/1017/silurian-silicified-ostracod-fossil_71605_1.jpg

  • http://www.britannica.com/EBchecked/topic/144848/crustacean/33813/Evolution-and-paleontology