phylum arthropoda subphylum crustacea
TRANSCRIPT
LABORATORIO
Phylum Arthropoda Subphylum CRUSTACEA
EJERCICIO 14
Goals for today
• Learn to recognized the Phylum ARTHROPODA from other animals
• Learn the main ‘diagnos>c’ characteris>cs of both the phylum and subphylum CRUSTACEA
• Learn about some species biology
Phylum Arthropoda Arthropods with tardigrades and onychophores belong to the clade Ecdysozoa Key characterisCcs of the phylum: • Coelomates • Triploblas>c • Bilateral symmetry • Cephaliza>on • Protostomates • Metamerism= fusion of segments into tagmata • Belong to phylogene>c clade: Ecdysozoa
– Ecdysis • Complete diges>ve system • Joined appendages • Exoskeleton or cu>cle of chi>n • Efficient tracheal system • Hemolymph
Subfilum Crustacea Crustaceans includes crabs, shrimps, lobsters, etc
Key characterisCcs of the phylum: * Head (cephalon) with 5 pairs of appendages; including 2 pairs of antennae * Trunk usually divided into thorax and abdomen * Appendages mostly biramous * Have compound eyes (oQen on stalks) and ocelli * Predominantly marine; some fresh water or terrestrial * Unique nauplius larva * Taxonomic note: Crustacea is likely paraphyle>c
Crustacea: Your Tasks Exercise 14:
– Phylum:Arthropoda Subphylum Crustacea • Clase Malacostraca, Orden Decapoda
• Genus: Cambarus (Crayfish lobster)
Crayfish are found in freshwater streams and ponds worldwide. Are omnivorous. Introduced crayfish are known to harm biological communities.
* Shrimp, crabs, lobsters, crayfish * One pair of anterior clawed appendages * Carapace well developed * Marine, freshwater, and terrestrial (few)
Crustacea: Crayfish 1. Observe anatomia externa
How do these animals grow? How many tagmata can you recognize?
Crustacea: Crayfish 1. Observe anatomia externa
Use figure 14.5 to distinguish some of the appendages
Crustacea: crabs Exercise 14:
– Phylum:Arthropoda Subphylum Crustacea • Clase Malacostraca, Orden Decapoda
• Crabs
*
Male female
1. Diseccion: observe la anatomia interna, recuerde que su diseccion es evaluada por su instructor. Haga un buen trabajo.
Crustacea Exercise 14:
– Phylum:Arthropoda Subphylum Crustacea • Clase Malacostraca, Orden Amphipoda
• Genus: Gammarus
* Scuds * Carapace absent * Laterally compressed * Humpbacked appearance * Marine and fresh water (some semiterrestrial)
1. Diseccion: observe la anatomia interna, recuerde que su diseccion es evaluada por su instructor. Haga un buen trabajo.
Crustacea: Brine shrimps Exercise 14:
– Phylum:Arthropoda Subphylum Crustacea • Clase Branchiopoda, Orden Anostraca
• Genus: Artemia
* Fairy & brine shrimp * Numerous (up to 19) swimming appendages * Lack a carapace * Many in hypersaline environments or vernal pools
1. Diseccion: observe la anatomia interna, recuerde que su diseccion es evaluada por su instructor. Haga un buen trabajo.
Crustacea: fairy shrimp Exercise 14:
– Phylum:Arthropoda Subphylum Crustacea • Clase Branchiopoda, Orden Anostraca
• Genus: Eubranchipus
1. Diseccion: observe la anatomia interna, recuerde que su diseccion es evaluada por su instructor. Haga un buen trabajo.
Crustacea: water fleas Exercise 14:
– Phylum:Arthropoda Subphylum Crustacea • Clase Branchiopoda, Orden Cladocera
• Genus: Daphnia
* Water Fleas * Large folded carapace is not hinged * Body segmentation reduced * Use enlarged antennae for locomotion * Large central compound eye
1. Diseccion: observe la anatomia interna, recuerde que su diseccion es evaluada por su instructor. Haga un buen trabajo.
Crustacea Exercise 14:
– Phylum:Arthropoda Subphylum Crustacea • Clase Maxillopoda, Orden Ostracoda
• Genus: Cypris‐Ostracodo
* Almost completely enclosed within hinged, bivalved carapace * Overall seed or bean-shaped appearance * No more than 2 pairs of post-cephalic appendages * Most are tiny (<2 mm)
1. Diseccion: observe la anatomia interna, recuerde que su diseccion es evaluada por su instructor. Haga un buen trabajo.
Crustacea Exercise 14:
– Phylum:Arthropoda Subphylum Crustacea • Clase Maxillopoda, Orden Copepoda
• Genus: Cyclops
* Lack carapace, but have cephalic shield * Small (<2 mm) * Single median eye * 6 thoracic and 5 abdominal segments * No abdominal appendages or gills * Mostly marine, planktonic drifters
1. Diseccion: observe la anatomia interna, recuerde que su diseccion es evaluada por su instructor. Haga un buen trabajo.
Crustacea Exercise 14:
– Phylum:Arthropoda Subphylum Crustacea • Clase Maxillopoda, Orden Cirripedia
* Sessile; attach to various surfaces as adults * Attach with ventral surface up * Most secrete thick calcium carbonate shell * Head reduced; abdomen absent * Thoracic legs modified for suspension feeding (cirri) * Some species are parasitic
http://wwwbio200.nsm.buffalo.edu/labs/tutor/Crayfish/
nauplius
Megalops-crab
zoea