3454lablecture6 - Sessile, shell made totally of calcium...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
PHYLUM ARTHROPODA SUBPHYLUM CRUSTACEA Mostly aquatic, some terrestrial Economically important – part of zooplankton food web, barnacles, food 3 body regions – head, thorax, and abdomen Stalked compound eyes Biramous limbs – outer part=exopodite, inner part=endopodite, used to walk, swim, feed, fight, respire, clean gills, etc. Book gills Two antennae Chitinous exoskeleton with calcium carbonate is very tough Variable degrees of tagmatization and variable mouthparts Mandibles, maxillae, and maxillipeds CLASS BRANCHIOPODA Filter feeders, planktonic ORDER ANOSTRACA Fairy shrimp, no abdominal limbs Carapace like a shell Nauplius larval stage ORDER CLADOCERA ( DAPHNIA) Bivalve, 2 nd pair of antennae used for swimming
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
CLASS MAXILLOPODA ORDER COPEPODA (COPEPODS) Dorsally flattened as opposed to laterally flattened Use 1 st pair of antennae to swim Nauplius eye – single, noncompound eye ORDER OSTRACODA (OSTRACODS) Bivalve, benthic animals Use 1 st pair of antennae to swim ORDER CIRRIPEDIA (BARNACLES)
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Sessile, shell made totally of calcium carbonate Planktonic larvae Filter feeders Largest penis/body size ratio in animal kingdom CLASS MALACOSTRACA Advanced crustaceans Ancestrally, have 19 body segments with a pair of limbs on each segment ORDER ISOPODA Isopods (rolly pollies), terrestrial crustaceans ORDER AMPHIPODA Some terrestrial, most aquatic Have ancestral 19 segments with 19 pairs of limbs No larval stage, brood eggs ORDER DECAPODA (LOBSTERS, SHRIMP, CRAYFISH, CRABS) Many larval stages Chelipeds (pincers) even in shrimp Boxing shrimp that kills with chelipeds Variable levels of tagmatization OMISSIONS Ex. 2 no nauplius larvae, instead observe live isopod Ex. 13 just draw limbs in lab book, dont tape to page. Draw on the page and tape the mouthparts to a paper towel On table, big barnacle=stalk barnacle, small barnacle=goose barnacle, acorn barnacles on display table...
View Full Document

This note was uploaded on 11/29/2009 for the course BIOLOGY 3454 taught by Professor Nelson during the Spring '09 term at UT Arlington.

Page1 / 3

3454lablecture6 - Sessile, shell made totally of calcium...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online