BSC 2010LBSC 2010L

INVERTEBRATES IIINVERTEBRATES II

Principal Biological Concepts to Principal Biological Concepts to Emphasize:Emphasize:

A. A. Protostome vs. deuterostome.Protostome vs. deuterostome.B. B. Extremely diverse groups.Extremely diverse groups.C. C. Terrestrial adaptations of Arthropods.Terrestrial adaptations of Arthropods.D. D. Serial homology.Serial homology.E. E. Evolution of flight.Evolution of flight.F. F. Metamorphosis.Metamorphosis.G. G. Detailed anatomy of the crayfish.Detailed anatomy of the crayfish.

Protostome vs. deuterostome.Protostome vs. deuterostome.

A.A. Mollusks and arthropods, as well as the Mollusks and arthropods, as well as the Annelids we looked at last week, are Annelids we looked at last week, are protostomes.protostomes.

1.1. Spiral and determinate cleavageSpiral and determinate cleavage2.2. Blastopore (opening of the archenteron) becomes Blastopore (opening of the archenteron) becomes

the mouththe mouth3.3. Schizocoelous formation of the coelomSchizocoelous formation of the coelom

B.B. We will look at deuterostome phyla next We will look at deuterostome phyla next week (Echinodermata and Chordata)week (Echinodermata and Chordata)

1.1. Radial and indeterminate cleavageRadial and indeterminate cleavage2.2. Blastopore forms anusBlastopore forms anus3.3. Enterocoelous formation of coelomEnterocoelous formation of coelom

Early embryonic developmentEarly embryonic development

Early development in protostomes and deuterostomesEarly development in protostomes and deuterostomes

Phylum MOLLUSCAPhylum MOLLUSCA

1.1. Class Class Polyplacophora - chitonsPolyplacophora - chitons

2.2. Class Class Gastropoda - snails, slugsGastropoda - snails, slugs

3.3. Class Class Bivalvia - bivalvesBivalvia - bivalves

4.4. Class Class Cephalopoda - octupus, squidsCephalopoda - octupus, squids

Basic body plan of mollusksBasic body plan of mollusks

A chitonA chiton

Garden snailGarden snail

The results of torsion in a gastropodThe results of torsion in a gastropod

Gastropods: Nudibranchs (top left and bottom left), terrestrial snail (bottom left), deer cowrie (bottom right)Gastropods: Nudibranchs (top left and bottom left), terrestrial snail (bottom left), deer cowrie (bottom right)

A bivalve: ScallopA bivalve: Scallop

Anatomy of a clamAnatomy of a clam

Cephalopods: Squid (top left and bottom left), nautilus (top right), octopus (bottom right)Cephalopods: Squid (top left and bottom left), nautilus (top right), octopus (bottom right)

Mussel heart xsecMussel heart xsec

prepared (no. 11-1)prepared (no. 11-1)

Phylum ARTHROPODAPhylum ARTHROPODA

1.1. Subphylum ChelicerataSubphylum Chelicerataa.a. class Merostomata - horseshoe crabsclass Merostomata - horseshoe crabsb.b. class Arachnida - spiders, ticks, scorpionsclass Arachnida - spiders, ticks, scorpions

2.2. Subphylum CrustaceaSubphylum Crustaceaa.a. class Crustacea - aquatic arthropods - shrimp, class Crustacea - aquatic arthropods - shrimp,

lobsters, crabs, crayfishlobsters, crabs, crayfish

3.3. Subphylum UniramiaSubphylum Uniramiaa.a. class Insecta - flightclass Insecta - flightb.b. class Chilopoda - centipedesclass Chilopoda - centipedesc.c. class Diplopoda - millipedesclass Diplopoda - millipedes

Lycosid spiderLycosid spider

Arachnids. Scorpion (left), parasitic mites inhabiting tracheae of honeybee (right)Arachnids. Scorpion (left), parasitic mites inhabiting tracheae of honeybee (right)

Horseshoe crabs, Horseshoe crabs, Limulus polyphemusLimulus polyphemus

External anatomy of an arthropodExternal anatomy of an arthropod

Insecta: beetleInsecta: beetle

Insect flight, dragonflyInsect flight, dragonfly

Metamorphosis of a butterflyMetamorphosis of a butterfly

Class Dipolopoda (millipedes)Class Dipolopoda (millipedes)

Malpighian tubules of insectsMalpighian tubules of insects

Insect Malpighian tubulesInsect Malpighian tubules

prepared (no. 11-2)prepared (no. 11-2)

Insect tracheaeInsect tracheae

prepared (no. 11-3)prepared (no. 11-3)

Spider anatomySpider anatomy

Grasshopper external anatomy and Grasshopper external anatomy and mouthpartsmouthparts

Anatomy of a grasshopper, an insectAnatomy of a grasshopper, an insect

Crayfish dissectionCrayfish dissection

A. A. WORK WORK IN PAIRSIN PAIRS..

B. B. Photosheets are posted in lab.Photosheets are posted in lab.

C. C. Dispose of crayfish in metal barrels in Dispose of crayfish in metal barrels in back of roomback of room..

Insect identification - slides and Insect identification - slides and dichotomous key. dichotomous key.

A.A. You must identify five (5) insect orders You must identify five (5) insect orders B.B. Hand this in before leaving lab as data sheet 2 Hand this in before leaving lab as data sheet 2

(DS2 - 5 pts.) (DS2 - 5 pts.) 1.1. NameName2.2. Slide box numberSlide box number3.3. Slide number, insect order for each of 5 slides.Slide number, insect order for each of 5 slides.

C.C. Key to insect ordersKey to insect ordersD.D. Don't share slide boxes.Don't share slide boxes.E.E. For lab practical - Don't need to know orders or the For lab practical - Don't need to know orders or the

structures used in the key.structures used in the key.

A

B

CD

E

cerci

haltere

elytra

setae

cornicles

furcula

F

G

H

I

Suggest you view “Suggest you view “33A 33A Characteristics of InvertebratesCharacteristics of Invertebrates” ”

on on Student Media CD-ROMStudent Media CD-ROM for for review.review.

Lab practical in three weeks.Lab practical in three weeks.

A.A. Sign up sheets available on-line beginning Sign up sheets available on-line beginning Monday, October 10.Monday, October 10.

B.B. Review lab sessions - Saturday October 15 and Review lab sessions - Saturday October 15 and Sunday October 16.Sunday October 16.

C.C. Practical exams - Monday October 17 through Practical exams - Monday October 17 through Wednesday October 19.Wednesday October 19.

D.D. 30 stations30 stationsE.E. 1 question per station1 question per stationF.F. 60 seconds per station60 seconds per stationG.G. NO GOING BACKNO GOING BACKH.H. Practical covers labs Practical covers labs 1, 4, 51, 4, 5 and and 77, in roughly equal , in roughly equal

proportions.proportions.