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Practice Exam for Phylogeny of Spiralia | ZOOL 110, Exams of Zoology

Material Type: Exam; Class: General Zoology; Subject: Zoology; University: Fayetteville State University; Term: Unknown 1989;

Typology: Exams

Pre 2010

Uploaded on 08/19/2009

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Phylogeny of Spiralia
Annelida
Mollusca
Ectoprocta
Lophotrochozoa
Pogonophora
Eutrochozoa Lophophorata
Spiralia
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Phylogeny of Spiralia

Annelida Mollusca

Ectoprocta Lophotrochozoa

Pogonophora Eutrochozoa

Lophophorata

Spiralia

Practice Exam Essay

• Pretend that I am cookie monster andI ask you to explain the animalkingdom to me.

In a 2-3 page essay

describe the nature of the animalkingdom.

Select 4 of the following

themes and describe variations,patterns, similarities and differencesacross ALL of the phyla we havelearned.

Lophophorates

pgs. 451-

especially Ectoprocta^ (also called Bryozoa)

Phylogeny of LophotrochozoaPlatyhelminthes

Annelida Mollusca Rotifera

Ectoprocta Lophotrochozoa Pogonophora Eutrochozoa

Lophophorata

Spiralia

PhoronidaBranchiopoda

phylum Ectoproctacompare Hickman Fig. 22-

• eucoelomate• lophophorates• Sessile, marine or freshwater• colonial,individuals microscopic• > 4,000 species, abundant

Ectoprocta Anatomy

fig 22-

lophophoremouthintestineesophaguscoelom

anus

zooid

zoecium

colony

extended retracted

plantstem

Spiralia

• “Spiralia” - all protostomes with spiralclevage at the third division• Includes Lophotrochozoa, and(separately) Rotifera andPlatyhelminthes• Lophotrochozoa should be asubdivision of Spiralia, which shouldbe parallel to Ecdysozoa

Phylogeny of Spiralia

Platyhelminthes

Annelida Mollusca Rotifera

Ectoprocta Lophotrochozoa Pogonophora Eutrochozoa

Lophophorata

Spiralia

3rd

CleavageDivisioncompareCampbell p. 163

basic deuterostome pattern Spiralia pattern

Phylogeny of Spiralia

Platyhelminthes

Annelida Mollusca Rotifera

Ectoprocta Lophotrochozoa Pogonophora Eutrochozoa

Lophophorata

Spiralia

Tardigrade Characteristics Æ^ metameric appendages with claws Æ^ chitinous cuticle, shed to grow Æ^ tiny, no respiratory or circulatory organs Æ^ diecious Æ^ remarkable ability to dry out, freeze, etc.

Tardigrade Biology

Æ^ eat cell contents of mosses or algae, orprey on small animals, using stylet Æ^ ~ 800 species in moss, soil, and pond andocean sediments

Diecious SexualReproduction

previouscuticle offemale shed skin holdsfertilized eggs

Cryptobiosiscompare p. 447

• adults live in suspended animation for years– lose most of their water– thicken the cuticle– protect cells with special proteins