LABORATORIO: Parte 2 Filo Poriferazoology-uprrp.weebly.com/uploads/6/6/8/0/6680387/lab1_part1... · LABORATORIO: Parte 2 Filo Porifera ... Cnidaria and a Parazoa ...

LABORATORIO:Parte2

FiloPoriferaEJERCICIO7113‐120(EDITION14TH)

109‐119(EDITION15TH)

Goalsfortoday

•  LearntorecognizedthePhylumPoriferafromotheranimals

•  Learnthemain‘diagnosLc’characterisLcs

•  Learnaboutsomespongesbiology

Porifera

Thesearethesimplestmetazoans

•  LiPleornoLssueorganizaLon

•  SaidtobelongtothecellularleveloforganizaLon.

•  Noorgans,nosystems,nomouth,ordigesLvetract,onlyrudimentarynervousintegraLons.

•  Nogermlayers(soneitherdiploortriploblasLc)

•  Somehavesymmetrysomedon’t

Porifera

Parazoa

Radiata

Deu

terostom

ia

Ecdysozoa

Loph

otrochozoa

Eumetazoa

Bilateria

Protostomia

Cnidariaand

Cten

opho

ra

Parazoa

Ancestralcolonialchoanoflagellate

Porifera

Maincharacteris@csofspongesare:

•  Poresandcanalsystems(asconoid,siconoid,andleuconoid)

•  Flagellatedspongefeedingcells=choanocytes.

•  Internalskeletonsofspiculesororganicfibers(spongin).

•  Internalcavity=spongocoelthatopenstoanosculum

Porifera

•  Mostaremarine

•  Freshwaterspeciesarefoundinpondsandstreams

•  Solitaryorcolonial•  Adultsaresessile

Porifera:Classifica@on

Calcarea:

•  Spiculesofcalciumcarbonate

•  Needle‐shapedor3‐4rayedspicules•  Canalsystemsasconoid,siconoid,or

leuconoid

•  Allmarine

Asconoide Siconoide Leuconoide

Classes:

Hexac@nellida:

•  3D,six‐rayedspicules

•  Siliceousspiculesforminganetwork•  Bodyo_encylindricalorfunnel‐shaped.

•  Canalsystemssiconoidorleuconoid

•  Allmarine,andmostdeepwaterspp.

Demospongiae:

•  Siliceousspicules(notsix‐rayed),sponginorboth

•  Canalsystemsleuconoid

•  Onefamilyfreshwater,mostmarine

•  Mostspongesbelongtothisclass

Porifera:YourTasksExercise7:

–  Phylum:Porifera(sponges)– ClassCalcarea

•  Genus:Sycon(=Scypha,Gran3a)

Sycon has a syconoid canal system Marine

Porifera:Sycon

1.  PutapreservedSyconinapetridishforyoutotakealookattheshape,osculum,andspicules.ThereisalsoamodelofSycon,learnaboutitsparts

Porifera:Sycon2.Takeaslidefromyourboxwith(Sycon,GranLa,or

Scypha)thisisacrosssecLoncut:idenLfytheincurrentcanal,spongocoel,andtheradialcanal

Water enters the incurrent canals and passes through minute openings called? ____________

Check your book for answers!

Porifera:Sycon2.Takeaslidefromyourboxwith(Sycon,GranLa,or

Scypha)thisisacrosssecLoncut:idenLfytheincurrentcanal,spongocoel,andtheradialcanal

What is the apopyle? Check your book!

Porifera:Sycon3.Takeaslidefromyourboxwith(Sycon,GranLa,orScypha)

inalongitudianalcrosssecLonyouwouldseethefollowingspecializedcells:whataretheirfunc@on?

Porifera:YourTasksExercise7:

–  Phylum:Porifera(sponges)– ClassCalcarea

•  Genus:Leucosolenia

Leucosolenia has an asconoide canal system

Porifera:Leucosolenia

1.  Trytofindtheosculum.Thisisacolonialspeciesoftubularindividualsinvariousstagesofdevelopment

osculum

Porifera:Leucosolenia

2.LookinthemicroaslideofLeucosoleniabodyanditsspicules

Porifera:YourTasksExercise7:

–  Phylum:Porifera(sponges)– ClassHexac@nellida

•  Genus:Euplectella

Porifera:YourTasks

Some species of Euplectella have a commensal relationship with a shrimp species. A young male and female shrimp enter the central cavity and live there. As they grow they become too large to escape through the sieve-like covering of the osulum, and so spend their entire life inside the sponge.

1.LookatpreservedspecimensofEuplectella

Porifera:YourTasksExercise7:

–  Phylum:Porifera(sponges)– ClassDemonspongiae

•  Gemmulas(asexualreproduc3vestructures)

Gemmules are asexual reproductive structures of freshwater sponges and some marine sponges of the class Demonspogiae

What is their function in reproduction?

ImportantLinksPorifera

http://bioweb.uwlax.edu/zoolab/Table-Of-Contents.htm

http://faculty.uml.edu/rhochberg/hochberglab/Courses/InvertZool/Quizes/Porifera%20Quiz%201.html

http://www.bumblebee.org/invertebrates/Porifera.htm