Lab 7 Study Guide: Eukaryotic Supergroup Opisthokonta

A comprehensive set of flashcards covering the major concepts, classifications, and characteristics of organisms in the Eukaryotic supergroup Opisthokonta.

Bilateral symmetry

A body plan in which the left and right sides of an organism are mirror images.

Diploblastic

An organism with two embryonic tissue layers: ectoderm and endoderm.

Triploblastic

An organism with three embryonic tissue layers: ectoderm, mesoderm, and endoderm.

Protostomes

Organisms where the mouth develops first from the blastopore.

Deuterostomes

Organisms where the anus develops first from the blastopore.

Eucoelomate

An organism with a true coelom completely lined with mesoderm.

Pseudocoelomate

An organism with a coelom that is partially lined with mesoderm.

Acoelomate

An organism that lacks a coelom, filled instead with mesoderm.

Lophotrochozoans

A group of triploblastic, bilateral protostomes that grow by increasing body mass.

Phylum Platyhelminthes

Acoelomate animals with an incomplete digestive tract, including flatworms.

Class Turbellaria

Free-living flatworms like planarians that are usually aquatic predators.

Class Trematoda

Parasitic flukes that have oral and ventral suckers.

Class Cestoda

Tapeworms that are endoparasites found in the intestinal tract.

Phylum Mollusca

Eucoelomates with a complete digestive tract and an open circulatory system.

Class Gastropoda

Mollusks like snails and slugs that may have a spiral shell.

Class Bivalvia

Mollusks like clams and oysters characterized by shells with two halves.

Class Cephalopoda

Mollusks like squids and octopuses that have complex eyes and a closed circulatory system.

Phylum Annelida

Segmented worms with a closed circulatory system and complete digestive tract.

Class Polychaeta

Annelids with many bristle-like setae and including free-moving predatory forms.

Class Oligochaeta

Earthworms that are part of the clade Clitellata and have setae.

Class Hirudinea

Leeches, characterized by the absence of setae and the presence of suckers.