Review of Phyla Gastrotricha, Dicyemida, and Chaetognatha

These flashcards cover key concepts and facts about the phyla Gastrotricha, Dicyemida, and Chaetognatha learned in the lecture.

What is the defining characteristic of Phylum Gastrotricha?

Adhesive tubes.

How many species are there in Phylum Dicyemida?

65 species.

What type of reproduction do Dicyemida exhibit?

Both sexual and asexual reproduction.

What is the primary habitat for organisms in the Phylum Chaetognatha?

Marine environments.

What are the defining characteristics of Chaetognatha?

Grasping spines and a single caudal fin.

Describe the body organization of Gastrotricha.

Elongate flattened body with a forked tail or 'toes'.

What type of development occurs in Dicyemida?

Asexual development through nematogens.

What is a unique feature of the nervous system in Chaetognatha?

Large cerebral ganglion.

What type of muscles do Chaetognatha possess?

Four bands of longitudinal muscle.

How do Gastrotricha reproduce?

Hermaphrodites or through parthenogenesis.