Animals IV Flashcards
The Deuterostomes can be divided into two main groups. What is the name of these?
Ambulacrarians and Chordates
Echinoderms (Starfish) are sister to _____________
Hemichordates
Radial symmetry is unique to what Deuterostome group?
Echinoderms
What 3 characters are unique to Chordates?
Notochord, dorsal hollow nerve cord, post anal tail
What characters are unique to Vertebrates
Ventral chord
T/F Deuterostomes are coelmate
True
Earliest Deuterostomes date back to the __________
Cambrian, 520 mya
T/F Hemichordates belong in the Chordate group
False
T/F Hemichordates have bilateral symmetry
True
T/F Sea urchins are Echinoderms
True!
Name the 5 Echinoderm clades
Asteroidea (Sea stars), Ophi (Brittle stars), Echinodea (urchins), Crinoidea (Lilies), Holothuroidea (Sea Cucumbers).
ALWAYS OBLITERATE EVERY CUTE HAMSTER!
Echinoderm larvae are ___________ symmetrical
bilaterally
Echinoderms have a endo/exo derm
endoderm
T/F there are hermaphroditic starfish
True
What kind of vascular system do Echinoderms have?
Water vascular system
Name the structure that allows Echinoderms to grasp prey and move?
Tube feet
Chordates date back to the _______________ era
Cambrian
All Chordates have these 5 characters
- Notochord 2. Postnatal tail 3. Pharyngeal slits 4. Dorsal neve chord 5. Endostyle
NO PEEING PEOPLE DURING EVENTS
Name the 3 Chordate groups
Cephalochordates (Lancelets), Urochordates (Tunicates) and Vertebrates
Vertebrates can be broken into two groups called ?
Jawless fishes (Hagfish and Lampreys) and Gnathostomes (jaw mouths, everything else)
Name the 4 characteristics of vertebrates
Anterior skull with brain, rigid endoskeleton (bony or cartilaginous, well developed closed circulatory system driven by heart, and coelom w suspended organs
The teeth of cartilaginous fish are called
conodonts
Jaws are presumed to have developed from this structure in fish
gill arches
What group of fish are more closely related to tetrapods?
lungfish
