Lab 7 - Tunicates and Cephalochordates - EVERYBODY IS PHYLUM CHORDATA

What are five characteristics that set chordates apart from all other animal groups?

A notochord, a dorsal hollow nerve cord, pharyngeal gill slits, postanal tail, An endostyle or thyroid gland

What is the phylum and subphylum of this specimen?

Phylum Chordata and Subphylum Urochordata (or Tunicates)

What are the names of these specimen?

Molgula - sea squirt

What is the feeding method of tunicates

They are filter-feeding animals - They pull water into the pharynx and particles are filtered out by the pharyngeal slits

What is the Phylum and Subphylum of this specimen

phylum chordata - subphylum Urochordata (Tunicates)

What is the name of this specimen?

Ecteinascidia

What is the phylum and subphylum of this specimen

Phylum Chordata - Subphylum Cephalochordata

What is the name of this specimen

lancelets or amphioxus (Branchiostoma)

What is the phylum and subphylum of this specimen

Phylum Chordata - Subphylum Cephalochordata

What is this specimen

Lancelets - Branchiostoma

What phylum, subphylum, and class do jawless fish belong to?

Phylum Chordata, subphylum Vertebrata, class Petromyzontida

What are the names of the fish in class petromycontida?

Lampreys

What is the feeding method of most species of lampreys?

Most are ectoparasites - they feed on the blood of other fish

What is the phylum, subphylum, and class of cartilaginous fish?

Phylum Chordata, subphylum Vertebrata, class Chondrichthyes

What is the function of the spiracles? - Dog fish shark (Squalus)

Modified gill slits allowing water to be drawn into the pharynx and across the gills

What is the function of the lateral line system? - Dog fish shark (Squalus)

Allows them to sense low frequency vibrations

What phylum, subphylum and class to ray-finned fish belong to?

Phylum Chordata, Subphylum Vertebrata, Class Actinopterygii

What is the 411 on this animal

Phylum Chordata, Subphylum Vertebrata , Class Actinopterygii, Ray-finned fish - sea horse

What is the 411 on this specimen

Phylum Chordata, Subphylum Vertebrata , Class Actinopterygii, Ray-finned fish - flounder

opercula are absent in cartilaginous and jawless fishes and represent an evolutionary advancement seen in bony fish. how do opercula allow a bony fish to pass water over its gills while the fish remains stationary? why would this be viewed as an adaptation?

flexing the operculum with their mouth open draws water over their gills; adapting to a more stationary lifestyle

the swim bladder is another evolutionary advancement in bony fish. what advantages do fish with swim bladders have?

Fish do not have to keep moving and they can keep their depth/ buoyancy