Term
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Definition
Phylum Echinodermata
Class Asteroidea
Larva - note the bilateral symmetry of this echinoderm larva |
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Definition
Phylum Echinodermata
Class Asteroidea
These large sea star tubefeet are extensions of the water vascular system. Sea stars use their tube feet to move, cling to surfaces, and capture prey. |
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Term
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Definition
Phylum Echinodermata
Class Asteroidea |
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Term
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Definition
Phylum Echinodermata
Class Asteroidea |
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Term
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Definition
Phylum Echinodermata
Class Ophiuroidea
basket star |
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Term
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Definition
Phylum Echinodermata:
Class Ophiuroidea;
basket star |
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Term
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Definition
| Phylum Echinodermata; Class Echinoidea: sea urchin |
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Term
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Definition
| Phylum Echinodermata; Class Echinoidea: sea urchin |
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Term
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Definition
| Phylum Echinodermata; Class Echinoidea: sanddollar |
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Definition
| Phylum Echinodermata; Class Holothuroidea: Sea cucumbers are aberrant echinoderms which are greatly elongated along their oral-aboral axis and are laying over on one side. |
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Term
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Definition
| Phylum Echinodermata; Class Holothuroidea: sea cucumber |
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Term
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Definition
| Phylum Chordata; Subphylum Urochordata: Although tunicates (sea squirts) look a lot like sponges, they are actually chordates. This is because the larval form possesses the three definitive chordate characters - notochord, dorsal hollow nerve cord, and pharyngeal gill slits. |
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Definition
| Phylum Chordata; Subphylum Craniata; Class Myxini: Hagfish are jawless fishes that live on the ocean floor, consuming detritus and dead animals the sink to the ocean floor. |
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Term
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Definition
| Phylum Chordata; Subphylum Craniata; Class Cephalaspidomorphi: Petromyzon (lamprey). These jawless fishes live in the ocean as adults, but return to the rivers to reproduce |
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Term
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Definition
| Phylum Chordata; SP Craniata; Class Cephalaspidomorphi: Ammocoetes are larval lampreys. A good portion of the lamprey lifespan (3 to 4 years) is spent as a filter-feeding ammocoete, living in an underwater burrow. Ammocoetes look similar to lancelets, although they are in a different SUBPHYLUM. |
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Term
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Definition
| Phylum Chordata; Subphylum Craniata; Class Chondrichthyes |
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Term
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Definition
| Phylum Chordata; Subphylum Cranita; Class Chondrichthyes |
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Term
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Definition
| Phylum Chordata; Subphylum Cephalochordata |
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Term
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Definition
| Phylum Chordata; Subphylum Cephalochordata |
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Term
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Definition
| Phylum Chordata; Subphylum Cephalochordata |
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Term
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Definition
| Phylum Chordata; Subphylum Cephalochordata |
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Term
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Definition
| Phylum Chordata; Subphylum Cephalochordata: Amphioxus pharynx cross-section. Note the liver, gonads, notochord, nerve cord, endostyle, and myotomes (muscle segments). |
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Term
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Definition
| Phylum Chordata; Subphylum Cephalochordata |
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Term
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Definition
| Phylum Chordata; Subphylum Cephalochordata |
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Term
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Definition
| Phylum Chordata; Subphylum Cephalochordata |
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Term
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Definition
P Chordata; SP Craniata C Dipnoi
There are three genera of lungfish - one each in Australia, South America and Africa. These fish all have well developed lungs and can gulp air for respiration. This is advantageous during prolonged periods of drought when these fish may be confined to secreted cocoons in drying mud. Lungfish also have gills similar to those of other fish. The Australian species relies mostly on its gills for respiration. |
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Term
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Definition
Phylum Chordata SP Craniata C Actinista:
Some primitive fish, such as the coelocanth shown, have fleshy fins. These gave rise to the legs of the first terrestrial vertebrates while the gas bladders increasingly specialized as internal lungs. |
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Term
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Definition
P Chordata SP Craniata C Amphibia
Amphibians were the first vertebrates to venture forth onto land. They include the frogs, toads, salamanders, sirens, and worm-like animals called caecilians. Important terrestrial adaptations include lungs and legs but amphibians are still closely tied to the aquatic environment, primarily because their skin is moist and glandular and subject to drying out, and the eggs of most species must be laid in the water. Respiration is by lungs, gills, through the skin or the lining of the mouth. The heart has three chambers, two atria and a single ventricle. |
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Term
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Definition
| P Chordata SP Craniata C Amphibia |
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Term
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Definition
| P Chordata SP Craniata C Amphibia |
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Term
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Definition
| P Chordata SP Craniata C Reptilia SC Crocodylia |
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Term
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Definition
| P Chordata SP Craniata C Reptilia SC Lepidosauria |
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Term
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Definition
| P Chordata SP Craniata C Repitilia SC Lepidosauria |
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Term
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Definition
| P Chordata SP Craniata C Reptilia SC Testudine |
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Term
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Definition
| P Chordata SP Craniata C Reptilia SC Aves |
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Term
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Definition
| P Chordata SP Craniata C Reptilia SC Aves |
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Term
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Definition
| P Chordata SP Craniata C Mammalia |
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Term
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Definition
| P Chordata SP Craniata C Mammalia |
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