Dictionary » P » Phylum



noun, plural: phyla or phylums

(1) A taxonomic rank at the level below Kingdom and above Class in biological classification, especially of animals.

(2) A group of Classes with similar distinctive characteristics.


Examples: Class Mammalia (mammals), Class Aves (birds) and Class Ascidiacea (sea squirts) all belong to Chordate Phylum, which is a group of animals that have notochords at some time in their life cycle. Aside from Chordata, other well known phyla are the Mollusca, Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Arthropoda and Echinodermata, which all belong to Kingdom Animalia.

Word origin: New Latin ph[ymacr]lum, from Greek phūlon, class.

Compare: division.
See also: taxonomy.

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Bacterial Taxonomy

... Firmicutes, and Actinobacteria If a bacteria stains as Gram-positive, it is probably a member of Firmicutes, Actinobacteria, or a deeply branching phylum. Virtually all members of Firmicutes or Actinobacteria stain as Gram-positive , but genus Veillonella is an exception, staining as Gram-negative ...

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by wildfunguy
Sat Oct 19, 2013 6:12 pm
Forum: Microbiology
Topic: Bacterial Taxonomy
Replies: 3
Views: 1530

Help with indentifying object - can't narrow to even kingdom

... They also might be ootheca? I apologize in advance if I've come to the wrong board to post this question. Could it be this? Kingdom Bacteria Phylum Cyanobacteria Class Cyanophyceae Family Nostocaceae Genus Anabaena <br> http://i32.photobucket.com/albums/d6/Sadial/Blob9.jpg ...

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by Sadial
Sun Jun 30, 2013 4:50 pm
Forum: General Discussion
Topic: Help with indentifying object - can't narrow to even kingdom
Replies: 2
Views: 1711

Re: [Help!!!] Respiratory systems of all animals phylum.

Hi The question is a bit badly worded but it appears to be asking you to name and describe as many different kinds of respiratory systems as you can think of. For instance, how do insects breathe?

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by animartco
Mon Jun 03, 2013 2:50 pm
Forum: Zoology Discussion
Topic: [Help!!!] Respiratory systems of all animals phylum.
Replies: 8
Views: 2057

[Help!!!] Respiratory systems of all animals phylum.

Hi, I can't answers this question: " compare and contrast respiratory systems of all animals phylum " Please help me. Thank you so much.

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by khainguyen97
Tue May 21, 2013 10:11 pm
Forum: Zoology Discussion
Topic: [Help!!!] Respiratory systems of all animals phylum.
Replies: 8
Views: 2057

Please check my work?

... there are two possible right answers. The second one is a. The third question makes no sense, since they do lack "a" but that's not a phylum characteristic. Your answer is probably what they want, though. On the last one, don't ignore the word "adult."

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by Darby
Sun Jun 17, 2012 1:03 am
Forum: General Discussion
Topic: Please check my work?
Replies: 1
Views: 2278
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