Does anyone know two organisms that belong to the Psilophyta phylum of the Plantae kingdom?

Answer 1

Psilophyta is not a phylum but a sub-phylum. it comes under pteridophyta. many plants in this phylum are fossils and only 4 species are living. eg: Psilotum , Rhynia

Answer 2

Psilophyta is a division of the Kingdom Plantae.

( It is not a phylum. The suffix --phyta is an indication of division.)

The name was originally applied in 1927 to a group of fossil plants from the Upper Silurian and Devonian periods, including forms such as Psilophyton and Rhynia, which lack true roots and leaves, but have a vascular system within a branching cylindrical stem. It was then extended to include two genera of living plants with a rather similar structure, Psilotum (Whisk fern) and Tmesipteris, but these are now separately classified in an order usually called Psilotales. Most paleobotanists now consider that the psilophytes are not a coherent taxonomic group, and classify them separately along with the ancestors of ferns and clubmosses. Psilophyton is a taxonomic group which currently contains 7 species known mostly from compression, impression and some permineralized anatomy. Most specimens come from Northern Maine, Gaspe Bay in Quebec, New Brunswick and the Tschech Republic. P. princeps, P. forbesii, P. dapsile, P. charientos, P. dawsonii, P. microspinosum, P. kräuselii and P. crenulatum are the currently accepted members of the genus Psilophyton. Variation within the genus is significant.

Examples are- 1) Psilotum 2) Tmesipteris and 3) Rhynia.

Pictures are below , click onthe link-

1) Psilotum nudum -
http://departments.bloomu.edu/biology/pics/botany/psilotum1.jpg
http://www2.mcdaniel.edu/Biology/botf99/earlyplants/psilhabit.jpg

2)Tmesipteris tannensis-
http://web.ujf-grenoble.fr/JAL/nz/ima-WC/pter2.jpg

http://www.ryanphotographic.com/images/JPEGS/Tmesipteris%20lateral.jpg

3) Rhynia - http://universe-review.ca/I10-22a-rhynia.jpg

I hope it is helpful enough.

Answer 3

There are two extant genera for Phylum Psilophyta: Psilotum nudum and Tmesipteris (in our specimens in the lab, we had Tmesipteris tannensis).

First things first, Psilophytes are vascular cryptogams; are fern allies. They are spore-bearing, not seed nor flower-bearing. The most notable of them is the vascularized gametophyte.


Psilotum nudum is commonly called whiskfern because of its leafless habit (psilos: slender, and nudus: naked). It means "hairs arranged on a slender stalk".
Psilophytes have no true roots and the stems are aerial and photosynthetic. Rhizomes function as roots. No true leaves occur, but sterile tongue-like appendages called enations were considered to be prophylls, the first leaf-like structures. The sporangium is triloculed and fused; a fused sporangium is called synangium. The synangia are held by a bifid sterile apparatus. The genus is homosporous, so as Tmesipteris.

Not much to say about Tmesipteris tannensis. We have it in th Philipppines. Two differences with Psilotum nudum: there are leaf-like structures and the sporangium is also fused (a synangium) but is biloculed. Another thing, if Psilotum nudum may be partly epiphytic, Tmesipteris tannensis is completely epiphytic. It is epiphytic on the giant tree fern, Cyathium; and is becoming endangered due to that the caudex of the giant tree fern is in demand as orchid posts. Think about it. If you destroy the plant's habitat, not only the tree fern is destroyed, but many you are not even aware of.

Let's all consider it.

Anyway, hope I helped. :-)

Answer 4

Go to your favorite search engine and type in psilophyta. Save your 5 points for something you don't understand.

Answer 5

Psilophyta

Answer 6

Slipper foot worm or amoeba a protozoa, and the flat worm.