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- Callistophytales abstract "The Callistophytales was an order of mainly scrambling and lianescent plants found in the wetland "coal swamps" of Euramerica and Cathaysia. They were characterised by having bilaterally-symmetrical, non-cupulate ovules attached to the underside of pinnules that were morphologically similar to the "normal" vegetative pinnules; and small compound pollen-organs, also borne on the underside of unmodified pinnules, that produced saccate pollen. They were reproductively more sophisticated than most other Palaeozoic pteridosperms, some of which they seem to have out-competed and replaced in the "coal swamp" vegetation during Late Pennsylvanian and Permian times.The inclusion of the Callistophytales within the Lyginopteridopsida is controversial because of the apparent sophistication of the ovules and pollen. There are nevertheless many other characters that suggest that the Callistophytales may have been derived from a more primitive lyginopterdalean-like ancestor, including the presence of a lagenostome at the apex of the nucellus, the general structure of the pollen organs, and the overall morphology of the vegetative structures.Two families have been recognised: the Callistophytaceae, known mainly from the Carboniferous floras of Euramnerica; and the Emplectopteridaceae, known mainly from the Permian floras of China and adjacent areas.".
- Callistophytales wikiPageID "27683501".
- Callistophytales wikiPageRevisionID "598951681".
- Callistophytales displayChildren "1".
- Callistophytales hasPhotoCollection Callistophytales.
- Callistophytales oldestFossil "Carboniferous".
- Callistophytales youngestFossil "Permian".
- Callistophytales subject Category:Cycads.
- Callistophytales subject Category:Prehistoric_plants.
- Callistophytales type Cycad111600372.
- Callistophytales type Cycads.
- Callistophytales type Gymnosperm111596108.
- Callistophytales type LivingThing100004258.
- Callistophytales type Object100002684.
- Callistophytales type Organism100004475.
- Callistophytales type PhysicalEntity100001930.
- Callistophytales type Plant100017222.
- Callistophytales type Spermatophyte111552386.
- Callistophytales type VascularPlant113083586.
- Callistophytales type Whole100003553.
- Callistophytales comment "The Callistophytales was an order of mainly scrambling and lianescent plants found in the wetland "coal swamps" of Euramerica and Cathaysia. They were characterised by having bilaterally-symmetrical, non-cupulate ovules attached to the underside of pinnules that were morphologically similar to the "normal" vegetative pinnules; and small compound pollen-organs, also borne on the underside of unmodified pinnules, that produced saccate pollen.".
- Callistophytales label "Callistophytales".
- Callistophytales label "Callistophytales".
- Callistophytales sameAs Callistophytales.
- Callistophytales sameAs m.0c3_y03.
- Callistophytales sameAs Q1027330.
- Callistophytales sameAs Q1027330.
- Callistophytales sameAs Callistophytales.
- Callistophytales wasDerivedFrom Callistophytales?oldid=598951681.
- Callistophytales isPrimaryTopicOf Callistophytales.