Tomiostrobus on:
[Wikipedia]
[Google]
[Amazon]
''Tomiostrobus'' is an extinct quillwort genus from the Early Triassic of Australia, China and Russia, which was especially widespread in the aftermath of 
Permian Triassic
The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleozo ...
mass extinctions.
Description
''Tomiostrobus australis'' is preserved as whole plants closely spaced within bedding planes, and lived as an early successional weed in lake and pond sedimentary environments, like living ''Isoetes
''Isoetes'', commonly known as the quillworts, is the only extant genus of plants in the family Isoetaceae, which is in the class of lycopods. There are currently 192 recognized species, with a cosmopolitan distribution but with the individual sp ...
''. Unlike living ''Isoetes
''Isoetes'', commonly known as the quillworts, is the only extant genus of plants in the family Isoetaceae, which is in the class of lycopods. There are currently 192 recognized species, with a cosmopolitan distribution but with the individual sp ...
'', ''Tomiostrobus'' formed closed cones with sporophylls that were distinctly shouldered and woody. This may have been an adaptation to heavy grazing by herbivorous therapsid
Therapsida is a major group of eupelycosaurian synapsids that includes mammals, their ancestors and relatives. Many of the traits today seen as unique to mammals had their origin within early therapsids, including limbs that were oriented more ...
s.
See also
*Evolution of plants
The evolution of plants has resulted in a wide range of complexity, from the earliest algal mats, through multicellular marine and freshwater green algae, terrestrial bryophytes, lycopods and ferns, to the complex gymnosperms and angiosperms (fl ...
References
Triassic plants Prehistoric lycophytes Prehistoric lycophyte genera {{triassic-plant-stub