Berry: A NEW MATONIDIUM FROM COLORADO 291 
These occurrences are assembled upon the accompanying 
sketch map (TEXT FiG. 1) and are shown within the enclosed areas 
in Europe and North America. The area of distribution of the 
two existing species of Matonia is shown on the map in solid black. 
A second rather well-known extinct genus belonging to this family 
is the genus Laccopteris, which was founded by Presl in 1838. 
Laccopteris was especially characteristic of the late Triassic and 
hence was considerably older in its inception than Matonidium. 
Its relationship with Matonia was first clearly defined by Zeiller* 





as 2 
ay 
] 



Rha he Wit eo. | | es 
Royyd’ | moe 7 ok 
yy & : fe 
& a 
FE 
a li as 

ch 












Fic. 1. Sketch map showing the area of distribution of the two existing species of 
Matonia (solid black), the fossil occurrences of Matonidium (black disks within the 
enclosed areas), and the fossil occurrences of Laccopteris where they do not coincide 
with occurrences of Matonidium (L). 
in 1885. Reference to the accompanying map (TEXT FIG. 1), 
where the occurrences of Laccopteris are indicated by L, shows that 
it greatly extends the Mesozoic range of the family and gives the 
Matoniaceae representation in the far north (Greenland and 
Spitzbergen), in the Asiatic region and in Australia. Other and 
less well known fossil genera which have been referred to the 
Matoniaceae include Phlebopteris Brongniart, Microdictyon Sa- 
porta and Knowltonella Berry. 
* Bull. Soc. Bot. France 32: 22. 1885. 

