When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Specimen: Museum quality, extremely rare specimen of aSilurian oldestland plant true Silurian Moss ( wig with leaves )Bryophyta
Locality: Poland , Holly Cross Mountains , Kielce area
Stratigraphy: Upper Silurian,( Ludlowian / Pridolian )
Age:ca. 422 Mya
Matrix size :ca. 8,0 x 6,5 x 1,0 cm ( white square on picturesis 1,0 x 1,0 cm)
Description:
Extremely RARE fossil plant -first oldest Silurian land plant fossil Moss Bryophyta twig with " leaves" leaflets !
Traditionally, the liverworts were grouped together with other bryophytes (mosses and hornworts) in the Division Bryophyta, within which the liverworts made up the class Hepaticae (also called Marchantiopsida). However, since this grouping makes the Bryophyta paraphyletic, the liverworts are now usually given their own division.The use of the division name Bryophyta sensu lata is still found in the literature, but more frequently the name is used in a restricted sense to include only the mosses. Another reason that liverworts are now classified separately is that they appear to have diverged from all other embryophyte plants near the beginning of their evolution.The strongest line of supporting evidence is that liverworts are the only living group of land plants that do not have stomata on the sporophyte generation. Among the earliest fossils believed to be liverworts are compression fossils ofPallaviciniitesfrom the Upper Devonian of New York !
