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''Walchia'' is a fossil conifer, cypress-like
genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...
found in upper Pennsylvanian ( Carboniferous) and lower Permian (about 310-290 Mya) rocks of Europe and North America. A forest of in-situ Walchia tree-stumps is located on the
Northumberland Strait The Northumberland Strait (French: ''détroit de Northumberland'') is a strait in the southern part of the Gulf of Saint Lawrence in eastern Canada. The strait is formed by Prince Edward Island and the gulf's eastern, southern, and western sh ...
coast at Brule,
Nova Scotia Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native Eng ...
. Besides the ''Walchia'' forest, fallen tree trunks, and leaflet impressions, the forest, fossil-rich layer contains numerous, 4-legged,
tetrapod Tetrapods (; ) are four-limbed vertebrate animals constituting the superclass Tetrapoda (). It includes extant and extinct amphibians, sauropsids ( reptiles, including dinosaurs and therefore birds) and synapsids ( pelycosaurs, extinct t ...
fossil trackway A fossil track or ichnite (Greek "''ιχνιον''" (''ichnion'') – a track, trace or footstep) is a fossilized footprint. This is a type of trace fossil. A fossil trackway is a sequence of fossil tracks left by a single organism. Over the yea ...
s.


Individual species

''W. hypnoides'': from the schists of Lodeve; also copper slates of the Zechstein in Mansfeld.


Monuran trackways

At the same
time period The categorisation of the past into discrete, quantified named blocks of time is called periodization.Adam Rabinowitz. And kingIt’s about time: historical periodization and Linked Ancient World Data'. Study of the Ancient universe Papers, 2014 ...
of 290 mya, another species was making fossil trackways, now preserved in
New Mexico ) , population_demonym = New Mexican ( es, Neomexicano, Neomejicano, Nuevo Mexicano) , seat = Santa Fe , LargestCity = Albuquerque , LargestMetro = Tiguex , OfficialLang = None , Languages = English, Spanish ( New Mexican), Navajo, Ke ...
; ''Walchia'' leaflets are found in the same fossil layers. The Monuran trackways were made by
Permian The Permian ( ) is a geologic period and System (stratigraphy), 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 ...
, wingless insects called monurans, (meaning "one-tail"); the insects' means of locomotion was hopping, then walking. These 290 mya layers contain footprints of the large '' Dimetrodon'', large/small raindrop impact marks, and also these fossil trackways of insects.


References


External links

;General articles:
Chemosystematic and microstructural investigations--(including ''Walchia'')Book preview-(1854)--''W. hypnoides'' discussion
;Walchia Fossil examples:
Graphic of ''W. piniformis'' branchlets
from James D. Dana, "Manual of Geology
Photo-High ResArticle
– www.news.ucdavis.edu--"A Bumpy Shift from Icehouse to Greenhouse", Fossil from Smithsonian. ''Walchia'' went from the 'Uplands' to the lower basins-(floodplain forest region of Brule, Nova Scotia).
Photo-High Res--4 cm width Leaflet-(Order Voltziales)
– www.colby.edu-"Carboniferous Paleoecological Scenarios" ;Walchia fossils, with Monuran trackways:
"The Footfalls and Bellyflops of Permian Insects"
– (from the Robledo Mountains of New Mexico) {{Taxonbar, from=Q3185543 Voltziales Conifer genera Prehistoric gymnosperm genera Carboniferous plants Permian plants Fossil trackways Carboniferous life of Europe Carboniferous life of North America Permian life of Europe Permian life of North America Paleozoic life of Nova Scotia Paleozoic life of Nunavut Paleozoic life of Prince Edward Island Pennsylvanian plants Pennsylvanian first appearances Permian extinctions