Abstract
A fossil of Anthelia from late-Pleistocene sediments at Tom Swamp, Massachusetts, consisted of a portion of a plant bearing the characteristic three rows of isomorphic, deeply bifid leaves. The fossil Anthelia indicates the existence of areas of late-lying snow in an essentially treeless, late-Pleistocene landscape. Associated bryophyte (mainly moss) and tracheophyte fossils establish the presence of additional hygric and mesic habitat types.The occurrence of Anthelia and other leafy liverwort fossils in the basal inorganic sediments at Tom Swamp is unusual. Features of these fossils suggest that the translucent quality of some of the fragments and their small size (1 mm or smaller), which relates to fragmentation during transport, diagenesis and extraction (the breakage resulting from a weak middle lamella between the cells), may be reasons for the rarity of Pleistocene and Holocene fossils of liverworts.Published as contribution number 589 of the New York State Science Service.
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Claims 5
Claim · model-written summary
A late Pleistocene Anthelia fossil bore three rows of deeply divided leaves.
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AntheliaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
_4542.JPG?width=500)
Verbatim
e0“A fossil of Anthelia from late-Pleistocene sediments at Tom Swamp, Massachusetts, consisted of a portion of a plant bearing the characteristic three rows of isomorphic, deeply bifid leaves”
Claim · model-written summary
The Anthelia fossil indicates late lying snow in a largely treeless late Pleistocene landscape.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fossil Anthelia indicates the existence of areas of late-lying snow in an essentially treeless, late-Pleistocene landscape”
Claim · model-written summary
Associated plant fossils establish additional moist habitat types.
Verbatim
e0“Associated bryophyte (mainly moss) and tracheophyte fossils establish the presence of additional hygric and mesic habitat types”
Claim · model-written summary
Leafy liverwort fossils occurred unusually in basal inorganic sediments at Tom Swamp.
- Outcome
- occurrence of Anthelia and other leafy liverwort fossilse0
- Qualifier
- unusuale0
- Setting
- Tom Swampe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The occurrence of Anthelia and other leafy liverwort fossils in the basal inorganic sediments at Tom Swamp is unusual”
Claim · model-written summary
Small, translucent, fragmented liverwort fossils may explain their rarity in Pleistocene and Holocene deposits.
- Taxon
- liverwortsMarchantiophytae0
- Outcome
- rarity of Pleistocene and Holocene fossils of liverwortse0
- Qualifier
- translucent quality of some of the fragments and their small size (1 mm or smaller)e0
Verbatim
e0“the translucent quality of some of the fragments and their small size (1 mm or smaller), which relates to fragmentation during transport, diagenesis and extraction (the breakage resulting from a weak middle lamella between the cells), may be reasons for the rarity of Pleistocene and Holocene fossils of liverworts”