Abstract
The name Pseudoditrichum mirabile Steere et Iwatsuki is proposed for a minute moss with leafy stem 1-3 mm high and seta 6 mm long; it was collected on calcareous silt near the Sloan River, Great Bear Lake, Northwest Territories, only a few miles south of the Arctic Circle. The gametophytic characters agree well with those of the Ditrichaceae, a relatively primitive family, but the peristome is clearly double, with the inner and outer teeth opposite, which thereby indicates a much more advanced phylogenetic position, perhaps at the evolutionary level of the Funariaceae. As the combination of gametophytic and sporophytic characteristics exhibited by this moss does not occur in any existing family of mosses, it is therefore deemed necessary to create the new family Pseudoditrichaceae for the new genus and species described here.
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Claims 8
Claim · model-written summary
Pseudoditrichum mirabile was proposed as a new moss species.
- Taxon
- Pseudoditrichum mirabilePseudoditrichum mirabilee0
- Outcome
- name Pseudoditrichum mirabile Steere et Iwatsukie0
Verbatim
e0“The name Pseudoditrichum mirabile Steere et Iwatsuki is proposed for a minute moss”
Claim · model-written summary
Its leafy stem was 1-3 mm high.
- Taxon
- Pseudoditrichum mirabilePseudoditrichum mirabilet0
- Organ / stage
- leafy steme0
- Outcome
- leafy steme0
- Value
- 1-3 mme0
Verbatim
e0“a minute moss with leafy stem 1-3 mm high and seta 6 mm long”
t0“Pseudoditrichum mirabile”
Claim · model-written summary
Its seta was 6 mm long.
- Taxon
- Pseudoditrichum mirabilePseudoditrichum mirabilet0
- Organ / stage
- setae0
- Outcome
- setae0
- Value
- 6 mme0
Verbatim
e0“a minute moss with leafy stem 1-3 mm high and seta 6 mm long”
t0“Pseudoditrichum mirabile”
Claim · model-written summary
The moss occurred on calcareous silt near Sloan River and Great Bear Lake.
- Taxon
- Pseudoditrichum mirabilePseudoditrichum mirabilet0
- Outcome
- collected on calcareous silte0
- Setting
- Sloan River, Great Bear Lake, Northwest Territoriese0
Verbatim
e0“it was collected on calcareous silt near the Sloan River, Great Bear Lake, Northwest Territories”
t0“Pseudoditrichum mirabile”
Claim · model-written summary
Gametophytic characters resembled Ditrichaceae.
- Taxon
- Pseudoditrichum mirabilePseudoditrichum mirabilet0
- Outcome
- gametophytic characterse0
- Comparator
- Ditrichaceaee0
Verbatim
e0“The gametophytic characters agree well with those of the Ditrichaceae”
t0“Pseudoditrichum mirabile”
Claim · model-written summary
The peristome was double with opposite inner and outer teeth.
- Taxon
- Pseudoditrichum mirabilePseudoditrichum mirabilet0
- Outcome
- peristome is clearly double, with the inner and outer teeth oppositee0
Verbatim
e0“the peristome is clearly double, with the inner and outer teeth opposite”
t0“Pseudoditrichum mirabile”
Claim · model-written summary
The peristome suggested an advanced position near Funariaceae.
- Taxon
- Pseudoditrichum mirabilePseudoditrichum mirabilet0
- Outcome
- more advanced phylogenetic positione0
- Comparator
- Funariaceaee0
Verbatim
e0“indicates a much more advanced phylogenetic position, perhaps at the evolutionary level of the Funariaceae”
t0“Pseudoditrichum mirabile”
Claim · model-written summary
The authors established Pseudoditrichaceae for this distinct moss.
- Taxon
- Pseudoditrichum mirabilePseudoditrichum mirabilet0
- Outcome
- new family Pseudoditrichaceaee0
Verbatim
e0“it is therefore deemed necessary to create the new family Pseudoditrichaceae for the new genus and species described here”
t0“Pseudoditrichum mirabile”