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Otzinachsonia
Genus Otzinachsonia Cressler, Pfefferk. Amer. J. Bot., 92(7): 1132. 27 Jun 2005
- Name
- Otzinachsonia
- Rank
- Genus
- Authors (Pub.)
- Cressler W. L.
Pfefferkorn H. W.
- Publication
- A Late Devonian isoetalean lycopsid, Otzinachsonia beerboweri, gen. et sp. nov., from North-Central Pennsylvania, USA [2005/6]
- Journal
- American Journal of Botany
- Volume
- 92
- Issue
- 7
- Page number
- 1132
- Year
- 2005
- Parent Taxon
- [Phylum] Isoetophyta
- Fossil Status
- stems (wood)
- Type
- Otzinachsonia beerboweri
- Diagnosis
- Lycopsid with axial elongation
and a four-lobed cormose base. Rootlets and round rootlet
scars arranged in orthostichies on the basal portion of the
stem. Small rootlet scars are concentrated on the lobes; large
rootlet scars are concentrated in the furrows. A transition zone
between the rhizomorph, i.e., the basal part of the stem, and
the distal part of the stem lacks evident scars. Distal portions
of stems have spirally arranged elliptical leaf scars without leaf
cushions that occur in parastichies. Tops of basal leaf scars
intercept the middle of short transverse ridges. Stem diameter
can reach 10 cm.
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