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Nematasketum diversiforme
Nematasketum diversiforme N.D. Burgess, D. Edwards Bot. J. Linn. Soc., 97(2): 192. 20 Jun 1988
- Name
- Nematasketum diversiforme
- Rank
- Species
- Generic Name
- [Genus] Nematasketum
- Authors (Pub.)
- Burgess N. D.
Edwards D.
- Publication
- A new Palaeozoic plant closely allied to Prototaxites Dawson [1988/6]
- Journal
- Botanical Journal of the Linnean Society
- Volume
- 97
- Issue
- 2
- Page number
- 192
- Year
- 1988
- Fossil Status
- axes (tubular)
- Stratigraphy
- Pragian
- Location
- Lye Stream near Morville, Shropshire, U.K.
- Paleoregion
- Laurussia (Avalonia)
Data for Holotypus
- Repository
- Natural History Museum, London, U.K.
- Repository Number
- V.62757 on stub LYE 159
- Diagnosis
- Plant at least 50.0 mm long and 30.0 mm wide with 50% volume comprising unbranched tubes 10( 18)25 pm wide, of unknown length and predominantly parallel orientation, and with smooth walls of uniform thickness. Wide tubes surrounded by branched narrow filaments of indeterminate length with cells 10-80 pm long, 2.0(3.5)6.0 pm in dameter and with smooth-uniformly thickened walls except for a central swelling in each septum, by relatively infrequent, f branched, wider filaments 8( 14)20 pm in diameter and of indeterminate length, with internally smooth walls and centrally thickened septa, and by internally differentially thickened branched tubes 4( 12)20 pm wide, straight to sinuous and randomly orientated: thickenings annular, anastomosing or incomplete, 0.5( 1 .O) 1.5 pm wide and 0.3 (1 .O) 1.5 pm apart. Subspherical to spherical medullary spots, 100-500 pm diameter, dominated by very narrow smooth-walled tubes, 0.3-1.5 pm wide, branched and randomly orientated and associated with much-branched internally thickened tubes, 4-20 pm wide, and rare narrow filaments.
