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Compsocradus
Genus Compsocradus C.M. Berry, W.E. Stein Int. J. Pl. Sci., 161(5): 810. Sep 2000
- Name
- Compsocradus
- Rank
- Genus
- Authors (Pub.)
- Berry C. M.
Stein W. E.
- Publication
- A new iridopteridalean from the Devonian of Venezuela [2000/9]
- Journal
- International Journal of Plant Sciences
- Volume
- 161
- Issue
- 5
- Page number
- 810
- Year
- 2000
- Parent Taxon
- [Order] Hyeniales
- Fossil Status
- stems (with sporangia)
- Type
- Compsocradus laevigatus
- Diagnosis
- Plants pseudomonopodial. First-order axes upright, with smooth surface. Second-order axes narrower and shorter, inserted acutely. Ultimate appendages consisting of narrow axes branched predominantly isotomously, successive dichotomies being approximately perpendicular; fertile ultimate appendages terminate in erect paired sporangia; sterile ultimate appendages terminate with oppositely recurved tips. Both ultimate appendages and second-order axes are arranged inserted in loose whorls on first-order axes, with attachments alternating in successive whorls. Protostele ribbed, mesarch, with six primary xylem ribs; traces arising from every other rib at each whorl, successive whorls alternating. Protoxylem strands located permanently peripherally, one in each primary xylem rib. Tracheids with uniseriate circular to oval bordered pits.
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