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Cooksonia banksii
Cooksonia banksii Habgood, D. Edwards, Axe Bot. J. Linn. Soc., 139(4): 352. Aug 2002
- Name
- Cooksonia banksii
- Rank
- Species
- Generic Name
- [Genus] Cooksonia
- Authors (Pub.)
- Habgood K. S.
Edwards D.
Axe L.
- Publication
- New perspectives on Cooksonia from the Lower Devonian of the Welsh Borderland [2002/8]
- Journal
- Botanical Journal of the Linnean Society
- Volume
- 139
- Issue
- 4
- Page number
- 352
- Year
- 2002
- Fossil Status
- stems (with sporangia)
- Stratigraphy
- Lochkovian
- Location
- north of Brown Clee Hill, Shropshire, England, U.K.
- Paleoregion
- Laurussia (Avalonia)
Data for Holotypus
- Repository
- National Museum of Wales, Cardiff, U.K.
- Repository Number
- NMW2001.44G.8
- Diagnosis
- Plant with single terminal sporangia on smooth axes. Sporangia 414 (550.6) 762.5 mm wide, 280 (329.5) 392 mm tall (from base of cavity) and subtending axis, 76 (122)180 mm wide. Subtending axis widens into the proximal sporangial wall enclosing a U-shaped, sunken sporangial cavity. No superficial distinction between subtending axis and proximal sporangial wall. Distal sporangial wall comprises one layer of superficially smooth, or low-relief, cells. Proximal sporangial wall comprises one layer of elongate cells except close to the equator, where they become isodiametric and the sporangial wall comprises 3–4 layers of cells. Trilete spores laevigate and crassitate at equator. Simple laesurae extend to equator. Comparable with Ambitisporites avitus.
