The INTERNATIONAL FOSSIL PLANT NAMES INDEX
Global registry of scientific names of fossil organisms covered by the International Code of Nomenclature for Algae, Fungi, and Plants and the International Code of Zoological Nomenclature © 2014-2024

IDNAME urn:idName:ifpni.org:species:932DB8A4-72C2-F61A-5F27-69A7F1FDB6C9 species
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Taxodium wallisii

Taxodium wallisii Aulenb., B.A. LePage Int. J. Pl. Sci., 159(2): 371. Mar 1998
Name
Taxodium wallisii
Rank
Species
Generic Name
[Genus] Taxodium
Authors (Pub.)
Aulenback K. R. LePage B. A.  
Publication
Taxodium wallisii sp. nov.: first occurrence of Taxodium from the Upper Cretaceous [1998/3]
Journal
International Journal of Plant Sciences
Volume
159
Issue
2
Page number
371
Year
1998
Fossil Status
leafy twigs (with reproductive organs)
Stratigraphy
Upper Cretaceous
Strat. comment
Horseshoe Canyon Formation
Location
Drumheller, Alberta, Canada
Paleoregion
America (North)
Data for Holotypus
Repository
Royal Tyrrell Museum of Palaeontology, Drumheller, Canada
Repository Number
TMP 88.232.6500
Data for Paratypus
Repository
Royal Tyrrell Museum of Palaeontology, Drumheller, Canada
Repository Number
TMP 88.232.6448, 88.232.6450, 88.232.6486, 88.232.6490, 88.232.6491, 88.232.6494, 88.232.6499, 88.232.6502, and 94.9.6.
Diagnosis
Branching alternate. Leaves dimorphic, helically arranged. Taxodioid leaves persistent, decurrent, acicular, linear-falcate, acuminate, abaxially keeled, triangular in cross-section, with the free portion up to 11.5 mm long, 1.0 mm wide. Cupressoid leaves persistent, ovate, nondecurrent, up to 2.0 mm long, 1.5 mm wide, apex acute to acuminate. Cupressoid leaves subtending staminate axes persistent, decurrent, ovate, falcate, with the free portion up to 5.0 mm long, 1.75 mm wide, apex acuminate and adaxially recurved. Seed cones arranged alternately on branch, erect, short-stalked, globose, bearing up to 15 deciduous, helically arranged imbricate bract-scale complexes; bracts and scales fused into complexes. Ovuliferous scale prominently lobed, commonly consisting of one apical and two lateral lobes that exceed the length of the bract. Bract rhomboidal with prominent, slightly recurved mucro. Seeds two per scale, unequally three-angled, 4.0-9.0 mm long, 1.9-5.5 mm wide; seed-coat thick, coriaceous; micropyle visible, up to 0.5 mm long; seed-attachment scar linear-oblong. Staminate cones arranged in long terminal panicles, cones occurring in axils of cupressoid leaves; cones up to 3.0 mm in diam, composed of up to nine helically arranged microsporphylls. Microsporophylls peltate, ovate to orbicular, apex slightly recurved adaxially, up to 1.0 mm long, 1.5 mm wide, margin entire. Microsporophyll bearing five to nine, pendulous sporangia arranged in two rows abaxially. Pollen 14.0-(20.0)-22.5 um in diam, elliptical to circular, minute papillate leptoma. Papillae less than 2.0 um long. Exine smooth to scabrate, thinner near leptoma than on the proximal face. Exine with irregularly distributed Ubisch bodies.

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