Penultimate branchs ca. 31 cm long with longest branches in midregions of plagiotropic system; ultimate branches with simple leaves range 5.5–10 cm long. Penultimate stems 2.5–8 mm wide, ultimate stems 0.5–2.1 mm wide at base; sclerotic nests in pith. Large multiseriate branched trichomes and trichome bases on stem cuticles. Forked penultimate leaves 14.0–30 mm long; simple ultimate leaves 4.0–21 mm long, straight or bent gently toward shoot apex. Stomatal rows of various lengths. Leaf surfaces with marginal trichomes; simple and multiseriate surficial trichomes. Hypodermis present beneath both leaf surfaces. Ovulate cone/fertile zone cylindrical, at least 11 cm long, 2.7 cm wide. Ovules 6.7–7 mm long, 3–5.8 mm in major plane, 1.9–3.4 mm in minor plane, with coarse trichomes.
Hanskerpia hamiltonensis Rothwell, Mapes & Hernandez-Castillo, sp. nov.
nomenclatorial act:
protologue/first publication
Bibliography:
Page:
734
diagnosis:
typeseries:
Holotype. — Penultimate leafy shoot that terminates in an ovulate cone. Specimen M1620, Figs. 7–9 (OUPH No. 16,244–16,246; 16,250–16,515).
Paratypes. — M488, anatomically preserved leafy penultimate branch showing stem and leaf morphology, anatomy, and cuticular features, Figs. 4A, 6B (OUPH No. 16,238; 16,248; 16,538–16,597); M1081, anatomically
preserved leafy penultimate branch showing morphology, anatomy, and cuticular features, Fig. 1C, (OUPH No. 16,613–16,657); M1314, anatomically preserved leafy penultimate branch showing anatomy and cuticular features, Figs. 4B–4F, 5D (OUPH No. 16,239–16,243; 16,667–16,693); M1337, plagiotropic leafy lateral branch system, Fig. 1B (OUPH No. 16,231;16,694–16,699); M2339, plagiotropic leafy lateral branch system, Fig. 1A (OUPH No. 16,230).
stratigraphy:
Classification:
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