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Hughmillerites vancouverensis
Hughmillerites vancouverensis B.A.Atk., G.W. Rothwell, Stockey Amer. J. Bot., 101(12): 2 [2137]. 1 Dec 2014
- Name
- Hughmillerites vancouverensis
- Rank
- Species
- Generic Name
- [Genus] Hughmillerites
- Authors (Pub.)
- Atkinson B. A.
Rothwell G. W.
Stockey R. A.
- Publication
- Hughmillerites vancouverensis sp. nov. and the Cretaceous diversification of Cupressaceae [2014/12]
- Journal
- American Journal of Botany
- Volume
- 101
- Issue
- 12
- Page number
- 2 [2137]
- Year
- 2014
- Fossil Status
- cones (ovuliferous)
- Stratigraphy
- Valanginian
- Strat. comment
- Longarm Formation
- Location
- Coastal exposures at Apple Bay on Vancouver Island, British Columbia, Canada (50 ° 36 ′ 21 ″ N,127 ° 39 ′ 25 ″ W; UTM 9U WG 951068)
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- University of Oregon, Museum of Natural and Cultural History, Eugene, USA
- Repository Number
- Leafy shoot with terminal seed cone in F-55439 A bot, B top, B bot, C top, C bot, D top; F-55439
Data for Paratypus
- Repository
- University of Oregon, Museum of Natural and Cultural History, Eugene, USA
- Repository Number
- Seed cone in F-55440 A bot and B top
- Diagnosis
- Cone-bearing vegetative shoot at least 2.25 mm diam.; pith parenchymatous; secondary xylem pycnoxylic; stem cortex parenchymatous with scattered sclereids. Leaves awl-shaped, up to 3.0 mm long, 1.3 mm wide, and 1.0 mm thick. Mesophyll parenchymatous with scattered thick-walled cells; vascular trace single, terete with single abaxial resin canal;
transfusion tissue in horizontally elongated zone; hypodermis sclerotic, 3–4 cells thick. Seed cones 2.1 cm long, 2.0 cm wide, subspheroidal with numerous helically arranged bract/scale complexes. Cone axis up to 7.5 mm diam.; pith parenchymatous; secondary xylem cylinder pycnoxylic, continuous. Cortex of cone axis parenchymatous with resin canals, isolated
sclereids, and sclereid nests. Bract tips falcate. Bract trace cylindrical shaped at origin from cone axis. Ovuliferous scale trace diverging vertically from bract trace. Central abaxial resin canal of bract/scale complex branching from cortical system; additional resin canals arising de novo, branching infrequently. Seeds flattened, winged, ca. 2.4 mm long, ca. 1.0 thick, and ca. 2.0 mm wide; integument thin, and papillate.
