Picea sp. 2
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publication ID |
https://doi.org/ 10.37520/fi.2023.004 |
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persistent identifier |
https://treatment.plazi.org/id/4D2487A3-EF57-826B-FE08-FB6E6AFAFD39 |
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treatment provided by |
Felipe |
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scientific name |
Picea sp. 2 |
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Text-fig. 3e View Text-fig
M a t e r i a l. USNM PAL 776565, 776566.
L o c a l i t y. Tunnel Creek.
D e s c r i p t i o n. Winged seed linear 13.5–14.7 mm long, 6.2–6.9 mm wide; widest point of wing just distal of the halfway mark; wing encompasses most of seed body; seed body with concave notch on the proximal medial side; seed body obovate to elliptical 3.2–4.6 mm long, 1.6– 2.0 mm wide.
Comments on fossil Picea
Picea seeds have a distinctive concave notch on the proximal medial side ( Wolfe and Schorn 1990). Picea sp. 2 differs from Picea sp. 1 in being larger, with its widest point only slightly past the midpoint of the wing instead of more distal. The wing also encompasses more of the seed body. Pollen of Picea is recognized from the early Eocene Green River Formation ( Wodehouse 1933, Nichols 2010), the Chuckanut Formation of Washington ( Griggs 1970) and the Quilchena flora of British Columbia ( Mathewes et al. 2016). Macrofossils are known from the early Eocene Republic flora (Klondike Mountain Formation of Republic, Washington) ( Pigg et al. 2011), McAbee and Falkland floras of British Columbia ( Dillhoff et al. 2005, Smith et al. 2012), late Eocene Beaverhead Basin of Montana ( DeVore and Pigg 2010) and Florissant Formation of Colorado ( MacGinitie 1953), the Oligocene Creede Flora of Colorado ( Wolfe and Schorn 1990) and Ruby River Basin of Montana ( Becker 1961) . Axelrod (1998) initially recognized Picea coloradensis AXELROD , Picea deweyensis AXELROD , and Picea magna AXELROD , from the mid-Eocene Thunder Mountain flora of Idaho. The specimens assigned to these species were subsequently identified as another genus, indeterminate, cf. Picea or Picea sp. by Erwin and Schorn (2005). The presence of Picea suggests microthermal conditions; these seeds may have come from the surrounding mountains around the basin ( Dawson and Constenius 2018).
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