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- Title
TEMPSKYA WESTII SP. NOV. FROM THE LATE CRETACEOUS OF HARNETT COUNTY (ATLANTIC COASTAL PLAIN), NORTH CAROLINA, U.S.A.
- Authors
STEGALL, MATTHEW J.; SMITH, JOSEPH B.; MICKLE, JAMES E.
- Abstract
Tempskya Corda has long been known to occur in reworked deposits in the Atlantic Coastal Plain of North Carolina. North Carolina Tempskya specimens are silicified and have been recovered from aggregate mines in Harnett County, near Lillington. The specimens have been recovered from surface deposits and show clear evidence of reworking. The false trunks in the present material are radially symmetrical, and specimens studied are up to 18.5 cm in diameter. Stems are 4-8 mm in diameter, two-ranked, dichotomizing, with medium length internodes, and commonly show 1-2, rarely 3, leaf traces in cross section. Adventitious roots are diarch. Earlier workers had tentatively identified this Tempskya as T. grandis Read and Brown. Analysis indicates that the North Carolina Tempskya material differs markedly from T. grandis in number of petiole bases per transverse section of stem, shape of the petiolar xylem and disposition of sclerenchyma in the cortex. Characteristics displayed by the specimens from North Carolina suggest that this material represents a previously unrecognized species of Tempskya. This new species is most similar to Tempskya uemurae Nishida from Japan both in tissue composition and probable age, however differs due to the lack of xylem parenchyma.
- Subjects
HARNETT County (N.C.); XYLEM; TAXONOMIC logic
- Publication
Journal of the North Carolina Academy of Science, 2018, Vol 134, Issue 3/4, p38
- ISSN
2167-5872
- Publication type
Article
- DOI
10.7572/jncas-d-17-00004.1