A lower cretaceous (Valanginian) seed cone provides the earliest fossil record for Picea (Pinaceae)

American Journal of Botany

Volumn 99, Issue 6, 2012, Pages 1069-1082

  Klymiuk, Ashley A ^a,b   Stockey, Ruth A ^a,c  

^a UNIVERSITY OF ALBERTA   (Canada)

^b UNIVERSITY OF KANSAS   (United States)

^c OREGON STATE UNIVERSITY   (United States)

Author keywords

Conifer; Cretaceous; Midoriphyllum; Picea; Pinaceae; Pityostrobus; Seed cone

Indexed keywords

ANATOMY; CLADISTICS; CONIFEROUS TREE; CRETACEOUS; FOSSIL RECORD; MORPHOLOGY; PALEOBOTANY; PALYNOLOGY; SEED;

ARTICLE; CANADA; CLASSIFICATION; EVOLUTION; FOSSIL; GENETICS; HISTOLOGY; OVULE; PHYLOGENY; PLANT SEED; POLLEN; SPRUCE; TIME;

BIOLOGICAL EVOLUTION; BRITISH COLUMBIA; FOSSILS; OVULE; PHYLOGENY; PICEA; POLLEN; SEEDS; TIME FACTORS;

APPLE BAY; BRITISH COLUMBIA; CANADA; VANCOUVER ISLAND;

CATHAYA; CONIFEROPHYTA; MALUS X DOMESTICA; PICEA; PINACEAE; PITYOSTROBUS;

EID: 84862148019     PISSN: 00029122     EISSN: None     Source Type: Journal    
DOI: 10.3732/ajb.1100568     Document Type: Article

References (115)

1. ALVIN, K. L. 1953. Three abietaceous cones from the Wealden of Belgium. Institut Royal des Sciences Naturelles de Belgique Memoires 125: 1-42.
2. ALVIN, K. L. 1957a. On the two cones Pseudoaraucaria heeri (Coemans) nov. comb. and Pityostrobus villerotensis nov. sp. from the Wealden of Begium. Institut Royal des Sciences Naturelles de Belgique Memoires 135: 1-27.
3. ALVIN, K. L. 1957b. On Pseudoaraucaria Fliche emend., a genus of fossil pinaceous cones. Annals of Botany 21: 33-51.
4. ALVIN, K. L. 1960. Further conifers of the Pinaceae from the Wealden Formation of Belgium. Institut Royal des Sciences Naturelles de Belgique Memoires 146: 1-39.
5. ALVIN, K. L. 1988. On a new specimen of Pseudoaraucaria major Fliche (Pinaceae) from the Cretaceous Isle of Wight. Botanical Journal of the Linnean Society 97: 159-170.
6. BAGNELL, R. C. 1975. Species distinction among pollen grains of Abies, Picea, and Pinus in the Rocky Mountain area (a scanning electron microscope study). Review of Palaeobotany and Palynology 19: 203-220.
7. BERRY, E. W. 1905. The flora of the Cliffwood Clays. New Jersey Geological Survey Annual Report 1905: 135-172.
8. BLOKHINA, N. I. 2010. Fossil wood of Abietoxylon shakhtnaense sp. nov. (Pinaceae) from the Upper Oligocene-Lower Miocene deposits of southeastern Sakhalin. Paleontological Journal 44: 348-355.
9. BLOKHINA, N. I., and M. A. AFONIN. 2007. Fossil wood Cedrus penzhinaensis sp. nov. (Pinaceae) from the Lower Cretaceous of northwestern Kamchatka (Russia). Acta Paleobotanica 47: 379-389.
10. BLOKHINA, N. I., and M. A. AFONIN. 2009. New species of Piceoxylon Gothan (Pinaceae) from the Cretaceous and Paleogene of the northwestern Kamchatka Peninsula. Paleontological Journal 43: 1190-1201.
11. BLOKHINA, N. I., M. A. AFONIN, and A. M. POPOV. 2006. Fossil wood of Keteleerioxylon kamtschatkiense sp. nov. (Pinaceae) from the Cretaceous of northwestern Kamchatka Peninsula. Paleontological Journal 40: 678-686.
12. COEMANS, E. 1866. La flore fossile du premier étage du terrain crétacé du Hainaut. Mémoires de l'Académie Royale des Sciences de Belgique 36: 1-21.
13. CONROY, C. J., and M. VAN TUINEN. 2003. Extracting time from phylogenies: Positive interplay between fossil and genetic data. Journal of Mammalogy 84: 444-455.
14. CORNET, B. 1989. Late Triassic angiosperm-like pollen from the Richmond rift basin of Virginia, U.S.A. Palaeontographica, Abteilung B 213: 37-87.
15. CORNET, B., and D. HABIB. 1992. Angiosperm-like pollen from the Late Jurassic (Oxfordian) of France. Review of Palaeobotany and Palynology 71: 269-294.
16. CRABTREE, D. R. 1983. Picea wolfei, a new species of petrified cone from the Miocene of northwestern Nevada. American Journal of Botany 70: 1356-1364.
17. CRABTREE, D. R., and C. N. MILLER JR. 1989. Pityostrobus makahensis, a new species of silicified pinaceous seed cone from the middle Tertiary of Washington. American Journal of Botany 76: 176-184.
18. CRANE, P. R., P. HERENDEEN, and E. M. FRIIS. 2004. Fossils and plant phylogeny. American Journal of Botany 91: 1683-1699.
19. CREBER, G. T. 1956. A new species of abietaceous cone from the Lower Greensand of the Isle of Wight. Annals of Botany 20: 375-383.
20. CREBER, G. T. 1960. On Pityostrobus leckenbyi (Carruthers) Seward and Pityostrobus oblongus (Lindley & Hutton) Seward, fossil abietaceous cones from the Cretaceous. Botanical Journal of the Linnean Society 56: 421-429.
21. CREBER, G. T. 1967. Notes on some petrified cones of the Pinaceae from the Cretaceous. Proceedings of the Linnaean Society of London 178: 147-152.
22. CZAJA, A. 2000. Pseudotsuga jechorekiae sp. nova, der erste fossile Nachweis der Gattung Pseudotsuga Carrière nach Zapfen aus dem Miozän der Oberlaustiz, Deutschland. Feddes Repertorium 111: 129-134.
23. DOYLE, J. A., and M. J. DONOGHUE. 1993. Phylogenies and angiosperm diversification. Paleobiology 19: 141-167.
24. DU, F. K., R. J. PETIT, and J. Q. LIU. 2009. More introgression with less gene flow: Chloroplast vs mitochondrial DNA in the Picea asperata complex in China, and comparison with other conifers. Molecular Ecology 18: 1396-1407.
25. DUTT, C. P. 1916. Pityostrobus macrocephalus, L. and H.: A Tertiary cone showing ovular structures. Annals of Botany 30: 529-549.
26. ECKENWALDER, J. E. 2009. Conifers of the world. Timber Press, Portland, Oregon, USA.
27. ECKERT, A. J., and B. D. HALL. 2006. Phylogeny, historical biogeography, and patterns of diversification for Pinus (Pinaceae): Phylogenetic tests of fossil-based hypotheses. Molecular Phylogenetics and Evolution 40: 166-182.
28. FALDER, A. B., G. W. ROTHWELL, G. MAPES, R. H. MAPES, and L. A. DOGUZHAEVA. 1998. Pityostrobus milleri sp. nov., a pinaceous cone from the lower Cretaceous (Aptian) of southwestern Russia. Review of Palaeobotany and Palynology 103: 253-261.
29. FARJON, A. 1998. World checklist and bibliography of conifers. Royal Botanical Gardens, Kew, UK.
30. FARJON, A. 2010. Handbook of the world's conifers. Koninklijke Brill NV, Leiden, Netherlands.
31. FELSENSTEIN, J. 1985. Confidence limits on phylogenies: An approach using the bootstrap. Evolution 39: 783-791.
32. FLESSA, K. W., A. H. CUTLER, and K. H. MELDAHL. 1993. Time and taphonomy: Quantitative estimates of time-averaging and stratigraphic disorder in a shallow marine habitat. Paleobiology 19: 266-286.
33. FLICHE, P. 1896. Études sur la flore fossile de l'Argonne: Albien-Cénomanien. Bulletin de la Société des Sciences de Nancy 14: 114-306.
34. FOREST, F., V. SAVOLAINEN, M. W. CHASE, R. LUPIA, A. BRUNEAU, and P. R. CRANE. 2005. Teasing apart molecular- versus fossil-based error estimated when dating phylogenetic trees: A case study in the birch family (Betulaceae). Systematic Botany 30: 118-133.
35. FRIIS, E. M., P. R. CRANE, and K. R. PEDERSON. 2011. Early flowers and angiosperm evolution. Cambridge University Press, Cambridge, UK.
36. GERMANO, J., M. COX, W. A. WRIGHT, M. P. ARSENAULT, A. THORNER, A. S. KLEIN, and C. S. CAMPBELL. 2002. A chloroplast DNA phylogeny of Picea (Pinaceae). Botany 2002: Annual Meeting of the Botanical Society of America in Madison, Wisconsin, USA [online abstract http://bsa2002.scientific-conference.net/section12/abstracts/127.shtml].
37. GERNANDT, D. S., C. LEÓN-GÓMEZ, S. HERNÁNDE-LEÓN, and M. E. OLSON. 2011. Pinus nelsonii and a cladistic analysis of Pinaceae ovulate cone characters. Systematic Botany 36: 583-594.
38. GERNANDT, D. S., S. MAGALLÓN, G. G. LOPEZ, O. Z. FLORES, A. WILLYARD, and A. LISTON. 2008. Use of simultaneous analyses to guide fossilbased calibrations of Pinaceae phylogeny. International Journal of Plant Sciences 169: 1086-1099.
39. GOLOBOFF, P. A., J. S. FARISS, and K. C. NIXON. 2008. TNT, a free program for phylogenetic analysis. Cladistics 24: 774-786.
40. GRAUR, D., and W. MARTIN. 2004. Reading the entrails of chickens: Molecular timescales of evolution and the illusion of precision. Trends in Genetics 20: 80-86.
41. HAGGART, J. W., and H. W. TIPPER. 1994. New results in Jura-Cretaceous stratigraphy, northern Vancouver Island, British Columbia. Geological Survey of Canada Current Research 1994E: 59-66.
42. HAMMACK, J. L., G. T. N IXON, V. KOYAN, G. J. P AYIE, A. PANTELEYEV, N. W. D. MASSEY, J. V. HAMILTON, and J. W. HAGGARD. 1994. Preliminary geology of the Quatsino-Port McNeill Area, northern Vancouver Island. Geological Survey of British Columbia open file 1994-26, Victoria, British Columbia, Canada.
43. HART, J. 1987. A cladistic analysis of conifers: Preliminary results. Journal of the Arnold Arboretum 68: 269-307.
44. HE, H. Y., X. L. WANG, Z. H. ZHOU, F. WANG, A. BOVEN, G. H. SHI, and R. X. ZHU. 2004. Timing of the Jiufotang Formation (Jehol Group) in Liaoning, northeastern China, and its implications. Geophysical Research Letters 31: L12605.
45. HO, S. Y. W., and M. J. PHILLIPS. 2009. Accounting for calibration uncertainty in phylogenetic estimation of evolutionary divergence times. Systematic Biology 58: 367-380.
46. HU, Y.-S., and F. H. WANG. 1984. Anatomical studies of Cathaya (Pinaceae). American Journal of Botany 71: 727-735.
47. HU, Y.-S., and B.-J. YAO. 1983. Transfusion tissue in gymnosperm leaves. Botanical Journal of the Linnean Society 83: 263-272.
48. INTERNATIONAL COMMISSION ON STRATIGRAPHY. 2010. International Stratigraphic Chart, Sept 2010. International Union of Geological Sciences, Reston, Virginia, USA [online]. Website http://www.stratigraphy.org/column.php?id=Chart/Time%20Scale.
49. JAGELS, R., B. A. LEPAGE, and M. JIANG. 2001. Definitive identification of Larix (Pinaceae) wood based on anatomy from the middle Eocene Axel Heiberg Island, Canadian high Arctic. International Association of Wood Aanatomists Journal 20: 73-83.
50. JELETZKY, J. A. 1976. Mesozoic and Tertiary rocks of Quatsino Sound, Vancouver Island, British Columbia. Geological Survey of Canada Bulletin 242: 1-243.
51. JIANG, B., and J. SHA. 2006. Late Mesozoic stratigraphy in western Liaoning, China: A review. Journal of Asian Earth Sciences 28: 205-217.
52. JOY, K. W., A. J. WILLIS, and W. S. LACEY. 1956. A rapid cellulose acetate peel technique in palaeobotany. Annals of Botany 20: 635-637.
53. KAPP, R. O. 1969. How to know pollen and spores. WC Brown, Dubuque, Iowa, USA.
54. nd ed. American Association of Stratigraphic Palynologists Foundation, College Station, Texas, USA.
55. KIDWELL, S. M. 2002. Time-averaged molluscan death assemblages: Palimpsests of richness, snapshots of abundance. Geology 30: 803-806.
56. KOWALEWSKI, M. 1996. Time-averaging, overcompleteness, and the geological record. Journal of Geology 104: 317-326.
57. KRASSILOV, V. 1982. Early Cretaceous flora of Mongolia. Palaeontographica, Abteilung B 181: 1-43.
58. LEPAGE, B. A. 2001. New species of Picea A. Dietrich (Pinaceae) from the middle Eocene of Axel Heiberg Island, Arctic Canada. Botanical Journal of the Linnean Society 135: 137-167.
59. LEPAGE, B. A. 2003a. The evolution, biogeography and palaeoecology of the Pinaceae based on fossil and extant representatives. Acta Horticulturae 615: 29-52.
60. LEPAGE, B. A. 2003b. A new species of Tsuga (Pinaceae) from the middle Eocene of Axel Heiberg Island, Canada, and an assessment of the evolution and biogeographical history of the genus. Botanical Journal of the Linnean Society 141: 257-296.
61. LEPAGE, B. A., and J. F. BASINGER. 1991. A new species of Larix (Pinaceae) from the early Tertiary of Axel Heiberg Island, Arctic Canada. Review of Palaeobotany and Palynology 70: 89-111.
62. LEPAGE, B. A., and J. F. BASINGER. 1995. Evolutionary history of the genus Pseudolarix Gordon (Pinaceae). International Journal of Plant Sciences 156: 910-950.
63. LISTON, A., D. S. GERNANDT, T. F. V INING, C. S. C AMPBELL, and D. P IÑERO. 2003. Molecular phylogeny of Pinaceae and Pinus. Acta Horticulturae 615: 107-114.
64. LIU, Y.-S., and J. F. BASINGER. 2000. Fossil Cathaya (Pinaceae) pollen from the Canadian high Arctic. International Journal of Plant Sciences 161: 829-847.
65. LOUVEL, C. 1960. Contribution a l'étude de Pityostrobus oblongus (Fliche sp.) appareil femelle d'un conifère Albien de l'Argonne. Les Mémoires de la Société de Geologique de France 90: 1-28.
66. MACEACHERN, J. A., K. L. BANN, J. P. BHATTACHARYA, and C. D. HOWELL. 2005. Ichnology of deltas: Organism responses to the dynamic interplay of rivers, waves, storms and tides. In B.P. Bhattacharya and L. Giosan [eds.], SEPM Special publication 83: River deltas: Concepts, models, and examples, 1-37. Society for Sedimentary Geology, Tulsa, Oklahoma, USA.
67. MACKO, S. 1963. Sporomorphs from Upper Cretaceous near Opole (Silesia) and from the London Clays. Travaux de la Société des Sciences et des Lettres de Wroclaw, B 106: 1-136.
68. MAGALLÓN, S., and M. J. SANDERSON. 2001. Absolute diversification rates in angiosperm clades. Evolution 55: 1762-1780.
69. MATHEWS, S. 2009. Phylogenetic among seed plants: Persistent questions and the limits of molecular data. American Journal of Botany 96: 228-236.
70. MILLER, C. N. J R. 1970. Picea diettertiana, a new species of petrified cones from the Oligocene of Western Montana. American Journal of Botany 57: 579-589.
71. MILLER, C. N. JR. 1972. Pityostrobus palmeri, a new species of petrified conifer cones from the Late Cretaceous of New Jersey. American Journal of Botany 59: 352-358.
72. MILLER, C. N. JR. 1974. Pityostrobus hallii, a new species of structurally preserved conifer cones from the Late Cretaceous of Maryland. American Journal of Botany 61: 798-804.
73. MILLER, C. N. JR. 1976a. Early evolution in the Pinaceae. Review of Palaeobotany and Palynology 21: 101-117.
74. MILLER, C. N. JR. 1976b. Two new pinaceous cones from the early Cretaceous of California. Journal of Paleontology 50: 821-832.
75. MILLER, C. N. JR. 1977a. Mesozoic conifers. Botanical Review 43: 217-280.
76. MILLER, C. N. JR. 1977b. Pityostrobus lynnii (Berry) comb. nov., a pinaceous seed cone from the Paleocene of Virginia. Bulletin of the Torrey Botanical Club 104: 5-9.
77. MILLER, C. N. JR. 1978. Pityostrobus cliffwoodensis (Berry) comb. nov., a pinaceous seed cone from the Late Cretaceous of New Jersey. Botanical Gazette (Chicago, Ill.) 139: 284-287.
78. MILLER, C. N. JR. 1985. Pityostrobus pubescens, a new species of pinaceous cones from the Late Cretaceous of New Jersey. American Journal of Botany 72: 520-529.
79. MILLER, C. N. J R. 1988. The origin of modern conifer families. In C. B. Beck [ed.], Origin and evolution of gymnosperms, 448-486. Columbia University Press, New York, New York, USA.
80. MILLER, C. N. JR. 1989. A new species of Picea based on silicified seed cones from the Oligocene of Washington. American Journal of Botany 76: 747-754.
81. MILLER, C. N. JR., and P. LI. 1994. Structurally preserved larch and spruce cones from the Pliocene of Alaska. Quaternary International 22-23: 207-214.
82. MILLER, C. N. J R., and C. R. ROBISON. 1975. Two new species of structurally preserved pinaceous cones from the Late Cretaceous of Martha's Vineyard Island, Massachusetts. Journal of Paleontology 49: 138-150.
83. MULLER, J. E., K. E. NORTHCOTE, and D. CARLISLE. 1974. Geology and mineral deposits of the Alert Bay-Cape Scott map area, Vancouver Island, B.C. Geological Survey of Canada Paper 74, Natural Resources Canada/Ressources Naturelles Canada, Ottawa, Ontario, Canada.
84. NEAR, T. J., P. A. MEYLAN, and H. B. SHAFFER. 2005. Assessing concordance of fossil calibration points in molecular clock studies: An example using turtles. American Naturalist 165: 137-146.
85. NELSON, G. 1979. Cladistic analysis and synthesis: Principles and definitions, with a historical note on Adanson's Famille des Plantes (1763-1764). Systematic Zoology 28: 1-21.
86. NIXON, K. C. 1999. The parsimony ratchet, a new method for rapid parsimony analysis. Cladistics 15: 407-414.
87. NIXON, K. C., and J. M. CARPENTER. 1996. On consensus, collapsibility and clade concordance. Cladistics 12: 305-321.
88. OHSAWA, T., H. NISHIDA, and M. NISHIDA. 1991. Structure and affinities of the petrified plants from the Cretaceous of northern Japan and Saghalien. VII. A petrified pinaceous cone from the Upper Cretaceous of Hokkaido. Journal of Japanese Botany 66: 356-368.
89. OHSAWA, T., M. NISHIDA, and H. NISHIDA. 1992. Structure and affinities of the petrified plants from the Cretaceous of northern Japan and Saghalien. XII. Obirastrobus gen. nov., petrified pinaceous cones from the Upper Cretaceous of Hokkaido. Botanical Magazine 105: 461-484.
90. PEMBERTON, S. G., J. A. MACEACHERN, M. K. GINGRAS, and T. SAUNDERS. 2008. Biogenic chaos: Cryptobioturbation and the work of sedimentologically friendly organisms. Palaeogeography, Palaeoclimatology, Palaeoecology 270: 273-279.
91. PENNY, J. S. 1947. Studies on the conifers of the Magothy flora. American Journal of Botany 34: 281-296.
92. PRICE, R. A. 1989. The genera of Pinaceae in the southeastern United States. Journal of the Arnold Arboretum 70: 247-305.
93. PRICE, R. A., A. LISTON, S. H. STRAUSS, and J. M. LOWENSTEIN. 1987. Relationships among the genera of Pinaceae: An immunological comparison. Systematic Botany 12: 91-97.
94. RAN, J.-H., X.-X. WEI, and X.-Q. WANG. 2006. Molecular phylogeny and biogeography of Picea (Pinaceae): Implications for phylogeographical studies using cytoplasmic haplotypes. Molecular Phylogenetics and Evolution 41: 405-419.
95. RATZEL, S. R., G. W. ROTHWELL, G. MAPES, R. H. MAPES, and L. A. DOGUZHAEVA. 2001. Pityostrobus hokodzensis, a new species of pinaceous cone from the Cretaceous of Russia. Journal of Paleontology 75: 895-900.
96. ROBISON, C. R., and C. N. MILLER JR. 1977. Anatomically preserved seed cones of the Pinaceae from the early Cretaceous of Virginia. American Journal of Botany 64: 770-779.
97. ROTHWELL, G. W., G. MAPES, R. A. STOCKEY, and J. HILTON. 2012. The seed cone Eathiestrobus gen. nov.: Fossil evidence for a Jurassic origin of Pinaceae. American Journal of Botany 99: 708-720.
98. RUDALL, P. J., J. HILTON, F, VERGARA-SILVA, and R. M. BATEMAN. 2010. Recurrent abnormalities in conifer cones and the evolutionary origins of flower-like structures. Trends in Plant Science 16: 1 51-159.
99. RYBERG, P. E., R. A. STOCKEY, J. HILTON, J. B. RIDING, and G. W. ROTHWELL. 2010. Early evolution of Pinaceae: An anatomically preserved Pinus seed cone from the Early Cretaceous of Yorkshire. Botany 2010: Annual Meeting of the Botanical Society of America in Snowbird, Utah, USA [online abstract http://2010.botanyconference.org/engine/search/index.php?func=detail&aid=98].
100. SAITO, T., W.-M. WANG, and T. NAKAGAWA. 2000. Cathaya (Pinaceae) pollen from Mio-Pliocene sediments in the Himi area, central Japan. Grana 39: 288-293.
101. SEWARD, A. C. 1919. Fossil plants, vol. 4. Cambridge University Press, Cambridge, UK.
102. SHANG, H., J.-Z. CUI, and C.-H. LI. 2001. Pityostrobus yixianensis sp. nov., a pinaceous cone from the Lower Cretaceous of north-east China. Botanical Journal of the Linnean Society 136: 427-437.
103. SIGURGEIRSSON, A., and A. E. S ZMIDT. 1993. Phylogenetic and biogeographic implications of chloroplast DNA variation in Picea. Nordic Journal of Botany 13: 233-246.
104. SILBA, J. 1986. Phytologia memoir 8: An international census of the Coniferae. Moldenke and Moldenke, Corvallis, Oregon, USA.
105. SLATT, R. M. 1974. Formation of palimpsest sediments, Conception Bay, southeastern Newfoundland. Geological Society of America Bulletin 85: 821-826.
106. SMITH, S. Y., and R. A. STOCKEY. 2001. A new species of Pityostrobus from the lower Cretaceous of California and its bearing on the evolution of Pinaceae. International Journal of Plant Sciences 162: 669-681.
107. SMITH, S. Y., and R. A. STOCKEY. 2002. Permineralized pine cones from the Cretaceous of Vancouver Island, British Columbia. International Journal of Plant Sciences 163: 185-196.
108. SOLTIS, P. S., D. E. SOLTIS, V. SAVOLAINEN, P. R. CRANE, and T. G. BARRACLOUGH. 2002. Rate heterogeneity among lineages of tracheophytes: Integration of molecular and fossil data and evidence form molecular living fossils. Proceedings of the National Academy of Sciences, USA 9: 4430-4435.
109. STOCKEY, R. A. 1981. Pityostrobus mcmurrayensis sp. nov., a permineralized pinaceous cone from the Cretaceous of Alberta. Canadian Journal of Botany 59: 75-82.
110. STOCKEY, R. A., G. W. ROTHWELL, and S. A. LITTLE. 2006. Relationships among fossil and living Dipteridaceae: Anatomically preserved Hausmannia from the Lower Cretaceous of Vancouver Island. International Journal of Plant Sciences 167: 649-663.
111. STOCKEY, R. A., and N. J. P. WIEBE. 2006. Mosaic evolution of Early Cretaceous Pinaceae and the origins of extant genera. Botany 2006: Annual Meeting of the Botanical Society of America in Chico, California, USA [online abstract http://www.2006.botanyconference.org/engine/search/index.php?func=detail&aid=569].
112. STOCKEY, R. A., and N. J. P. WIEBE. 2008. Lower Cretaceous conifers from Apple Bay, Vancouver Island: Picea -like leaves, Midoriphyllum piceoides gen. et sp. nov. (Pinaceae). Botany 86: 649-657.
113. SWEET, A. R. 2000. Applied research on two samples of Cretaceous age from Vancouver Island, British Columbia as requested by J. Haggart (GSC Pacific, Vancouver). Paleontological Report ARS-2000-02, Geological Survey of Canada, Natural Resources Canada/Ressources Naturelles Canada, Ottawa, Ontario, Canada.
114. WANG, X.-Q., D. C. TANK, and T. SANG. 2000. Phylogeny and divergence times in Pinaceae: Evidence from three genomes. Molecular Biology and Evolution 17: 773-778.
115. WILSON, L. R., and R. M. WEBSTER. 1946. Plant microfossils from a Fort Union coal of Montana. American Journal of Botany 33: 271-278