Abstract
A heterosporous lycopsid plant is described from the Upper Devonian (Famennian) Wutong Formation, Changxing County, northern Zhejiang Province, China. The plant is known for its terminal and many detached megasporangiate strobili, most of which do not have sporophylls preserved. Some megasporangiate strobili are closely associated with a vegetative axis bearing leaf cushions and with a mass of microspores. Because of the monosporangiate strobili, the present lycopsid belongs to the Dichostrobiles of the Isoёtales sensu lato. This lycopsid conforms to Changxingia in the vegetative leaves, leaf cushions (including leaf scar and ligule pit), some parts of the megasporophyll (pedicel, heel and lamina), the megasporangium and the megaspores, although the branching pattern of axes, the arrangement and other parts of megasporophyll are still unknown. The fossils are described as Changxingia sp., and this genus is expanded with character of microspore. Hence, the previous and present data indicate that the earliest lycopsids with monosporangiate strobili from the Upper Devonian of China are consistent in Lagenicula megaspores with gula and Lycospora microspores with equatorial cingulum. In contrast, the Carboniferous lycopsids with monosporangiate strobili in Euramerica and Cathaysia show great diversification of both megaspores and microspores.
Similar content being viewed by others
References
Balme BE (1995) Fossil in situ spores and pollen grains: an annotated catalogue. Rev Palaeobot Palynol 87:81–323
Bateman RM (1992) Morphometric reconstruction, palaeobiology and phylogeny of Oxroadia gracilis Alvin emend. and O. conferta sp. nov.: anatomically-preserved rhizomorphic lycopsids from the Dinantian of Oxroad Bay, SE Scotland. Palaeontogr Abt B 228:29–103
Bek J (2012) A review of the genus Lycospora. Rev Palaeobot Palynol 174:122–135
Brack-Hanes SD (1981) On a lycopsid cone with winged spores. Bot Gaz 142:294–304
Courvoisier JM, Phillips TL (1975) Correlation of spores from Pennsylvanian coal-ball fructifications with dispersed spores. Micropaleontology 21:45–59
Deng Z-Z, Huang P, Liu L, Wang D-M, Xue J-Z (2016) New observations of Sphenophyllum pseudotenerrimum Sze (Sphenopsida) from the Late Devonian of South China. Acta Palaeontol Sin 55:45–55
DiMichele WA, Bateman RM (1996) The rhizomorphic lycopsids: a case-study in paleobotanical classification. Syst Bot 21:535–552
Felix CJ (1954) Some American arborescent lycopod fructifications. Ann Missouri Bot Gard 41:351–394
Feng B-C, Rothwell GW (1989) Microsporangiate cones of Mazocarpon bensonii (Lycopsida) from the Upper Pennsylvanian of the Appalachian basin. Rev Palaeobot Palynol 57:289–297
Feng Z, Wang J, Bek J (2008) Nudasporestrobus ningxicus gen. et sp. nov., a novel sigillarian megasporangiate cone from the Bashkirian (Early Pennsylvanian) of Ningxia, northwestern China. Rev Palaeobot Palynol 149:150–162
Leisman GA, Phillips TL (1979) Megasporangiate and microsporangiate cones of Achlamydocarpon varius from the Middle Pennsylvanian. Palaeontogr Abt B 168:100–128
Liu L, Wang D-M, Xue J-Z, Meng M-C (2015) An anatomically preserved lycopsid from the Upper Devonian of South China. Hist Biol 27:308–315
Meng M-C, Wang D-M, Xue J-Z, Zhu X (2013) New insights and evolutionary significance of the megasporangiate strobilus of Minostrobus chaohuensis (Lycopsida) from the Upper Devonian of South China. Rev Palaeobot Palynol 190:20–40
Meng M-C, Wang D-M, Tian T (2014) New insights of the megasporangiate strobilus of Sublepidodendron songziense from the Upper Devonian of Hubei Province. Acta Palaeontol Sin 53:180–190
Meng M-C, Wang D-M, Yao J-X (2015) Vegetative characters, growth habit and microsporangiate strobilus of lycopsid Minostrobus chaohuensis. PloS ONE 10(3):e0122167
Meng M-C, Liu L, Wang D-M, Yao J-X (2016) Growth architecture and microsporangiate strobilus of Sublepidodendron grabaui (Lycopsida) from the Late Devonian of South China. Rev Palaeobot Palynol 224:83–93
Ramanujam CGK, Stewart WN (1969) A Lepidocarpon cone tip from the Pennsylvanian of Illinois. Palaeontogr Abt B 127:159–167
Schopf JM (1941) Mazocarpon oedipternum, sp. nov. and sigillarian relationships. Ill State Geol Surv Rep Invest 75:1–53
Taylor TN, Taylor EL, Krings M (2009) Paleobotany: the biology and evolution of fossil plants, 2nd edn. Academic Press, Burlington
Wang Y (2001) A new lycopsid megaspore cone from the Upper Devonian of Chaohu, China. Bot J Linn Soc 136:439–448
Wang Y, Xu H-H (2005) Sublepidodendron grabaui comb. nov., a lycopsid from the Upper Devonian of China. Bot J Linn Soc 149:299–311
Wang Q, Li C-S, Geng B-Y, Chitaley S (2003a) A new species of Lepidostrobus from the Upper Devonian of Xinjiang, China and its bearing on the phylogenetic significance of the order Isoëtales. Bot J Linn Soc 143:55–67
Wang Q, Hao S-G, Wang D-M, Wang Y, Denk T (2003b) A Late Devonian arborescent lycopsid Sublepidodendron songziense Chen emend. (Sublepidodendraceae Kräusel et Weyland 1949) from China, with a revision of the genus Sublepidodendron (Nathorst) Hirmer 1927. Rev Palaeobot Palynol 127:269–305
Wang Y, Xu H-H, Wang Q (2012) Re-study of Minostrobus chaohuensis Wang (Lycopsida) from the Upper Devonian of Anhui, South China. Palaeoworld 21:20–28
Wang D-M, Meng M-C, Xue J-Z, Basinger JF, Guo Y, Liu L (2014a) Changxingia longifolia gen. et sp. nov., a new lycopsid from the Late Devonian of Zhejiang Province, South China. Rev Palaeobot Palynol 203:35–47
Wang D-M, Liu L, Meng M-C, Xue J-Z, Liu T, Guo Y (2014b) Cosmosperma polyloba gen. et sp. nov., a seed plant from the Upper Devonian of South China. Naturwissenschaften 101:615–622
Willard DA (1989) Source plants for Carboniferous microspores: Lycospora from permineralized Lepidostrobus. Amer J Bot 76:820–827
Wu X-Y (1995) Carboniferous floras. In: Li X-X (ed) Fossil floras of China through the geological ages. Guangdong Science and Technology Press, Guangzhou, pp 78–126
Xue J-Z (2011) Phylogeny of Devonian lycopsids inferred from Bayesian phylogenetic analyses. Acta Geol Sin (English Edition) 85:569–580
Zhou Y-L, Wang S-J, Hilton J, Tian B-L (2008) Anatomically preserved lepidodendralean plants from lower Permian coal balls of northern China: Achlamydocarpon intermedium sp. nov. Pl Syst Evol 273:71–85
Acknowledgments
The authors are grateful to D. L. Qi (Anhui Geological Survey, Hefei) and T. Liu (Peking University) for their help with the field work and would like to thank J. Z. Xue (Peking University) and H. Kerp (University of Münster) for important discussions and improvements. This work is supported by the National Basic Research Program of China (Grant No. 2012CB821900) of the Ministry of Science and Technology of China.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no conflict of interest.
Human and animal rights
This article does not contain any studies with human participants or animals performed by any of the authors. Formal consent is not required for this type of study.
Additional information
Handling Editor: Jochen Heinrichs.
Rights and permissions
About this article
Cite this article
Wang, DM., Qin, M., Meng, MC. et al. New insights into the heterosporous lycopsid Changxingia from the Upper Devonian Wutong Formation of Zhejiang Province, China. Plant Syst Evol 303, 11–21 (2017). https://doi.org/10.1007/s00606-016-1348-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00606-016-1348-9