| 
															 
														     | 
| [1] |  Asama K.1974. Weltrichia (male Williamsonia) from Ulu Endau, West Malaysia. In: T. Kobayashi, and R. Toriyama (Eds.), Geology and Palaeontology of Southeast Asia. Tokyo: Tokyo University Press, pp. 83-88. 
																														  | 
															
																													
															 | 
															 
														     | 
| [2] |  Banerji J.1992. Life and time of IndianWilliamsonia. The Paleobotanist 40: 245-259. 
																														  | 
															
																													
															 | 
															 
														     | 
| [3] |  Bose M.N.1967. Weltrichia singhii n. sp. from the Rajmahal Hills, Bihar. Current Science 36(2): 48-49. 
																														  | 
															
																													
															 | 
															 
														     | 
| [4] |  Bose M.N.,J. Banerji.1984. The fossil floras of Kachh. I — Mesozoic megafossils.The Palaeobotanist 33: 1-189. 
																														  | 
															
																													
															 | 
															 
														     | 
| [5] |  Braun C.F.W.1849. Weltrichia, eine neue Gattung fossiler Rhizantheen. Flora 32: 705-712. 
																														  | 
															
																													
															 | 
															 
														     | 
| [6] |  Delevoryas T.1991. Investigations of North American cycadeoids:Weltrichia and Williamsonia from the Jurassic of Oaxaca, Mexico. American Journal of Botany 78(2): 177-182. 
																														  | 
															
																													
															 | 
															 
														     | 
| [7] |  Delevoryas T.,R.E. Gould.1973. Investigations of North American cycadeoids: Williamsonian cones from the Jurassic of Oaxaca, Mexico.Review of Palaeobotany and Palynology 15(1): 27-42. 
																														  | 
															
																													
															 | 
															 
														     | 
| [8] |  Doyle J.2006. Seed ferns and the origins of angiosperms.Journal of the Torrey Botanical Society 133: 169-209. 
																														  | 
															
																													
															 | 
															 
														     | 
| [9] |  Florin R.1933. Studien uber die Cycadales des Mesozoikums. Zur kenntnis der Spaltungsapparate der Bennettitales Kungl.Svenska Vetenskapsakademiens Handlingar 12(5): 1-134 
																														  | 
															
																													
															 | 
															 
														     | 
| [10] | Friis E.M.,P. Crane, and A.K. Pedersen. 2011. Early Flowers and Angiosperm Evolution. Cambridge: Cambridge University Press. 
																														  | 
															
																													
															 | 
															 
														     | 
| [11] | Givulescu R.1990. Zwei neue Bennettitenblutten aus dem Unteren Lias von Anina (Banat, Rumanien).Documenta Naturae 59: 1-7. 
																														  | 
															
																													
															 | 
															 
														     | 
| [12] | Harris T.M.1932. The fossil flora of Scoresby Sound, East Greenland. Part 3: Caytoniales and Bennettitales.Meddelelser om Gronland 85: 1-133. 
																														  | 
															
																													
															 | 
															 
														     | 
| [13] | Harris T.M.1969. The Yorkshire Jurassic Flora. Part 3: Bennettitales. London: British Museum (Natural History). 
																														  | 
															
																													
															 | 
															 
														     | 
| [14] | Hilton J.,R.M. Bateman.2006. Pteridosperms are the backbone of seed plant phylogeny.Journal of the Torrey Botanical Society 133: 119-168. 
																														  | 
															
																													
															 | 
															 
														     | 
| [15] | Humml H.1969. Contribuţii la flora fosilă a Liasicului inferior de la Steierdorf-Anina.Studii şi cercetări de geologie, geofizică, geografie, Secţia geologie 14: 385-404. 
																														  | 
															
																													
															 | 
															 
														     | 
| [16] | Kimura T.,M.N. Bose, and H. Sakai.1985. Fossil plants from Taltung Formation, Palpa District, Nepal, Lesser Himalaya.Bulletin of the National Science Museum Series C (Geology and Paleontology) 11(4): 141-153. 
																														  | 
															
																													
															 | 
															 
														     | 
| [17] | Kimura T.,T. Ohana.1989. Late Jurassic plants from the Oginohama Formation, Oshika Group in the outer zone of Northeast Japan (II).Bulletin of the National Science Museum 15: 53-70. 
																														  | 
															
																													
															 | 
															 
														     | 
| [18] | Krasser F.1912. Williamsonia in Sardinien. Sitzungsber. Akad. Wissensch. in Wien 121: 943-973. 
																														  | 
															
																													
															 | 
															 
														     | 
| [19] | Krasser F.1913. Die fossile Flora derWilliamsonien bergenden Juraschichten von Sardinien. Anzeig. Akad. Wissensch. 4: 31-36. 
																														  | 
															
																													
															 | 
															 
														     | 
| [20] | Krasser F.1915. MännlicheWilliamsonien aus dem Sandsteinschiefer des unteren Lias von Steierdorf im Banat. Denkschriften der mathem.-naturw. Klasse 93: 1-18. 
																														  | 
															
																													
															 | 
															 
														     | 
| [21] | Krasser F.1917. Studien über die fertile Region der Cycadophyten aus den Lunzer-Schichten: Mikrosporophylle und männliche Zapfen.Denkschriften der mathem.-naturw. Klasse 94: 489-554. 
																														  | 
															
																													
															 | 
															 
														     | 
| [22] | Krasser F.1919. Ein neuen Typus einen mannlichenWilliamsonia - Becherblute aus der Alpinen Trias. Sitzungsberichte der Akademie der Wissenschaften Wien, Math. natw. Kl. Abt I 128: 1-10. 
																														  | 
															
																													
															 | 
															 
														     | 
| [23] | Krasser F.1922. Zur Kenntnis einiger fossiler Floren des unteren Lias den Sukzessionstaaten von Ostereich-Ungarn.Sitzungsberichte d. mathem.-naturw. Kl. 1: 345-373. 
																														  | 
															
																													
															 | 
															 
														     | 
| [24] | Li N.,Y. Li,L.X. Wang,S.L. Zheng, and W. Zhang.2004. A new species ofWeltrichia Braun in North China with a special bennettitalean male reproductive organ. Acta Botanica Sinica 46(11): 1269-1275. 
																														  | 
															
																													
															 | 
															 
														     | 
| [25] | Nathorst A.G.,1880. Nagra anmarkningar om Williamsonia Carruthers.Ofversight Kongl. Ventenskaps - Akademiens Forhandlingar 9: 3-52. 
																														  | 
															
																													
															 | 
															 
														     | 
| [26] | Nathorst A.G.1909. Palaobotanische mitteilungen. 8. UberWilliamsonia, Wielandia, Cycadocephalus und Weltrichia. Kungl. Svenska Vetenskapsakademiens Handlingar 45: 1-38. 
																														  | 
															
																													
															 | 
															 
														     | 
| [27] | Nathorst A.G.1911a. Paleobotanische Mitteilungen. 9. Neue Beitrage zur Kenntnis derWilliamsonia-Blutten. Kungl. Svenska Vetenskapsakademiens Handlingar 46: 1-33. 
																														  | 
															
																													
															 | 
															 
														     | 
| [28] | Nathorst A.G.1911b. Bemerkungen uberWeltrichia Fr. Braun. Arkiv fur Botanik 11: 1-10. 
																														  | 
															
																													
															 | 
															 
														     | 
| [29] | Nathorst A.G.1912. Die Mikrosporophylle vonWilliamsonia. Arkiv fur Botanik 12: 1-10. 
																														  | 
															
																													
															 | 
															 
														     | 
| [30] | Nathorst A.G.1913. How are the namesWilliamsonia and Wielandiella to be used? A question of nomenclature. Geologiska foreningens Forhandlingar 35: 361-366. 
																														  | 
															
																													
															 | 
															 
														     | 
| [31] | Person C.P.,T. Delevoryas.1982. The Middle Jurassic flora of Oaxaca, Mexico.Palaeontographica Abteilung B 180(4-6): 82-119. 
																														  | 
															
																													
															 | 
															 
														     | 
| [32] | Pal A.K.,S.C. Ghosh.1985. Weltrichia (male Williamsonia) from the borehole samples of Malda, West Bengal. 54: 574-576. 
																														  | 
															
																													
															 | 
															 
														     | 
| [33] | Popa M.E.1997. Corystospermal pteridosperms in the Liassic continental deposits of Romania.Acta Palaeontologica Romaniae 1: 81-87. 
																														  | 
															
																													
															 | 
															 
														     | 
| [34] | Popa M.E.2000. Early Jurassic Land Flora of the Getic Nappe, Faculty of Geology and Geophysics. Bucharest: University of Bucharest, unpublished PhD thesis, 258 pp. 
																														  | 
															
																													
															 | 
															 
														     | 
| [35] | Popa M.E.2001. Aspects of Romanian Early Jurassic palaeobotany and palynology. Part IV. A new species ofWeltrichia from Anina. Studia Universitatis Babeş-Bolyai, Geologie 46: 69-76. 
																														  | 
															
																													
															 | 
															 
														     | 
| [36] | Popa M.E.2014. Early Jurassic bennettitalean reproductive structures of Romania.Palaeobiodiversity and Palaeoenvironments 94(2): 327-362. 
																														  | 
															
																													
															 | 
															 
														     | 
| [37] | Popa M.E.,A. Zaharia.2011. Early Jurassic ovipositories on bennettitalean leaves from Romania.Acta Palaeontologica Romaniae 7: 285-290. 
																														  | 
															
																													
															 | 
															 
														     | 
| [38] | Pott C.2014. A revision ofWielandiella angustifolia, a shrub-sized bennettite from the Rhaetian-Hettangian of Scania, Sweden, and Jameson Land, Greenland. International Journal of Plant Sciences 175(4): 467-499. 
																														  | 
															
																													
															 | 
															 
														     | 
| [39] | Pott C.,T. Fischer, and B. Aschauer.2017. Lunzia austriaca - a bennettitalean microsporangiate structure with Cycadopites-like in situ pollen from the Carnian (Upper Triassic) of Lunz, Austria. Grana 56: 321-338. 
																														  | 
															
																													
															 | 
															 
														     | 
| [40] | Pott C.,M. Krings,H. Kerp, and E.M. Friis.2010. Reconstruction of a bennettitalean flower from the Carnian (Upper Triassic) of Lunz, Lower Austria.Review of Palaeobotany and Palynology 159(1): 94-111. 
																														  | 
															
																													
															 | 
															 
														     | 
| [41] | Pott C.,C.C. Labandeira,M. Krings, and H. Kerp.2008. Fossil insect eggs and ovipositional damage on bennettitalean leaf cuticles from the Carnian (Upper Triassic) of Austria.Journal of Paleontology 82(4): 778-789. 
																														  | 
															
																													
															 | 
															 
														     | 
| [42] | Pott C.,S. McLoughlin,S.Q. Wu, and E.M. Friis.2012. Trichomes on the leaves ofAnomozamites villosus sp. nov.(Bennettitales) from the Daohugou beds (Middle Jurassic), Inner Mongolia, China: Mechanical defence against herbivorous arthropods. Review of Palaeobotany and Palynology 169: 48-60. 
																														  | 
															
																													
															 | 
															 
														     | 
| [43] | Pott C., Schmeissner S., Dutsch G., Van Konijnenburg-van Cittert J.H.A.2016. Bennettitales in the Rhaetian flora of Wustenwelsberg, Bavaria, Germany.Review of Palaeobotany and Palynology 232: 98-118. 
																														  | 
															
																													
															 | 
															 
														     | 
| [44] | Saporta G.D.1891. Paléontologie française. Plantes jurassiques Paris: Masson. 
																														  | 
															
																													
															 | 
															 
														     | 
| [45] | Scanu G.G.,E. Kustatscher, and P. Pittau.2012. The Jurassic plant fossils of the Lovisato Collection: Preliminary notes.Bollettino della Società Paleontologica Italiana 51: 71-84. 
																														  | 
															
																													
															 | 
															 
														     | 
| [46] | Schuster J.1911. Weltrichia und die Bennettitales. Kungl. Svenska Vetenskapsakademiens Handlingar 46: 1-57. 
																														  | 
															
																													
															 | 
															 
														     | 
| [47] | Schweitzer H.-J.1977. Die Rhato-Jurassischen Floren des Iran und Afganistans 4. Die ratische ZwitterbluteIrania hermaphroditica nov. spec. und ihre Bedenirtrung fur die Phylogenie du Angiospermen. Palaeontographica Abteilung B 161: 98-145. 
																														  | 
															
																													
															 | 
															 
														     | 
| [48] | Schweitzer H.-J.,M. Kirchner.2003. Die Rhato-Jurassichen Floren des Iran und Afghanistans. 13. Cycadophyta III. Bennettitales.Palaeontographica Abteilung B 264: 1-166. 
																														  | 
															
																													
															 | 
															 
														     | 
| [49] | Seward A.C.1900. Catalogue of the Mesozoic Plants in the Department of Geology, British Museum (Natural History). The Jurassic Flora, I - The Yorkshire Coast. London: British Museum. 
																														  | 
															
																													
															 | 
															 
														     | 
| [50] | Sharma B.1969. Further observations onWilliamsonia santalensis Sitholey and Bose with the description of a new species. Palaeontographica Abteilung B 125: 92-102. 
																														  | 
															
																													
															 | 
															 
														     | 
| [51] | Sharma B.1971. On a collection of bennettitalean stems and fructifications from Amarjola in the Rajmahal Hills, India.Palaeontographica Abteilung B 135: 48-52. 
																														  | 
															
																													
															 | 
															 
														     | 
| [52] | Sharma B.D.1977. Indian Williamsonias: An illustrated review.Acta Palaeontologica Polonica 18: 19-29. 
																														  | 
															
																													
															 | 
															 
														     | 
| [53] | Silva Pineda A., M.P. Velasco de León, Gil, J.A., andJ.R. Grimaldo.2011. Una nueva especie de Weltrichia (Bennettitales) del Jurásico Medio de la Formación Tecomazuchil (Oaxaca, México), Geobios. Lyon: Elsevier, pp. 519-525. 
																														  | 
															
																													
															 | 
															 
														     | 
| [54] | Sitholey R.,M.N. Bose.1953. Williamsonia santalensis sp. nov., a male fructification from the Rajmahal Hills with remarks on Ontheanthus polyandra Ganju. The Palaeobotanist 2: 29-39. 
																														  | 
															
																													
															 | 
															 
														     | 
| [55] | Sitholey R.,M.N. Bose.1971. Weltrichia santalensis(Sitholey & Bose) and other bennettitalean male fructifications from India. Palaeontographica Abteilung B 131: 151-159. 
																														  | 
															
																													
															 | 
															 
														     | 
| [56] | Stewart W.N.1983. Paleobotany and the Evolution of Plants. Cambridge: Cambridge University Press. 
																														  | 
															
																													
															 | 
															 
														     | 
| [57] | Sun G.,S.L. Zheng, D.L. Dilcher, Y.D. Wang, and S.H. Mei. 2001. Early Angiosperms and Their Associated Plants from Western Liaoning, China, 1st Edition. Shanghai: Scientific and Technological Education Publishing House (in Chinese). 
																														  | 
															
																													
															 | 
															 
														     | 
| [58] | Taylor T.N.,E.L. Taylor, and M. Krings.2009. Paleobotany: The Biology and Evolution of Fossil Plants. Amsterdam: Elsevier. 
																														  | 
															
																													
															 | 
															 
														     | 
| [59] | Thomas H.H.1915. On some new and rare Jurassic plants from Yorkshire: The male flower ofWilliamsonia gigas(Lindl. & Hutt.). Proceedings of the Cambridge Philosophical Society 69: 223-251. 
																														  | 
															
																													
															 | 
															 
														     | 
| [60] | Thomas H.H.,N. Bancroft.1913. On the cuticles and fossil cycadean fronds.Transactions of the Linnean Society of London 8: 155-204. 
																														  | 
															
																													
															 | 
															 
														     | 
| [61] | Van Konijnenburg-van Cittert, J.H.A.2008. The Jurassic fossil plant record of the UK area.Proceedings of the Geologists' Association 119(1): 59-72. 
																														  | 
															
																													
															 | 
															 
														     | 
| [62] | Velasco de Leon M.P., Ortiz-Martinez E.L., Silva Pineda A.2012. La distribucion de las Bennettitales y sus estructuras reproductoras en el terreno Mixteco.Paleontologia Mexicana 62: 159-165. 
																														  | 
															
																													
															 | 
															 
														     | 
| [63] | Wieland G.R.1906. American Fossil Cycads, volume 1. Carnegie Institution of Washington Publication 34, 256 pp. 
																														  | 
															
																													
															 | 
															 
														     | 
| [64] | Wieland G.R.1914-1916. La flora liasica de la Mixteca Alta.Boletin del Instituto Geologico de Mexico 31: 1-165. 
																														  |