Plant Systematics and Evolution

, Volume 241, Issue 1–2, pp 77–88

Sinocarpus decussatus gen. et sp. nov., a new angiosperm with basally syncarpous fruits from the Yixian Formation of Northeast China

Article

DOI: 10.1007/s00606-003-0028-8

Cite this article as:
Leng, Q. & Friis, E. Plant Syst. Evol. (2003) 241: 77. doi:10.1007/s00606-003-0028-8

Abstract

An Early Cretaceous angiosperm, Sinocarpus decussatus gen. et sp. nov., is described from the Yixian Formation in Liaoning, China, based on an infructescence fragment. It is probably ebracteate, consisting of one terminal fruit and two pairs of pedicellate lateral fruits arranged decussately. Carpels are probably borne on a small convex receptacle. There are no distinct remnants of a perianth although fragments observed at the base of immature fruits may represent perianth parts. No remnants of androecial parts have been observed, and it is unknown whether the flowers were unisexual or bisexual. The basally syncarpous ovary is superior and composed of 3 or 4 carpels. Each carpel contains about 10 anatropous ovules/seeds borne along the linear placentae. Seeds are flattened and embedded in a thick amorphous material. The character combination of Sinocarpus indicates a systematic position among the basal grade of eudicots or the basal core eudicots, and particularly shows similarities to extant Ranunculaceae, Buxaceae, and Myrothamnaceae, but based on the available data the fossil cannot unambiguously be placed in any modern family.

Keywords

Sinocarpus decussatus fossil infruct-escence angiosperms eudicots Yixian Formation Cretaceous 

Copyright information

© Springer-Verlag Wien 2003

Authors and Affiliations

  1. 1.Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjingThe People’s Republic of China
  2. 2.Department of PalaeobotanySwedish Museum of Natural HistorySweden

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