Arlenea delicata gen.et sp.nov.,a new ephedroid plant from the Early Cretaceous Crato Formation,Araripe Basin,Northeast Brazil

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外文摘要：Ephedroid macrofossils have been widely documented in Cretaceous deposits,including numerous from the Lower Cretaceous Yixian Formation of NE China.However,few ephedroid macrofossils have been reported from South America.Herein,we describe a new plant of the family Ephedraceae,Arlenea del-icata gen.et sp.nov.,from the Lower Cretaceous Crato Formation of the Araripe Basin,Northeast Brazil,based on the vegetative and reproductive structures.It has the typical morphological characteristics of ephedroid plants,including fertile reproductive branches,opposite phyllotaxy,terminal female cones,a sympodial branching system,longitudinally striated internodes,and swollen nodes.Our new finding is unusual in having inner chlamydosperms subtended by two pairs of bracts,reproductive units connected to branches through swollen receptacles and a smooth seed surface.This new ephedroid taxon from the Crato Formation increases our understanding of plant diversity of this group during the Early Cretaceous.Furthermore,the general morphology(fleshy bracts and enlarged receptacles)of this new fossil dis-covery indicates that seeds of this plant may have been dispersed by animals such as pterosaurs(mainly the Tapejaridae)and birds(Enantiomithes and Ornituromorpha).If true,this would explain the cosmopolitan distribution of Ephedraceae in the Lower Cretaceous.

外文关键词：

Early CretaceousGnetophytesArlenea delicataEphedralesCrato Formation

作者：

Alita Maria Neves Ribeiro、Yong Yang、Ant?nio álamo Feitosa Saraiva、Renan Alfredo Machado Bantim、Jo?o Tavares Calixto Junior、Flaviana Jorge de Lima

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作者单位：

Programa de Pós-Graduação em Diversidade Biológica e Recursos Naturais,Universidade Regional do Cariri,Rua Carolino Sucupira,Pimenta,63105-160,Crato,Ceará,Brazil

Laboratório de Paleontologia,Universidade Regional do Cariri,Rua Carolino Sucupira,Pimenta,63105-160,Crato,Ceará,Brazil

Co-Innovation Center for Sustainable Forestry in Southern China,College of Biology and the Environment,159 Longpan Road,Nanjing Forestry University,Nanjing,210037,China

Programa de Pós-Graduação em Geociências(PPGEOC),Universidade Federal de Pernambuco(UFPE),Rua Av.da Arquitetura,S/n° CEP-50740-550,Cidade Universitária,Recife,Pernambuco,Brazil

Laboratório de Estudos da Flora Regional,Universidade Regional do Cariri,Rua Carolino Sucupira,Pimenta,63105-160,Crato,Ceará,Brazil

Gondwanan Plants Lab,Universidade Federal de Pernambuco,Centro Academico de Vitória,Rua Do Alto Reservatório S/n,Bela Vista,55608-680,Vitória de Santo Antão,Pernambuco,Brazil

Programa de Pós-Graduação em Geociências(PPGEOC),Universidade Federal de Pernambuco(UFPE),Rua Av.da Arquitetura,S/n° CEP-50740-550,Cidade Universitária,Recife,Pernambuco,Brazi

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基金：

Conselho Nacional de Desenvolvimento Científico e Tecnológico CNPq ProcessonCoordena??o de Aperfei?oamento de Pessoal de Nível Superior-CAPES for the financial support grantFunda??o Cearense de Apoio ao Desenvolvimento Científico e Tecnológico-FUNCAP for the financial support grant to R.A.M.BantiA.A.F.Saraiva

项目编号：

406902/2022-4INCT PALEOVERT88887520216/2020-00BMD-0124-00302.01.01/19BP3-013900202.01.00/18

出版年：

2024

DOI：

10.1016/j.pld.2023.06.008

植物多样性(英文)

中国科学院昆明植物研究所，中国植物学会

植物多样性(英文)

CSTPCD

影响因子：0.617

ISSN：2096-2703

年,卷(期)：2024.46(3)