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Phytogeographical implications of the probable occurrence of the gnetalean plant Welwitschiophyllum in the Late Cretaceous (Cenomanian) of Africa

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Phytogeographical implications of the probable occurrence of the gnetalean plant Welwitschiophyllum in the Late Cretaceous (Cenomanian) of Africa. / Roberts, Emily A.; Martill, David M.; Loveridge, Robert F.

In: Proceedings of the Geologists' Association, 14.11.2019.

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@article{380e92fd7a43484c8a093f74a99ee0a2,
title = "Phytogeographical implications of the probable occurrence of the gnetalean plant Welwitschiophyllum in the Late Cretaceous (Cenomanian) of Africa",
abstract = "A new fossil plant specimen, identified as a probable leaf of Welwitschiophyllum Dilcher et al. (2005) is reported from the Gara Sbaa Member of the? Lower Cenomanian to Turonian Akrabou Formation of south east Morocco. Previously Welwitschiophyllum was only known from the Early Cretaceous of Brazil, and this discovery considerably extends its temporal and geographical ranges. It is identified on account of its characteristic elongate shape, entire margins, parallel venation and an arcuate margin of the base. The new specimen expands our knowledge of the poorly-known Gara Sbaa florule, and is the first possible gnetophyte recorded from this locality, adding crucial knowledge to African Cretaceous floral diversity. Comparison with similar leaf types from the Aptian-aged Nova Olinda Member of the Crato Formation of north east Brazil hint at a xerophytic or perhaps halophilic floral province in equatorial Gondwana prior to the opening of the South Atlantic Ocean. This province is at least 3500 km from north to south.",
keywords = "Cretaceous, flora, Welwitschiophyllum, Akrabou Formation, Morocco, Brazil, palaeobiogeography",
author = "Roberts, {Emily A.} and Martill, {David M.} and Loveridge, {Robert F.}",
year = "2019",
month = nov,
day = "14",
doi = "10.1016/j.pgeola.2019.10.002",
language = "English",
journal = "Proceedings of the Geologists' Association",
issn = "0016-7878",
publisher = "Geological Society of London",

}

RIS

TY - JOUR

T1 - Phytogeographical implications of the probable occurrence of the gnetalean plant Welwitschiophyllum in the Late Cretaceous (Cenomanian) of Africa

AU - Roberts, Emily A.

AU - Martill, David M.

AU - Loveridge, Robert F.

PY - 2019/11/14

Y1 - 2019/11/14

N2 - A new fossil plant specimen, identified as a probable leaf of Welwitschiophyllum Dilcher et al. (2005) is reported from the Gara Sbaa Member of the? Lower Cenomanian to Turonian Akrabou Formation of south east Morocco. Previously Welwitschiophyllum was only known from the Early Cretaceous of Brazil, and this discovery considerably extends its temporal and geographical ranges. It is identified on account of its characteristic elongate shape, entire margins, parallel venation and an arcuate margin of the base. The new specimen expands our knowledge of the poorly-known Gara Sbaa florule, and is the first possible gnetophyte recorded from this locality, adding crucial knowledge to African Cretaceous floral diversity. Comparison with similar leaf types from the Aptian-aged Nova Olinda Member of the Crato Formation of north east Brazil hint at a xerophytic or perhaps halophilic floral province in equatorial Gondwana prior to the opening of the South Atlantic Ocean. This province is at least 3500 km from north to south.

AB - A new fossil plant specimen, identified as a probable leaf of Welwitschiophyllum Dilcher et al. (2005) is reported from the Gara Sbaa Member of the? Lower Cenomanian to Turonian Akrabou Formation of south east Morocco. Previously Welwitschiophyllum was only known from the Early Cretaceous of Brazil, and this discovery considerably extends its temporal and geographical ranges. It is identified on account of its characteristic elongate shape, entire margins, parallel venation and an arcuate margin of the base. The new specimen expands our knowledge of the poorly-known Gara Sbaa florule, and is the first possible gnetophyte recorded from this locality, adding crucial knowledge to African Cretaceous floral diversity. Comparison with similar leaf types from the Aptian-aged Nova Olinda Member of the Crato Formation of north east Brazil hint at a xerophytic or perhaps halophilic floral province in equatorial Gondwana prior to the opening of the South Atlantic Ocean. This province is at least 3500 km from north to south.

KW - Cretaceous

KW - flora

KW - Welwitschiophyllum

KW - Akrabou Formation

KW - Morocco

KW - Brazil

KW - palaeobiogeography

U2 - 10.1016/j.pgeola.2019.10.002

DO - 10.1016/j.pgeola.2019.10.002

M3 - Article

JO - Proceedings of the Geologists' Association

JF - Proceedings of the Geologists' Association

SN - 0016-7878

ER -

ID: 16766081