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VALVILOCULUS PLERISTAMINIS GEN. ET SP. NOV., A LAURALEAN FOSSIL FLOWER WITH VALVATE ANTHERS FROM MID-CRETACEOUS MYANMAR AMBER
by
Poinar, George O.
, Vega, Fernando E.
, Chambers, Kenton L.
, Iwaniec, Urszula T.
in
PALEOBOTANY
2020
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VALVILOCULUS PLERISTAMINIS GEN. ET SP. NOV., A LAURALEAN FOSSIL FLOWER WITH VALVATE ANTHERS FROM MID-CRETACEOUS MYANMAR AMBER
by
Poinar, George O.
, Vega, Fernando E.
, Chambers, Kenton L.
, Iwaniec, Urszula T.
in
PALEOBOTANY
2020
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VALVILOCULUS PLERISTAMINIS GEN. ET SP. NOV., A LAURALEAN FOSSIL FLOWER WITH VALVATE ANTHERS FROM MID-CRETACEOUS MYANMAR AMBER
Journal Article
VALVILOCULUS PLERISTAMINIS GEN. ET SP. NOV., A LAURALEAN FOSSIL FLOWER WITH VALVATE ANTHERS FROM MID-CRETACEOUS MYANMAR AMBER
2020
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Overview
The flower described here as Valviloculus pleristaminis, a new genus and species of fossil angiosperms, was obtained from Myanmar amber deposits dating to the mid-Cretaceous period. The flower is staminate, with an ovoid, hollow floral cup. The perianth consists of 6 tepals, one of which was lost prior to preservation. Numerous helically arranged stamens are borne at the summit of the flower. The anthers are bilocular, with pollen sacs that dehisce by laterally hinged valves. The tip of the connective bears a cup-shaped appendage. The gynoecium is represented only by a cluster of vestigial styles centered among the stamens. The fossil is provisionally assigned to order Laurales, its closest affinities being with the families Monimiaceae and Atherospermataceae.
La flor descrita aquí como Valviloculus pleristaminis, un nuevo género y especie de angiospermas fósiles, se obtuvo de depósitos de ámbar de Myanmar que datan del Cretácico medio. La flor es estaminada, con una copa floral ovoide, hueca. El perianto consiste en 6 tépalos, uno de los cuales se perdió antes de la conservación. Numerosos estambres dispuestos helicoidalmente nacen en el extremo de la flor. Las anteras son biloculares, con sacos polínicos dehiscentes por valvas unidas lateralmente. El extremo del conectivo lleva un apéndice acopado. El gineceo está representado solo por un grupo de estilos vestigiales centrados entre los estambres. El fósil se asigna provisionalmente al orden Laurales, sus afinidades más cercanas son con las familias Monimiaceae y Atherospermataceae.
Publisher
BRIT Press
Subject
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