IEGEBA   24053
INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BUENOS AIRES
Unidad Ejecutora - UE
artículos
Título:
Arecaceae Fossil Fruits from the Paleocene of Patagonia, Argentina
Autor/es:
FUTEY, GANDOLFO, ZAMALOA, CUNEO, CLADERA
Revista:
BOTANICAL REVIEW
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2012 vol. 78 p. 205 - 234
ISSN:
0006-8101
Resumen:
Abstract We describe fossil fruits collected from outcrops of the Salamanca Fm.
(Paleocene, Danian, 63.3?61.9 Ma) at the Estancia Las Violetas locality, Chubut,
Argentina that show affinities with members of the Subtribe Attaleinae, Tribe Cocoseae,
Subfamily Arecoideae within the Arecaceae. The fossils are preserved as permineralizations,
and were examined by longitudinal, tangential and cross-sections, as well as by the
application of Computed Tomography Scanning technology (CT Scan). The fruits are
ovoid drupes with 3 longitudinal grooves delimiting three valves; displaying apical
stigmatic remains and a single apical germination pore. The exocarp and mesocarp are
fused and anatomically indistinguishable one from another; they contain longitudinal
fibrous bands with brachysclereids. A centrally placed seed occupies the single locule
entirely; the seeds are deltoid with a basal hilum and acuminate tip while the endosperm is
ruminate. The taxonomic position of the fossils was explored using phylogenetic analyses
of molecular sequences combined with morphological data. Along with the suite of
morphological characters that points to an affinity with the Subtribe Attaleinae, Tribe
Cocoseae, subfamily Arecoideae, the results of the combined phylogenetic analyses
confirm the taxonomic placement. This report constitutes the first confirmed record for
the Subtribe Attaleinae worldwide and the first record of fossil palm fruits from Argentina.
Argentina that show affinities with members of the Subtribe Attaleinae, Tribe Cocoseae,
Subfamily Arecoideae within the Arecaceae. The fossils are preserved as permineralizations,
and were examined by longitudinal, tangential and cross-sections, as well as by the
application of Computed Tomography Scanning technology (CT Scan). The fruits are
ovoid drupes with 3 longitudinal grooves delimiting three valves; displaying apical
stigmatic remains and a single apical germination pore. The exocarp and mesocarp are
fused and anatomically indistinguishable one from another; they contain longitudinal
fibrous bands with brachysclereids. A centrally placed seed occupies the single locule
entirely; the seeds are deltoid with a basal hilum and acuminate tip while the endosperm is
ruminate. The taxonomic position of the fossils was explored using phylogenetic analyses
of molecular sequences combined with morphological data. Along with the suite of
morphological characters that points to an affinity with the Subtribe Attaleinae, Tribe
Cocoseae, subfamily Arecoideae, the results of the combined phylogenetic analyses
confirm the taxonomic placement. This report constitutes the first confirmed record for
the Subtribe Attaleinae worldwide and the first record of fossil palm fruits from Argentina.
(Paleocene, Danian, 63.3?61.9 Ma) at the Estancia Las Violetas locality, Chubut,
Argentina that show affinities with members of the Subtribe Attaleinae, Tribe Cocoseae,
Subfamily Arecoideae within the Arecaceae. The fossils are preserved as permineralizations,
and were examined by longitudinal, tangential and cross-sections, as well as by the
application of Computed Tomography Scanning technology (CT Scan). The fruits are
ovoid drupes with 3 longitudinal grooves delimiting three valves; displaying apical
stigmatic remains and a single apical germination pore. The exocarp and mesocarp are
fused and anatomically indistinguishable one from another; they contain longitudinal
fibrous bands with brachysclereids. A centrally placed seed occupies the single locule
entirely; the seeds are deltoid with a basal hilum and acuminate tip while the endosperm is
ruminate. The taxonomic position of the fossils was explored using phylogenetic analyses
of molecular sequences combined with morphological data. Along with the suite of
morphological characters that points to an affinity with the Subtribe Attaleinae, Tribe
Cocoseae, subfamily Arecoideae, the results of the combined phylogenetic analyses
confirm the taxonomic placement. This report constitutes the first confirmed record for
the Subtribe Attaleinae worldwide and the first record of fossil palm fruits from Argentina.
Argentina that show affinities with members of the Subtribe Attaleinae, Tribe Cocoseae,
Subfamily Arecoideae within the Arecaceae. The fossils are preserved as permineralizations,
and were examined by longitudinal, tangential and cross-sections, as well as by the
application of Computed Tomography Scanning technology (CT Scan). The fruits are
ovoid drupes with 3 longitudinal grooves delimiting three valves; displaying apical
stigmatic remains and a single apical germination pore. The exocarp and mesocarp are
fused and anatomically indistinguishable one from another; they contain longitudinal
fibrous bands with brachysclereids. A centrally placed seed occupies the single locule
entirely; the seeds are deltoid with a basal hilum and acuminate tip while the endosperm is
ruminate. The taxonomic position of the fossils was explored using phylogenetic analyses
of molecular sequences combined with morphological data. Along with the suite of
morphological characters that points to an affinity with the Subtribe Attaleinae, Tribe
Cocoseae, subfamily Arecoideae, the results of the combined phylogenetic analyses
confirm the taxonomic placement. This report constitutes the first confirmed record for
the Subtribe Attaleinae worldwide and the first record of fossil palm fruits from Argentina.
We describe fossil fruits collected from outcrops of the Salamanca Fm.
(Paleocene, Danian, 63.3?61.9 Ma) at the Estancia Las Violetas locality, Chubut,
Argentina that show affinities with members of the Subtribe Attaleinae, Tribe Cocoseae,
Subfamily Arecoideae within the Arecaceae. The fossils are preserved as permineralizations,
and were examined by longitudinal, tangential and cross-sections, as well as by the
application of Computed Tomography Scanning technology (CT Scan). The fruits are
ovoid drupes with 3 longitudinal grooves delimiting three valves; displaying apical
stigmatic remains and a single apical germination pore. The exocarp and mesocarp are
fused and anatomically indistinguishable one from another; they contain longitudinal
fibrous bands with brachysclereids. A centrally placed seed occupies the single locule
entirely; the seeds are deltoid with a basal hilum and acuminate tip while the endosperm is
ruminate. The taxonomic position of the fossils was explored using phylogenetic analyses
of molecular sequences combined with morphological data. Along with the suite of
morphological characters that points to an affinity with the Subtribe Attaleinae, Tribe
Cocoseae, subfamily Arecoideae, the results of the combined phylogenetic analyses
confirm the taxonomic placement. This report constitutes the first confirmed record for
the Subtribe Attaleinae worldwide and the first record of fossil palm fruits from Argentina.
Argentina that show affinities with members of the Subtribe Attaleinae, Tribe Cocoseae,
Subfamily Arecoideae within the Arecaceae. The fossils are preserved as permineralizations,
and were examined by longitudinal, tangential and cross-sections, as well as by the
application of Computed Tomography Scanning technology (CT Scan). The fruits are
ovoid drupes with 3 longitudinal grooves delimiting three valves; displaying apical
stigmatic remains and a single apical germination pore. The exocarp and mesocarp are
fused and anatomically indistinguishable one from another; they contain longitudinal
fibrous bands with brachysclereids. A centrally placed seed occupies the single locule
entirely; the seeds are deltoid with a basal hilum and acuminate tip while the endosperm is
ruminate. The taxonomic position of the fossils was explored using phylogenetic analyses
of molecular sequences combined with morphological data. Along with the suite of
morphological characters that points to an affinity with the Subtribe Attaleinae, Tribe
Cocoseae, subfamily Arecoideae, the results of the combined phylogenetic analyses
confirm the taxonomic placement. This report constitutes the first confirmed record for
the Subtribe Attaleinae worldwide and the first record of fossil palm fruits from Argentina.
?61.9 Ma) at the Estancia Las Violetas locality, Chubut,
Argentina that show affinities with members of the Subtribe Attaleinae, Tribe Cocoseae,
Subfamily Arecoideae within the Arecaceae. The fossils are preserved as permineralizations,
and were examined by longitudinal, tangential and cross-sections, as well as by the
application of Computed Tomography Scanning technology (CT Scan). The fruits are
ovoid drupes with 3 longitudinal grooves delimiting three valves; displaying apical
stigmatic remains and a single apical germination pore. The exocarp and mesocarp are
fused and anatomically indistinguishable one from another; they contain longitudinal
fibrous bands with brachysclereids. A centrally placed seed occupies the single locule
entirely; the seeds are deltoid with a basal hilum and acuminate tip while the endosperm is
ruminate. The taxonomic position of the fossils was explored using phylogenetic analyses
of molecular sequences combined with morphological data. Along with the suite of
morphological characters that points to an affinity with the Subtribe Attaleinae, Tribe
Cocoseae, subfamily Arecoideae, the results of the combined phylogenetic analyses
confirm the taxonomic placement. This report constitutes the first confirmed record for
the Subtribe Attaleinae worldwide and the first record of fossil palm fruits from Argentina.