Fossil Woods from the El Cien Formation in Baja California Sur: Leguminosae

IAWA Journal ◽  
1994 ◽  
Vol 15 (3) ◽  
pp. 229-245 ◽  
Author(s):  
Sergio R. S. Cevallos-Ferriz ◽  
Josefina Barajas-Morales
Keyword(s):  
Systematic Study ◽  
Wood Anatomy ◽  
Baja California ◽  
Early Miocene ◽  
Fossil Flora ◽  
South American ◽  
Baja California Sur ◽  
Late Oligocene ◽  
Extant Taxon ◽  
History Of

Three types of fossil woods with similarities to the Leguminosae are described, Mimosoxylon tenax (Felix) Müller-Stoll ' Mädel, Bajacalijomioxylon cienense Cevallos-Ferriz ' Barajas-Morales, gen. et sp. nov., and Copaijeroxylon matanzensis Cevallos-Ferriz ' Barajas-Morales, sp. nov. These woods are from the EI Cien Formation in Baja California Sur, Mexico, which is dated as Zemorrian-Saucesian, i.e., late Oligocene–early Miocene. Although two of the names of the fossil woods suggest affinity with a particular extant taxon, differences in some quantitative and qualitative features preclude their identification with a single extant taxon. The similarity among wood of some groups of extant Leguminosae and limited knowledge of character variability in woods of this family explains this taxonomie uncertainty. These fossil woods from Baja California underscore the need for an extensive systematic study of the wood anatomy of Leguminosae, add to the poorly known plant history of the Peninsula, suggest a tropical South American influence in the fossil flora of Baja Califomia, and indicate that the climate during the Zemorrian- Saucesian was different from the xeric conditions that prevail today in the area.

scholarly journals La familia Bromeliaceae en México

2018 ◽  
Vol 96 (3) ◽  
pp. 533 ◽  
Author(s):  
Adolfo Espejo-Serna ◽  
Ana Rosa López-Ferrari
Keyword(s):  
Species Richness ◽  
Literature Review ◽  
Systematic Study ◽  
Baja California ◽  
Sustainable Use ◽  
Species Number ◽  
Baja California Sur ◽  
Number Of Species ◽  
Botanical Collection

<p><strong>Background</strong>: Bromeliaceae family in Mexico has been the object of interest by botanists since 1789; their systematic study was approached from the 1970s onwards, and now there are significant advances in its taxonomic-floristic knowledge.<strong></strong></p><p><strong>Question: </strong>How many and which species of Bromeliaceae occur in Mexico? How they are distributed, and how many are endemic?</p><p><strong>Study site</strong>: México, 1887-2017.</p><p><strong>Methods</strong>: Based on the study of the Mexican Bromeliaceae, including botanical collection, literature review, and revision, analysis and determination of specimens in 50 herbaria, data about species richness, Mexican endemics, and distribution of their taxa in the country, were obtained.</p><p><strong>Results</strong>: In Mexico are represented four of the eight subfamilies of Bromeliaceae, 19 genera, 422 species, and 8 infraespecific taxa. The genera with the highest number of species in the country are <em>Tillandsia </em>(230/54.5 %), <em>Hechtia</em> (71/16.8 %) and Pitcairnia (50/11.8 %). 318 of the Bromeliaceae species are endemics to Mexico, as well as <em>Ursulaea</em> and <em>Viridantha</em> genera<em>; </em>172 species are microendemic. The entity with the highest number of taxa is Oaxaca, followed by Chiapas, Veracruz and Guerrero. Tlaxcala and Baja California Sur have the lowest species number. Baja California, Baja California Sur, Campeche, Ciudad de México, San Luis Potosí, Sonora, Tabasco y Tlaxcala have not strict endemic taxa.</p><p><strong>Conclusion</strong>: Although progress in the knowledge of Mexican Bromeliaceae has been constant, exploration and recollection work is still required before concluding the Mexican bromeliad flora. It is also necessary to promote studies considering aspects of conservation and sustainable use.</p>

NEW SPECIES OF TAPIRIRA (ANACARDIACEAE) FROM EARLY MIOCENE SEDIMENTS OF THE EL CIEN FORMATION, BAJA CALIFORNIA SUR, MEXICO

IAWA Journal ◽  
2004 ◽  
Vol 25 (1) ◽  
pp. 103-117 ◽  
Author(s):  
Hugo I. Martínez-Cabrera ◽  
Sergio R.S. Cevallos-Ferriz
Keyword(s):  
New Species ◽  
Baja California ◽  
Principal Component ◽  
Early Miocene ◽  
Vessel Element ◽  
Baja California Sur ◽  
Low Latitude ◽  
Diagnostic Features ◽  
Fossil Species ◽  
Extant Species

From the early Miocene El Cien Formation, Baja California Sur, Mexico, a new Tapirira species is described. Among the diagnostic features that relate T. peninsularis Martínez-Cabrera & Cevallos-Ferriz sp. nov. with extant species of the genus are libriform septate fibers, radial canals with 2–4 layers of epithelial cells, and scanty paratracheal to vasicentric axial parenchyma. In order to establish similarity between wood of T. peninsularis and fossil and extant species of the genus, cluster and principal component analyses were carried out. Numerical analyses support that Tapirira peninsularis is distinct from other extant and fossil species of the genus. Quantitative characters like frequency of radial canals, diameter of fibres, vessel element lumen, and height and width of the rays with radial canals are important in distinguishing between these taxa. Though these wood characters are quantitative, they also have been useful in the recognition of two subgenera within the genus. Recognition of this new species, along with the fossil record of the group, and a phytogeographic analysis suggest a low latitude North American origin for the genus, and a subsequent introduction to southern latitudes.

scholarly journals Fossil woods from early Miocene sediments of the El Cien Formation, Baja California Sur, Mexico

2006 ◽  
Vol 138 (3-4) ◽  
pp. 141-163 ◽  
Author(s):  
Hugo. I. Martínez-Cabrera ◽  
Sergio R.S. Cevallos-Ferriz ◽  
Imogen Poole
Keyword(s):  
Baja California ◽  
Early Miocene ◽  
Baja California Sur

scholarly journals Historia natural de la anidación de ammophila aberti haldeman (hymenoptera: sphecidae) en Baja California Sur. México

2008 ◽  
Vol 24 (2) ◽  
Author(s):  
María Luisa Jiménez-Jiménez ◽  
Carlos Palacios-Cardiel
Keyword(s):  
North America ◽  
Natural History ◽  
Baja California ◽  
Arid Zone ◽  
First Record ◽  
Baja California Sur ◽  
History Of ◽  
Historia Natural

Natural history of nesting of the wasp Ammophila aberti Haldeman during autumn 2006-2007 in Baja California Sur, Mexico is described. While this wasp has been found in Mexico, this is the first record of thisbehavior in the subtropical, arid zone of North America. A comparison with nesting observations in other places was made. Two species of ants are predators of these wasp larvae.

scholarly journals Late Quaternary faulting history of the Carrizal and related faults, La Paz region, Baja California Sur, Mexico

Geosphere ◽  
2014 ◽  
Vol 10 (3) ◽  
pp. 476-504 ◽  
Author(s):  
Paul J. Umhoefer ◽  
Sara J. Maloney ◽  
Beverly Buchanan ◽  
J Ramón Arrowsmith ◽  
Genaro Martinez-Gutiérrez ◽  
...  
Keyword(s):  
Baja California ◽  
Late Quaternary ◽  
Baja California Sur ◽  
La Paz ◽  
History Of

Early Miocene shortening in the lower Comondú Group in Baja California Sur (México)

2017 ◽  
Vol 719-720 ◽  
pp. 135-147 ◽  
Author(s):  
Marco Bonini ◽  
Mariano Cerca ◽  
Giovanna Moratti ◽  
Margarita López-Martínez ◽  
Giacomo Corti ◽  
...  
Keyword(s):  
Baja California ◽  
Early Miocene ◽  
Baja California Sur
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