TY - JOUR
T1 - Primer registro de un estípite de Coryphoideae
T2 - Palmoxylon kikaapoa de la Formación Olmos del Cretácico Superior, Coahuila, México
AU - Sainz-Resendiz, B. Alejandra
AU - Estrada-Ruiz, Emilio
AU - Mateo-Cid, L. Elena
AU - Porras-Múzquiz, Héctor
N1 - Publisher Copyright:
© 2015 Universidad Nacional Autónoma de México, Instituto de Biología.
PY - 2015/12/1
Y1 - 2015/12/1
N2 - In sediments of the Olmos Formation from the Late Cretaceous (upper Campanian) a diverse flora represented by flowers, fruits, leaves and wood of angiosperms, gymnosperms and polypodiales has been collected, these records document the presence of a flora with paratropical affinities. Here we describe a new fossil palm species, Palmoxylon kikaapoa. The permineralized palm trunk is characterized by an atactostele with fibro-vascular bundles simple with reniform shape; with 1-4 vessels of metaxylem with scalariform and oblique perforation plates; 1-5 protoxylem elements with simple perforation plates; paravascular parenchyma developed; phloem in one phloem strad; tabular parenchyma with 2-8 layers of elongated cells; ground tissue consisting of thin-walled cells forming a not compact tissue with intercellular spaces, type A; numerous fibrous bundles in the fundamental tissue; spherical stegmata occur in discontinuous files next to fibro-vascular bundles or fibrous bundles. These anatomical characters allowed us to taxonomically relate the fossil to the family Arecaceae, subfamily Coryphoideae, and tribe Trachycarpeae. Taking into account paleobotanical and botanical evidence, we propose a tropical affinity and an arboreal habit for this fossil species.
AB - In sediments of the Olmos Formation from the Late Cretaceous (upper Campanian) a diverse flora represented by flowers, fruits, leaves and wood of angiosperms, gymnosperms and polypodiales has been collected, these records document the presence of a flora with paratropical affinities. Here we describe a new fossil palm species, Palmoxylon kikaapoa. The permineralized palm trunk is characterized by an atactostele with fibro-vascular bundles simple with reniform shape; with 1-4 vessels of metaxylem with scalariform and oblique perforation plates; 1-5 protoxylem elements with simple perforation plates; paravascular parenchyma developed; phloem in one phloem strad; tabular parenchyma with 2-8 layers of elongated cells; ground tissue consisting of thin-walled cells forming a not compact tissue with intercellular spaces, type A; numerous fibrous bundles in the fundamental tissue; spherical stegmata occur in discontinuous files next to fibro-vascular bundles or fibrous bundles. These anatomical characters allowed us to taxonomically relate the fossil to the family Arecaceae, subfamily Coryphoideae, and tribe Trachycarpeae. Taking into account paleobotanical and botanical evidence, we propose a tropical affinity and an arboreal habit for this fossil species.
KW - Anatomy
KW - Arecaceae
KW - Subfamily Coryphoideae
KW - Trachycarpeae
KW - Upper Campanian
UR - http://www.scopus.com/inward/record.url?scp=84948470949&partnerID=8YFLogxK
U2 - 10.1016/j.rmb.2015.09.009
DO - 10.1016/j.rmb.2015.09.009
M3 - Artículo
AN - SCOPUS:84948470949
SN - 1870-3453
VL - 86
SP - 872
EP - 881
JO - Revista Mexicana de Biodiversidad
JF - Revista Mexicana de Biodiversidad
IS - 4
ER -