KARATOPHYLLUM BROMELIOIDES LD GOMEZ REVISITED: A PROBABLE FOSSIL CAM BROMELIAD

被引：7
作者：
Baresch, Andres [1 ]
Smith, J. Andrew C. [2 ]
Winter, Klaus [1 ]
Lucia Valerio, Ana [3 ]
Jaramillo, Carlos [1 ]
机构：
[1] Smithsonian Trop Res Inst, Balboa, Ancon, Panama
[2] Univ Oxford, Dept Plant Sci, Oxford OX1 3RB, England
[3] Museo Nacl Costa Rica, Dept Hist Nat, San Jose, Costa Rica
来源：
AMERICAN JOURNAL OF BOTANY | 2011年 / 98卷 / 11期
基金：
美国国家科学基金会;
关键词：
Aechmea magdalenae; Bromeliaceae; CAM photosynthesis; Karatophyllum bromelioides; leaf morphology; travertine; HISTORICAL BIOGEOGRAPHY; ADAPTIVE RADIATION; AECHMEA-MAGDALENAE; GROWTH; PHOTOSYNTHESIS; PHYLOGENY;
D O I：
10.3732/ajb.1100261
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Premise of the study: The fossil leaf Karatophyllum bromelioides L. D. Gomez found in Costa Rica was proposed by Gomez (1972) to belong to the Bromeliaceae and to date from the middle Tertiary. If the age and affinity of this specimen were proven to be correct, it would constitute the oldest record of this large and ecologically diverse monocotyledonous family. Key results: Morphological features of the fossil (leaf dimensions, marginal spines, cuticular traces) indicate a close affinity with the extant bromeliad Aechmea magdalenae (Andre) Andre ex Baker. Leaf thickness (1.6 mm at maximum) suggests that K. bromelioides L. D. Gomez performed CAM photosynthesis. The geological information does not corroborate the estimated age and location of the specimen; the fossil is suggested to be of more recent origin. Conclusions: The affinity of this fossil to Bromeliaceae was confirmed, but the uncertainties surrounding its age and collection locality mitigate against its use in inferences concerning the evolutionary history of the family.
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页码：1905 / 1908
页数：4
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