@article {20406, title = {High diversity of Lauraceae from the Oligocene of Ningming, South China}, journal = {Palaeoworld}, volume = {23}, year = {2014}, month = {09/2014}, pages = {336-356}, chapter = {336}, abstract = {

Lauraceae is among the largest and floristically most important woody plant families in subtropical and tropical zones. However, the Cenozoic fossil records of Lauraceae are mostly from mid-latitude regions. Here we described eight lauraceous species from the Oligocene of Ningming, Guangxi, South China on the basis of leaf compressions with cuticular structure, providing new evidence for high diversity of Lauraceae in the low latitude region of the northern hemisphere during the late Paleogene. The extant genera to which the Ningming Oligocene fossils are possibly closely related include Cinnamomum, Neolitsea, Litsea, Alseodaphne, Laurus, and Beilschmiedia. All of these extant genera except Laurus still exist in Guangxi today, whereas Laurus is currently distributed in the Mediterranean and adjacent regions. A cladistic analysis based on leaf architectural and leaf cuticular characters for Paleogene Lauraceae species in the world indicated a possible relationship between European and East Asian Paleogene species.

}, keywords = {Biogeography, Cladistic analysis, cuticle, High diversity, Lauraceae, Oligocene}, doi = {10.1016/j.palwor.2014.08.001}, author = {Shi, Gong-Le and Xie, Zhi-Ming and Li, Hao-Min} } @article {20369, title = {Epidermal features allowing identification of evolutionary lineages in the Ocotea complex (Lauraceae)}, journal = {Perspectives in Plant Ecology, Evolution and Systematics}, volume = {31}, year = {2018}, month = {01/2018}, pages = {17-35}, chapter = {17}, abstract = {

Epidermal characters are widely used in identification of fossil plant material, yet they are insufficiently known in many extant taxa. Here, we examined the cuticle and stomatal complex in 85 species of the Ocotea complex by optical and scanning electron microscopy. We defined 19 types of stomatal surface appearance, which were mostly consistent with genera or species groups recognized based on reproductive characteristics. The epidermal features support the conclusion derived from DNA analyses that Ocotea is heterogeneous in its current circumscription. We suggest an evolution of the subsidiary cells in the Ocotea complex species from asymmetric to symmetric, and from relatively wide to narrower shapes of the stomatal complex.

}, keywords = {cuticle, evolution, stomata}, doi = {https://doi.org/10.1016/j.ppees.2017.12.003}, author = {Trofimov, Dimitrij and Rohwer, Jens G.} } @article {20366, title = {Cuticular features of Cryptocarya (Lauraceae) from Peninsular Malaysia, Thailand and Indo-China and its taxonomic implications}, journal = {Phytotaxa}, volume = {244}, year = {2016}, month = {01/2016}, pages = {26-44}, chapter = {26}, abstract = {

Cuticular features potentially offer valuable information on phytotaxonomy, especially for plants that are difficult to classify or identify. Cryptocarya is one such difficult and poorly known genus, and we investigated its cuticular features to evaluate their taxonomic implications. We examined cutinized leaf epidermis and the stomatal complex for 21 species from Peninsular Malaysia, Thailand and Indo-China, as well as one species endemic to Borneo and one to Sumatra, and compared features among members of this group, between this group and congeners in the other countries, and between this group and the other genera of Lauraceae. Many of the Cryptocarya species studied have straight to slightly curved anticlinal epidermal walls and butterfly-shaped stomatal ledges, although some variation was seen in the ornamentation of the periclinal epidermal walls and the appearance of the stomatal complex. Based on these results, we recognized four groups and two subgroups among the South-east Asian species. Comparison with congeneric taxa in the other countries indicates that butterfly-shaped stomatal ledges are often shared among the species across the regions. However, no cuticular features occur exclusively in any of the species groups of Cryptocarya studied here, nor in the genus as a whole. We consider that cuticular features are useful in the recognition of infrageneric groups within Lauraceae, bearing in mind that they might have evolved in parallel in different genera.

}, keywords = {cuticle, epidermis, Morphology}, doi = {http://dx.doi.org/10.11646/phytotaxa.244.1.2}, author = {Sachiko Nishida and Rogier P.J. de Kok and Yang, Yong} } @article {18719, title = {Leaf anatomy of Beilschmiedia (Lauraceae) in the neotropics}, journal = {Nature and Human Activities}, volume = {4}, year = {1999}, pages = {9-43}, keywords = {Beilschmiedia, cuticle, leaf anatomy, vascular bundle, venation}, author = {Sachiko Nishida and Christophel, David C.} }