Dating origin orchidaceae


09-Nov-2017 07:53

, the Orchidaceae lack a definitive fossil record and thus many aspects of their evolutionary history remain obscure.Here we report an exquisitely preserved orchid pollinarium (of Meliorchis caribea gen. nov.) attached to the mesoscutellum of an extinct stingless bee, Proplebeia dominicana, recovered from Miocene amber in the Dominican Republic, that is 15–20 million years (Myr) old.It could be something as simple as a run away script or learning how to better use E-utilities, for more efficient work such that your work does not impact the ability of other researchers to also use our site.To restore access and understand how to better interact with our site to avoid this in the future, please have your system administrator contact [email protected] Orchidaceae, known as the orchid family, underwent a spectacularly diverse radiation since its late Cretaceous origin 83-75 million years ago to become one of the two most speciose plant families around today (the other being the Asteraceae), and make up more than one third of monocot species (Ramírez et al. Many morphological and molecular studies break down the family into five monophyletic subfamilies: Apostasioideae, Cypripedioideae, Epidendroideae, Orchidoideae, and Vanilloideae, of which Epidendroideae is by far the largest, containing about 3/5 of orchid species (see references listed at the Orchid Tree, Florida Museum of Natural History: ATOLrefs.htm; Cameron 1999 and references therein; Williams 2013; The Plant List 2010). Taxonomy of the orchid family is difficult and dynamic, because it is so large (now approximately 27,000 accepted species) and many new species are described annually (see references listed at the Orchid Tree, Florida Museum of Natural History: ATOLrefs.htm; Cameron 1999 and references therein; Williams 2013).Regardless, the number of orchid species nearly equals the number of bony fishes and is more than twice the number of bird species, and about four times the number of mammal species.The family also encompasses about 6–11% of all seed plants.

The family also includes Vanilla (the genus of the vanilla plant), Orchis (type genus), and many commonly cultivated plants such as Phalaenopsis and Cattleya.

The temporal origin and diversification of orchids (family Orchidaceae) has been subject to intense debate in the last decade.

The description of the first reliable fossil in 2007 enabled a direct calibration of the orchid phylogeny, but little attention has been paid to the potential influence of dating methodology in obtaining reliable age estimates.

We then perform a new family-level analysis by integrating all 3 available fossils and using BEAST.

To evaluate how the newly estimated ages may influence the evolutionary interpretation of a species-level phylogeny, we assess divergence times for the South American genus Our results provide additional support that all extant orchids shared a most recent common ancestor in the Late Cretaceous (~77 million years ago, Ma).

Orchids have a dizzying array of pollination syndromes, some fantastically complex.



Travelers seek the Artmore for its convenient location in the heart of the Cultural Arts District, moments from Atlanta’s premier shopping, dining and attractions such as the Georgia Aquarium, the High Museum, the Alliance Theater and the Atlanta Symphony Orchestra. … continue reading »


Read more

We make sure we keep our collection up-to-date with new flash games on a regular basis, so remember to check our website every now and then.… continue reading »


Read more

All that is needed is a card reader attached to your PC and the Navionics software available from … continue reading »


Read more

"12345678901" would match the regex w/o those two characters - although it is 11 chars and starts with a 1!… continue reading »


Read more