Stenomesseae was a
tribe
The term tribe is used in many different contexts to refer to a category of human social group. The predominant worldwide usage of the term in English language, English is in the discipline of anthropology. This definition is contested, in p ...
(in the family
Amaryllidaceae
The Amaryllidaceae are a family of herbaceous, mainly perennial and bulbous (rarely rhizomatous) flowering plants in the monocot order Asparagales. The family takes its name from the genus ''Amaryllis'' and is commonly known as the amaryllis fa ...
, subfamily
Amaryllidoideae
Amaryllidoideae (Amaryllidaceae ''s.s.'', amaryllids) is a subfamily of monocot flowering plants in the family Amaryllidaceae, order Asparagales. The most recent APG classification, APG III, takes a broad view of the Amaryllidaceae, which then ...
), where it forms part of the Andean
clade
A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, ...
, one of two American clades. The tribe was originally described by
Traub in his monograph on the Amaryllidaceae in 1963, as Stenomessae based on the type genus ''
Stenomesson''. In 1995 it was recognised that Eustephieae was a distinct group separate from the other Stenomesseae. Subsequently, the Müller-Doblies' (1996) divided tribe Eustephieae into two subtribes, Stenomessinae and Eustephiinae.
The advent of
molecular phylogenetics
Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to ...
showed that the Stemomesseae (including Stenomesson) was
polyphyletic
A polyphyletic group is an assemblage of organisms or other evolving elements that is of mixed evolutionary origin. The term is often applied to groups that share similar features known as homoplasies, which are explained as a result of converg ...
. Consequently, a separate tribe (Clinantheae) was created from one group and the remainder, which
segregated with
Eucharideae
''Eucharideae'' is a tribe of plants within the family Amaryllidaceae. It was augmented in 2000 by Meerow ''et al.'' following a molecular phylogenetic study that revealed that many elements of the tribe Stenomesseae segregated with it, rathe ...
was treated as another tribe. Initially it was suggested that this combined tribe be referred to as a newly circumscribed Stenomesseae, but subsequently the term Eucharideae has been conserved.
Taxonomy
Phylogeny
The placement of Stenomesseae, now Eucharideae within subfamily Amaryllidoideae is shown in the following cladogram.
References
Bibliography
* , in
*
* , in .
(additional excerpts)*
*
*
*
*
*
*
*
* , in
*
*
External links
{{Taxonbar, from=Q10678879
Amaryllidoideae
Asparagales tribes
Historically recognized angiosperm taxa