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Citation for Study 17555

Citation title: "Delongia gen. nov., a new genus of Polytrichaceae with two disjunct species in East Africa and the Himalaya".

Study name: "Delongia gen. nov., a new genus of Polytrichaceae with two disjunct species in East Africa and the Himalaya".

This study is part of submission 17555 (Status: Published).

Citation

Bell N.E., Kariyawasam I., Hedderson T., & Hyvonen J.T. 2015. Delongia gen. nov., a new genus of Polytrichaceae with two disjunct species in East Africa and the Himalaya. TAXON, .

Authors

Bell N.E. (submitter)
Kariyawasam I.
Hedderson T.
Hyvonen J.T. +358-50-5171184

Abstract

Although the family Polytrichaceae contains the largest and most structurally complex of all mosses, a number of distantly related lineages share a relatively reduced gametophytic morphology and have historically been conflated under polyphyletic genera, most notably Oligotrichum s.l. Based on new and newly identified collections, phylogenetic analysis of nucleotide data, scanning electron microscopy and relaxed-clock divergence time estimation, we recognise O. glaciale and O. cavallii under the new genus Delongia, which is more closely related to Psilopilum, Atrichum and Steereobryon than to Oligotrichum. The two species are mutually highly distinct in both morphological and molecular characters, with D. glacialis occurring across the Himalaya from Pakistan to Yunnan and D. cavallii found in the East African Rift Mountains and on the island of R?union. Divergence time estimation suggests that the lineages represented by the extant species diverged from each other around the Oligocene-Miocene boundary (~23 mya), contemporaneous with the origins of the East African Rift system and ongoing uplift of the Qinghai-Tibetan Plateau, while Delongia most likely shares a common ancestor in the Eocene (56-34 mya) either with the arctic?subarctic genus Psilopilum or with Atrichum and Steereobryon.

Keywords

Bryophyte phylogeny, East African Rift, mosses, Oligotrichum, relaxed-clock dating, R?union

External links

About this resource

Canonical resource URI: http://purl.org/phylo/treebase/phylows/study/TB2:S17555
Other versions: Nexus NeXML

Show BibTeX reference

		@ARTICLE{TreeBASE2Ref24546,
	 author = {Neil Elliot Bell and Isuru  Kariyawasam and Terry A. J.  Hedderson and Jaakko Tapani Hyvonen},
	 title = {Delongia gen. nov., a new genus of Polytrichaceae with two disjunct species in East Africa and the Himalaya},
	 year = {2015},
	 keywords = {Bryophyte phylogeny, East African Rift, mosses, Oligotrichum, relaxed-clock dating, R?union},
	 doi = {},
	 url = {http://},
	 pmid = {},
	 journal = {TAXON},
	 volume = {},
	 number = {},
	 pages = {},
	 abstract = {Although the family Polytrichaceae contains the largest and most structurally complex of all mosses, a number of distantly related lineages share a relatively reduced gametophytic morphology and have historically been conflated under polyphyletic genera, most notably Oligotrichum s.l. Based on new and newly identified collections, phylogenetic analysis of nucleotide data, scanning electron microscopy and relaxed-clock divergence time estimation, we recognise O. glaciale and O. cavallii under the new genus Delongia, which is more closely related to Psilopilum, Atrichum and Steereobryon than to Oligotrichum. The two species are mutually highly distinct in both morphological and molecular characters, with D. glacialis occurring across the Himalaya from Pakistan to Yunnan and D. cavallii found in the East African Rift Mountains and on the island of R?union. Divergence time estimation suggests that the lineages represented by the extant species diverged from each other around the Oligocene-Miocene boundary (~23 mya), contemporaneous with the origins of the East African Rift system and ongoing uplift of the Qinghai-Tibetan Plateau, while Delongia most likely shares a common ancestor in the Eocene (56-34 mya) either with the arctic?subarctic genus Psilopilum or with Atrichum and Steereobryon.}
}

Show RIS reference

TY - JOUR
ID - 24546
AU - Bell,Neil Elliot
AU - Kariyawasam,Isuru
AU - Hedderson,Terry A. J.
AU - Hyvonen,Jaakko Tapani
T1 - Delongia gen. nov., a new genus of Polytrichaceae with two disjunct species in East Africa and the Himalaya
PY - 2015
KW - Bryophyte phylogeny
KW - East African Rift
KW - mosses
KW - Oligotrichum
KW - relaxed-clock dating
KW - R?union
UR - http://dx.doi.org/
N2 - Although the family Polytrichaceae contains the largest and most structurally complex of all mosses, a number of distantly related lineages share a relatively reduced gametophytic morphology and have historically been conflated under polyphyletic genera, most notably Oligotrichum s.l. Based on new and newly identified collections, phylogenetic analysis of nucleotide data, scanning electron microscopy and relaxed-clock divergence time estimation, we recognise O. glaciale and O. cavallii under the new genus Delongia, which is more closely related to Psilopilum, Atrichum and Steereobryon than to Oligotrichum. The two species are mutually highly distinct in both morphological and molecular characters, with D. glacialis occurring across the Himalaya from Pakistan to Yunnan and D. cavallii found in the East African Rift Mountains and on the island of R?union. Divergence time estimation suggests that the lineages represented by the extant species diverged from each other around the Oligocene-Miocene boundary (~23 mya), contemporaneous with the origins of the East African Rift system and ongoing uplift of the Qinghai-Tibetan Plateau, while Delongia most likely shares a common ancestor in the Eocene (56-34 mya) either with the arctic?subarctic genus Psilopilum or with Atrichum and Steereobryon.
L3 -
JF - TAXON
VL -
IS -
ER -