@article {598, title = {Phylogeny, biogeography and evolution of Triglochin L. (Juncaginaceae) {\textendash} Morphological diversification is linked to habitat shifts rather than to genetic diversification}, journal = {Molecular Phylogenetics and Evolution}, volume = {83}, year = {2015}, pages = {200{\textendash}212}, abstract = {

A species-level phylogeny is presented for Triglochin, the largest genus of Juncaginaceae (Alismatales) comprising about 30 species of annual and perennial herbs. Triglochin has an almost cosmopolitan distribution with Australia as centre of species diversity. Trans-Atlantic and trans-African disjunctions exist in the genus. Phylogenetic analyses were conducted based on molecular data obtained from nuclear (ITS, internal transcribed spacer) and chloroplast sequence data (psbA-trnH spacer, matK gene). Based on the phylogeny of the group divergence times were estimated and ancestral distribution areas reconstructed. Our data confirm the monophyly of Triglochin and resolve relationships between the major lineages of the genus. The sister group relationship between the Mediterranean/African T. bulbosa complex and the American T. scilloides (formerly Lilaea s.) is strongly supported. This clade is sister to the rest of the genus which contains two main clades. In the first, the widespread T. striata is sister to a clade comprising annual Triglochin species from Australia. The second clade comprises T. palustris as sister to the T. maritima complex, of which the latter is further divided into a Eurasian and an American subclade. Taxonomic diversity in some clades appears to be linked to habitat shifts and is not present in old but ecologically invariable lineages such as the non-monophyletic T. maritima. Diversification in Triglochin began in the Miocene or Oligocene, and most disjunctions in Triglochin were dated to the Miocene.

}, doi = {10.1016/j.ympev.2014.10.014}, author = {von Mering, Sabine and Kadereit, Joachim W.} } @article {588, title = {Morphology of Maundia supports its isolated phylogenetic position in the early-divergent monocot order Alismatales}, journal = {Botanical Journal of the Linnean Society}, volume = {173}, year = {2013}, pages = {12{\textendash}45}, abstract = {

According to recent molecular phylogenetic data, the rare Australian endemic Maundia triglochinoides does not form a clade with taxa traditionally classified as members of Juncaginaceae. Therefore, views on the morphological evolution and taxonomy of Alismatales require re-assessment. As the morphology of Maundia is poorly known and some key features have been controversially described in the literature, the flowers, fruits, inflorescence axes and peduncles were studied using light and scanning electron microscopy. Inflorescences are bractless spikes with flowers arranged in trimerous whorls. Except in the inflorescence tip (where the flower groundplan is variable), flowers possess two tepals in transversal-abaxial positions, six stamens in two trimerous whorls and four carpels in median and transversal positions. Fruits are indehiscent. The shared possession of orthotropous ovules supports the molecular phylogenetic placement of Maundia as sister to a large clade including Potamogetonaceae and related families. Maundia and Aponogeton spp. share the same highly unusual floral groundplan, a homoplastic similarity that can be explained by spatial constraints in developing inflorescences. The nucellar coenocyte of Maundia appears to be unique among monocots. As Maundia exhibits a mosaic of features characteristic of other families of tepaloid core Alismatales, its segregation as a separate family is plausible.

}, keywords = {anatomy, Aponogetonaceae, bract, flower, fruit, Juncaginaceae, Maundiaceae, nucellus, ovule, Potamogetonaceae, tepal, vasculature}, doi = {10.1111/boj.12068}, author = {Sokoloff, Dmitry D. and von Mering, Sabine and Jacobs, Surrey W.L. and Remizowa, Margarita} } @article {587, title = {Tetroncium and its only species, T. magellanicum (Juncaginaceae): distribution, ecology and lectotypification}, journal = {Willdenowia - Annals of the Botanic Garden and Botanical Museum Berlin-Dahlem}, volume = {43}, year = {2013}, pages = {13-24}, abstract = {

Tetroncium magellanicum (Juncaginaceae) was described by Willdenow in 1808, based on material collected by Commerson at the Strait of Magellan during Bougainville\&$\#$39;s voyage around the world. Type material of this species was traced and a lectotype for the name is designated. A description of the species and notes on its ecology and conservation status are provided. For the first time, a detailed map showing the known distribution area of T. magellanicum is presented.

}, keywords = {Gough Island, Herbarium Willdenow, lectotype, peatlands, southern South America, typification}, doi = {doi:10.3372/wi.43.43102}, url = {http://www.ingentaconnect.com/content/bgbm/will/2013/00000043/00000001/art00002}, author = {von Mering, Sabine} } @inbook {3, title = {Phylogeny, systematics, and recircumscription of Juncaginaceae - a cosmopolitan wetland family}, booktitle = {Diversity, Phylogeny, and Evolution in the Monocotyledons - Proceedings of the Fourth International Conference on the Comparative Biology of the Monocotyledons and the Fifth International Symposium on Grass Systematics and Evolution}, year = {2010}, pages = {55-79}, publisher = {Aarhus University Press}, organization = {Aarhus University Press}, address = {Aarhus}, abstract = {

Juncaginaceae are a small monocot family of mostly coastal and wetland herbs of almost cosmopolitan distribution. A phylogenetic analysis of the family and members of Alismatales was conducted to clarify the circumscription of Juncaginaceae and to understand intrafamilial relationships. For the first time, all genera associated with the family in the past were analysed together. Two plastid (rbcL and matK) and one mitochondrial gene (atpA) were sequenced. The separate and combined analysis of the three markers showed that Juncaginaceae are not monophyletic in their current circumscription. The family is re-circumscribed to exclude Maundia which is proposed to belong to a separate family Maundiaceae. In the new classification Juncaginaceae comprise three genera: Tetroncium, Cycnogeton, and Triglochin. Tetroncium is weakly supported as sister to the rest of the family. The reinstated Cycnogeton (formerly included in Triglochin) is highly supported as sister to Triglochin s.s. The enigmatic Lilaea is nested within Triglochin s.s. and highly supported as sister to the T. bulbosa complex. The results of the molecular analysis are discussed in combination with morphological characters. A key to the genera of the family is presented, and six new combinations are proposed: Cycnogeton alcockiae, Cycnogeton dubium, Cycnogeton microtuberosum, Cycnogeton multifructum, Cycnogeton rheophilum, and Triglochin scilloides.

}, keywords = {Alismatales, Cycnogeton, Lilaea, Maundia, Tetroncium, Triglochin}, author = {von Mering, Sabine and Kadereit, Joachim W} } @article {2, title = {Revision of the Mediterranean and Southern African Triglochin bulbosa complex (Juncaginaceae)}, journal = {Edinburgh Journal of Botany}, volume = {67}, year = {2010}, pages = {353-398}, chapter = {353}, abstract = {

The Triglochin bulbosa complex (Juncaginaceae) from the Mediterranean region and Africa is revised. One new species, Triglochin buchenaui K\öcke, Mering \& Kadereit, and two new subspecies, Triglochin bulbosa subsp. calcicola Mering, K\öcke \& Kadereit and Triglochin bulbosa subsp. quarcicola Mering, K\öcke \& Kadereit, are described from South Africa. The only two Mediterranean taxa in the complex (Triglochin barrelieri, T. laxiflora) are elevated to species rank. Altogether seven species and four subspecies are recognised: Triglochin barrelieri, T. buchenaui, T. bulbosa subsp. bulbosa, T. bulbosa subsp. calcicola, T. bulbosa subsp. quarcicola, T. bulbosa subsp. tenuifolia, T. compacta, T. elongata, T. laxiflora and T. milnei. An identification key, detailed descriptions and accounts of the ecology and distribution of the taxa are provided. An IUCN conservation status is proposed for each taxon.

}, keywords = {Cape Floristic Region, Cape Peninsula, ecology, IUCN conservation assessment, Juncaginaceae, Mediterranean Floristic Region, morphology, revision, South Africa, taxonomy, Triglochin, typification}, doi = {10.1017/S0960428610000041}, url = {http://journals.cambridge.org/abstract_S0960428610000041}, author = {K{\"o}cke, A Valerie and von Mering, Sabine and Mucina, Ladislav and Kadereit, Joachim W} }