A recircumscription of Jacobsenia (Aizoaceae): Re-instating Drosanthemopsis, with two new quartz-endemics from Namaqualand, South Africa and sinking Knersia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F18%3A43914184" target="_blank" >RIV/62156489:43210/18:43914184 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.sajb.2018.02.402" target="_blank" >https://doi.org/10.1016/j.sajb.2018.02.402</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.sajb.2018.02.402" target="_blank" >10.1016/j.sajb.2018.02.402</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A recircumscription of Jacobsenia (Aizoaceae): Re-instating Drosanthemopsis, with two new quartz-endemics from Namaqualand, South Africa and sinking Knersia

Popis výsledku v původním jazyce

The species of Jacobsenia are succulent shrubs which are almost exclusively endemic to patches of quartz-gravel in the arid, winter-rainfall region of South Africa. With data from ten chloroplast markers we show that Jacobsenia is polyphyletic in its current circumscription and that J. vaginata should be excluded from it. We place Jacobsenia vaginata once more in Drosanthemopsis as D. vaginata. Two new species are shown to be closely related to D. vaginata and are also placed in Drosanthemopsis as D. bella Klak sp. nov. and D. kwaganapensis Klak sp. nov. The recently described monotypic Knersia is sister to the three species of Drosanthemopsis and is now included in it. All four species share the unique, antler-like protrusions of the epidermal cells on the leaves. The expanded Drosanthemopsis is found in three of the six phytochoria recognized within the quartz-field flora (QFF) of southern Africa: the Knersvlakte, the Riethuis-Wallekraal and the Southern Richtersveld. Although, D. kwaganapensis and D. vaginata both occur in the Riethuis-Wallekraal phytochorion, the distributions of the four species of Dm.santhemopsis do not overlap. Phylogenetic relationships, the distribution of the species of Drosanthemopsis and the assumed relative ages for the QFF support a northward &quot;trek&quot; of several quartz-endemic taxa in the Aizoaceae, i.e. a diversification from the Knersvlakte northwards into the Richtersveld. We provide a taxonomic treatment for the species of Drosanthemopsis (including Knersia) and Jacob.senia, including their distributions and revised generic descriptions.

Název v anglickém jazyce

A recircumscription of Jacobsenia (Aizoaceae): Re-instating Drosanthemopsis, with two new quartz-endemics from Namaqualand, South Africa and sinking Knersia

Popis výsledku anglicky

The species of Jacobsenia are succulent shrubs which are almost exclusively endemic to patches of quartz-gravel in the arid, winter-rainfall region of South Africa. With data from ten chloroplast markers we show that Jacobsenia is polyphyletic in its current circumscription and that J. vaginata should be excluded from it. We place Jacobsenia vaginata once more in Drosanthemopsis as D. vaginata. Two new species are shown to be closely related to D. vaginata and are also placed in Drosanthemopsis as D. bella Klak sp. nov. and D. kwaganapensis Klak sp. nov. The recently described monotypic Knersia is sister to the three species of Drosanthemopsis and is now included in it. All four species share the unique, antler-like protrusions of the epidermal cells on the leaves. The expanded Drosanthemopsis is found in three of the six phytochoria recognized within the quartz-field flora (QFF) of southern Africa: the Knersvlakte, the Riethuis-Wallekraal and the Southern Richtersveld. Although, D. kwaganapensis and D. vaginata both occur in the Riethuis-Wallekraal phytochorion, the distributions of the four species of Dm.santhemopsis do not overlap. Phylogenetic relationships, the distribution of the species of Drosanthemopsis and the assumed relative ages for the QFF support a northward &quot;trek&quot; of several quartz-endemic taxa in the Aizoaceae, i.e. a diversification from the Knersvlakte northwards into the Richtersveld. We provide a taxonomic treatment for the species of Drosanthemopsis (including Knersia) and Jacob.senia, including their distributions and revised generic descriptions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

South African Journal of Botany

ISSN

0254-6299

e-ISSN

—

Svazek periodika

116

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

15

Strana od-do

67-81

Kód UT WoS článku

000432546500009

EID výsledku v databázi Scopus

2-s2.0-85042910414