English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Based on phylogenetic and morphological evidence,    Tridimeris   chiapensis    Escobar-Castellanos &amp; Ortiz-Rodr.,  sp .  n.  (  Annonaceae  ), a new species from the karst forest of southern Mexico, is described and illustrated. The new species differs from    Tridimeris   hahniana   , the only described species in the genus, in that the latter has flowers with sepals densely tomentose outside, one (rarely two) carpel(s) per flower and fruits densely covered with golden-brown hairs, while    Tridimeris   chiapensis    has flowers with glabrous sepals outside, two to five carpels per flower and glabrous fruits. Furthermore, a shallow triangular white patch at the base of the inner petals is found in    T.   chiapensis   , a morphological character shared with the sister genus    Sapranthus    but absent in    T.   hahniana   . Geographically, both species occur allopatrically. With just one known locality and seven individuals of    Tridimeris   chiapensis    recorded in one sampling hectare, and based on application of the criteria established by the IUCN, we conclude tentatively that the species is critically endangered.

Phylogenetic analyses and morphological characteristics support the description of a second species of Tridimeris ( Annonaceae )