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

The western United States is home to numerous narrowly endemic harvestman taxa (  Arachnida  ,   Opiliones  ), including members of the genus    Sitalcina    Banks, 1911.    Sitalcina    is comprised of three species groups, including the monospecific    S.   californica    and    S.   lobata    groups, and the    S.   sura    group with eight described species. All species in the    S.   sura    group have very small geographic distributions, with group members distributed like disjunct “beads on a string” from Monterey south to southern California and southeast to the sky-island mountain ranges of southern Arizona. Here, molecular phylogenetic and species delimitation analyses were conducted for all described species in the    S.   sura    group, plus several newly discovered populations. Species trees were reconstructed using multispecies coalescent methods implemented in *BEAST, and species delimitation was accomplished using Bayes Factor Delimitation ( BFD ). Based on quantitative species delimitation results supported by consideration of morphological characters, two new species (   Sitalcina   oasiensis    sp. n. ,    Sitalcina   ubicki    sp. n. ) are described. We also provide a description of the previously unknown male of    S.   borregoensis    Briggs, 1968. Molecular phylogenetic evidence strongly supports distinctive desert versus coastal clades, with desert canyon taxa from southern California more closely related to Arizona taxa than to geographically proximate California coastal taxa. We hypothesize that southern ancestry and plate tectonics have played a role in the diversification history of this animal lineage, similar to sclerophyllous plant taxa of the Madro-Tertiary Geoflora. Molecular clock analyses for the    S.   sura    group are generally consistent with these hypotheses. We also propose that additional    Sitalcina    species await discovery in the desert canyons of southern California and northern Baja, and the mountains of northwestern mainland Mexico.

zookeys

New species in the    Sitalcina   sura    species group (  Opiliones  ,   Laniatores  ,   Phalangodidae  ), with evidence for a biogeographic link between California desert canyons and Arizona sky islands