Hidden diversity in plain sight: four new species of Nemesia (Araneae: Mygalomorphae) from the Córdoba Province of Spain

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  Hidden diversity in plain sight: four new species of Nemesia (Araneae: Mygalomorphae) from the Córdoba Province of Spain Abstract A taxonomic revision of the species of Nemesia Audouin, 1826, distributed in the vicinity of Córdoba City, southern Spain, is presented. Four new species are described: Nemesia morana sp. nov. (female), N. kodama sp. nov. (male and female), N. rosae sp. nov. (male and female), and N. tamajoni sp. nov. (male and female). These species are distinguished by distinct morphological characters, including the shape of the spermathecae, palpal bulbs, and spinnerets, as well as by burrow architecture. Fieldwork was conducted across two of the three major habitat types in the region—the humid, forested mountains of Sierra Morena and the croplands and riparian forests of the Guadalquivir Valley—while the third, the “campiña”, which is mainly composed of agricultural landscapes, remains poorly explored. Sampling methods included pitfall trapping and the direct e...

Systematics of the Aliatypus erebus Group (Mygalomorphae, F. Antrodiaetidae): Exploring a Possible Ring of Species Around the California Central Valley (Full Text Dissertation or Thesis)

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Systematics of the Aliatypus erebus Group (Mygalomorphae, F. Antrodiaetidae): Exploring a Possible Ring of Species Around the California Central Valley (Full Text Dissertation or Thesis)

The Aliatypus erebus group represents a monophyletic radiation of trapdoor spiders with a ring-like distribution around California's Central Valley, shaped by long-term geological events and exhibiting substantial cryptic diversity and geographic structuring.

Additional topics discussed include:
  • Phylogenomic methods using ultra conserved elements (UCE)
  • Impact of tectonic activity and fault systems on species diversification
  • Cryptic speciation and species delimitation in low-dispersal arthropods


Hays, T. G. (2026). Systematics of the aliatypus erebus group (mygalomorphae, F. antrodiaetidae): Exploring a possible ring of species around the california central valley (Order No. 32582807). Available from ProQuest Dissertations & Theses Global. (3330504647). https://www.proquest.com/dissertations-theses/systematics-em-aliatypus-erebus-group/docview/3330504647/se-2