Diversity, Evolution, and Systematics of Chelicerates

A special issue of Diversity (ISSN 1424-2818). This special issue belongs to the section "Animal Diversity".

Deadline for manuscript submissions: 31 December 2025 | Viewed by 952

Special Issue Editors


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Guest Editor
Laboratorio de Ecología Molecular y Conservación, El Colegio de la Frontera Sur, Av. Centenario km 5.5, Chetumal C.P. 77014, Quintana Roo, Mexico
Interests: population genetics; genetic diversity; conservation; molecular ecology; genomic
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
El Colegio de la Frontera Sur, Conservación de la Biodiversidad, Avenida Centenario km 5.5, Chetumal 77014, Quintana Roo, Mexico
Interests: biological interactions; arachnology; entomology; zoology; animal behavior; predation; invasive species; biodiversity conservation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues, 

Chelicerates, encompassing sea spiders, horseshoe crabs, and arachnids, constitute a taxonomic group that has long remained in the shadows of scientific inquiry. Despite their prevalence in diverse habitats across marine, terrestrial, and aquatic ecosystems, chelicerates have been comparatively understudied. However, their significance is profound, stemming from their ancient evolutionary lineage, ecological roles, ethology, cognition, medical and social relevance, and intriguing physiological adaptations. Moreover, chelicerates serve as vital biological indicators and warrant attention for conservation initiatives.

In this Special Issue, we try to unite a myriad of scholarly papers spanning various disciplines to illuminate the enigmatic world of chelicerates. We invite contributions covering a wide spectrum of topics, including systematic classifications, genetic and genomic analyses, evolutionary studies, phylogenetic reconstructions, phylogeographic investigations, ecological interactions, conservation strategies, and more. The scope is broad, encompassing diverse research approaches aimed at unraveling the complexities of chelicerate biology.

This Special Issue offers a platform for researchers worldwide to disseminate their findings on chelicerates, fostering collaboration and knowledge exchange. We particularly encourage submissions focusing on tropical and subtropical regions, where chelicerate diversity is abundant yet often overlooked.

Dr. Salima Machkour-M’Rabet
Dr. Yann Hénaut
Guest Editors

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Keywords

  • systematic
  • genetic and genomic
  • evolution
  • interaction
  • predation
  • climate change
  • conservation
  • ecology

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Published Papers (1 paper)

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Research

42 pages, 9784 KiB  
Article
Systematic Revision of the Genus Charmus Karsch, 1879 (Scorpiones: Buthidae), and Assessment of Its Phylogenetic Position Within Buthidae C. L. Koch, 1837 Using Ultraconserved Elements
by Mihir Joshi, Shubhankar Deshpande, Sajiri Ukale, Gaurang Gowande, Julia Bilat, František Kovařík, Hélène Mottaz, František Šťáhlavský, Deshabhushan Bastawade, Lionel Monod and Shauri Sulakhe
Diversity 2025, 17(5), 354; https://doi.org/10.3390/d17050354 - 16 May 2025
Viewed by 286
Abstract
India and Sri Lanka are known to exhibit high levels of biological diversity with many endemic taxa, such as the enigmatic scorpion genus Charmus Karsch, 1879. Members of this genus are rarely encountered in the field and are also known to be morphologically [...] Read more.
India and Sri Lanka are known to exhibit high levels of biological diversity with many endemic taxa, such as the enigmatic scorpion genus Charmus Karsch, 1879. Members of this genus are rarely encountered in the field and are also known to be morphologically very similar, which impedes their systematic assessment. Our dedicated efforts towards sampling the members of the genus resulted in the collection of important material, which allowed us to carry out a thorough systematic revision of the genus using an integrated taxonomic approach. We propose several taxonomic changes based on the results of a detailed morphological study supported by molecular data. Charmus indicus Hirst, 1915 is synonymized with Charmus laneus Karsch, 1879, owing to the lack of morphological differences and low genetic divergence between the two taxa. We designate a neotype for Charmus sinhagadensis Tikader and Bastawade, 1983, and describe a new species from Sirumalai (Tamil Nadu, India). Moreover, we provide the first molecular phylogeny of Charmus based on Cytochrome c Oxidase subunit I (COI), 16S rRNA (16S) and 28S rRNA (28S) genes. The phylogenetic position of the genus within the family Buthidae C. L. Koch, 1837 is also tested using an independent genome-wide dataset (Ultraconserved Elements). Topological congruence and discrepancies between the phylogenies generated with Sanger sequences and the Ultraconserved Elements are commented on, and the reliability of these datasets when evaluating phylogenetic relationships at different hierarchical levels is further discussed. Full article
(This article belongs to the Special Issue Diversity, Evolution, and Systematics of Chelicerates)
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