Abstract
In the present study we used morphological data and DNA barcodes to describe a new species, Hydrodroma angelieri sp. nov. from Corsica, France. A high genetic distance of 17.3±0.017% K2P from its molecularly most closely related European congener, H. despiciens (Müller, 1776), supports H. angelieri sp. nov. as a distinct species. Morphologically the new species can be identified on the basis of relatively small leg claws, the presence of only one swimming seta on II-L-5 and 4-6 swimming setae on the anterior surface of IV-L-5. An updated key for the European species of Hydrodroma is provided.
Highlights
Important characters in hydrodromids include i) idiosoma integument completely soft, lacking muscle attachment sclerites, ii) the uppermost layer of the integument is characterized by dense papillosity, with papillae that differ in shape and which are species specific, iii) genital flaps bearing numerous small acetabula arranged in several rows along the medial edge; iv) legs rather uniform with interspecific differences in the absolute and relative size of claws, and in number and arrangement of long, fine swimming setae; v) morphology of mouth-parts, with P-4 bearing a long and pointed dorsodistal extension reaching the tip of the slender and elongated P-5 (Gerecke 2017)
Więcek et al (2020) applied an integrative approach based on the DNA barcode of the mitochondrial cytochrome c oxidase subunit I (COI) gene sequence and morphology to delineate the status of some Hydrodroma species from North America and Europe
The final alignment for species delimitation using COI sequence data included 11 Hydrodroma specimens listed in Table 2 and one outgroup, Panisopsis thori (Walter, 1907) (BOLD DCBDJ086-21, Voucher code CCDB 38392 H02) from Germany to root the tree
Summary
31 species of the family Hydrodromidae are known worldwide (Zhi-Qiang et al 2011; Pešić et al 2021a, b), five of which are present in Europe, i.e. Hydrodroma despiciens (Müller, 1776), Hydrodroma pilosa Besseling, 1940, H. torrenticola (Walter, 1908), H. reinhardi Pešić, 2002, and H. cf rheophila Cook, 1967. (2022), Hydrodroma angelieri (Acari, Hydrachnidia: Hydrodromidae) a new water mite species from Corsica based on morphological and DNA barcode evidence. Więcek et al (2020) applied an integrative approach based on the DNA barcode of the mitochondrial cytochrome c oxidase subunit I (COI) gene sequence and morphology to delineate the status of some Hydrodroma species from North America and Europe.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
