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Dettner K, Kovács Z, Rewicz T, Csabai Z. Age-dependent variation of aedeagal morphology in Agabusuliginosus and the status of A.lotti (Coleoptera, Dytiscidae). Zookeys 2024; 1212:153-177. [PMID: 39318675 PMCID: PMC11420541 DOI: 10.3897/zookeys.1212.130039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Accepted: 07/22/2024] [Indexed: 09/26/2024] Open
Abstract
A doubt has arisen about the taxonomic status of Agabuslotti within the Agabusuliginosus species group due to morphological similarities and lack of molecular data. In this study, a comprehensive morphological and molecular analysis of specimens from Central Europe was conducted, focusing on the Hungarian population. Morphological comparisons of genital structures revealed age-dependent variations, suggesting a gradual transition from A.lotti to A.uliginosus. Molecular analysis of COI sequences further supported this hypothesis, showing minimal genetic differences among most specimens, with only one individual exhibiting distinctiveness. Therefore, A.lotti syn. nov. must be regarded as a junior synonym of A.uliginosus. Our findings also highlight the need for additional multi-marker studies covering a broader geographic range and including both molecular and morphological approaches to elucidate the taxonomic and phylogenetic relationships within this species group. The inclusion of Hungarian samples notably enriched the diversity of haplotypes, emphasizing the importance of expanding sampling efforts in future research.
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Affiliation(s)
- Konrad Dettner
- Universität Bayreuth, Chair of Evolutionary Animal Ecology, D-95440 Bayreuth, Hohereuth 17b, D-95448 Bayreuth, GermanyUniversität BayreuthBayreuthGermany
| | - Zsolt Kovács
- University of Pécs, Department of Hydrobiology, Ifjúság útja 6, H-7624 Pécs, HungaryUniversity of PécsPécsHungary
| | - Tomasz Rewicz
- University of Lodz, Department of Invertebrate Zoology and Hydrobiology, Banacha 12/16, 90-237 Łódź, PolandUniversity of LodzŁódźPoland
| | - Zoltán Csabai
- University of Pécs, Department of Hydrobiology, Ifjúság útja 6, H-7624 Pécs, HungaryUniversity of PécsPécsHungary
- HUN-REN Balaton Limnological Research Institute, Klebelsberg Kuno 3, H-8237, Tihany, HungaryHUN-REN Balaton Limnological Research InstituteTihanyHungary
- HUN-REN Centre for Ecological Research, Institute of Aquatic Ecology, Bem square 18/C, H-4026, Debrecen, HungaryHUN-REN Centre for Ecological Research, Institute of Aquatic EcologyDebrecenHungary
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Santos-Perdomo I, Suárez D, Moraza ML, Arribas P, Andújar C. Towards a Canary Islands barcode database for soil biodiversity: revealing cryptic and unrecorded mite species diversity within insular soils. Biodivers Data J 2024; 12:e113301. [PMID: 38314123 PMCID: PMC10838043 DOI: 10.3897/bdj.12.e113301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 12/23/2023] [Indexed: 02/06/2024] Open
Abstract
Soil arthropod diversity contributes to a high proportion of the total biodiversity on Earth. However, most soil arthropods are still undescribed, hindering our understanding of soil functioning and global biodiversity estimations. Inventorying soil arthropods using conventional taxonomical approaches is particularly difficult and costly due to the great species richness, abundance and local-scale heterogeneity of mesofauna communities and the poor taxonomic background knowledge of most lineages. To alleviate this situation, we have designed and implemented a molecular barcoding framework adapted to soil fauna. This pipeline includes different steps, starting with a morphology-based selection of specimens which are imaged. Then, DNA is extracted non-destructively. Both images and voucher specimens are used to assign a taxonomic identification, based on morphology that is further checked for consistency with molecular information. Using this procedure, we studied 239 specimens of mites from the Canary Islands including representatives of Mesostigmata, Sarcoptiformes and Trombidiformes, of which we recovered barcode sequences for 168 specimens that were morphologically identified to 49 species, with nine specimens that could only be identified at the genus or family levels. Multiple species delimitation analyses were run to compare molecular delimitations with morphological identifications, including ASAP, mlPTP, BINs and 3% and 8% genetic distance thresholds. Additionally, a species-level search was carried out at the Biodiversity Databank of the Canary Islands (BIOTA) to evaluate the number of species in our dataset that were not previously recorded in the archipelago. In parallel, a sequence-level search of our sequences was performed against BOLD Systems. Our results reveal that multiple morphologically identified species correspond to different molecular lineages, which points to significant levels of unknown cryptic diversity within the archipelago. In addition, we evidenced that multiple species in our dataset constituted new records for the Canary Islands fauna and that the information for these lineages within online genetic repositories is very incomplete. Our study represents the first systematic effort to catalogue the soil arthropod mesofauna of the Canary Islands and establishes the basis for the Canary Islands Soil Biodiversity barcode database. This resource will constitute a step forward in the knowledge of these arthropods in a region of special interest.
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Affiliation(s)
- Irene Santos-Perdomo
- Island Ecology and Evolution Research Group, Institute of Natural Products and Agrobiology (IPNA-CSIC), 38206, La Laguna, Spain Island Ecology and Evolution Research Group, Institute of Natural Products and Agrobiology (IPNA-CSIC), 38206 La Laguna Spain
- School of Doctoral and Postgraduate Studies, University of La Laguna, 38206, La Laguna, Spain School of Doctoral and Postgraduate Studies, University of La Laguna, 38206 La Laguna Spain
| | - Daniel Suárez
- Island Ecology and Evolution Research Group, Institute of Natural Products and Agrobiology (IPNA-CSIC), 38206, La Laguna, Spain Island Ecology and Evolution Research Group, Institute of Natural Products and Agrobiology (IPNA-CSIC), 38206 La Laguna Spain
- School of Doctoral and Postgraduate Studies, University of La Laguna, 38206, La Laguna, Spain School of Doctoral and Postgraduate Studies, University of La Laguna, 38206 La Laguna Spain
| | - María L Moraza
- Universidad de Navarra, Instituto de Biodiversidad y Medioambiente BIOMA, Irunlarrea 1, 31008, Pamplona, Spain Universidad de Navarra, Instituto de Biodiversidad y Medioambiente BIOMA, Irunlarrea 1, 31008 Pamplona Spain
| | - Paula Arribas
- Island Ecology and Evolution Research Group, Institute of Natural Products and Agrobiology (IPNA-CSIC), 38206, La Laguna, Spain Island Ecology and Evolution Research Group, Institute of Natural Products and Agrobiology (IPNA-CSIC), 38206 La Laguna Spain
| | - Carmelo Andújar
- Island Ecology and Evolution Research Group, Institute of Natural Products and Agrobiology (IPNA-CSIC), 38206, La Laguna, Spain Island Ecology and Evolution Research Group, Institute of Natural Products and Agrobiology (IPNA-CSIC), 38206 La Laguna Spain
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Marin I, Palatov D, Copilaș-Ciocianu D. The remarkable Ponto-Caspian amphipod diversity of the lower Durso River (SW Caucasus) with the description of Litorogammarus dursi gen. et sp. nov. Zootaxa 2023; 5297:483-517. [PMID: 37518782 DOI: 10.11646/zootaxa.5297.4.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Indexed: 08/01/2023]
Abstract
The first insight into the unexpectedly diverse amphipod assemblage of the Durso River (Novorossiysk area) in the SW mountainous pre-Caucasian area is presented. The presence of six species is revealed, including three new records for the area and one species new to science. The phylogenetic relationships of all studied species and their relatives were examined based on the divergence of the COI mtDNA gene marker (barcoding). The conducted research clearly showed that the coastal part of the Black Sea and the adjacent pre-Caucasian river/land areas harbors a significant undescribed diversity, and that the transitional sea/river brackish biotopes are important reservoirs of the endemicity. A new genus, Litorogammarus gen. nov. is proposed for native pebble-dwelling species, namely Echinogammarus karadagiensis Grintsov, 2009, Echinogammarus mazestiensis Marin & Palatov, 2021 and the newly discovered Litorogammarus dursi sp. nov., from the lower (estuarine) part of the Durso River and adjacent coastal areas. These three species form a strongly supported molecular clade and share a number of characters such as smooth body without carinae and setae, antenna II armed with dense curled setae, lacking calceoli, pereopods III-VII with sparse, short setation, epimeral plates armed with spines only, telson lobes longer than broad, gradually tapering, bearing only spines. Pectenogammarus oliviiformis (Greze, 1985) comb. nov. is also discovered in the area and is re-described herein. Although this is probably one of the most abundant and common coastal pebble-dwelling species along the northeastern coasts of the Black Sea, it was previously poorly described and thus overlooked by researchers.
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Affiliation(s)
- Ivan Marin
- A. N. Severtsov Institute of Ecology and Evolution of RAS; 119071; Moscow; Russia.
| | - Dmitry Palatov
- A. N. Severtsov Institute of Ecology and Evolution of RAS; 119071; Moscow; Russia.
| | - Denis Copilaș-Ciocianu
- Laboratory of Evolutionary Ecology of Hydrobionts; Nature Research Centre; Vilnius; Lithuania.
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Hupało K, Copilaș-Ciocianu D, Leese F, Weiss M. Morphology, nuclear SNPs and mate selection reveal that COI barcoding overestimates species diversity in a Mediterranean freshwater amphipod by an order of magnitude. Cladistics 2023; 39:129-143. [PMID: 36576962 DOI: 10.1111/cla.12520] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 11/25/2022] [Accepted: 11/28/2022] [Indexed: 12/29/2022] Open
Abstract
DNA sequence information has revealed many morphologically cryptic species worldwide. For animals, DNA-based assessments of species diversity usually rely on the mitochondrial cytochrome c oxidase subunit I (COI) gene. However, a growing amount of evidence indicate that mitochondrial markers alone can lead to misleading species diversity estimates due to mito-nuclear discordance. Therefore, reports of putative species based solely on mitochondrial DNA should be verified by other methods, especially in cases where COI sequences are identical for different morphospecies or where divergence within the same morphospecies is high. Freshwater amphipods are particularly interesting in this context because numerous putative cryptic species have been reported. Here, we investigated the species status of the numerous mitochondrial molecular operational taxonomic units (MOTUs) found within Echinogammarus sicilianus. We used an integrative approach combining DNA barcoding with mate selection observations, detailed morphometrics and genome-wide double digest restriction site-associated DNA sequencing (ddRAD-seq). Within a relatively small sampling area, we detected twelve COI MOTUs (divergence = 1.8-20.3%), co-occurring in syntopy at two-thirds of the investigated sites. We found that pair formation was random and there was extensive nuclear gene flow among the ten MOTUs co-occurring within the same river stretch. The four most common MOTUs were also indistinguishable with respect to functional morphology. Therefore, the evidence best fits the hypothesis of a single, yet genetically diverse, species within the main river system. The only two MOTUs sampled outside the focal area were genetically distinct at the nuclear level and may represent distinct species. Our study reveals that COI-based species delimitation can significantly overestimate species diversity, highlighting the importance of integrative taxonomy for species validation, especially in hyperdiverse complexes with syntopically occurring mitochondrial MOTUs.
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Affiliation(s)
- Kamil Hupało
- Aquatic Ecosystem Research, Faculty of Biology, University of Duisburg-Essen, Universitätsstr. 5, Essen, 45141, Germany
| | - Denis Copilaș-Ciocianu
- Nature Research Centre, Laboratory of Evolutionary Ecology of Hydrobionts, Akademijos 2, Vilnius, 08412, Lithuania
| | - Florian Leese
- Aquatic Ecosystem Research, Faculty of Biology, University of Duisburg-Essen, Universitätsstr. 5, Essen, 45141, Germany.,Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Universitätsstr. 2, Essen, 45141, Germany
| | - Martina Weiss
- Aquatic Ecosystem Research, Faculty of Biology, University of Duisburg-Essen, Universitätsstr. 5, Essen, 45141, Germany.,Centre for Water and Environmental Research (ZWU), University of Duisburg-Essen, Universitätsstr. 2, Essen, 45141, Germany
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Morhun H, Son MO, Rewicz T, Kazanavičiūtė E, Copilas-Ciocianu D. The first records of Niphargus hrabei and N. potamophilus in Ukraine and Bulgaria significantly enlarge the ranges of these species. THE EUROPEAN ZOOLOGICAL JOURNAL 2022. [DOI: 10.1080/24750263.2022.2126534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- H. Morhun
- Department of Water Quality, Institute of Marine Biology of National Academy of Sciences of Ukraine, Odesa, Ukraine
- Department of Invertebrate Zoology and Hydrobiology, University of Lodz, Łódź, Poland
| | - M. O. Son
- Department of Water Quality, Institute of Marine Biology of National Academy of Sciences of Ukraine, Odesa, Ukraine
| | - T. Rewicz
- Department of Invertebrate Zoology and Hydrobiology, University of Lodz, Łódź, Poland
| | - E. Kazanavičiūtė
- Laboratory of Evolutionary Ecology of Hydrobionts, Nature Research Centre, Vilnius, Lithuania
- Lancaster Environment Centre, Lancaster University, Lancaster, UK
| | - D. Copilas-Ciocianu
- Laboratory of Evolutionary Ecology of Hydrobionts, Nature Research Centre, Vilnius, Lithuania
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Drozdova P, Saranchina A, Madyarova E, Gurkov A, Timofeyev M. Experimental Crossing Confirms Reproductive Isolation between Cryptic Species within Eulimnogammarus verrucosus (Crustacea: Amphipoda) from Lake Baikal. Int J Mol Sci 2022; 23:ijms231810858. [PMID: 36142769 PMCID: PMC9506054 DOI: 10.3390/ijms231810858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 08/26/2022] [Accepted: 09/13/2022] [Indexed: 11/16/2022] Open
Abstract
Ancient lakes are known speciation hotspots. One of the most speciose groups in the ancient Lake Baikal are gammaroid amphipods (Crustacea: Amphipoda: Gammaroidea). There are over 350 morphological species and subspecies of amphipods in Baikal, but the extent of cryptic variation is still unclear. One of the most common species in the littoral zone of the lake, Eulimnogammarus verrucosus (Gerstfeldt, 1858), was recently found to comprise at least three (pseudo)cryptic species based on molecular data. Here, we further explored these species by analyzing their mitogenome-based phylogeny, genome sizes with flow cytometry, and their reproductive compatibility. We found divergent times of millions of years and different genome sizes in the three species (6.1, 6.9 and 8 pg), further confirming their genetic separation. Experimental crossing of the western and southern species, which are morphologically indistinguishable and have adjacent ranges, showed their separation with a post-zygotic reproductive barrier, as hybrid embryos stopped developing roughly at the onset of gastrulation. Thus, the previously applied barcoding approach effectively indicated the separate biological species within E. verrucosus. These results provide new data for investigating genome evolution and highlight the need for precise tracking of the sample origin in any studies in this morphospecies.
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Affiliation(s)
- Polina Drozdova
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia
- Baikal Research Centre, 664011 Irkutsk, Russia
- Correspondence: (P.D.); (M.T.)
| | | | | | - Anton Gurkov
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia
- Baikal Research Centre, 664011 Irkutsk, Russia
| | - Maxim Timofeyev
- Institute of Biology, Irkutsk State University, 664025 Irkutsk, Russia
- Baikal Research Centre, 664011 Irkutsk, Russia
- Correspondence: (P.D.); (M.T.)
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Marin IN, Palatov DM. Dursogammarus dromaderus gen. et sp. nov., a new Ponto-Caspian gammarid (Amphipoda: Gammaridae) from the coastal pebble habitats of the foothills of the Caucasus. ZOOLOGY IN THE MIDDLE EAST 2022. [DOI: 10.1080/09397140.2022.2116171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Ivan N. Marin
- A. N. Severtsov Institute of Ecology and Evolution of RAS, Moscow
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