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Wang J, Hong X, Jiang C, Li W. First record of the subgenus Hemilepistus (Desertellio) (Isopoda, Agnaridae) from China. Zootaxa 2023; 5389:362-372. [PMID: 38221018 DOI: 10.11646/zootaxa.5389.3.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Indexed: 01/16/2024]
Abstract
The subgenus Hemilepistus (Desertellio) Verhoeff, 1930 is reported from China for the first time. A new species of the subgenus, H. (D.) gracilentus Li & Jiang sp. nov., is described from Xinjiang Uygur Autonomous Region, northwestern China and H. (D.) ruderalis (Pallas, 1771) is redescribed as a new record for Chinese Fauna, and its polymorphism is verified by using the COI sequences. A key to the worldwide species of the subgenus is provided.
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Affiliation(s)
- Jin Wang
- College of Agronomy; Jiangxi Agricultural University; 330045; Nanchang; China.
| | - Xinkai Hong
- College of Agronomy; Jiangxi Agricultural University; 330045; Nanchang; China.
| | - Chao Jiang
- National Resource Center for Chinese Materia Medica; China Academy of Chinese Medical Sciences; 100700; Beijing; China.
| | - Weichun Li
- College of Agronomy; Jiangxi Agricultural University; 330045; Nanchang; China.
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Dimitriou AC, Soares Campos-Filho I, Georgiou A, Taiti S, Sfenthourakis S. Intra-island patterns of cryptic diversity within an oceanic island: Insights from the differentiation of Schizidium Verhoeff, 1901 (Oniscidea, Armadillidiidae) within Cyprus, with descriptions of two new species. Mol Phylogenet Evol 2023; 187:107884. [PMID: 37467903 DOI: 10.1016/j.ympev.2023.107884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 07/11/2023] [Accepted: 07/16/2023] [Indexed: 07/21/2023]
Abstract
Cyprus is a Mediterranean island of volcanic origin isolated for at least 5.3 Myr from surrounding continental areas. The present study focuses on the diversification of the isopod genus Schizidium within the island, including also specimens from surrounding continental areas. The genus Schizidium sensu lato is probably non monophyletic, comprising 26 species distributed from Greece to Iran. Up to date the only representative of the genus reported from Cyprus was Schizidium fissum. Aiming to investigate the patterns of genetic diversity within the focal island, to evaluate the morphology-based taxonomy of the species in the genus, and at the same time to explore phylogenetic relationships with mainland populations, we applied genome-wide ddRADseq as well as Sanger sequencing targeting three mitochondrial (16S, COI and 12S) and the nuclear NaK loci. Results of phylogenetic analyses support the existence of two distinct epigean Schizidium clades with well-defined geographic boundaries that conform to the known paleogeography of Cyprus, plus one endogean clade with restricted distribution within the island. Genetic data and morphology corroborate the assignment of this latter endogean clade to a new species, Schizidium myrrae n. sp. The two epigean clades are also considered as distinct species, one corresponding to the known S. fissum at the eastern part of the island (Pentadaktylos massif) and the other to the newly described S. christosi n. sp. distributed along the western part of the island (Troodos massif). Even though detailed examination of many specimens could not retrieve any morphological differences among representatives of these two clades, clado-chronological analysis indicates a long isolation between them, estimated at ∼ 9 Mya, as well as the sharing of a common ancestor with S. tiberianum from Israel at ∼ 15 Mya. Hence, we can consider these epigean Schizidium species as one more case of cryptic diversity on Cyprus, exhibiting similar patterns with the recently described case in the genus Armadillo.
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Affiliation(s)
- Andreas C Dimitriou
- Department of Biological Sciences, University of Cyprus, Panepistimiou Ave. 1, 2109 Aglantzia, Nicosia, Cyprus.
| | | | - Anastasia Georgiou
- Department of Biological Sciences, University of Cyprus, Panepistimiou Ave. 1, 2109 Aglantzia, Nicosia, Cyprus
| | - Stefano Taiti
- Istituto di Ricerca sugli Ecosistemi Terrestri, Consiglio Nazionale delle Ricerche, Via Madonna del Piano 10, 50019 Sesto Fiorentino (Florence), Italy; Museo di Storia Naturale dell'Università di Firenze, Sezione di Zoologia "La Specola", Via Romana 17, 50125 Florence, Italy
| | - Spyros Sfenthourakis
- Department of Biological Sciences, University of Cyprus, Panepistimiou Ave. 1, 2109 Aglantzia, Nicosia, Cyprus
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Dimitriou AC, Antoniou A, Alexiou I, Poulakakis N, Parmakelis A, Sfenthourakis S. Diversification within an oceanic Mediterranean island: Insights from a terrestrial isopod. Mol Phylogenet Evol 2022; 175:107585. [PMID: 35810970 DOI: 10.1016/j.ympev.2022.107585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/27/2022] [Accepted: 06/06/2022] [Indexed: 11/16/2022]
Abstract
Understanding intra-island patterns of evolutionary divergence, including cases of cryptic diversity, is a crucial step towards deciphering speciation processes. Cyprus is an oceanic island isolated for at least 5.3 Mya from surrounding continental regions, while it remains unclear whether it was ever connected to the mainland, even during the Messinian Salinity Crisis. The terrestrial isopod species Armadillo officinalis, that is widespread across the Mediterranean, offers the opportunity to explore intra-island divergence patterns that might exhibit geographical structure related also to the region's known paleogeography. Genome-wide ddRADseq, as well as Sanger sequencing for four mitochondrial and three nuclear loci data were generated for this purpose. In total, 71 populations from Cyprus, neighbouring continental sites, i.e., Israel, Lebanon and Turkey, and other Mediterranean regions, i.e. Greece, Italy, and Tunisia, were included in the analysis. Phylogenetic reconstructions and population structure analyses support the existence of at least six genetically discrete groups across the study area. Five of these distinct genetic clades occur on Cyprus, four of which are endemic to the island and one is widely distributed along the circum-Mediterranean countries. The sixth clade is distributed in Israel. The closest evolutionary relationship of endemic Cypriot populations is with those from Israel, while the evolutionary clade that is present in countries all around the Mediterranean is very shallow. Cladochronological analyses date the origin of the species on the island at ∼6 Mya. Estimated f4 and D statistics as well as FST values indicate the genetic isolation between the populations sampled from Cyprus and surrounding continental areas, while there is evident gene flow among populations within the island. Species delimitation and population genetic metrics support the existence of three distinct taxonomic units across the study area, two of which occur on the island and correspond to the endemic clade and the widespread circum-Mediterranean one, respectively, while the third corresponds to Israel's clade. The islands' paleogeographic history and recent human activities seem to have shaped current patterns of genetic diversity in this group of species.
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Affiliation(s)
- Andreas C Dimitriou
- Department of Biological Sciences, University of Cyprus, University Campus, 2109 Aglantzia, Nicosia, Cyprus.
| | - Aglaia Antoniou
- Institute of Marine Biology, Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Gournes Pediados, Irakleio, P.O. Box 2214, 71003 Crete, Greece
| | - Ioannis Alexiou
- Department of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Nikos Poulakakis
- Natural History Museum of Crete, School of Sciences and Engineering, University of Crete, Knosos Avenue, Irakleio 71409, Greece; Department of Biology, School of Sciences and Engineering, University of Crete, Vassilika Vouton, Irakleio 70013, Greece
| | - Aristeidis Parmakelis
- Department of Biology, National and Kapodistrian University of Athens, Athens, Greece
| | - Spyros Sfenthourakis
- Department of Biological Sciences, University of Cyprus, University Campus, 2109 Aglantzia, Nicosia, Cyprus
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Dimitriou AC, Sfenthourakis S. An all-inclusive approach: A universal protocol for the successful amplification of four genetic loci of all Onscidea. MethodsX 2022; 9:101762. [PMID: 35782722 PMCID: PMC9241048 DOI: 10.1016/j.mex.2022.101762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 06/13/2022] [Indexed: 11/30/2022] Open
Abstract
Accounting more than 3,700 described species, Oniscidea is the largest and at the same time the only terrestrial isopod suborder inhabiting almost all terrestrial biomes. Despite the great effort dedicated on describing taxonomic diversity of Oniscidea, mainly employing morphology, there is still a considerable number of species/genera of uncertain generic/familiar assignment. Based on different morphological characters, alternative evolutionary relationships have been proposed to describe the diversity of Oniscidea at different phylogenetic levels. Accumulating morphological and genetic data are repeatedly challenging the monophyly of established taxa, undermining the validity of several morphological characters traditionally used in terrestrial isopod taxonomy, leading to often revisions of the current taxonomy of the Oniscidea . The use of genetic data facilitates the efforts to reconstruct the complex evolutionary history of the focal group by providing important data for the identification, delimitation, and description of species. The proposed protocol with universal PCR conditions and primers was used to successfully amplify COI, 16S, 28S and NAK loci in diverse Oniscidea taxa. The application of this protocol is anticipated to facilitate the generation of new genetic data and hence promote scientific research in Isopoda taxonomy, evolution, ecology, and other related fields.
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Recuero E, Rodríguez-Flores PC, García-París M. Homoplasy and morphological stasis revealed through multilocus phylogeny of new myrmecophilous species in Armadillidiidae (Isopoda: Oniscidea). Zool J Linn Soc 2021. [DOI: 10.1093/zoolinnean/zlab066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The terrestrial isopod family Armadillidiidae presents higher diversity in karstic areas, with fewer species present in areas with reduced suitable subterranean habitats, such as siliceous sandy soils. Myrmecophily, although not widespread in the family Armadillidiidae, can help these animals to colonize sandy substrates, as is observed in several populations of myrmecophilous Armadillidiidae species in central and southern Spain. Morphological examination and multilocus phylogenetic analyses, including mitochondrial DNA (Cox1) and nuclear DNA (18S, 28S and H3) markers, indicate that these myrmecophilous populations represent four new taxa: Iberiarmadillidium pinicola gen. & sp. nov., Iberiarmadillidium psammophilum sp. nov., Iberiarmadillidium sakura sp. nov. and Cristarmadillidium myrmecophilum sp. nov. Some of the main diagnostic characters used in the taxonomy of Armadillidiidae are not clearly apomorphic. Among head morphologies, Eluma type seems to be the ancestral state, being typical of several unrelated lineages; duplocarinate and Armadillidium types are derived states observed in unrelated lineages. The presence of a schisma is a convergent character state, because it has been identified in several taxa nested in unrelated clades. The newly described taxa present patterns of morphological stasis and homoplasy, likely to be associated with their shared myrmecophilous habits. The generic taxonomy of the family needs a deep revision including phylogenetic approaches and thorough taxon sampling.
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Affiliation(s)
- Ernesto Recuero
- Museo Nacional de Ciencias Naturales (MNCN-CSIC), c/ José Gutiérrez Abascal 2, 28006 Madrid, Spain
| | - Paula C Rodríguez-Flores
- Museo Nacional de Ciencias Naturales (MNCN-CSIC), c/ José Gutiérrez Abascal 2, 28006 Madrid, Spain
- Centre d’Estudis Avançats de Blanes (CEAB-CSIC), C. d’Accés Cala Sant Francesc 14, 17300 Blanes, Spain
| | - Mario García-París
- Museo Nacional de Ciencias Naturales (MNCN-CSIC), c/ José Gutiérrez Abascal 2, 28006 Madrid, Spain
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Segura-Zarzosa IE, Rodríguez-Almaraz GA, Obregón-Barboza H, Murugan G, Treviño-Flores JA, Maeda-Martínez AM. New records of exotic species of Oniscidea (Crustacea: Isopoda) from northern Mexico. REV MEX BIODIVERS 2020. [DOI: 10.22201/ib.20078706e.2020.91.3098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Dimitriou AC, Taiti S, Sfenthourakis S. Genetic evidence against monophyly of Oniscidea implies a need to revise scenarios for the origin of terrestrial isopods. Sci Rep 2019; 9:18508. [PMID: 31811226 PMCID: PMC6898597 DOI: 10.1038/s41598-019-55071-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 11/21/2019] [Indexed: 11/10/2022] Open
Abstract
Among the few crustacean taxa that managed to inhabit terrestrial environments, Oniscidea includes the most successful colonizers in terms of species richness and abundance. However, neither morphological traits nor molecular markers have definitively resolved phylogenetic relationships among major Oniscidea clades or established the monophyly of the taxon. Herein, we employed the highly conserved, nuclear protein-coding genes Sodium-Potassium Pump (NAK) and Phosphoenolpyruvate Carboxykinase (PEPCK), along with the traditionally used 18 s and 28 s ribosomal RNA genes, in an attempt to clarify these questions. Our dataset included sequences representing all major Oniscidea clades and closely related aquatic taxa, as suggested by previous studies. We applied Bayesian Inference and Maximum Likelihood methods and produced a robust and fully resolved phylogenetic tree that offers strong evidence against the monophyly of Oniscidea. The amphibious genus Ligia appears to be more closely related to representatives of marine suborders, while the phylogenetic pattern of the remaining Oniscidea implies a complex history of the transition from the marine environment to land. With the exception of the basal clade, all other established major clades have been recovered as monophyletic, even though relationships within these clades call for a revised interpretation of morphological characters used in terrestrial isopod taxonomy.
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Affiliation(s)
- Andreas C Dimitriou
- Department of Biological Sciences, University of Cyprus, Panepistimiou Ave. 1, 2109, Aglantzia, Nicosia, Cyprus.
| | - Stefano Taiti
- Museo di Storia Naturale, Sezione di Zoologia "La Specola", Via Romana 17, 50125, Florence, Italy
| | - Spyros Sfenthourakis
- Department of Biological Sciences, University of Cyprus, Panepistimiou Ave. 1, 2109, Aglantzia, Nicosia, Cyprus
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Bedek J, Taiti S, Bilandžija H, Ristori E, Baratti M. Molecular and taxonomic analyses in troglobiotic Alpioniscus (Illyrionethes) species from the Dinaric Karst (Isopoda: Trichoniscidae). Zool J Linn Soc 2019. [DOI: 10.1093/zoolinnean/zlz056] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Species richness of terrestrial isopods is high in caves of the Dinaric Karst, which hosts ~10% of the world’s nominal oniscidean troglobionts. The most widespread taxon is the southern European genus Alpioniscus, which consists of two subgenera: Alpioniscus s.s. and Illyrionethes. Before this study, 14 nominal troglobiotic Illyrionethes taxa were recorded from the Dinaric Karst. Our molecular analyses using two mitochnodrial DNA (16S rRNA and COI) fragments and a nuclear gene (H3) fragment on all known Dinaric taxa identified three distinct lineages: strasseri-, heroldi- and magnus-lineage. Our results confirmed the validity of most nominal species. The exceptions are Alpioniscus balthasari, which consists of two different species including Alpioniscus iapodicus, and Alpioniscus heroldi, which is paraphyletic with respect to Alpioniscus bosniensis. The strasseri-lineage was highly supported by all phylogenetic methods used; therefore, we performed a detailed morphological analysis to distinguish and characterize the species of this group. New morphological characters, such as body part ratios, are proposed for future species identification. In addition, we redescribe three known species (Alpioniscus strasseri, Alpioniscus christiani and Alpioniscus balthasari) and describe two new ones (Alpioniscus hirci sp. nov. and Alpioniscus velebiticus sp. nov.). As a result, 15 nominal species of Illyrionethes are currently known from the Dinaric Karst.
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Affiliation(s)
- Jana Bedek
- Croatian Biospeleological Society, Zagreb, Croatia
| | - Stefano Taiti
- Istituto di Ricerca sugli Ecosistemi Terrestri, CNR, Sesto Fiorentino (Florence), Italy
- Museo di Storia Naturale dell’Università di Firenze, Sezione di Zoologia ‘La Specola’, Florence, Italy
| | - Helena Bilandžija
- Croatian Biospeleological Society, Zagreb, Croatia
- Ruđer Bošković Institute, Zagreb, Croatia
| | - Emma Ristori
- Institute of Biosciences and Bioresources IBBR, CNR, Sesto Fiorentino (Florence), Italy
- Department of Life Sciences, University of Siena, Siena, Italy
| | - Mariella Baratti
- Institute of Biosciences and Bioresources IBBR, CNR, Sesto Fiorentino (Florence), Italy
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