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Gastineau R, Lemieux C, Turmel M, Otis C, Boyle B, Coulis M, Gouraud C, Boag B, Murchie AK, Winsor L, Justine JL. The invasive land flatworm Arthurdendyus triangulatus has repeated sequences in the mitogenome, extra-long cox2 gene and paralogous nuclear rRNA clusters. Sci Rep 2024; 14:7840. [PMID: 38570596 PMCID: PMC10991399 DOI: 10.1038/s41598-024-58600-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 04/01/2024] [Indexed: 04/05/2024] Open
Abstract
Using a combination of short- and long-reads sequencing, we were able to sequence the complete mitochondrial genome of the invasive 'New Zealand flatworm' Arthurdendyus triangulatus (Geoplanidae, Rhynchodeminae, Caenoplanini) and its two complete paralogous nuclear rRNA gene clusters. The mitogenome has a total length of 20,309 bp and contains repetitions that includes two types of tandem-repeats that could not be solved by short-reads sequencing. We also sequenced for the first time the mitogenomes of four species of Caenoplana (Caenoplanini). A maximum likelihood phylogeny associated A. triangulatus with the other Caenoplanini but Parakontikia ventrolineata and Australopacifica atrata were rejected from the Caenoplanini and associated instead with the Rhynchodemini, with Platydemus manokwari. It was found that the mitogenomes of all species of the subfamily Rhynchodeminae share several unusual structural features, including a very long cox2 gene. This is the first time that the complete paralogous rRNA clusters, which differ in length, sequence and seemingly number of copies, were obtained for a Geoplanidae.
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Affiliation(s)
- Romain Gastineau
- Institute of Marine and Environmental Sciences, University of Szczecin, Szczecin, Poland.
| | - Claude Lemieux
- Département de Biochimie, de Microbiologie et de Bio-Informatique, Institut de Biologie Intégrative et des Systèmes, Université Laval, Quebec, QC, Canada
| | - Monique Turmel
- Département de Biochimie, de Microbiologie et de Bio-Informatique, Institut de Biologie Intégrative et des Systèmes, Université Laval, Quebec, QC, Canada
| | - Christian Otis
- Plateforme d'Analyse Génomique, Institut de Biologie Intégrative et des Systèmes, Université Laval, Quebec, QC, Canada
| | - Brian Boyle
- Plateforme d'Analyse Génomique, Institut de Biologie Intégrative et des Systèmes, Université Laval, Quebec, QC, Canada
| | - Mathieu Coulis
- CIRAD, UPR GECO, 97285, Le Lamentin, Martinique, France
- GECO, CIRAD, University Montpellier, Montpellier, France
| | - Clément Gouraud
- UMR CNRS 6553 Ecobio, Université de Rennes, 263 Avenue du Gal Leclerc, CS 74205, CEDEX, 35042, Rennes, France
| | - Brian Boag
- The James Hutton Institute, Invergowrie, DD2 5DA, Scotland
| | - Archie K Murchie
- Sustainable Agri-Food Sciences Division, Agri-Food and Biosciences Institute, Belfast, BT9 5PX, Northern Ireland
| | - Leigh Winsor
- College of Science and Engineering, James Cook University of North Queensland, Townsville, QLD, Australia
| | - Jean-Lou Justine
- ISYEB, Institut de Systématique, Évolution, Biodiversité (UMR7205 CNRS, EPHE, MNHN, UPMC, Université des Antilles), Muséum National d'Histoire Naturelle, CP 51, 55 Rue Buffon, 75231, Paris Cedex 05, France
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Soo OYM, Gastineau R, Verdon G, Winsor L, Justine JL. Rediscovery of Bipalium admarginatum de Beauchamp, 1933 (Platyhelminthes, Tricladida, Geoplanidae) in Malaysia, with molecular characterisation including the mitogenome. Zootaxa 2023; 5277:585-599. [PMID: 37518300 DOI: 10.11646/zootaxa.5277.3.11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Indexed: 08/01/2023]
Abstract
We present here the first observation of Bipalium admarginatum de Beauchamp, 1933 since its original description 90 years ago. Three specimens were found on Perhentian Kecil Island, off Terengganu State, Malaysia and photographed in the field, and two were collected. This report thus includes the first colour photographs published for this species, from a locality close to the type-locality, Tioman Island (which is ca. 200 km south of the locality in this study, on the east coast of Peninsula Malaysia). We describe the external morphology and colour pattern of the species, which correspond well to the original description, itself based only on two preserved specimens. We performed an in-depth molecular characterisation of the species, including its complete mitochondrial genome, the 18S sequence and elongation 1-alpha (EF1-α) sequence. In addition, EF1-α sequences were also retrieved for 5 additional geoplanid species. No tRNA-Thr could be detected in the mitogenome of B. admarginatum, a lack already reported in several species of geoplanids, but we found a 13 bp sequence that contains the anticodon loop and seems to be conserved among geoplanids and might thus possibly represent a non-canonical undetected tRNA. We discuss the difficulties encountered in trying to reconstruct the cluster of nuclear ribosomal genes, a problem already mentioned for other Triclads. Three phylogenies, based respectively on all mitochondrial proteins, 18S, and EF1-α, were computed; the position of B. admarginatum within the Bipaliinae was confirmed in each tree, as sister-group to various bipaliine species according to the sequences available for each tree. In the mitochondrial proteins tree, which had high support, B. admarginatum was sister to Bipalium kewense and Diversibipalium multilineatum.
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Affiliation(s)
| | - Romain Gastineau
- Institute of Marine and Environmental Sciences; University of Szczecin; Szczecin; Poland.
| | | | - Leigh Winsor
- James Cook University; Townsville; Queensland; Australia..
| | - Jean-Lou Justine
- ISYEB; Institut de Systématique; Évolution; Biodiversité (UMR7205 CNRS; EPHE; MNHN; UPMC; Université des Antilles); Muséum National d'Histoire Naturelle; CP 51; 55 rue Buffon; 75231 Paris Cedex 05; France.
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Almeida AL, Álvarez-Presas M, Carbayo F. The discovery of new Chilean taxa revolutionizes the systematics of Geoplaninae Neotropical land planarians (Platyhelminthes: Tricladida). Zool J Linn Soc 2022. [DOI: 10.1093/zoolinnean/zlac072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Abstract
Two subfamilies of land planarians (Geoplanidae) are endemic to the Neotropical region, namely Geoplaninae (with 29 genera and 346 nominal species, most of which are from Brazil) and its sister-group Timyminae, with only two Chilean species. The systematics of these groups through morphology and molecular data (COI and 28S rDNA genes), including nine new Chilean species, is re-assessed in this study. The great morphological diversity of the Chilean species is congruent with the molecular trees and, accordingly, five new genera (Adinoplana, Harana, Myoplana, Sarcoplana and Transandiplana) are proposed, each characterized by putative synapomorphies. Seven new tribes are also erected (Adinoplanini, Gusanini, Haranini, Inakayaliini, Myoplanini, Polycladini and Sarcoplanini), each one monogeneric, except Geoplanini (which includes all genera under the current concept of Geoplaninae plus the Chilean Transandiplana) and Sarcoplanini (with Sarcoplana and the already known Mapuplana, Pichidamas and Wallamapuplana). Re-diagnoses of Geoplaninae, Timymini, Gusana, Inakayalia, Polycladus and Pichidamas are proposed and biogeographic remarks on Transandiplana are provided
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Affiliation(s)
- Ana Laura Almeida
- Museu de Zoologia da Universidade de São Paulo , Avenida Nazaré, 481, CEP 04263-000, Ipiranga, São Paulo, SP , Brazil
| | - Marta Álvarez-Presas
- School of Biological Sciences, University of Bristol , 24 Tyndall Avenue, BS8 1TQ, Bristol , UK
| | - Fernando Carbayo
- Museu de Zoologia da Universidade de São Paulo , Avenida Nazaré, 481, CEP 04263-000, Ipiranga, São Paulo, SP , Brazil
- Laboratório de Ecologia e Evolução, Escola de Artes, Ciências e Humanidades, Universidade de São Paulo – USP , Av. Arlindo Bettio, 1000, CEP 03828-000, São Paulo, SP , Brazil
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Gastineau R, Winsor L, Justine JL. The complete mitogenome of the potentially invasive flatworm Australopacificaatrata (Platyhelminthes, Geoplanidae) displays unusual features common to other Rhynchodeminae. Zookeys 2022; 1110:121-133. [PMID: 36761455 PMCID: PMC9848750 DOI: 10.3897/zookeys.1110.83228] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 05/24/2022] [Indexed: 11/12/2022] Open
Abstract
We sequenced the complete mitochondrial genome of the flatworm Australopacificaatrata. The species, originally described from New South Wales, Australia, has been found in various locations in the British Isles, New Zealand and in the United States of America; it is thus potentially invasive. The genome is 16513 bp long, encodes for 12 protein coding genes, two ribosomal RNA genes and 20 tRNA genes, and is completely colinear with the other two available Rhynchodeminae. In addition, it shares with them some unusual characters discriminating them from members of the other subfamilies of Geoplanidae, the most noticeable being the extra length of its cox2 gene. The data allow a reliable multigene phylogeny to be derived, and also provide a means of accurate biomonitoring of possible invasiveness by A.atrata.
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Affiliation(s)
- Romain Gastineau
- Institute of Marine and Environmental Sciences, University of Szczecin, Szczecin, PolandUniversity of SzczecinSzczecinPoland
| | - Leigh Winsor
- College of Science and Engineering, James Cook University, Townsville, Queensland, AustraliaJames Cook UniversityCondonAustralia
| | - Jean-Lou Justine
- ISYEB, Institut de Systématique, Évolution, Biodiversité (UMR7205 CNRS, EPHE, MNHN, UPMC, Université des Antilles), Muséum National d’Histoire Naturelle, CP 51, 55 rue Buffon, 75231 Paris Cedex 05, FranceUniversité des AntillesParisFrance
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Justine JL, Gastineau R, Gros P, Gey D, Ruzzier E, Charles L, Winsor L. Hammerhead flatworms (Platyhelminthes, Geoplanidae, Bipaliinae): mitochondrial genomes and description of two new species from France, Italy, and Mayotte. PeerJ 2022; 10:e12725. [PMID: 35178290 PMCID: PMC8815365 DOI: 10.7717/peerj.12725] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 12/10/2021] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND New records of alien land planarians are regularly reported worldwide, and some correspond to undescribed species of unknown geographic origin. The description of new species of land planarians (Geoplanidae) should classically be based on both external morphology and histology of anatomical structures, especially the copulatory organs, ideally with the addition of molecular data. METHODS Here, we describe the morphology and reproductive anatomy of a species previously reported as Diversibipalium "black", and the morphology of a species previously reported as Diversibipalium "blue". Based on next generation sequencing, we obtained the complete mitogenome of five species of Bipaliinae, including these two species. RESULTS The new species Humbertium covidum n. sp. (syn: Diversibipalium "black" of Justine et al., 2018) is formally described on the basis of morphology, histology and mitogenome, and is assigned to Humbertium on the basis of its reproductive anatomy. The type-locality is Casier, Italy, and other localities are in the Department of Pyrénées-Atlantiques, France; some published or unpublished records suggest that this species might also be present in Russia, China, and Japan. The mitogenomic polymorphism of two geographically distinct specimens (Italy vs France) is described; the cox1 gene displayed 2.25% difference. The new species Diversibipalium mayottensis n. sp. (syn: Diversibipalium "blue" of Justine et al., 2018) is formally described on the basis of external morphology and complete mitogenome and is assigned to Diversibipalium on the basis of an absence of information on its reproductive anatomy. The type- and only known locality is the island of Mayotte in the Mozambique Channel off Africa. Phylogenies of bipaliine geoplanids were constructed on the basis of SSU, LSU, mitochondrial proteins and concatenated sequences of cox1, SSU and LSU. In all four phylogenies, D. mayottensis was the sister-group to all the other bipaliines. With the exception of D. multilineatum which could not be circularised, the complete mitogenomes of B. kewense, B. vagum, B. adventitium, H. covidum and D. mayottensis were colinear. The 16S gene in all bipaliine species was problematic because usual tools were unable to locate its exact position. CONCLUSION Next generation sequencing, which can provide complete mitochondrial genomes as well as traditionally used genes such as SSU, LSU and cox1, is a powerful tool for delineating and describing species of Bipaliinae when the reproductive structure cannot be studied, which is sometimes the case of asexually reproducing invasive species. The unexpected position of the new species D. mayottensis as sister-group to all other Bipaliinae in all phylogenetic analyses suggests that the species could belong to a new genus, yet to be described.
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Affiliation(s)
- Jean-Lou Justine
- ISYEB-Institut de Systématique, Évolution, Biodiversité, Muséum National d’Histoire Naturelle, Paris, France
| | - Romain Gastineau
- Institute of Marine and Environmental Sciences, University of Szczecin, Szczecin, Poland
| | - Pierre Gros
- Amateur Naturalist, Unaffiliated, Cagnes-sur-Mer, France
| | - Delphine Gey
- Molécules de Communication et Adaptation des Micro-Organismes, Muséum National d’Histoire Naturelle, Paris, France
| | - Enrico Ruzzier
- Department of Agronomy, Food, Natural Resources, Animals and the Environment (DAFNAE), Padova, Italy
| | | | - Leigh Winsor
- James Cook University, Townsville, Queensland, Australia
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