Jean-Lou Justine

Jean-Lou Justine
Muséum National d'Histoire Naturelle · Origines et Évolution

PhD, DrSc

About

537
Publications
176,202
Reads
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7,994
Citations
Citations since 2017
82 Research Items
2584 Citations
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Introduction
My research (since 1978…): - Parasite biodiversity of Coral Reefs, including most groups of fish parasites. - Systematics and phylogeny of Monogenea, including molecular phylogeny. - Spermatozoa of Platyhelminthes (mainly Cestoda, Digenea and Monogenea) as characters for phylogeny. - Spermatozoa of Nematodes. - Invasive land planarians (Geoplanidae), in France and French overseas territories.
Additional affiliations
October 2012 - present
Parasite
Position
  • Editor
Description
  • Editor-in-Chief of open-access journal Parasite http://www.parasite-journal.org/
January 2012 - present
Muséum National d'Histoire Naturelle
Position
  • Curation of Collections
Description
  • Curator of Parasitic Worms
January 2003 - December 2010
Institute of Research for Development
Position
  • Biodiversity of fish parasites
Education
September 1980 - September 1985
Université de Montpellier
Field of study
  • Parasitology
September 1978 - July 1980
Université de Montpellier
Field of study
  • Parasitology

Publications

Publications (537)
Article
Full-text available
Background Species of the genera Bipalium and Diversibipalium , or bipaliines, are giants among land planarians (family Geoplanidae), reaching length of 1 m; they are also easily distinguished from other land flatworms by the characteristic hammer shape of their head. Bipaliines, which have their origin in warm parts of Asia, are invasive species,...
Chapter
The wide biodiversity and economic importance of digeneans have motivated a great deal of research in the last decade, focussing on their phylogenetic positions. Molecular research was instrumental for our understanding of phylogeny in the Digenea, but spermatological studies have also provided many results, which are potentially useful for phyloge...
Article
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Diplectanid monogeneans are gill parasites that can infect fish in huge numbers and thus become harmful, especially in maricultured fish. It is therefore useful to have taxonomic tools, such as keys, to identify species. The following diplectanid species from groupers of the Mediterranean Sea were studied: five species of Pseudorhabdosynochus Yamag...
Article
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The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009;...
Article
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Recent cladistic phylogenies of the Platyhelminthes, especially the parasitic species, use for synapomorphies several characters of the spermatozoa, together with other characters. This paper reinvestigates synapomorphies based on sperm characteristics. The outgroup usually chosen for such studies on the parasitic Platyhelminthes (Cercomeria) is th...
Article
The metabarcoding of digestive contents is a powerful approach to study the diet of newly introduced predatory species, and therefore to forecast their potential impact on native species. Obama nungara (Platyhelminthes: Geoplanidae) is an exotic terrestrial flatworm, which recently invaded several Western European countries and predates on earthwor...
Article
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A popular piece about the diet of the invasive land flatworm Obama nungara in gardens in France. In French. Mainly based on our research published in: https://doi.org/10.1016/j.ejsobi.2022.103449
Article
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We sequenced the complete mitochondrial genome of the flatworm Australopacifica atrata. The species, originally described from New South Wales, Australia, has been found in various locations in the Brit-ish 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 co...
Article
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The land flatworm Obama nungara, a species originating from South America and already invasive in many European countries, is recorded from La Réunion, a French island in the Indian Ocean. This is the first record of O. nungara from this locality and also the first record of the species for Africa. Three specimens were collected in 2021 and 2022, i...
Article
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Specimens of Hexostoma thynni (Delaroche, 1811) Rafinesque, 1815 were collected from their type-host, the bluefin tuna Thunnus thynnus , caught off Algeria, i.e. close to the type-locality, off Mallorca, which is also in the Mediterranean. The species is briefly redescribed and compared to previous descriptions, under the same name or as its synony...
Article
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Cyclocotyla bellones Otto, 1823 (Monogenea, Diclidophoridae) is one of the few monogenean species reported as hyperparasitic: the worms dwell on cymothoid isopods, themselves parasites of the buccal cavity of fishes. We present here observations based on newly collected monogenean specimens from Ceratothoa parallela (Otto, 1828), an isopod parasite...
Article
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Aim Alien species introduced into new ecosystems occasionally predate upon or outcompete native species. Land planarians (Geoplanidae) are a family of carnivorous Platyhelminthes among which several species are found outside their native range. Specifically, hammerhead flatworms originate from Asia and Madagascar but have now reached many new locat...
Article
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A popular piece about the world invasion by hammerhead flatworms. In French.
Article
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The taxonomy of species of Bivesicula Yamaguti, 1934 is analysed for samples from holocentrid, muraenid and serranid fishes from Japan, Ningaloo Reef (Western Australia), the Great Barrier Reef (Queensland), New Caledonia and French Polynesia. Analysis of three genetic markers ( cox 1 mtDNA, ITS2 and 28S rDNA) identifies three strongly supported cl...
Article
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A popular piece about the species Diversibipalium mayottensis (Platyhelminthes, Tricladida, Geoplanidae) recently described from Mayotte, Indian Ocean. In French.
Preprint
Full-text available
The land flatworm Obama nungara, a species originating from South America and already invasive in many European countries, is recorded from La Réunion, a French island in the Indian Ocean. This is the first record of O. nungara from this locality and also the first record of the species for Africa. Two specimens were collected, one from Petite Fran...
Article
Full-text available
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, i...
Article
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Background The family Plectanocotylidae includes parasites of the gills of marine fish; although nine genera and about 20 species have been described, almost no molecular information is available. Putting aside Plectanocotyle elliptica Diesing, 1850, supposedly a parasite of the white perch Morone americana , never found again since its original de...
Article
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Alien land planarians have been scarcely recorded in Italy and the aim of this work was to update the distribution of alien planarians in Italy using a citizen science and, whenever possible, a molecular approach. We received 133 records of at least 15 species (Anisorhynchodemus cf. signata, Australopacifica atrata, Australoplana cf. sanguinea alba...
Chapter
Nous sommes émerveillés par la diversité de formes et de couleurs des poissons des récifs coralliens mais, en regardant de plus près, nous découvrons un monde insoupçonné, celui de leurs parasites ! Ceux-ci se logent dans les différents organes et sont pour leur grande majorité méconnus. S'il existe environ 1 700 espèces de poissons de récifs dans...
Chapter
Certaines espèces connaissent un succès phénoménal, mais souvent aux dépens de leurs congénères. Telle est l’histoire de ce ver plat à la tête en forme de marteau, qui mange les vers de terre et dont plusieurs espèces sont maintenant présentes en France, chacune avec sa biologie et son histoire singulière. L’étude de ce ver a permis d’identifier le...
Poster
Full-text available
Annual meeting of the French Society of Parasitology
Article
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Many Pauciconfibula spp. have a long and complicated taxonomic history. The remaining unsolved taxonomic confusion in this genus is impelled by the host range and status of Pauciconfibula spp. from trachinid fishes: Pauciconfibula trachini and Pauciconfibula draconis, from Trachinus radiatus and Trachinus draco (Trachinidae), respectively. Paucicon...
Article
Full-text available
Cyclocotyla bellones Otto, 1823 (Diclidophoridae) is a monogenean characterised by an exceptional way of life. It is a hyperparasite that attaches itself to the dorsal face of isopods, themselves parasites in the buccal cavity of fishes. In this study, Cy. bellones was found on Ceratothoa parallela (Otto, 1828), a cymothoid isopod parasite of the s...
Article
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Based on light and electron microscopical studies, a new nematode parasite, Echinocephalus inserratus sp. n. (Spirurida: Gnathostomatidae), is described from the spiral valve of the broad cowtail stingray Pastinachus ater (Macleay) (Dasyatidae, Myliobatiformes) from off New Caledonia. The new species is morphologically and biometrically most simila...
Poster
Full-text available
Poster presented during The Ocean Fellowship Program : a funded research opportunity offered by TBA21–Academy and held at Ocean Space in Venice, Italy. The 2021 edition in which I participated, is closely affiliated with the exhibition The Soul Expanding Ocean #1: Taloi Havini, to be held at Ocean Space. The fellowship also forms an integral part o...
Article
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Four polyopisthocotyleans were collected from the gill filaments of carangids from off the Algerian coast, southern Mediterranean. Specimens of Gastrocotyle trachuri van Beneden & Hesse, 1863 (Gastrocotylidae) and Cemocotyle cf. trachuri Dillon & Hargis, 1965 (Heteraxinidae) from the Mediterranean horse mackerel Trachurus mediterraneus (Steindachne...
Article
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A short paper for the general public, published in "The Conversation". In French.
Article
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The land flatworm Platydemus manokwari (Platyhelminthes, Geoplanidae) is recorded from the islands of Guadeloupe, Martinique, and Saint Martin in the Caribbean arc. Photographs and records were obtained mainly from citizen science and ranged from the end of 2018 to February 2021; several specimens were deposited in the collections of the Muséum Nat...
Article
PurposeThe nematode Ascarophis distorta Fusco et Overstreet, 1978 (Cystidicolidae), originally described from the butterflyfish Chaetodon paucifasciatus Ahl (Perciformes, Chaetodontidae) in the Red Sea, was established based solely on the light microscopical (LM) examination of specimens. However, the present taxonomy of cystidicolid nematodes is m...
Poster
Full-text available
-Activity: REMOTE CROSSBORDER TRAINEESHIP PROGRAMME for young professionals in the marine and maritime field -Hosting Organization: ISYEB - Institut de Systématique Évolution Biodiversité, MNHN - Muséum National d’Histoire Naturelle -Country: France -Dates: From 01/10/2020 – to 31/12/2020 -Project: DEEP BLUE: Developing Education and Employment Par...
Article
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The diclidophorid Flexophora ophidii Prost & Euzet, 1962, the type- and only species of the genus Flexophora Prost & Euzet, 1962, has never been redescribed neither reported since its original description. The latest lacked a diagnosis of the genus that remains unavailable to date. Flexophora ophidii is redescribed and illustrated based on examinat...
Article
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The ultrastructure of the mature spermatozoa of Tergestia clonacantha and T. laticollis collected from the digestive tracts of fishes from New Caledonia is described using transmission electron microscopy and compared to that of related species. The spermatozoa of the two species exhibit the general pattern described in most digeneans, namely two a...
Article
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Helminthological examinations of three species of sharks, Galeocerdo cuvier, Triaenodon obesus (both Carcharhinidae, Carcharhiniformes) and Stegostoma fasciatum (Stegostomatidae, Orectolobiformes) from New Caledonian waters, carried out during 2003-2005, revealed the presence of three species of adult anisakid nematodes referable to Terranova Leipe...
Article
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Background The land flatworm Amaga expatria Jones & Sterrer, 2005 (Geoplanidae) was described from two specimens collected in Bermuda in 1963 and 1988 and not recorded since. Methods On the basis of a citizen science project, we received observations in the field, photographs and specimens from non-professionals and local scientists in Martinique...
Article
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A short paper in "The Conversation" about the invasion of Guadeloupe and Martinique (French West Indies) by land flatworms.
Preprint
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Alien land flatworms (family Geoplanidae) are invading many countries in the world. Some can easily be identified by their morphology and colour pattern, but some are more cryptic and necessitate a molecular approach. Caenoplana decolorata Mateos et al., 2020 was recently described, from specimens found in Spain, as a sibling species to C. coerulea...
Article
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The presence/absence and number of vaginae is a major characteristic for the systematics of the Monogenea. Three gastrocotylid genera share similar morphology and anatomy but are distinguished by this character: Pseudaxine Parona & Perugia, 1890 has no vagina, Allogastrocotyle Nasir & Fuentes Zambrano, 1983 has two vaginae, and Pseudaxinoides Lebed...
Article
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A collection of nematodes from the Muséum National d’Histoire Naturelle (National Museum of Natural History), Paris, France, was studied. The nematodes had previously been collected from a range of marine fish hosts. The aim of this study was to investigate the identity of these nematodes. Detailed body measurements of the nematodes were taken via...
Article
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A short popular science article about species of monogeneans in groupers of the Mediterranean Sea. Published in "The Conversation".
Article
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A short paper in "The Conversation" about monogeneans parasitic on the gills of groupers. In French.
Article
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Recent examinations of cucullanid nematodes (Cucullanidae) from marine fishes off New Caledonia, collected in the years 2004–2009, revealed the presence of the following five new species of Cucullanus Müller, 1777, all parasitic in Perciformes: Cucullanus variolae n. sp. from Variola louti (type host) and V . albimarginata (both Serranidae); Cucull...
Article
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We sequenced the complete mitogenome of the invasive flatworm Parakontikia ventrolineata (Platyhelminthes, order Tricladida, family Geoplanidae). The genome is 17,210 bp long, and displays common unusual characteristics shared with Platydemus manokwari, such as its colinearity, an overlap between ND4L and ND4 genes and an unusually long cox2 genes....
Preprint
Full-text available
The land flatworm Platydemus manokwari (Platyhelminthes, Geoplanidae) is recorded for the first time from the island of Guadeloupe (French West Indies) in the Caribbean arc. Photographs and records were obtained from citizen science and ranged from the end of 2018 to 2020; specimens were deposited in the collections of the Muséum National d'Histoir...
Article
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A short paper in The Conversation about the covid-19 pandemic and its origin.
Article
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We sequenced the complete mitogenome of the invasive flatworm Platydemus manokwari (Tricladida order, Geoplanidae family). This 19,959-bp genome contains 36 genes and is almost colinear with the mitogenomes of the two other species previously sampled from the Geoplanidae, Bipalium kewense and Obama nungara, both of which feature an extra tRNA gene....
Article
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Based on light and scanning electron microscopical studies, a new nematode parasite, Paracapillaria (Paracapillaria) gastrica n. sp. (Capillariidae), is described from the stomach of the marine fish (variegated lizardfish) Synodus variegatus (Lacépède) (Aulopiformes: Synodontidae) from off New Caledonia. This species is mainly characterised by the...
Article
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Recent examinations of anisakid nematodes (Anisakidae) from marine fishes off New Caledonia, collected in the years 2003–2008, revealed the presence of the following five new species of Raphidascaris Railliet et Henry, 1915, all belonging to the subgenus Ichthyascaris Wu, 1949: Raphidascaris ( Ichthyascaris ) spinicauda n. sp. from the redbelly yel...
Article
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A short paper in French in "The Conversation" about covid-19 epidemiology and biodiversity.
Article
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Background Obama nungara is a species of land flatworm originating from South America; the species was recently described and distinguished from a similar species, Obama marmorata . Obama nungara has invaded several countries of Europe, but the extent of the invasion has not been thoroughly mapped. Methods In this article, based on a five and a ha...
Article
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A short paper in French in "The Conversation" about the invasion of Metropolitan France by the land flatworm Obama nungara. Article en français dans "The Conversation" à propos de l'invasion de la France Métropolitaines par le Plathelminthe terrestre Obama nungara.
Article
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A short paper in English in "The Conversation" about the invasion of Metropolitan France by the land flatworm Obama nungara. This paper was written for a general public and was based on our scientific paper published in PeerJ: https://peerj.com/articles/8385/ . Article en anglais dans "The Conversation" à propos de l'invasion de la France Métrop...
Article
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Recent examinations of spirurid nematodes (Spirurida) from deep-sea or coral reef marine fishes off New Caledonia, collected in the years 2006-2009, revealed the presence of the following five species: Ichthyofilaroides novaecaledoniensis (Moravec et Justine, 2009) n. gen., n. comb. (transferred from Ichthyofilaria Yamaguti, 1935) (females) (Guyane...
Article
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A short paper in French in "The Conversation" about the evaluation of the number of animals lost in the bushfires in Australia. The conclusion is that more than one million billion animals (10^15) were killed, if invertebrates are included.
Article
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Recent examinations of camallanid nematodes (Camallanidae) from marine fishes off New Caledonia, collected in the years 2003-2011, revealed the presence of the following five new species of Procamallanus Baylis, 1923, all belonging to the subgenus Spirocamallanus Olsen, 1952: Procamallanus (Spirocamallanus) dispar n. sp. from the common ponyfish Le...
Article
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Allogastrocotyle bivaginalis Nasir & Fuentes Zambrano, 1983, the sole species of Allogastrocotyle Nasir & Fuentes Zambrano, 1983, was described from Trachurus lathami Nichols off Venezuela and never recorded since. We found monogeneans on Trachurus picturatus (Bowdich) (Carangidae) off the Algerian coast, Mediterranean Sea, which had the characteri...
Article
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Based on a molecular and morphological study, a new monocotylid genus, Holocephalocotyle n. gen. is proposed to accommodate Holocephalocotyle monstrosae n. sp., found on the olfactory rosette of the rabbit fish, Chimaera monstrosa Linnaeus (Chondrichthyes, Chimaeridae), from the Mediterranean Sea off Algeria. Identification of fish hosts was confirmed...
Article
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Specimens of Bipalium adventitium (Platyhelminthes, Geoplanidae) were found in Montréal, Québec, Canada. The specimens showed the typical colour pattern of the species and barcoding (Cytochrome Oxidase I) demonstrated near-identity with a sequence of the same species from the USA. This is the first record of the species in Canada.
Article
Dans le contexte du réchauffement climatique et de multiples autres causes humaines (déplacements globalisés en tête), des espèces changent d’aire de répartition avec l’aide de l’homme. La perte globale de biodiversité constatée sur Terre facilite ce processus, rendant les écosystèmes encore plus vulnérables et sensibles aux espèces envahissantes....
Article
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The monogenean Microcotyle erythrini is atypical because it has been recorded from several fish host species in the Mediterranean Sea and Atlantic Ocean, in contrast to many species which are considered strictly specific. This could indicate a true lack of specificity or that several cryptic species are involved. This paper is a partial attempt to...
Article
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We determined the sequence of the complete mitogenome of Bipalium kewense, an invasive land flat-worm with worldwide distribution. All 37 genes encoded on this 15,666-bp genome reside on the same DNA strand. Phylogenomic analyses of mitochondrial proteins from taxa of the order Tricladida associated B. kewense with another invasive species of land...
Article
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Two species of cucullanid nematodes collected from the intestine of marine fishes off New Caledonia were studied with the use of light and scanning electron microscopy (SEM): Dichelyne (Cucullanellus) bodiani n. sp. from Bodianus perditio (Quoy & Gaimard) (Perciformes: Labridae), characterised mainly by the small size of the body (males and gravid...