#Monogenea
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parasitejournal.bsky.social
New paper in press:
Redescription, with molecular information, of Trinigyrus peregrinus (Monogenea: Dactylogyridae) from the invasive Pterygoplichthys pardalis in southern China 🧪🐟
Soon... www.parasite-journal.org
October 9, 2026 at 7:37 AM
harryseaotter.art
It's the perfect comparison. There are four classes of flatworms, three of which are entirely or almost entirely parasitic:
Turbellaria (free-swimming predators)
Cestoda (tapeworms, no digestive system)
Monogenea (external parasites of fish)
Trematoda (flukes, this is the most apt comparison)
October 5, 2026 at 10:16 PM
isyeb.mnhn.fr
In #Parasitologia,5(1) #OpenAccess
"A New Species of Anthocotyle (Polyopisthocotyla : Discocotylidae) from the Gills of the European Hake Merluccius merluccius (Teleostei, Merlucciidae...."
By Bouguerche,C. @isyeb.mnhn.fr
#Monogenea #Mediterranean #genus #parasitic_worm
🪱 doi.org/10.3390/para...
January 29, 2025 at 9:41 AM
cp-trendsparasitol.bsky.social
#crustacea #monogenea #protists #waterquality
August 29, 2025 at 10:15 AM
cp-trendsparasitol.bsky.social
Parasite of the Month: #Sparicotyle #chrysophrii, an #oviparous #hermaphroditic #polyopisthocotylean found on the #gills of the #gilthead #seabream, authored by Ivona Mladineo. #Platyhelminthes #Monogenea #Sparus #aurata @utas.edu.au @czechacademy.bsky.social

authors.elsevier.com/a/1kRPm5Eb1x...
February 3, 2025 at 9:08 PM
fishnchipslab.bsky.social
Very pleased to announce our latest study on cryptic diversity within Monogenea lead by 🇧🇷 colleagues 🧪
www.sciencedirect.com/science/arti...
Unveiling hidden diversity in Cosmetocleithrum (Monogenoidea: Dactylogyridae) from thorny catfishes (Doradidae) endemic to South America: Two new species, morphological variation, and molecular phylog...
The Cosmetocleithrum represents the most diverse group of monogenoids parasitizing Neotropical doradid catfishes. In this study, based on morphologica…
www.sciencedirect.com
September 5, 2025 at 7:17 AM
scienceopen.bsky.social
'Role of Trachemys scripta elegans in polystome (Platyhelminthes, Monogenea, Polystomatidae) spillover and spillback following the trade of freshwater turtles in southern Europe and North America' - an @parasitejournal.bsky.social article on #ScienceOpen:

🔗 www.scienceopen.com/document?vid...
Role of <i>Trachemys scripta elegans</i> in polystome (Platyhelminthes, Monogenea, Polystomatidae) spillover and spillback following the trade of freshwater turtles in southern Europe and North Americ...
<p xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" class="first" dir="auto" id="d3944581e218">The red-eared slider, <i>Trachemys scripta elegans</i> (Wied, 1938), has been introduce...
www.scienceopen.com
June 17, 2025 at 8:46 AM
irbio-ub.bsky.social
#ArticleIRBio
📄Evaluating topological variability in Neodermata phylogenies using mitochondrial and ribosomal gene markers

👥 Authors: V. Hugo Caña-Bozada, Belén Mera-Loor, D. I. Hernández-Mena, JL. Justine, M. Álvarez-Presas (IRBioUB)

🔗 doi.org/10.1371/jour...
@martaalvarez.bsky.social
Evaluating topological variability in Neodermata phylogenies using mitochondrial and ribosomal gene markers
The Neodermata is a group of parasitic flatworms that includes the classes Trematoda, Cestoda, and Monogenea. Understanding the phylogenetic relationships within the Neodermata has been a longstanding...
doi.org
October 17, 2025 at 7:54 AM
chahi-bouguerche.bsky.social
Meet our new #Monogenea #Microcotyle odhnaturiks n. sp. from Sweden🇸🇪, the 1st #Microcotyle reported from #Scandinavia, discovered in T. Odhner’s historic collection.
Etymology:
*Odh–Odhner
*Naturiks–Naturhistoriska Riksmuseet + "-iks" (origin)

A tribute to #museum 🏰 & collections!🥂

t.co/b9zsx9KOfz
May 13, 2025 at 7:10 AM
chahi-bouguerche.bsky.social
🔜 in Journal of Helminthology
🔬 We redescribed two little-known #Monogenea, Chauhanea mediterranea & Rhinecotyle crepitacula ex the European barracuda Sphyraena sphyraena
🔹 Pseudochauhanea & Cotyloatlantica synonymized with Chauhanea
🔹 New species combinations & revised morphology
March 14, 2025 at 2:28 PM
chahi-bouguerche.bsky.social
🚨 New #Monogenea species !

👉 We describe Choricotyle justinemusei n. sp. 🔬🧬, named after @jean-lou-justine.bsky.social from @isyeb.mnhn.fr
👉 We clarify the taxonomic status of related congeneric species from sparids
👉 C. pagelli & C. marionis are reinstated as valid species

📰 rdcu.be/eccIG
A Closer Look at the Choricotyle chrysophryi-like (Polyopisthocotyla: Diclidophoridae) Species Complex: Description of a New Choricotyle from the Gills of Pagellus acarne (Teleostei: Sparidae) and Rev...
rdcu.be
March 5, 2025 at 9:03 AM
chahi-bouguerche.bsky.social
🚨 New #Monogenea! Revisiting Anthocotyle merluccii taxonomy:
👉 We describe A. radkeaminorum n. sp. from the Mediterranean, with clear differences from A. merluccii and A. americanus 🧬🔬 .
👉 🧬 refutes their synonymy, & we caution against using hook morphology for species IDs
📄 doi.org/10.3390/para...
isyeb.mnhn.fr ISYEB @isyeb.mnhn.fr · Jan 29
In #Parasitologia,5(1) #OpenAccess
"A New Species of Anthocotyle (Polyopisthocotyla : Discocotylidae) from the Gills of the European Hake Merluccius merluccius (Teleostei, Merlucciidae...."
By Bouguerche,C. @isyeb.mnhn.fr
#Monogenea #Mediterranean #genus #parasitic_worm
🪱 doi.org/10.3390/para...
March 5, 2025 at 9:00 AM
axonvet.bsky.social
#axónvet #informaciónveterinaria #saludanimal #ocular #infestación #vacas 
Caso clínico: Manejo y secuelas oftálmicas a largo plazo de la infestación ocular monogénea en rayas nariz de vaca (Rhinoptera bonasus)
Caso clínico: Manejo y secuelas oftálmicas a largo plazo de la infestación ocular monogénea en rayas nariz de vaca (Rhinoptera bonasus)
axoncomunicacion.net
November 1, 2025 at 7:02 PM
fish-worms-lab.bsky.social
一つ大事な研究を紹介し忘れていました。沖縄のオオヒメに寄生していた新種の単生類の記載なんですが、献名した思い入れのある研究です。
詳細は、以下のを読んでいただければ、幸いです。
note.com/fish_and_wor...
論文が出版されました2｜さかなとムシの研究所
先日、所員（研究所としているので）の書いた論文が出版されました。”Description of a new species, Pseudodiscocotyla mikiae n. sp. (Monogenea: Discocotylidae) parasitic on gills of Pristipomoides filamentosus from off Okinawa‐jima islan...
note.com
April 19, 2025 at 10:45 AM
parasitejournal.bsky.social
Monogeneans on exotic Indian freshwater fish. 8. Co-translocation of Cichlidogyrus tilapiae (Monogenea, Dactylogyridae) with pindani Chindongo socolofi (Cichliformes, Cichlidae): first report of this parasite genus in India within aquarium trade facilities 🧪
doi.org/10.1051/para...
August 1, 2025 at 10:00 AM
parasitejournal.bsky.social
New paper today:
Monogeneans on exotic Indian freshwater fish. 8. Co-translocation of Cichlidogyrus tilapiae (Monogenea, Dactylogyridae) with pindani Chindongo socolofi : first report of this parasite genus in India within aquarium trade facilities 🧪
www.parasite-journal.org/articles/par...
Photomontage of light microscopy and phase contrast (PHACO) images of Cichlidogyrus tilapiae Paperna, 1960 from Chindongo socolofi (Johnson, 1974). A. anchor-bar complex and hooks, B and C. different configurations of male copulatory organ, D. vagina. Photograph by Amit Tripathi.
July 29, 2025 at 7:52 AM
parasitejournal.bsky.social
Now in press:
Monogeneans on exotic Indian freshwater fish. 8. Co-translocation of Cichlidogyrus tilapiae (Monogenea, Dactylogyridae) with pindani Chindongo socolofi (Cichliformes, Cichlidae): first report of this parasite genus in India within aquarium trade facilities🧪
🔜 www.parasite-journal.org
Fig. 2 Photomontage of light microscopy and phase contrast (PHACO) images of Cichlidogyrus tilapiae Paperna, 1960 from Chindongo socolofi (Johnson, 1974). A. anchor-bar complex and hooks, B and C. different configurations of male copulatory organ, D. vagina. Photograph by Amit Tripathi
July 11, 2025 at 7:21 AM
parasitejournal.bsky.social
𝗡𝗲𝘄 𝗽𝗮𝗽𝗲𝗿 𝘁𝗼𝗱𝗮𝘆 𝗶𝗻 𝗣𝗮𝗿𝗮𝘀𝗶𝘁𝗲:
Role of Trachemys scripta elegans in polystome (Platyhelminthes, Monogenea, Polystomatidae) spillover and spillback following the trade of freshwater turtles in southern Europe and North America 🧪🐢
www.parasite-journal.org/articles/par...
Trachemys scripta : Public domain from Wikimedia Phylogram of chelonian polystome species derived from the tree depicted in Figure 2 after collapsing haplotypes referring to the same species. Polystome species in blue refer to polystomes infecting the conjunctival sacs, in red the urinary bladder and in green the oral cavity of American turtles. Polystomatidae sp1 and sp2, which also infect American turtles, were not highlighted as the infection site was not determined.
May 21, 2025 at 7:46 AM
parasitejournal.bsky.social
New paper now in press in Parasite:
Role of Trachemys scripta elegans in polystome (Platyhelminthes, Monogenea, Polystomatidae) spillover and spillback following the trade of freshwater turtles in southern Europe and North America
🧪🔜 www.parasite-journal.org
Figure 3. Phylogram of chelonian polystome species derived from the tree depicted in Figure 2 after collapsing haplotypes referring to the same species. Polystome species in blue refer to polystomes infecting the conjunctival sacs, in red the urinary bladder and in green the oral cavity of American turtles. Polystomatidae sp1 and sp2, which also infect American turtles, were not highlighted as the infection site was not determined.
April 10, 2025 at 8:08 AM
parasitejournal.bsky.social
Genomic resources for the Monogenea are scarce.
This work generated de novo-assembled transcriptomes of two monogenean species. [2020 🧪]

More: doi.org/10.1051/para...
Assignment of Gene Ontology (GO) terms for the Rhabdosynochus viridisi and Scutogyrus longicornis ORFs. The number in the graph indicates the percent of ORFs related to Cellular Component terms.
February 24, 2025 at 9:23 PM
parasitejournal.bsky.social
𝗡𝗼 𝘃𝗮𝗴𝗶𝗻𝗮, 𝗼𝗻𝗲 𝘃𝗮𝗴𝗶𝗻𝗮, 𝗼𝗿 𝗺𝘂𝗹𝘁𝗶𝗽𝗹𝗲 𝘃𝗮𝗴𝗶𝗻𝗮𝗲?
An integrative study of the monogenean Pseudaxine trachuri
[2020🧪]
The presence/absence and number of vaginae is a major characteristic for the systematics of the Monogenea.
More details: doi.org/10.1051/para...
Micrographs of specimens showing the region of the genital atrium and vaginae (arrows). Left, Pseudaxine trachuri, no vagina visible; Middle, Pseudaxine trachuri, alleged multiple vaginae, two different focuses on the same specimen; Right, Allogastrocotyle bivaginalis, two real vaginae. Unscaled, same scale for all micrographs.
February 13, 2025 at 8:44 PM
parasitejournal.bsky.social
Parasite biodiversity of fish in coral reefs of the South China Sea is still incompletely explored. This paper described a new species of Neohexostoma (Monogenea: Hexostomatidae) from the gills of the dogtooth tuna Gymnosarda unicolor (Scombridae).🧪

More: doi.org/10.1051/para...
Photographs of Neohexostoma gymnosardae n. sp. (A) Holotype, whole worm (ventral view); (B) Male copulatory organ; (C) Vaginal spines; (D) Haptor; (E)–(F) Eggs; (G) Clamp with sclerites in lateral view. (B)–(G) are paratypes.
February 13, 2025 at 8:26 PM
parasitejournal.bsky.social
𝗛𝗼𝘀𝘁-𝘀𝗽𝗲𝗰𝗶𝗳𝗶𝗰 𝗺𝗼𝗻𝗼𝗴𝗲𝗻𝗲𝗮𝗻𝘀 𝗽𝗮𝗿𝗮𝘀𝗶𝘁𝗶𝘇𝗶𝗻𝗴 𝗳𝗿𝗲𝘀𝗵𝘄𝗮𝘁𝗲𝗿 𝗳𝗶𝘀𝗵

Using case studies, especially those in Dactylogyrus parasitizing cyprinoid #fish, this article by Andrea Šimková presents current knowledge on the #ecology and #evolution of congeneric gill monogeneans.🧪
doi.org/10.1051/para...
Abstract Monogenea (Platyhelminthes), mainly gill and fin ectoparasites of fish, are often recognized as host specific and morphologically and ecologically diverse. These parasites exhibit high species diversity at the level of host species or individual fish specimens. Using case studies, especially those widely performed in Dactylogyrus parasitizing cyprinoid fish, this article presents current knowledge on the ecology and evolution of congeneric gill monogeneans. The important aspects of the ecology of congeneric monogeneans are highlighted, in particular: host specificity expressed at several host levels (from strict specificity to phylogenetic specificity), microhabitat specificity expressed by restricted positions on fish gills to facilitate intraspecific mating, and the link between microhabitat preference and morphological adaptation (i.e., sclerotized structures of the haptor) or reproductive isolation. From the evolutionary perspective, this study focused on the processes of the speciation and diversification of congeneric monogeneans, highlighting the role of host switch as the most prominent coevolutionary event, accompanied in some cases mostly by intrahost speciation or cospeciation, as revealed by cophylogenetic studies. Here, important knowledge on evolutionary patterns of host specificity, microhabitat specificity, and morphological adaptation is presented. Host-specific monogeneans may represent an important tool for studying the historical biogeography of their hosts. Specifically, in the case of freshwater fish hosts exhibiting disjunctive distribution, they reflect both historical and contemporary contacts. The role of host-specific congeneric monogeneans in revealing historical intercontinental and intracontinental contacts between freshwater fish is highlighted. Finally, the importance of the role of genetic coadaptation, limiting the presence of host-specific monogeneans in hybrid fish, is emphasized.
January 6, 2025 at 10:03 AM
parasitejournal.bsky.social
Parasites (Monogenea) of tilapias Oreochromis niloticus and Coptodon rendalli (Cichlidae) in a river spring in Brazil
doi.org/10.1051/para...
Abstract In the present study, we examined 30 individuals of introduced African cichlids, Oreochromis niloticus and Coptodon rendalli, collected in a river spring of the Pardo River, Paranapanema River basin, southeastern Brazil. Based on morphological and molecular analyses of the partial LSU rDNA gene, we identified four species of monogeneans, Cichlidogyrus tilapiae, C. thurstonae, C. mbirizei, and Scutogyrus longicornis on the gills of O. niloticus, whereas individuals of C. rendalli were infested only with C. papernastrema. This is the first record of C. mbirizei and C. papernastrema in tilapias from Brazil. The ecological consequences of the introduction of exotic species of tilapia such as O. niloticus and C. rendalli along with their monogenean parasites in a wild environment represented by a river spring are discussed. Our new molecular data on Cichlidogyrus and Scutogyrus contribute to the investigation of the phylogenetic interrelationships of these widely distributed genera of monogeneans since their species composition is still unsettled.
December 16, 2024 at 9:50 AM
lbachmann.bsky.social
Congratulations to the team !!! Eventually the paper entitled 'Geographic differentiation of ectoparasitic flatworms in the pelagic zone of Lake Tanganyika, Africa' by Kmentova et al. was published in Frontiers in Zoology (link.springer.com/article/10.1...).

#monogenea #parasites #mitogenomes
Geographic differentiation of ectoparasitic flatworms in the pelagic zone of Lake Tanganyika, Africa - Frontiers in Zoology
Monopisthocotylan parasites have been proposed as tags for studying host population structure due to their direct life cycles and short generation times. However, their effectiveness in reflecting hos...
link.springer.com
May 13, 2026 at 6:21 AM