Koinocystididae and Gnathorhynchidae (Platyhelminthes: Rhabdocoela: &lt;br /&gt;Kalyptorhynchia) from the Galapagos, with the description of three new species

Reygel, Patrick; Willems, Wim; Artois, Tom

doi:10.11646/zootaxa.3096.1.3

Cited by 8 publications

(20 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the existing light-microscopic studies, a condition similar to that in P. busheki would appear to occur in P. dividibulbosus (Ax & Armonies 1990: fig. 55A) and P. eurytubua (Reygel et al 2011: fig. 1).…”

Section: Discussion Within Prognathorhynchusmentioning

confidence: 97%

“…Hochberg ; Reygel et al. ). Accordingly, careful morphological reinvestigation and concurrent molecular studies are likely to improve our understanding of evolution in this group and allow refinement of the taxonomy within Gnathorhynchidae.…”

mentioning

confidence: 99%

“…Not surprisingly, studies of individual species within this group using more modern methods have revealed anatomical detail that was simply missed in the original descriptions (such as the female genital tractcf. Hochberg 2004;Reygel et al 2011). Accordingly, careful morphological reinvestigation and concurrent molecular studies are likely to improve our understanding of evolution in this group and allow refinement of the taxonomy within Gnathorhynchidae.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Structure of the male copulatory apparatus in Prognathorhynchus busheki (Platyhelminthes, Kalyptorhynchia)

Doe

Smith

2016

Invertebrate Biology

View full text Add to dashboard Cite

Gnathorhynchidae is a diverse taxon of predatory eukalyptorhynch flatworms characterized by an armed proboscis. Their present taxonomy is not concordant with what we know of their phylogeny. Further progress in this area is hindered by a lack of information concerning their morphology. As recent studies have shown, a historical reliance on live observations for species descriptions has resulted in a number of errors and omissions. Here, we redescribe the anatomy of the male copulatory organ of Prognathorhynchus busheki using transmission-electron and confocal microscopy, correcting several errors in the original description. Furthermore, we use these results to update our understanding of the anatomy and evolution of male copulatory organs in Gnathorhynchidae and in Platyhelminthes more generally.

show abstract

Section: Discussion Within Prognathorhynchusmentioning

confidence: 97%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Structure of the male copulatory apparatus in Prognathorhynchus busheki (Platyhelminthes, Kalyptorhynchia)

Doe

Smith

2016

Invertebrate Biology

View full text Add to dashboard Cite

show abstract

“…PCR products were commercially purified and sequenced by Macrogen Europe B.V. (Amsterdam) under BigDye TM terminator cycling conditions on an ABI3730XL DNA Sequencer. Specimens collected in Vancouver, Canada (U. heinckei, Rhinolasius dillonicus Karling, 1980 andItaipusa biglandula Reygel, Willems &Artois, 2011) were processed following the methodology of .…”

Section: Methodsmentioning

confidence: 99%

“…Afterward, he considered it a separate family (Meixner, 1925), at that moment including three species: Koinocystis sophiae Graff (1905) [now Itaipusa sophiae (Graff, 1905) Karling, 1978], K. neocomensis (Fuhrmann, 1904) Meixner, 1924and Anoplorhynchus piger Meixner, 1925[= Sekerana stolzi (Sekera, 1912 Strand, 1914; see Karling 1980]. Since then many new species and genera have been described, and the taxonomy was discussed and refined by several authors: Marcus (1949Marcus ( , 1951Marcus ( , 1954, Karling (1952aKarling ( , 1952bKarling ( , 1954Karling ( , 1964Karling ( , 1978Karling ( , 1980, Brunet (1972), Reygel et al (2011), Willems et al (2017), and Lin et al (2017). Currently, Koinocystididae includes 24 accepted genera and 51 accepted species (Tyler et al 2006(Tyler et al -2020.…”

Section: Introductionmentioning

confidence: 99%

Taxonomy and phylogeny of Koinocystididae (Platyhelminthes, Kalyptorhynchia), with the description of three new genera and twelve new species

Diez

Monnens

Aguirre³

et al. 2021

Zootaxa

998

View full text Add to dashboard Cite

The taxon Koinocystididae is the third most species-rich family within Eukalyptorhynchia. However, its diversity and phylogeny have been largely neglected in former studies. We introduce three new genera and twelve new species of Koinocystididae including Simplexcystis asymmetrica gen. n. sp. n., Galapagetula cubensis sp. n., eight species of Reinhardorhynchus gen. n. and two species of Itaipusa. This raises the total number of species within Koinocystididae from 51 to 63. We also report on new distribution records for six known species: I. divae (Cuba, Panama and New Caledonia), I. karlingi (Sardinia and Lanzarote), Reinhardorhynchus riegeri comb. n. (Cuba), R. ruffinjonesi comb. n. (Cuba and Panama), Utelga heinckei (Cuba and Lanzarote), and U. pseudoheinckei (Sardinia). Simplexcystis asymmetrica gen. n. sp. n. is characterised by a male duct running eccentrically through the copulatory bulb, lack of any hard structures in the male system, lack of a bursa, and the fact that the epithelia of the female, the male, and part of the common atrium are covered by a brush border. Galapagetula cubensis sp. n. has a caudal gonopore, a divisa-type copulatory bulb with an unarmed penis papilla, and a female duct without a sphincter. The new species of Itaipusa and Reinhardorhynchus gen. n. differ from their congeners in the detailed structure of the copulatory bulb and especially the hard structures associated with it. In a molecular phylogenetic analysis based on all available 18S and 28S rDNA sequences of koinocystidids, we found support for the monophyly of the family and the genus Utelga Marcus, 1949. The genus Itaipusa is not monophyletic in that I. sinensis forms a clade with Rhinolasius dillonicus, while other species of Itaipusa that have a copulatory bulb armed with hooks form a clade together with Sekerana stolzi. As the type species of Itaipusa (I. divae) is in neither of these clades, we erected a new genus for I. sinensis (Koinogladius gen. n.) and one for species of Itaipusa having a hook-bearing copulatory bulb (Reinhardorhynchus gen. n.), respectively. Whether the remaining species of Itaipusa form a monophylum remains uncertain.

show abstract

Patterns of host-parasite associations between marine meiofaunal flatworms (Platyhelminthes) and rhytidocystids (Apicomplexa)

Van Steenkiste,

Wakeman,

Söderström

et al. 2023

Sci Rep

View full text Add to dashboard Cite

Microturbellarians are abundant and ubiquitous members of marine meiofaunal communities around the world. Because of their small body size, these microscopic animals are rarely considered as hosts for parasitic organisms. Indeed, many protists, both free-living and parasitic ones, equal or surpass meiofaunal animals in size. Despite several anecdotal records of “gregarines”, “sporozoans”, and “apicomplexans” parasitizing microturbellarians in the literature—some of them dating back to the nineteenth century—these single-celled parasites have never been identified and characterized. More recently, the sequencing of eukaryotic microbiomes in microscopic invertebrates have revealed a hidden diversity of protist parasites infecting microturbellarians and other meiofaunal animals. Here we show that apicomplexans isolated from twelve taxonomically diverse rhabdocoel taxa and one species of proseriate collected in four geographically distinct areas around the Pacific Ocean (Okinawa, Hokkaido, and British Columbia) and the Caribbean Sea (Curaçao) all belong to the apicomplexan genus Rhytidocystis. Based on comprehensive molecular phylogenies of Rhabdocoela and Proseriata inferred from both 18S and 28S rDNA sequences, as well as a molecular phylogeny of Marosporida inferred from 18S rDNA sequences, we determine the phylogenetic positions of the microturbellarian hosts and their parasites. Multiple lines of evidence, including morphological and molecular data, show that at least nine new species of Rhytidocystis infect the microturbellarian hosts collected in this study, more than doubling the number of previously recognized species of Rhytidocystis, all of which infect polychaete hosts. A cophylogenetic analysis examining patterns of phylosymbiosis between hosts and parasites suggests a complex picture of overall incongruence between host and parasite phylogenies, and varying degrees of geographic signals and taxon specificity.

show abstract

Koinocystididae and Gnathorhynchidae (Platyhelminthes: Rhabdocoela: <br />Kalyptorhynchia) from the Galapagos, with the description of three new species

Cited by 8 publications

References 10 publications

Structure of the male copulatory apparatus in Prognathorhynchus busheki (Platyhelminthes, Kalyptorhynchia)

Structure of the male copulatory apparatus in Prognathorhynchus busheki (Platyhelminthes, Kalyptorhynchia)

Taxonomy and phylogeny of Koinocystididae (Platyhelminthes, Kalyptorhynchia), with the description of three new genera and twelve new species

Patterns of host-parasite associations between marine meiofaunal flatworms (Platyhelminthes) and rhytidocystids (Apicomplexa)

Contact Info

Product

Resources

About