Aborjinia corallicola sp. n., a new nematode species (Nematoda: Marimermithidae) associated with the bamboo coral Acanella arbuscula (Johnson)

AbstractA new species of Aborjinia Özdikmen, 2010 is described from the tissues of the cold-water bamboo coral Acanella arbuscula (Johnson) from the northwest Atlantic. Aborjinia corallicolasp. n. is characterized by 18.4–33.2 mm long body in adults; outer labial and cephalic sensilla papilliform and located 14–21 µm from anterior end, amphideal aperture located 22–41 µm from anterior end, excretory pore indistinct, rectum and anal opening functional, convex-conoid tail with broadly rounded terminus, spinneret subventral. It is placed in the genus Aborjinia based on the combination of the following characters: outer labial and cephalic sensilla papilliform in shape and located in one circle, contrary to Marimermis Rutsov & Platonova, 1974 (outer labial and cephalic sensilla setiform) and Ananus Rubtsov, 1977 and Thalassonema Ward, 1933 (outer labial and cephalic sensilla in separate circles, if known). From Aborjinia eulagiscae Tchesunov & Spiridonov, 1985 the new species differs in much shorter body, much shorter tail, presence of caudal glands and spinneret in adults, different host species. Our finding represents the first report of a nematode in a parasitic relationship with a cold-water octocoral. Phylogenetic relationships between Aborjinia and other nematodes are analyzed based on 18S rDNA sequences. Summary of all presently known species and genera of the family Marimermithidae is also given.

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Unexplored diversity of microscopic myxomycetes: evidence from environmental DNA

Plant Ecology and Evolution ◽

10.5091/plecevo.2019.1621 ◽

2019 ◽

Vol 152 (3) ◽

pp. 499-506 ◽

Cited By ~ 2

Author(s):

Oleg N. Shchepin ◽

Martin Schnittler ◽

Nikki H.A. Dagamac ◽

Dmitry V. Leontyev ◽

Yuri K. Novozhilov

Keyword(s):

New Species ◽

18S Rdna ◽

Sequence Similarity ◽

Phylogenetic Analyses ◽

Environmental Dna ◽

Full Length ◽

Detection Techniques ◽

Rdna Sequences ◽

18S Rdna Sequences ◽

Environmental Sequences

Background and aims – Recent studies showed the position of two slime mould species with microscopic sporocarps, Echinosteliopsis oligospora and Echinostelium bisporum, within the class Myxomycetes. These minute species are seldom seen in studies based on detection of sporocarps and can easily be confused with protosteloid amoebozoans.Methods – We searched all published ePCR data sets that targeted myxomycete 18S rDNA for the presence of environmental sequences similar to E. oligospora and Echinosteliales in traditional circumscription, and performed phylogenetic analyses that included short environmental sequences and full-length 18S rDNA sequences representing all the major groups of myxomycetes.Key results – We report 19 unique sequences which are closely related to E. bisporum or E. oligospora based on sequence similarity (73.1–95.2% similarity) and which form well-supported monophyletic clades with these species in phylogenetic analyses. They may represent new species that are not yet described. Our phylogeny based on full-length 18S rDNA sequences further confirms the position of E. bisporum and E. oligospora within myxomycetes and the paraphyly of the order Echinosteliales in its traditional circumscription.Conclusions – Our results show that ePCR-based studies can reveal myxomycete taxa that often escape detection by traditional approaches, including potentially new species, and thus provide valuable new data on diversity and ecology of myxomycetes. As such, strategies for studying myxomycetes biodiversity should be revised, focusing also on molecular detection techniques in addition to the sporocarp-based ones.

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Mites of the family Syringophilidae (Acariformes: Cheyletoidea) parasitizing waxbills of the genus Estrilda (Passeriformes: Estrildidae)

Systematic and Applied Acarology ◽

10.11158/saa.24.9.15 ◽

2019 ◽

Vol 24 (9) ◽

pp. 1799-1808

Author(s):

Maciej Skoracki ◽

Martin Hromada ◽

Petra Prevuznakova ◽

Wanyoike Wamiti

Keyword(s):

New Species ◽

Host Species ◽

New Host ◽

Quill Mites ◽

The Family ◽

Sub Saharan ◽

First Time ◽

A New Species ◽

New Host Species

Quill mites (Acariformes: Prostigmata: Syringophilidae) parasitizing waxbills of genus Estrilda Swainson (Aves: Passeriformes: Estrildidae) from the Sub-Saharan region are studied for the first time. Among them, a new species, Syringophiloidus estrildus sp. nov., is described and new host species for Neosyringophilopsis lonchurus Skoracki, 2008, Neoaulonastus oryzivorus (Skoracki, 2011) comb. nov., and Picobia lonchurae Skoracki et al., 2016 are recorded. In our study, we examined 120 specimens belonging to seven of the 16 (44%) species of the genus Estrilda. The prevalence of infestation by syringophilid species varied from 3.7 to 25%. The host and habitat (feather type) specificity are discussed.

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Monophyly of the family Desmoscolecidae (Nematoda, Demoscolecida) and Its Phylogenetic position inferred from 18S rDNA sequences

Molecules and Cells ◽

10.1007/s10059-009-0070-7 ◽

2009 ◽

Vol 27 (5) ◽

pp. 515-523 ◽

Cited By ~ 1

Author(s):

Ui Wook Hwang ◽

Eun Hwa Choi ◽

Dong Sung Kim ◽

Wilfrida Decraemer ◽

Cheon Young Chang

Keyword(s):

18S Rdna ◽

Phylogenetic Position ◽

Rdna Sequences ◽

The Family ◽

18S Rdna Sequences

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Taxonomic characterization of ten Thraustochytrids strains isolated from mangrove Xuan Thuy, Nam Dinh

Vietnam Journal of Biotechnology ◽

10.15625/1811-4989/14/2/9364 ◽

2016 ◽

Vol 14 (2) ◽

pp. 377-384

Author(s):

Nguyễn Thị Hoài Hà ◽

Phạm Thị Bích Đào ◽

Nguyễn Đình Tuấn

Keyword(s):

Cell Division ◽

18S Rdna ◽

Rdna Sequences ◽

Marine Habitats ◽

The Family ◽

Molecular Phylogenetic ◽

Binary Division ◽

18S Rdna Sequences ◽

Amoeboid Cells

Thraustochytrids have become of considerable industrial and scientific interest in the past decade due to their health benefits. Thraustochytrids are found in a wide variety of marine habitats such as the coastal, mangrove and sediments including the deep sea. Thraustochytrids are extremely common on the detritus, macroalgae and decaying leaf, they play an important role as organic matter-degrading microorganisms Thraustochytrids are unicellular, eukaryotic, chemo-organotrophic organisms. Ten thraustochytrids strains PT269, PT270, PT273, PT274, PT279, PT284, PT285, PT287, PT81, PT84 were isolated from four locations in Xuan Thuy mangroves, Nam Dinh. In this report, classification is based on morphology and 18S rDNA sequences. Ten Thraustochytrid strains could be classified into three types of colony and four types of cell morphology. Molecular phylogenetic analysis of 18S rDNA sequences showed homology score to be 99-100% and these strains belonged to four genera in the family Thraustochytriaceae. PT269, PT279, PT284 and PT287 strains belong to Aurantiochytrium genus, they produce amoeboid cells and occur successive binary division. PT273 and PT285 strains belong to Thraustochytrium genus, thallus directly develop and cleave into sporangium. PT274 strain belong to Aplanochytrium genus with two distinct development, amoeboid cells are found, they rapidly round up and become sporangium; and successive binary cell division. PT270, PT81 and PT84 strains belong to genus Schizochytrium, they have successive binary cell division, zoospores release.

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Taxonomy and SSU rDNA-Based Phylogeny of Two Heterotrich Ciliates (Ciliophora, Heterotrichea) Collected From Subtropical Wetlands of China, Including the Description of a New Species, Linostomella pseudovorticella n. sp.

Frontiers in Microbiology ◽

10.3389/fmicb.2021.719360 ◽

2021 ◽

Vol 12 ◽

Author(s):

Didi Jin ◽

Xuetong Zhao ◽

Tingting Ye ◽

Jie Huang ◽

Alan Warren ◽

...

Keyword(s):

New Species ◽

Food Web ◽

Phylogenetic Analyses ◽

Small Subunit ◽

Ssu Rdna ◽

Microbial Food Web ◽

Model Organisms ◽

Rdna Sequences ◽

The Family ◽

A New Species

The Heterotrichea Stein, 1859 are a group of ciliated protists (single-celled eukaryotes) that occur in a wide variety of aquatic habitat where they play important roles in the flow of nutrients and energy within the microbial food web. Many species are model organisms for research in cytology and regenerative biology. In the present study, the morphology and phylogeny of two heterotrich ciliates, namely, Linostomella pseudovorticella n. sp. and Peritromus kahli Villeneuve-Brachon, 1940, collected from subtropical wetlands of China, were investigated using morphological and molecular methods. L. pseudovorticella n. sp. differs from its only known congener, Linostomella vorticella Ehrenberg, 1833 Aescht in Foissner et al., 1999, by having more ciliary rows (48–67, mean about 56 vs. 26–51, mean about 42) and its small-subunit (SSU) rDNA sequence, which shows a 15-bp divergence. Although P. kahli has been reported several times in recent decades, its infraciliature has yet to be described. A redescription and improved diagnosis of this species based on a combination of previous and present data are here supplied. Phylogenetic analyses based on SSU rDNA sequences revealed that the genus Linostomella is positioned within Condylostomatidae, and Peritromidae is sister to Climacostomidae with relatively low support, and the family Spirostomidae is the root branch of the class Heterotrichea.

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Description of a new marine predatory nematode Latronema dyngi sp. nov. (Nematoda, Chromadorida, Selachinematidae) from the west coast of Sweden and an updated phylogeny of Chromadoria

Marine Biodiversity ◽

10.1007/s12526-020-01129-w ◽

2020 ◽

Vol 50 (6) ◽

Author(s):

Mohammed Ahmed ◽

Oleksandr Holovachov

Keyword(s):

Phylogenetic Analysis ◽

Maximum Likelihood ◽

West Coast ◽

18S Rdna ◽

Nematode Species ◽

The West ◽

Spicule Length ◽

Rdna Sequences ◽

18S Rdna Sequences ◽

Circular Outline

AbstractA new nematode species, Latronema dyngi sp. nov., is described from Skagerrak off the west coast of Sweden with the type locality near Dyngö island. Latronema dyngi sp. nov. is characterized by multispiral amphideal fovea with circular outline, 0.2–0.3 corresponding body diameters wide in males and 0.1–0.2 corresponding body diameters wide in females, 12 cuticular longitudinal ridges and 18–27 precloacal supplements in males. Latronema dyngi sp. nov. most closely resembles L. orcinum in terms of body length; demanian ratios a, b, c and c′; number of amphid turns in males; and the ratio of spicule length to cloacal body diameter. The two species can be differentiated by the number longitudinal ridges on the cuticle (12 for Latronema dyngi sp. nov. vs 20–22 for L. orcinum) and spicule length (65–78 μm for L. dyngi vs 60 for L. orcinum) and shape (weakly arcuate for L. dyngi sp. nov. vs strongly arcuate for L. orcinum). We also performed a maximum likelihood phylogenetic analysis on over 250 nematodes of the subclass Chromadoria based on their nearly full-length 18S rDNA sequences. In agreement with previous studies, our analysis supported Selachinematidae as a monophyletic group and placed Richtersia Steiner, 1916 within Desmodoridae Filipjev, 1922 or just outside of the main Desmodorida clade with the latter placement not well supported.

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Mycosphaerellaceous fungi and new species of Venustosynnema and Zasmidium on ferns and fern allies in Taiwan

Phytotaxa ◽

10.11646/phytotaxa.176.1.29 ◽

2014 ◽

Vol 176 (1) ◽

pp. 309 ◽

Cited By ~ 6

Author(s):

Roland Kirschner ◽

Li-Chia Liu

Keyword(s):

New Species ◽

Dna Sequences ◽

Host Species ◽

New Records ◽

Its Rdna ◽

The Other ◽

Rdna Sequences ◽

Dicranopteris Linearis ◽

A New Species

Selected fungi on ferns in Taiwan are described, illustrated, annotated and complemented with first DNA sequences. The ranges of distribution, host species, morphology, and the taxonomy of some species were revised. ITS rDNA sequences proved to be useful for distinguishing between species on the same host. A new species of Venustosynnema found on dead leaves of Selaginella moellendorfii differs from the other species of the genus by its small conidiomata with smooth central seta and reniform conidia. A new species of Zasmidium described on living fronds of Dicranopteris linearis is particular by its hyaline, smooth conidia. New data are derived from new collections of Pseudocercospora athyrii, Ps. cyatheae, and Ps. pteridophytophila hitherto only known from the type collections and of Mycosphaerella gleicheniae. Ps. christellae is considered a synonym of Ps. pteridophytophila. M. gleicheniae and Ps. cyatheae are new records for Taiwan.

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Molecular Phylogeny of the Family Ophryscolecidae (Ciliophora, Litostomatea) Inferred from 18S rDNA Sequences

Journal of Eukaryotic Microbiology ◽

10.1111/jeu.12211 ◽

2015 ◽

Vol 62 (5) ◽

pp. 584-590 ◽

Cited By ~ 3

Author(s):

Mariana F. Rossi ◽

Roberto Júnio. P. Dias ◽

Marcus V. X. Senra ◽

Isabel Martinele ◽

Carlos A. G. Soares ◽

...

Keyword(s):

Molecular Phylogeny ◽

18S Rdna ◽

Rdna Sequences ◽

The Family ◽

18S Rdna Sequences

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A new species of Trichostrongylus (Nematoda, Trichostronglyoidea) parasitizing the subterranean rodent Ctenomys talarum (Rodentia, Octodontidae) from Mar de Cobo, Argentina

Acta Parasitologica ◽

10.2478/s11686-006-0043-3 ◽

2006 ◽

Vol 51 (4) ◽

Cited By ~ 3

Author(s):

María Rossin ◽

Juan Timi ◽

Ana Malizia

Keyword(s):

New Species ◽

Sus Scrofa ◽

Present Finding ◽

Nematode Species ◽

First Record ◽

Subterranean Rodent ◽

Ctenomys Talarum ◽

The Family ◽

A New Species ◽

Male Genital

AbstractA new nematode species, Trichostrongylus duretteae sp. nov., found in the small intestine of Ctenomys talarum from Argentina is described. The new species more closely resembles T. suis lwanitsky, 1930 a parasite of Sus scrofa in the USSR. However, the new species can be distinguished by the morphology of male genital bursa: Rays 6 distant from rays 8 and a larger dorsal ray in relation to the length of rays 2 to 8. The present finding is the first record of the genus Trichostronglyus in rodents of the family Octodontidae.

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