scholarly journals New data on the morphology and phylogenetic connections of Postlepidapedon opisthobifurcatum (Trematoda, Lepocreadioidea: Lepidapedidae), a parasite of Antarctic and sub-Antarctic fishes

2018 ◽  
Vol 55 (2) ◽  
pp. 95-101 ◽  
Author(s):  
S. G. Sokolov ◽  
F. K. Khasanov ◽  
I. I. Gordeev
Keyword(s):  
Seminal Vesicle ◽  
Intestinal Parasite ◽  
Proximal Part ◽  
Molecular Data ◽  
External Seminal Vesicle ◽  
Internal Seminal Vesicle ◽  
Antarctic Fishes ◽  
Glandular Cells ◽  
Thin Walled ◽  
Terminal Genitalia

Summary The trematode Postlepidapedon opisthobifurcatum (Zdzitowiecki, 1990) is a common intestinal parasite of the gadiform fishes of the Southern Ocean. In this work, we supplement the description of the species with the anatomy of the terminal part of the reproductive system and with molecular data. The male terminal genitalia are characterised by the presence of the external seminal vesicle and cirrus-sac. The external seminal vesicle is surrounded by aciniform groups of outer prostatic cells. Groups of outer prostatic cells and proximal parts of their ducts are associated with a thin-walled membrane that is connected to the proximal edge of the cirrus-sac. The cirrus-sac is claviform, with a long proximal part accommodating the tubular, thin-walled internal seminal vesicle and ducts of outer prostatic cells. The female terminal genitalia are represented by a thick-walled metraterm, which is surrounded by aciniform groups of glandular cells. Phylogenetic analysis based on 28S rDNA partial sequences data placed P. opisthobifurcatum into the monophyletic group Lepidapedidae, including the species Myzoxenus insolens (Crowcroft, 1945), Intusatrium robustum Durio et Manter, 1968, and Postlepidapedon uberis Bray, Cribb et Barker, 1997. However, we were unable to detect direct phylogenetic connections between P. opisthobifurcatum and P. uberis.

Description of Neolepidapedoides subantarcticus sp. nov. (Digenea, Lepocreadiidae) from sub-Antarctic notothenioid fishes

2011 ◽  
Vol 56 (3) ◽  
Author(s):  
Witold Jeżewski ◽  
Krzysztof Zdzitowiecki ◽  
Zdzisław Laskowski
Keyword(s):  
New Species ◽  
Seminal Vesicle ◽  
The Body ◽  
Tierra Del Fuego ◽  
Intestinal Bifurcation ◽  
External Seminal Vesicle ◽  
Excretory Vesicle ◽  
Beagle Channel ◽  
Terminal Genitalia

AbstractNeolepidapedoides subantarcticus sp. nov. (Digenea, Lepocreadiidae) is reported from the intestine, mainly the jejunum, of fishes in the eastern mouth of the Beagle Channel and in the harbour of Ushuaia in the Beagle Channel (Tierra del Fuego, Argentina) at a depth 7–30 m. The typical host is Patagonotothen longipes, other hosts are P. tessellata, P. brevicauda and Champsocephalus esox. The male terminal genitalia indicates that the new species belongs to the genus Neolepidapedoides (Lepocreadiidae, Lepocreadiinae). The most important taxonomic features are the presence of eye-spots, the spined tegument, the “Opechona-type” cirrus-sac, the external seminal vesicle free in the parenchyma, the gonads arranged in tandem, the vitelline follicles extending from the level of the oesophagus in the forebody to the posterior end of the body and an I-shaped excretory vesicle reaching to the intestinal bifurcation and the absence of a pseudoesophagus. Ten previously described species differ from the N. subantarcticus sp. nov. mainly in the extent of the vitelline fields and length of the excretory vesicle which reaches into forebody.

Xylodon bambusinus and X. xinpingensis spp. nov. (Hymenochaetales) from southern China

Phytotaxa ◽  
2021 ◽  
Vol 511 (3) ◽  
Author(s):  
XIANG MA ◽  
CHANG-LIN ZHAO
Keyword(s):  
New Species ◽  
Bayesian Inference ◽  
Maximum Likelihood ◽  
Growth Habit ◽  
Southern China ◽  
Phylogenetic Analyses ◽  
Molecular Data ◽  
Two New Species ◽  
Thin Walled ◽  
Inference Methods

Two new species, Xylodon bambusinus and X. xinpingensis, are proposed based on morphological and molecular evidences. Both species share the annual growth habit, resupinate basidiomata and monomitic hyphal system with clamped, colorless generative hyphae, smooth, thin-walled basidiospores, but X. bambusinus is characterized by the smooth to tuberculate hymenial surface, presence of capitate and fusiform cystidia, broad ellipsoid basidiospores, while X. xinpingensis by the reticulate hymenophore with cream hymenial surface, and subglobose basidiospores (4.5–6 × 3.5–5 µm). Sequences of ITS and LSU nrRNA gene regions of the studied samples were generated, and phylogenetic analyses were performed with maximum likelihood, maximum parsimony and Bayesian inference methods. The phylogenetic analyses based on molecular data of ITS and ITS+nLSU sequences showed that X. bambusinus was sister to X. subclavatus, while X. xinpingensis grouped with X. astrocystidiatus and X. paradoxus. The nLSU dataset revealed that X. bambusinus grouped with X. asperus and X. brevisetus with lower supports, and that X. xinpingensis grouped with X. astrocystidiatus and X. paradoxus and then with X. rimosissimus without supports. Both morphological and molecular evidences confirmed the placement of two new species in Xylodon. Description and figures from the new species and a key to the known species of Xylodon from China are presented.

Phlebia nigrodontea sp. nov. in Meruliaceae (Polyporales) with a black hymenial surface

Phytotaxa ◽  
2020 ◽  
Vol 458 (3) ◽  
pp. 195-206
Author(s):  
RUO-XIA HUANG ◽  
KAI-YUE LUO ◽  
CHANG-LIN ZHAO
Keyword(s):  
Bayesian Inference ◽  
Maximum Likelihood ◽  
Phylogenetic Analyses ◽  
Strong Support ◽  
Molecular Data ◽  
Molecular Evidence ◽  
Monophyletic Lineage ◽  
Phlebioid Clade ◽  
Thin Walled ◽  
Inference Methods

A new wood-inhabiting fungus, Phlebia nigrodontea, is proposed based on a combination of morphological features and molecular evidence. The species is characterized by a grandinioid hymenophore with vinaceous brown to black colour, a monomitic hyphal system with clamped generative hyphae and ellipsoid, colourless, thin-walled, smooth basidiospores (3.9–4.9 × 2.3–3.1 µm). Sequences of ITS and LSU nrRNA gene regions of the studied samples were generated, and phylogenetic analyses carried out using maximum likelihood, maximum parsimony and Bayesian inference methods. The phylogenetic analyses based on the molecular data of ITS+nLSU sequences showed that P. nigrodontea nested within the phlebioid clade. A further investigation of more representative taxa from Phlebia, based on ITS+nLSU sequences, demonstrated that the species P. nigrodontea formed a monophyletic lineage with strong support (100% BS, 100% BT, 1.00 BPP) and closely grouped with P. chrysocreas.

A NEW CARYOPHYLLID CESTODE PSEUDOLYTOCESTUS JAGDISHII N.SP. FROM HETEROPNEUSTES FOSSILIS

2019 ◽  
Vol 25 (1) ◽  
Author(s):  
ALOK PATHAK ◽  
A.K. SRIVASTAV
Keyword(s):  
Seminal Vesicle ◽  
Fresh Water ◽  
Morphological Study ◽  
Uttar Pradesh ◽  
Present Species ◽  
Heteropneustes Fossilis ◽  
Short Neck ◽  
Internal Seminal Vesicle

A new cestode, Pseudolytocestus jagdishii n.sp. is described here from the intestine of fresh water catfishes, Heteropneustes fossilis at Muhana, District Jalaun, Uttar Pradesh, India. After morphological study of worm we reach on the conclusion that present species differs from all known species of genus Pseudolytocestus in the presence of larger worms, short neck, internal seminal vesicle, larger ovary lobes with equal wings and other characters.

Heteroradulum yunnanensis sp. nov. (Auriculariales, Basidiomycota) evidenced by morphological characters and phylogenetic analyses in China

Phytotaxa ◽  
2020 ◽  
Vol 437 (2) ◽  
pp. 51-59
Author(s):  
QIAN-XIN GUAN ◽  
CHAO-MAO LIU ◽  
TANG-JIE ZHAO ◽  
CHANG-LIN ZHAO
Keyword(s):  
Growth Habit ◽  
Phylogenetic Analyses ◽  
Strong Support ◽  
Morphological Characters ◽  
Molecular Data ◽  
Fungal Species ◽  
Molecular Evidence ◽  
Monophyletic Lineage ◽  
Thin Walled ◽  
Inference Methods

A new wood-inhabiting fungal species, Heteroradulum yunnanensis, is proposed based on a combination of morphological features and molecular evidence. The species is characterized by an annual growth habit, resupinate basidiomata with odontoid hymenial surface (50–100 µm long), more or less pronounced yellow stains in older basidiomata, a monomitic hyphal system with thin-walled, clamped generative hyphae and two to three-celled basidia and cylindrical, hyaline, thin-walled, smooth, IKI–, CB– basidiospores measuring as 17–24 ×5–8 µm. Sequences of ITS and LSU nrRNA gene regions of the studied samples were generated, and phylogenetic analyses were performed with maximum likelihood, maximum parsimony and bayesian inference methods. The phylogenetic analyses based on molecular data of ITS+nLSU sequences showed that Heteroradulum yunnanensis formed a monophyletic lineage with a strong support (100% BS, 100% BP, 1.00 BPP) and then grouped with H. adnatum.

Phlebia ailaoshanensis sp. nov. (Polyporales, Basidiomycota) evidenced by morphological characters and phylogenetic analyses

Phytotaxa ◽  
2018 ◽  
Vol 373 (3) ◽  
pp. 184 ◽  
Author(s):  
SHAN SHEN ◽  
XIANG MA ◽  
TAI-MIN XU ◽  
CHANG-LIN ZHAO
Keyword(s):  
Growth Habit ◽  
Phylogenetic Analyses ◽  
Strong Support ◽  
Morphological Characters ◽  
Molecular Data ◽  
Molecular Evidence ◽  
Monophyletic Lineage ◽  
Phlebioid Clade ◽  
Thin Walled ◽  
Inference Methods

A new wood-inhabiting fungus, Phlebia ailaoshanensis, is proposed based on a combination of morphological features and molecular evidence. The species is characterized by an annual growth habit, resupinate basidiocarps with tuberculate to phlebioid hymenial surface, a monomitic hyphal system with slightly thick-walled generative hyphae bearing simple septa, IKI–, CB– and ellipsoid, hyaline, thin-walled, smooth, IKI–, CB– basidiospores measuring as 5.7–8.5 × 3–4.3 µm. Sequences of ITS and LSU nrRNA gene regions of the studied samples were generated, and phylogenetic analyses were performed with maximum likelihood, maximum parsimony and bayesian inference methods. The phylogenetic analyses based on molecular data of ITS+nLSU sequences showed that P. ailaoshanensis belonged to the Meruliaceae and nested into the phlebioid clade. Further investigation was obtained for more representative taxa in the Phlebia based on ITS+nLSU sequences, in which the result demonstrated that the species P. ailaoshanensis formed a monophyletic lineage with a strong support (100% BS, 100% BP, 1.00 BPP) and then grouped with P. acanthocystis, P. chrysocreas, P. ludoviciana, P. subcretacea and P. uda.

scholarly journals Steccherinum tenuissimum and S. xanthum spp. nov. (Polyporales, Basidiomycota): New species from China

PLoS ONE ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. e0244520
Author(s):  
Ya-Xing Wu ◽  
Jian-Rong Wu ◽  
Chang-Lin Zhao
Keyword(s):  
New Species ◽  
Growth Habit ◽  
Phylogenetic Analyses ◽  
Molecular Data ◽  
Fungal Species ◽  
Molecular Evidence ◽  
Hyphal System ◽  
Thin Walled ◽  
Inference Methods ◽  
High Support

Two new wood-inhabiting fungal species, Steccherinum tenuissimum and S. xanthum spp. nov. are described based on a combination of morphological features and molecular evidence. Steccherinum tenuissimum is characterized by an annual growth habit, resupinate basidiomata with an odontioid hymenial surface, a dimitic hyphal system with clamped generative hyphae, strongly encrusted cystidia and basidiospores measuring 3–5 × 2–3.5 μm. Steccherinum xanthum is characterized by odontioid basidiomata and a monomitic hyphal system with generative hyphae bearing clamp connections and covering by crystals, colourless, thin-walled, smooth, IKI–, CB–and has basidiospores measuring 2.7–5.5 × 1.8–4.0 μm. Sequences of the ITS and nLSU nrRNA gene regions of the studied samples were generated, and phylogenetic analyses were performed with maximum likelihood, maximum parsimony and Bayesian inference methods. The phylogenetic analyses based on molecular data of ITS + nLSU sequences showed that two new Steccherinum species felled into the residual polyporoid clade. Further investigation was obtained for more representative taxa in Steccherinum based on ITS + nLSU sequences, which demonstrated that S. tenuissimum and S. xanthum were sister to S. robustius with high support (100% BP, 100% BS and 1.00 BPP).

scholarly journals Phylogenetic position of trematode Amurotrema dombrowskajae Achmerow, 1959 (Paramphistomoidea: Cladorchiidae) based on partial 28S rDNA nucleotide sequences

2016 ◽  
Vol 53 (2) ◽  
pp. 161-164 ◽  
Author(s):  
S. G. Sokolov ◽  
D. I. Lebedeva ◽  
A. P. Kalmykov
Keyword(s):  
Bayesian Inference ◽  
Intestinal Parasite ◽  
Molecular Data ◽  
Nucleotide Sequences ◽  
28S Rdna ◽  
Ctenopharyngodon Idella ◽  
Phylogenetic Position ◽  
Volga River ◽  
Volga River Delta ◽  
The Family

SummaryThe trematode Amurotrema dombrowskajae Achmerow, 1959, is the type and the only species of the paramphistomoid genus Amurotrema Achmerow, 1959. This intestinal parasite of grass carp (Ctenopharyngodon idella) was introduced with host to the Volga River Delta. These naturalized trematodes were found by the authors in 2014 – 2015. In the present study the phylogenetic position of Amurotrema dombrowskajae is analysed using partial 28S rDNA nucleotide sequences. Bayesian inference and Maximum Likelihood analyses place this species in a clade with representatives of the family Cladorchiidae - Megalodiscus temperatus (Stafford, 1905) and Indosolenorchis hirudinaceus Crusz, 1951. Thus, molecular data are consistent with the traditional view on the position of A. dombrowskajae in this family.

Ultrastructure of the male reproductive system of the free-living marine nematode Paracyatholaimus pugettensis Wieser & Hopper, 1967 (Chromadorida: Cyatholaimidae)

Nematology ◽  
2010 ◽  
Vol 12 (2) ◽  
pp. 255-268 ◽  
Author(s):  
Julia K. Zograf
Keyword(s):  
Epithelial Cells ◽  
Seminal Vesicle ◽  
Reproductive System ◽  
Vas Deferens ◽  
Proximal Part ◽  
Male Reproductive System ◽  
Synthetic Activity ◽  
The Sea Of Japan ◽  
Marine Nematode ◽  
Free Living

AbstractAlthough nematodes are a well studied group of multicellular organisms, until now the only information on the cellular structure of the male reproductive system of marine nematodes is that on the histology of free-living marine nematode from the order Enoplida. The fine structure of the male reproductive system of the free-living marine nematode Paracyatholaimus pugettensis (Chromadorida: Cyatholaimidae) from the Sea of Japan has been studied using TEM. The testis epithelium has a large distal tip cell similar to that described for representatives of the subclass Rhabditia. The epithelial wall of the testis is differentiated along its length. The proximal part of the epithelial tube consists of relatively large cells bearing numerous surface outgrowths that permeate between the developing spermatocytes. The epithelium in the middle region of the testis is formed from extremely flattened cells. The distal part of the testis – the seminal vesicle – is filled with immature spermatozoa and consists of absorptive cells. The seminal vesicle is followed by the vas deferens. The gonoduct is also differentiated along its length, the first third being formed from synthetically active epithelial cells, the two layers of which form a tiled structure. There is no lumen in the gonoduct and it is probable that, due to the tiled structure, the epithelial cells move apart to create space for the spermatozoa during ejaculation. The posterior two-thirds of the duct is surrounded by muscle cells that create the necessary pressure during ejaculation. The enlarged epithelial cells of the vas deferens show vigorous synthetic activity, which is probably involved in the transformation of immature spermatozoa into mature gametes.

Luteoporia albomarginata gen. et sp. nov. (Meruliaceae, Basidiomycota) from tropical China

Phytotaxa ◽  
2016 ◽  
Vol 263 (1) ◽  
pp. 31 ◽  
Author(s):  
FANG WU ◽  
YUAN YUAN ◽  
JIA-JIA CHEN ◽  
SHUANG-HUI HE
Keyword(s):  
Related Species ◽  
New Genus ◽  
Growth Habit ◽  
Morphological Characters ◽  
Molecular Data ◽  
Annual Growth ◽  
Hyphal System ◽  
Rdna Sequences ◽  
Thin Walled ◽  
Tropical China

Luteoporia is proposed as a new genus in Polyporales based on morphological characters and molecular data. The genus is typified by L. albomarginata sp. nov. which is characterized by an annual growth habit, resupinate basidiocarps with yellow pores, a monomitic hyphal system with clamp connections, tramal hyphae with swollen tips projecting out of hymenium, and hyaline, thin-walled, oblong-ellipsoid basidiospores. Phylogeny of L. albomarginata and its related species was inferred from ITS and nLSU rDNA sequences, and the genus belongs to the Meruliaceae.

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