scholarly journals Sigmolenchus sinuosus n. gen., n. sp. (Tylenchidae: Ecphyadophorinae), a new member of the family

Nematology ◽  
2020 ◽  
Vol 22 (9) ◽  
pp. 985-997
Author(s):  
Azadeh Gharahkhani ◽  
Ebrahim Pourjam ◽  
Joaquín Abolafia ◽  
Pablo Castillo ◽  
Majid Pedram
Keyword(s):  
New Genus ◽  
Phylogenetic Analyses ◽  
Cephalic Region ◽  
Slender Body ◽  
Mangrove Forests ◽  
Electron Microscopic ◽  
Sister Relationship ◽  
Lateral Field ◽  
Muddy Sediments ◽  
Amphidial Fovea

Summary Sigmolenchus n. gen., is proposed as a new member of the Tylenchidae. The new genus is proposed based upon light and scanning electron microscopic (LM and SEM) observations and phylogenetic analyses based upon small, large and internal transcribed spacer sequences of ribosomal DNA (SSU, LSU D2-D3, ITS rDNA) and mitochondrial cytochrome c oxidase I gene (COI mtDNA) sequences. It is characterised partly by its slender body, but mainly by having a dorso-ventrally flattened, smooth and elevated cephalic region, unique elongate sinuous amphidial openings, each appearing as a wavy slit with three peaks, originating from the vicinity of the labial plate, extending posteriorly and reaching and passing the first body annulus, and a spacious amphidial fovea. It has an anteriorly rounded outline under LM, knobbed stylet, its conus comprising about one-third of the total length, lateral field with a single band, metacorpus with a distinct valve, vulva with small lateral flaps, and males common with tylenchoidiform spicules. The new genus is morphologically compared with seven tylenchid genera, viz., Chilenchus, Ecphyadophoroides, Filenchus, Labrys, Lelenchus, Sakia, and Tenunemellus, mainly by having small slender body and dorso-ventrally flat cephalic region, and is placed under the subfamily Ecphyadophorinae because of its slender body, elevated smooth cephalic region, long amphidial openings and spacious amphidial fovea. It was recovered from marine muddy sediments taken 2 m deep in mangrove forests off southern Iran. Currently S. sinuosus n. gen., n. sp. is monotypic. In SSU phylogeny, the new genus formed an unsupported sister relationship with Filenchus discrepans, and in LSU phylogeny it occupied a placement inside a major clade including several Tylenchinae genera.

Labrys khuzestanensis n. sp. (Nematoda, Tylenchidae), a new member of the genus with large labial plate

Zootaxa ◽  
2019 ◽  
Vol 4671 (2) ◽  
pp. 267-276 ◽  
Author(s):  
YOUSEF PANAHANDEH ◽  
EBRAHIM POURJAM ◽  
JOAQUÍN ABOLAFIA ◽  
ALI ROSHAN-BAKHSH ◽  
SHIDEH MOJERLOU ◽  
...  
Keyword(s):  
New Species ◽  
Phylogenetic Analyses ◽  
Molecular Data ◽  
Lateral View ◽  
Cephalic Region ◽  
Palm Tree ◽  
Electron Microscopic ◽  
Sem Images ◽  
Lateral Field ◽  
Southwestern Iran

Labrys khuzestanensis n. sp. was recovered from the rhizosphere of a palm tree in southwestern Iran and described using morphological and molecular data. The new species was characterized by combination of the following features: its 590–675 μm long body, finely annulated cuticle in light microscopy (LM), lateral field with two smooth incisures, cephalic region dorso-ventrally flattened with protuberant, elongate and laterally extended labial plate, appearing a V-shaped piece in lateral view, amphidial openings as longitudinal slits confined to labial plate in scanning electron microscopic (SEM) images, stylet 7.5–9.0 μm long, elongated fusiform median bulb with faint valvular apparatus, excretory pore wide with moderately sclerotized duct and elongate filiform tail with finely rounded tip. Compared to four currently known species under the genus, the new species has a remarkably larger and more prominent labial plate as revealed by SEM and trapezoid cephalic region under LM. The molecular phylogenetic analyses of the new species using partial SSU rDNA revealed it has close affinity with three species of Labrys (L. chinensis, L. fuzhouensis and L. filiformis) in Bayesian inference (BI) and maximum likelihood (ML) methods and occupied a placement inside their clade. L. fujianensis, the other species of the genus, occupied a distant placement to the aforementioned clade. This is the second species of Labrys being originally described from Iran, representing the third species of Labrys occurring in the country. 

Morphological and molecular characterisation of Paralongidorus francolambertii sp. n. (Nematoda: Longidoridae) from Serbia

Nematology ◽  
2017 ◽  
Vol 19 (6) ◽  
pp. 681-695 ◽  
Author(s):  
László Barsi ◽  
Francesca De Luca
Keyword(s):  
Phylogenetic Analyses ◽  
The Body ◽  
Likelihood Method ◽  
Rrna Gene ◽  
28S Rrna ◽  
Sister Relationship ◽  
Large Size ◽  
Tilia Tomentosa ◽  
Amphidial Fovea ◽  
Cuticular Layer

Paralongidorus francolambertii sp. n., a bisexual species found in the rhizosphere of silver lime (Tilia tomentosa) and common juniper (Juniperus communis), is described. The species is characterised by its medium to large size (L = 5.86-8.29 mm) and slender body (a = 143-197), a lip region flattened with rounded profile, clearly offset from the body by a deep constriction, a narrow neck between the head and body, a shoulder-like body posterior to the neck, a stirrup-shaped amphidial fovea, with conspicuous slit-like aperture, lying on the lateral cuticular collar, a moderately long odontostyle ca 140 μm long, a guide ring located at ca 28 μm from anterior end, a tail terminus with thickened outer cuticular layer in both sexes, and males with spicules ca 52 μm long. The D2-D3 expansion domains of the 28S rRNA gene and the ITS-containing region of P. francolambertii sp. n. were amplified and sequenced. Phylogenetic analyses by using the Maximum Likelihood method showed that P. francolambertii sp. n. had a sister relationship with P. rex and that all Paralongidorus species formed a well-supported group.

Phylogeny and redescription of Laimaphelenchus pannocaudus Massey, 1966 (Rhabditida: Aphelenchoididae) intercepted from Canadian Picea glauca

Nematology ◽  
2020 ◽  
Vol 22 (2) ◽  
pp. 199-212
Author(s):  
Yiwu Fang ◽  
Munawar Maria ◽  
Alcides Sánchez-Monge ◽  
Jianfeng Gu
Keyword(s):  
Electron Microscopy ◽  
Picea Glauca ◽  
Phylogenetic Analyses ◽  
Nerve Ring ◽  
The Body ◽  
Sister Relationship ◽  
Lateral Field ◽  
Female Tail ◽  
Partial 18S ◽  
Scanning Electron

Summary Laimaphelenchus pannocaudus, isolated in Ningbo port from Picea gluaca, is redescribed based upon characteristic morphological details elucidated by light and scanning electron microscopy photographs. The recovered population is characterised by 907 (771-1024) μm long females with 11.2 (8.9-12.2) μm long stylet, four incisures in the lateral field, excretory pore located at the same level as, or slightly anterior to the nerve ring, vulva lacking a flap and located at 68.7 (63.9-73.4)% of the body, elongate post-vulval uterine sac 78.5 (55.6-101.1) μm long, and tail 40.6 (33.4-45.6) μm long. Males are common and characterised by 16.5 (15.7-17.8) μm long spicules (chord) with their condylus slightly recurved, squared to rounded in shape with a blunt rounded tip and rostrum triangular with a bluntly pointed tip, and six visible caudal papillae. The female tail is ventrally curved, conoid and bears a stalk-like terminus with 4-8 pedunculate projections. Phylogenetic analyses using partial 18S and 28S rDNA D2-D3 data revealed that L. pannocaudus formed a sister relationship with L. suberensis in both phylogenies.

Four new genera of Schizopteridae (Hemiptera: Heteroptera) from the Afrotropical and Neotropical regions

Zootaxa ◽  
2020 ◽  
Vol 4768 (1) ◽  
pp. 95-111 ◽  
Author(s):  
CHRISTIANE WEIRAUCH ◽  
ALEXANDER KNYSHOV ◽  
ROCHELLE HOEY-CHAMBERLAIN
Keyword(s):  
New Genus ◽  
Phylogenetic Analyses ◽  
Wing Venation ◽  
New Genera ◽  
Undescribed Species ◽  
Electron Microscopic ◽  
Male And Female ◽  
Scanning Electron Microscopic ◽  
Trap Sample ◽  
Scanning Electron

Despite a recent surge of taxonomic work on the dipsocoromorphan family Schizopteridae, new genus-level taxa remain to be documented and described. The curation of Malaise and Yellow Pan Trap sample residues from Central and South America and Cameroon resulted in the discovery of five undescribed species that based on combined molecular and morphological phylogenetic analyses represent four phylogenetically isolated lineages within non-hypselosomatine Schizopteridae. To accommodate these new species, we here describe the four new genera Caucanannus gen. n. (Colombia, Ecuador, and Brazil) with Caucanannus perplexus sp. n. and Caucanannus novissimis sp. n.; Kamakonocoris gen. n. (Cameroon) with Kamakonocoris carinata sp. n.; Perittonannus gen. n. (Costa Rica) with Perittonannus antiquus sp. n.; and Rimanannus gen. n. (Cameroon) with Rimanannus camerunensis sp. n. The four genera are characterized by distinctive wing venation and male and female genitalic features. We provide habitus photographs and document morphological details using digital macrophotography as well as light compound microscopic and scanning electron microscopic images. Maps and measurements are also included. 

Vulcanochloris (Trebouxiales, Trebouxiophyceae), a new genus of lichen photobiont from La Palma, Canary Islands, Spain

Phytotaxa ◽  
2015 ◽  
Vol 219 (2) ◽  
pp. 118 ◽  
Author(s):  
Lucie Vančurová ◽  
Ondřej Peksa ◽  
Yvonne Němcová ◽  
Pavel Škaloud
Keyword(s):  
Geographical Distribution ◽  
Canary Islands ◽  
18S Rdna ◽  
New Genus ◽  
Phylogenetic Analyses ◽  
Its Rdna ◽  
Sister Relationship ◽  
La Palma ◽  
Chloroplast Morphology ◽  
Rbcl Sequences

This paper describes a new genus of lichen photobionts, Vulcanochloris, with three newly proposed species, V. canariensis, V. guanchorum and V. symbiotica. These algae have been discovered as photobionts of lichen Stereocaulon vesuvianum growing on slopes of volcanos and lava fields on La Palma, Canary Islands, Spain. Particular species, as well as the newly proposed genus, are delimited based on ITS rDNA, 18S rDNA and rbcL sequences, chloroplast morphology, and ultrastructural features. Phylogenetic analyses infer the genus Vulcanochloris as a member of Trebouxiophycean order Trebouxiales, in a sister relationship with the genus Asterochloris. Our data point to the similar lifestyle and morphology of these two genera; however, Vulcanochloris can be well distinguished by a unique formation of spherical incisions within the pyrenoid. Mycobiont specificity and geographical distribution of the newly proposed genus is further discussed.

Multigene phylogenetic analyses including diverse radiolarian species support the “Retaria” hypothesis — The sister relationship of Radiolaria and Foraminifera

2011 ◽  
Vol 81 (1-2) ◽  
pp. 32-42 ◽  
Author(s):  
Yoshiyuki Ishitani ◽  
Sohta A. Ishikawa ◽  
Yuji Inagaki ◽  
Masashi Tsuchiya ◽  
Kozo Takahashi ◽  
...  
Keyword(s):  
Phylogenetic Analyses ◽  
Sister Relationship ◽  
Relationship Of

Two new species of Paurodontella Husain & Khan, 1968 (Nematoda: Sphaerulariidae) associated with wheat and a diagnostic compendium to the genus

Nematology ◽  
2010 ◽  
Vol 12 (2) ◽  
pp. 181-192 ◽  
Author(s):  
Zafar A. Handoo ◽  
Erum Y. Iqbal ◽  
Nasira Kazi ◽  
Shahina Fayyaz
Keyword(s):  
Triticum Aestivum ◽  
New Species ◽  
Excretory Pore ◽  
Triticum Aestivum L ◽  
Slender Body ◽  
Valid Species ◽  
Lateral Field ◽  
North West ◽  
North West Frontier Province ◽  
Two New Species

Abstract An identification key to ten valid species of Paurodontella is given. A compendium of the most important diagnostic characters with illustrations of each species is included as a practical alternative and supplement to the key. The diagnosis of Paurodontella is emended and a list of all valid species of the genus is given. Two new species (Paurodontella myceliophaga n. sp. and P. balochistanica n. sp.) collected around the roots of wheat (Triticum aestivum L.) from North-West Frontier Province and Balochistan, Pakistan, are described and illustrated. Paurodontella myceliophaga n. sp. is characterised by having a short post-uterine sac, lateral field with four incisures, excretory pore at the base of the pharynx and fusiform median bulb, whereas P. balochistanica n. sp. has a longer and very slender body with posterior vulva, lateral field with four incisures and short mucronate tail. Because these species are limited in distribution, their importance is not known.

Asian Betylobraconinae (Hymenoptera, Braconidae), with description of a new genus and phylogenetic affinities of the tribe Facitorini

2008 ◽  
Vol 39 (2) ◽  
pp. 133-154 ◽  
Author(s):  
Alberto Sáez ◽  
Kaoru Maeto ◽  
Alejandro Zaldivar-Riverón ◽  
Sergey Belokobylskij
Keyword(s):  
New Species ◽  
Type Species ◽  
New Genus ◽  
Phylogenetic Analyses ◽  
28S Rrna ◽  
Asian Region ◽  
Molecular Phylogenetic ◽  
Phylogenetic Affinities ◽  
One New Species ◽  
Rrna Sequences

AbstractThe taxonomy of the Asian genera of the subfamily Betylobraconinae, a small and understudied group within the hymenopteran family Braconidae, is revised. A new genus exclusively from the Asian region, Asiabregma gen. nov., containing three species (A. ryukyuensis sp. nov. (type species, Japan and Malaya), A. makiharai sp. nov. (Japan) and A. sulaensis (van Achterberg), comb. nov. (Indonesia)) is described. One new species of Aulosaphobracon, A. striatus sp. nov. from Vietnam, and one of Facitorus, F. amamioshimus sp. nov. from Japan, are also described. Based on molecular phylogenetic analyses using COI mtDNA and 28S rRNA sequences, the three genera previously placed in the tribe Facitorini, Facitorus, Conobregma and Jannya, together with Asiabregma gen. nov., are transferred to the rogadine tribe Yeliconini.

Crocinoboletus, a new genus of Boletaceae (Boletales) with unusual boletocrocin polyene pigments 

Phytotaxa ◽  
2014 ◽  
Vol 175 (3) ◽  
pp. 133 ◽  
Author(s):  
Nian-Kai Zeng ◽  
Gang Wu ◽  
Yan-Chun Li ◽  
Zhi-Qun Liang ◽  
Zhu-Liang Yang
Keyword(s):  
New Genus ◽  
Phylogenetic Analyses ◽  
Middle Part ◽  
Line Drawings ◽  
Molecular Phylogenetic ◽  
Orange Color

Crocinoboletus is described as a new genus of Boletaceae to accommodate Boletus rufoaureus and B. laetissimus, characterized by its brilliant orange color of basidiomata caused by the presence of unusual boletocrocin polyene pigments, bluish olivaceous staining of all parts when bruised, smooth basidiospores, and the pileipellis which has an interwoven trichoderm at the middle part of the pileus and a cutis at the margin of the pileus. Prior molecular phylogenetic analyses also confirmed the two taxa are not members of the genus Boletus s.s., but form a well-supported generic lineage within Boletaceae. Consequently a description, color photos of fresh basidiomata, line-drawings of microstructures and a comparison of Crocinoboletus with allied taxa are presented.

Affinities of the Boletus chromapes group to Royoungia and the description of two new genera, Harrya and Australopilus

2012 ◽  
Vol 25 (6) ◽  
pp. 418 ◽  
Author(s):  
Roy E. Halling ◽  
Mitchell Nuhn ◽  
Todd Osmundson ◽  
Nigel Fechner ◽  
James M. Trappe ◽  
...  
Keyword(s):  
New Genus ◽  
Phylogenetic Analyses ◽  
Large Subunit ◽  
Elongation Factor ◽  
Sister Group ◽  
Molecular Data ◽  
Translation Elongation ◽  
Spore Deposit ◽  
Large Subunit Rdna ◽  
Translation Elongation Factor 1Α

Harrya is described as a new genus of Boletaceae to accommodate Boletus chromapes, a pink-capped bolete with a finely scabrous stipe adorned with pink scabers, a chrome yellow base and a reddish-brown spore deposit. Phylogenetic analyses of large-subunit rDNA and translation elongation factor 1α confirmed Harrya as a unique generic lineage with two species, one of which is newly described (H. atriceps). Some Chinese taxa were recently placed in a separate genus, Zangia, supported by both morphology and molecular data. Multiple accessions from Queensland, Australia, support the synonymy of at least three species in a separate Australian clade in the new genus, Australopilus. The truffle-like Royoungia is also supported as a separate lineage in this clade of boletes. Even though it lacks stipe characters, it possesses the deep, bright yellow to orange pigments in the peridium. Additional collections from Zambia and Thailand represent independent lineages of uncertain phylogenetic placement in the Chromapes complex, but sampling is insufficient for formal description of new species. Specimens from Java referable to Tylopilus pernanus appear to be a sister group of the Harrya lineage.

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