scholarly journals Intra and inter specific genetic divergence of termites species based on ISSR markers and 28S rDNA sequences

2018 ◽  
Vol 10 (2) ◽  
pp. 52-91
Author(s):  
Puttaraju Harini Ballagere ◽  
Krishnamurthy Pranesh Muduvadi
Keyword(s):  
Genetic Divergence ◽  
Issr Markers ◽  
28S Rdna ◽  
Rdna Sequences ◽  
28S Rdna Sequences

A new species of Auriculostoma (Trematoda: Allocreadiidae) from the intestine of Brycon guatemalensis (Characiformes: Bryconidae) from the Usumacinta River Basin, Mexico, based on morphology and 28S rDNA sequences, with a key to species of the genus

Zootaxa ◽  
2016 ◽  
Vol 4196 (2) ◽  
pp. 261 ◽  
Author(s):  
DAVID IVÁN HERNÁNDEZ-MENA ◽  
CHRISTINA LYNGGAARD ◽  
BERENIT MENDOZA-GARFIAS ◽  
GERARDO PÉREZ-PONCE DE LEÓN
Keyword(s):  
New Species ◽  
Geographical Distribution ◽  
Genetic Divergence ◽  
28S Rdna ◽  
The Other ◽  
Sister Taxon ◽  
Host Association ◽  
Rdna Sequences ◽  
28S Rdna Sequences ◽  
A New Species

We describe a new species of Auriculostoma Scholz, Aguirre-Macedo & Choudhury, 2004 based on several sources of information including morphology (light and scanning electron microscopy [SEM]), sequences of two nuclear genes, host association, and geographical distribution. Morphologically, the new species most closely resembles Auriculostoma astyanace Scholz, Aguirre-Macedo & Choudhury, 2004, but differs by having deeply lobated testes and cirrus-sac extending posteriorly to seminal receptacle level. Auriculostoma lobata n. sp. can be readily distinguished from all the other congeners by the combination of the following characters: testes located in tandem, testes deeply lobated, and larger body size. A phylogenetic analysis using 28S rDNA sequences along with those available for other allocreadiid trematodes, revealed that the new species is a sister taxon of A. astyanace, a species described from the banded astyanax, Astyanax fasciatus (Cuvier) in Nicaragua. Auriculostoma totonacapanensis Razo-Mendivil, Mendoza-Garfias, Pérez-Ponce de León & Rubio-Godoy, 2014 from the Mexican tetra, Astyanax mexicanus (De Filippi) in Mexico is the sister taxon of A. astyanace plus the new species. Genetic divergence levels for the 28S rDNA and ITS2 were estimated among the Middle-American species of Auriculostoma infecting characiforms. The validity of the new species is then established by reliable morphological differences, its host association to bryconids (Brycon guatemalensis Regan), restricted geographical distribution (Usumacinta and Lacantun River basins), and genetic divergence levels, albeit relatively low. A morphometric comparison between the new species and the other seven congeneric species was undertaken and, in addition, a taxonomic key to identify the species contained in the genus Auriculostoma, widely distributed across the Americas, is provided. 

scholarly journals Phylogenetic Positions of the Bothitrematidae and Neocalceostomatidae (Monopisthocotylean Monogeneans) Inferred from 28S rDNA Sequences

2002 ◽  
Vol 69 (1) ◽  
pp. 20-25 ◽  
Author(s):  
Jean-Lou Justine ◽  
Richard Jovelin ◽  
Lassâd Neifar ◽  
Isabelle Mollaret ◽  
L. H Susan Lim ◽  
...  
Keyword(s):  
28S Rdna ◽  
Rdna Sequences ◽  
28S Rdna Sequences

Generic classification of some more hyphomycetes with solitary conidia borne on phialides

1998 ◽  
Vol 76 (9) ◽  
pp. 1570-1583 ◽  
Author(s):  
W Gams ◽  
K O'Donnell ◽  
H -J Schroers ◽  
M Christensen
Keyword(s):  
New Species ◽  
Phylogenetic Analyses ◽  
Large Subunit ◽  
Elongation Factor ◽  
28S Rdna ◽  
New Combination ◽  
Rdna Sequences ◽  
28S Rdna Sequences ◽  
Three New Species ◽  
Morphological Species

Unlike most phialide-producing fungi that liberate a multiplicity of conidia from each conidiogenous cell, only single conidia are formed on phialide-like conidiogenous cells in Aphanocladium, Verticimonosporium, and some species of Sibirina. A group of isolates obtained from soil of native Artemisia tridentata (sagebrush) grassland in Wyoming and from desert soil in Iraq is compared with these genera and classified as a fourth genus, Stanjemonium, honouring Stanley J. Hughes. Phylogenetic analyses of partial nuclear small- (18S) and large-subunit (28S) rDNA sequences indicate that Stanjemonium spp. form a monophyletic group with Emericellopsis. Sequences from the nuclear 18S and 28S rDNA were too conserved to resolve morphological species of Stanjemonium; however, phylogenetic analysis of b-tubulin and translation elongation factor 1a gene exons and introns resolved all species distinguished morphologically. Numerous conidiogenous cells or denticles are scattered along the cells of aerial hyphae in Aphanocladium and Stanjemonium spp., very rapidly collapsing into denticles in the former, somewhat more persistent and leaving broad scars in the latter. In Cladobotryum-Sibirina and Verticimonosporium spp., conidiogenous cells are discrete in terminal and intercalary whorls; phialides of the latter taxon are particularly swollen. The taxonomy of Aphanocladium is not yet resolved. Two species are recognized in Verticimonosporium. Three new species of Stanjemonium are described, and one new combination from Aphanocladium is proposed, along with one new species of Cladobotryum.Key words: Aphanocladium, Cladobotryum, conidiogenesis, hyphomycetes, molecular phylogeny, phialide, Stanjemonium, systematics, Verticimonosporium.

Macrostomum shenda and M. spiriger, two new brackish-water species of Macrostomum (Platyhelminthes: Macrostomorpha) from China

Zootaxa ◽  
2019 ◽  
Vol 4603 (1) ◽  
pp. 105
Author(s):  
FAN XIN ◽  
SI-YU ZHANG ◽  
YONG-SHI SHI ◽  
LEI WANG ◽  
YU ZHANG ◽  
...  
Keyword(s):  
Brackish Water ◽  
Phylogenetic Analyses ◽  
28S Rdna ◽  
Body Region ◽  
Rdna Sequences ◽  
Molecular Phylogenetic ◽  
28S Rdna Sequences ◽  
Pore Opening ◽  
Brackish Water Species ◽  
Water Species

In this study, two new brackish-water species of Macrostomum (M. shenda n. sp. and M. spiriger n. sp.) collected from Shenzhen, China, were described based on morphological, histological, and molecular phylogenetic analyses. Macrostomum shenda n. sp. differs from its congeners in the oblique and non-thickening distal opening of its narrow funnel-shaped stylet. In addition, its sperm have neither bristles nor brush, and are surrounded by an undulating membrane in the mid-body region. In M. spiriger n. sp., the stylet is spirally twisted. Its reproductive apparatus has a seminal bursal pore opening exteriorly. Results of the 18S and 28S rDNA phylogenetic analyses also support the establishments of these two new species. Moreover, the 18S and 28S rDNA sequences of some species within Macrostomum in previous studies have been revised to avoid ambiguity, while Macrostomum dongyuanensis Wang & Sun, 2015 was re-identified as a new record of M. quiritium Kolasa, 1973 from China.

Phylogeny of the Major Lineages of Membracoidea (Insecta: Hemiptera: Cicadomorpha) Based on 28S rDNA Sequences

2001 ◽  
Vol 18 (2) ◽  
pp. 293-305 ◽  
Author(s):  
C.H. Dietrich ◽  
R.A. Rakitov ◽  
J.L. Holmes ◽  
W.C. Black
Keyword(s):  
28S Rdna ◽  
Rdna Sequences ◽  
28S Rdna Sequences

Molecular Phylogeny of Cypridoid Freshwater Ostracods (Crustacea: Ostracoda), Inferred from 18S and 28S rDNA Sequences

2016 ◽  
Vol 33 (2) ◽  
pp. 179 ◽  
Author(s):  
Shimpei F. Hiruta ◽  
Norio Kobayashi ◽  
Toru Katoh ◽  
Hiroshi Kajihara
Keyword(s):  
Molecular Phylogeny ◽  
28S Rdna ◽  
Rdna Sequences ◽  
28S Rdna Sequences ◽  
Freshwater Ostracods

scholarly journals Mexicana rubra sp. nov. and Encotyllabe cf. spari Yamaguti, 1934 (Monogenea) of Orthopristis ruber (Cuvier, 1830) from the Brazilian Coast off Rio de Janeiro

2017 ◽  
Vol 54 (4) ◽  
pp. 336-347
Author(s):  
A. C. A. Camargo ◽  
J. L. Luque ◽  
C. P. Santos
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Rio De Janeiro ◽  
Genetic Data ◽  
28S Rdna ◽  
Brazilian Coast ◽  
Diagnostic Features ◽  
Rdna Sequences ◽  
28S Rdna Sequences ◽  
Partial 18S

Summary Mexicana rubra sp. nov. and Encotyllabe cf. spari are described from the gills of the marine fish Orthopristis ruber (Haemulidae) caught off Rio de Janeiro, Brazil. Morphological, ultrastructural and genetic data are provided. The main diagnostic features of this new species of ectoparasite are a posteriorly bipartite testis, a ventral bar with three deep bowed projections and a dorsal bar with two deep, conspicuous, antero-lateral indentations. Genetic data on Mexicana rubra sp. nov. are based on the ITS1, 5.8S and partial 18S and 28S rDNA. This is the sixth known species of Mexicana Caballero & Bravo-Hollis, 1959, a key to which is also presented. Encotyllabe cf. spari Yamaguti, 1934 is described from the same host, with new ultrastructural data and new partial 18S and 28S rDNA sequences. A phylogenetic analysis based on partial 18S and 28S sequences is undertaken for both species.

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