scholarly journals Endosymbiotic adaptations in three new bacterial species associated with Dictyostelium discoideum: Paraburkholderia agricolaris sp. nov., Paraburkholderia hayleyella sp. nov., and Paraburkholderia bonniea sp. nov

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9151 ◽  
Author(s):  
Debra A. Brock ◽  
Suegene Noh ◽  
Alicia N.M. Hubert ◽  
Tamara S. Haselkorn ◽  
Susanne DiSalvo ◽  
...  
Keyword(s):  
New Species ◽  
Dictyostelium Discoideum ◽  
Bacterial Species ◽  
Optimal Growth ◽  
Phylogenetic Position ◽  
Optimal Growth Temperature ◽  
Eastern Usa ◽  
Three New Species ◽  
Food Bacteria ◽  
Genome Distance

Here we give names to three new species of Paraburkholderia that can remain in symbiosis indefinitely in the spores of a soil dwelling eukaryote, Dictyostelium discoideum. The new species P. agricolaris sp. nov., P. hayleyella sp. nov., and P. bonniea sp. nov. are widespread across the eastern USA and were isolated as internal symbionts of wild-collected D. discoideum. We describe these sp. nov. using several approaches. Evidence that they are each a distinct new species comes from their phylogenetic position, average nucleotide identity, genome-genome distance, carbon usage, reduced length, cooler optimal growth temperature, metabolic tests, and their previously described ability to invade D. discoideum amoebae and form a symbiotic relationship. All three of these new species facilitate the prolonged carriage of food bacteria by D. discoideum, though they themselves are not food. Further studies of the interactions of these three new species with D. discoideum should be fruitful for understanding the ecology and evolution of symbioses.

scholarly journals Endosymbiotic adaptations in three new bacterial species associated with Dictyostelium discoideum: Burkholderia agricolaris sp. nov., Burkholderia hayleyella sp. nov., and Burkholderia bonniea sp. nov

2018 ◽  
Author(s):  
Debra A. Brock ◽  
Alicia N.M. Hubert ◽  
Suegene Noh ◽  
Susanne DiSalvo ◽  
Katherine S. Geist ◽  
...  
Keyword(s):  
New Species ◽  
Dictyostelium Discoideum ◽  
Growth Temperature ◽  
Bacterial Species ◽  
Optimal Growth ◽  
Cell Length ◽  
Phylogenetic Position ◽  
Optimal Growth Temperature ◽  
Eastern Usa

AbstractHere we name three species of Burkholderia that can defeat the mechanisms by which bacteria are normally excluded from the spores of a soil dwelling eukaryote Dictyostelium discoideum, which is predatory on bacteria. They are B. agricolaris sp. nov., B. hayleyella sp. nov., and B. bonniea sp. nov. These new species are widespread across the eastern USA and were isolated as internal symbionts of wild collected D. discoideum. Evidence that they are each a distinct new species comes from their phylogenetic position, carbon usage, reduced cell length, cooler optimal growth temperature, and ability to invade D. discoideum amoebae and remain there for generations.

Three new remarkable amphipod species (Crustacea: Gammaridae) from springs and subterranean waters of Central Asia

Zootaxa ◽  
2018 ◽  
Vol 4444 (4) ◽  
pp. 437 ◽  
Author(s):  
DMITRY SIDOROV ◽  
ZHONGE HOU ◽  
BORIS SKET
Keyword(s):  
New Species ◽  
Central Asia ◽  
Dna Barcode ◽  
Phylogenetic Position ◽  
Amphipod Species ◽  
Small Areas ◽  
Morphological Studies ◽  
The Family ◽  
Three New Species ◽  
Subterranean Waters

Three new species of the family Gammaridae—Gammarus troglomorphus, sp. n., G. parvioculatus, sp. n. from Lebap Province of Turkmenistan and Tadzocrangonyx alaicus, sp. n. from Batken Region of Kyrgyzstan are described and illustrated. Morphological studies of a closely related Turkmenistan population of G. cf. subaequalis-Garlyk, probably conspecific with Gammarus subaequalis Martynov, 1935 was provided. The affinity of new species to concerned taxa is discussed. To define phylogenetic position of mentioned species DNA barcode data are obtained. Gammarus troglomorphus and G. parvioculatus are close neighbors but exceedingly different morphologically. Gammarus troglomorphus is a troglobiont; G. parvioculatus is an eutroglophile, but with exception of slightly smaller eyes, not troglomorph. Both found only within small areas in the extreme East of Turkmenistan. Gammarus cf. subaequalis-Garlyk seems to extend from the same region far into the eastern Kyrgyzstan. 

scholarly journals Indopolystoma n. gen. (Monogenea, Polystomatidae) with the description of three new species and reassignment of eight known Polystoma species from Asian frogs (Anura, Rhacophoridae)

Parasite ◽  
2019 ◽  
Vol 26 ◽  
pp. 67
Author(s):  
Amira Chaabane ◽  
Olivier Verneau ◽  
Louis Du Preez
Keyword(s):  
New Species ◽  
New Genus ◽  
Phylogenetic Analyses ◽  
The Body ◽  
Molecular Dating ◽  
Phylogenetic Position ◽  
Morphological Evidence ◽  
Freshwater Turtles ◽  
Three New Species ◽  
Japan And China

The polystomes (Monogenea, Polystomatidae) radiated across semi-aquatic tetrapods including all three amphibian orders, freshwater turtles and the hippopotamus. Prior to this study, phylogenetic analyses revealed that the most diverse and widespread genus, Polystoma, was not monophyletic; a lineage comprising four undescribed species from the bladder of Zhangixalus spp. (Rhacophoridae) in Asia occupied a deep phylogenetic position. Regarding vicariance biogeography and molecular dating, the origin of this lineage is correlated with the breakup of Gondwanaland in the Mesozoic period. Based on a Bayesian analysis of four concatenated genes (18S, 28S, COI and 12S) and morphological evidence, one new genus, Indopolystoma n. gen., and three new species, sampled in Japan and China, are described here: Indopolystoma viridi n. sp. from Z. viridis of Japan, Indopolystoma elongatum n. sp. from Z. arboreus of Japan, and Indopolystoma parvum n. sp. from Z. omeimontis of China. Indopolystoma is unique amongst polystome genera infecting anurans by possessing a small haptor relative to the body size, posteriormost marginal hooklet C1 much bigger than hooklets C2–C8 with conspicuous broad blade and guard and a pair of hamuli lacking a deep notch. Eight species of Asian Polystoma, all from rhacophorids, are transferred as Indopolystoma carvirostris (Fan, Li & He, 2008) n. comb., I. hakgalense (Crusz & Ching, 1975) n. comb., I. indicum (Diengdoh & Tandon, 1991) n. comb., I. leucomystax (Zhang & Long, 1987) n. comb., I. mutus (Meng, Song & Ding, 2010) n. comb., I. pingbianensis (Fan, Wang & Li, 2004) n. comb., I. rhacophori (Yamaguti, 1936) n. comb., and I. zuoi (Shen, Wang & Fan, 2013) n. comb.

scholarly journals Evolution and palaeoecology of early turtles: a review based on recent discoveries in the Middle Jurassic

2011 ◽  
Vol 182 (3) ◽  
pp. 231-240 ◽  
Author(s):  
Jérémy Anquetin
Keyword(s):  
New Species ◽  
Middle Jurassic ◽  
Morphological Characters ◽  
Early Evolution ◽  
Bone Histology ◽  
Phylogenetic Position ◽  
Crown Group ◽  
Three New Species ◽  
First Time ◽  
Lines Of Evidence

AbstractIn recent years, no less than five new species of early turtles have been described worldwide. Among them are three new turtles from Middle Jurassic deposits that partially fill a previous temporal and morphological gap in our knowledge of the early evolution of these shelled amniotes: Heckerochelys romani, Condorchelys antiqua and Eileanchelys waldmani. For the first time, the phylogenetic position of these three new species is tested in the context of the two presently competing cladistic models of turtle evolution. The addition of these taxa to each matrix does not favour or alter any of the two opposed hypotheses. However, it is demonstrated here that, by documenting yet unknown stages in the evolution of several morphological structures, these three species give stronger support to the model of an extended phylogenetic stem for turtles. These new lines of evidence include the structure of the vomer, the position of the aditus canalis stapedio-temporalis and of the posterior opening of the canalis cavernosus, and the morphology of the processus interfenestralis of the opisthotic.Recent discoveries also reinvigorate the debate about the palaeoecology of early turtles. Whereas simple morphological characters (e.g., shell fontanelle, ligamentous bridge, flattened carapace) can be misleading, forelimb proportions and shell bone histology have led to the conclusion that most stem turtles (i.e., Proganochelys quenstedti, Palaeochersis talampayensis, Proterochersis robusta, Kayentachelys aprix and meiolaniids) were terrestrial forms. At least two out of the five recently described early turtles have been convincingly interpreted as having aquatic habits: Odontochelys semitestacea and Eileanchelys waldmani. More investigation is needed, but this will undoubtedly trigger further debate on the primitive ecology of turtles and on the origin of aquatic habits in testudines (i.e., the crown-group), respectively.

Three new species within the genus Entoloma (Basidiomycota, Agaricales) with clamped basidia and a serrulatum-type lamellae edge, and their phylogenetic position

2017 ◽  
Vol 17 (3) ◽  
pp. 381-392 ◽  
Author(s):  
O. V. Morozova ◽  
M. E. Noordeloos ◽  
E. S. Popov ◽  
A. V. Alexandrova
Keyword(s):  
New Species ◽  
Phylogenetic Position ◽  
Three New Species

scholarly journals Three new species of the genus Aphidius (Hymenoptera, Braconidae, Aphidiinae) from South Korea

2021 ◽  
Vol 86 ◽  
pp. 63-77
Author(s):  
Sangjin Kim ◽  
Željko Tomanović ◽  
Yeonghyeok Yu ◽  
JuHyeong Sohn ◽  
Yunjong Han ◽  
...  
Keyword(s):  
New Species ◽  
Cytochrome C ◽  
South Korea ◽  
Cytochrome C Oxidase ◽  
Dna Barcode ◽  
Biocontrol Agents ◽  
Phylogenetic Position ◽  
Mitochondrial Cytochrome ◽  
Reference Species ◽  
Three New Species

Several species of the genus Aphidius are well known as commercial biocontrol agents of pest aphids, and more than 130 species of the genus have been recorded worldwide. To date, only 15 Aphidius species have been recorded in South Korea. Using the DNA barcode region (ca. 658 bp) of mitochondrial cytochrome c oxidase subunit I (COI), we amplified sequences of 15 Aphidius Korean species, aligned them in combination with 23 reference species retrieved from GenBank for comparison and identification, and then reconstructed a barcode phylogeny by the neighbour-joining method. As a result, three Aphidius species were found to be new to Science. Descriptions and illustrations of the three species new to Science – Aphidius longicarpussp. nov., A. longistigmussp. nov., and A. asiaticussp. nov. – are provided, together with their phylogenetic position within the genus Aphidius. In addition, a redescription of A. areolatus, a parasitoid of maple aphids (Peryphillus spp.), is also given.

A study of the subfamily Archoleptonetinae (Araneae, Leptonetidae) with a review of the morphology and relationships for the Leptonetidae

Zootaxa ◽  
2010 ◽  
Vol 2391 (1) ◽  
pp. 1 ◽  
Author(s):  
JOEL M. LEDFORD ◽  
CHARLES E. GRISWOLD
Keyword(s):  
New Species ◽  
New Genus ◽  
Detailed Examination ◽  
Phylogenetic Position ◽  
New Combinations ◽  
Distribution Maps ◽  
San Lorenzo ◽  
Comparative Review ◽  
Phylogenetic Implications ◽  
Three New Species

Detailed examination of the spinning organs and legs of Archoleptoneta schusteri Gertsch (1974) has revealed a cribellum and calamistrum, which represents the discovery of the first cribellate member of the Leptonetidae. Subsequent examination of all other described Archoleptoneta species has confirmed the presence of a rectangular colulus similar to other leptonetids. A comparative review of the characters used to support the Leptonetidae is presented, including a discussion of their phylogenetic implications. The distribution of several features of the spinning organs, respiratory system, and genitalia suggests that the phylogenetic position of the Leptonetidae needs to be reevaluated, and makes their position within the Haplogynae uncertain. Illustrations and detailed discussion of characters in the Archoleptonetinae and Leptonetinae are provided. Archoleptoneta schusteri Gertsch is redescribed including detailed images of its spinning organs and genitalia. All ecribellate archoleptonetines are transferred to the new genus Darkoneta gen. nov. based on the loss of the cribellum, giving the following new combinations: Darkoneta arganoi (Brignoli, 1974). comb nov., Darkoneta garza (Gertsch, 1974) comb nov., Darkoneta obscura (Gertsch, 1974) comb nov., and Darkoneta stridulans (Platnick, 1994) comb nov. Three new species are described: Archoleptoneta gertschi sp. nov. from Eastern California, Darkoneta reddelli sp. nov. from Puebla, Mexico, and Darkoneta quetzal sp. nov. from San Lorenzo, Guatemala. Dichotomous keys are provided with a discussion of problems with the diagnosis of females. Distribution maps for each species are shown with a discussion of areas that require additional sampling in order to resolve species limits.

Levipalatum texanum n. gen., n. sp. (Nematoda: Diplogastridae), an androdioecious species from the south-eastern USA

Nematology ◽  
2014 ◽  
Vol 16 (6) ◽  
pp. 695-709 ◽  
Author(s):  
Erik J. Ragsdale ◽  
Erik J. Ragsdale ◽  
Natsumi Kanzaki ◽  
Erik J. Ragsdale ◽  
Natsumi Kanzaki ◽  
...  
Keyword(s):  
New Species ◽  
Model Organism ◽  
Sister Group ◽  
Small Subunit ◽  
Phylogenetic Position ◽  
Rrna Gene ◽  
Small Subunit Rrna ◽  
Protein Coding ◽  
Eastern Usa ◽  
A New Species

A new species of diplogastrid nematode, Levipalatum texanum n. gen., n. sp., was isolated from scarab beetles (Coleoptera: Scarabaeidae) in Texas and baited from soil in Virginia, USA. Levipalatum n. gen. is circumscribed by stomatal and pharyngeal morphology, namely a long, hooked dorsal tooth connected to a ‘palate’ projecting anteriad and mediad, subventral telostegostomatal ridges of denticles, and the dorsal radius of the pharynx bulging anteriad. The males of the new species are distinguished from most other Diplogastridae by the frequent presence of ten pairs of genital papillae. Phylogenetic relationships inferred from 11 ribosomal protein-coding genes and a fragment of the small subunit rRNA gene strongly support L. texanum n. gen., n. sp. to be a sister group to Rhabditolaimus, which lacks all the stegostomatal and pharyngeal characters diagnosing the new genus. The new species expands comparative studies of the radiation of feeding morphology that are anchored on the model organism Pristionchus pacificus. The phylogenetic position of L. texanum n. gen., n. sp. indicates a new case of convergent evolution of hermaphroditism in Diplogastridae.

Description and phylogenetic position of three new species of Stauroneis Ehrenberg (Bacillariophyceae: Stauroneidaceae) from the Indian Subcontinent

2021 ◽  
pp. 1-20
Author(s):  
Neha Wadmare ◽  
Abhishek Baghela ◽  
John Patrick Kociolek ◽  
Balasubramanian Karthick
Keyword(s):  
New Species ◽  
Indian Subcontinent ◽  
Phylogenetic Position ◽  
Three New Species
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