scholarly journals Schmidtea sp., from the S-W Romania (Platyhelminthes, Tricladida, Dugesiidae)

2021 ◽  
Author(s):  
Babalean Anda Felicia
Keyword(s):  
Molecular Analysis ◽  
Morphological Characters ◽  
Seminal Vesicles ◽  
Species Level ◽  
Copulatory Apparatus ◽  
De Vries

The morphology and the anatomy of the copulatory apparatus in a Dugesiidae population from the SW Romania are presented. The copulatory apparatus is characterized by intermingled bursal canal musculature and two distinct penis bulbs with two large seminal vesicles. Based on these morphological characters, the population is assigned to the lugubris-polychroa group of species, now belonging to the genus Schmidtea (de Vries & Sluys 1991). The copulatory apparatus is also characterised by the presence of an atrial fold, characteristic of S. mediterranea. The assign of the morphotype here presented to the species level is delayed until integrative molecular analysis.

scholarly journals Molecular Correlation between Larval, Deutonymph and Adult Stages of the Water Mite Arrenurus (Micruracarus) Novus

Life ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 108
Author(s):  
Pedro María Alarcón-Elbal ◽  
Ricardo García-Jiménez ◽  
María Luisa Peláez ◽  
Jose Luis Horreo ◽  
Antonio G. Valdecasas
Keyword(s):  
Culex Pipiens ◽  
Adult Stage ◽  
Gravid Female ◽  
Morphological Characters ◽  
Species Level ◽  
Life Stages ◽  
Water Mite ◽  
Molecular Correlation ◽  
The Common ◽  
Morphological Transformations

The systematics of many groups of organisms has been based on the adult stage. Morphological transformations that occur during development from the embryonic to the adult stage make it difficult (or impossible) to identify a juvenile (larval) stage in some species. Hydrachnidia (Acari, Actinotrichida, which inhabit mainly continental waters) are characterized by three main active stages—larval, deutonymph and adult—with intermediate dormant stages. Deutonymphs and adults may be identified through diagnostic morphological characters. Larvae that have not been tracked directly from a gravid female are difficult to identify to the species level. In this work, we compared the morphology of five water mite larvae and obtained the molecular sequences of that found on a pupa of the common mosquito Culex (Culex) pipiens with the sequences of 51 adults diagnosed as Arrenurus species and identified the undescribed larvae as Arrenurus (Micruracarus) novus. Further corroborating this finding, adult A. novus was found thriving in the same mosquito habitat. We established the identity of adult and deutonymph A. novus by morphology and by correlating COI and cytB sequences of the water mites at the larval, deutonymph and adult (both male and female) life stages in a particular case of ‘reverse taxonomy’. In addition, we constructed the Arrenuridae phylogeny based on mitochondrial DNA, which supports the idea that three Arrenurus subgenera are ‘natural’: Arrenurus, Megaluracarus and Micruracarus, and the somewhat arbitrary distinction of the species assigned to the subgenus Truncaturus.

scholarly journals Plantago campestris (Plantaginaceae), a rare new species from southern Brazil, supported by phylogenomic and morphological evidence

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11848
Author(s):  
Gustavo Hassemer ◽  
Elliot M. Gardner ◽  
Nina Rønsted
Keyword(s):  
New Species ◽  
Species Complex ◽  
High Throughput Sequencing ◽  
Morphological Characters ◽  
High Elevation ◽  
Species Level ◽  
Morphological Evidence ◽  
Southern Brazil ◽  
A New Species ◽  
Iucn Criteria

High-throughput sequencing, when combined with taxonomic expertise, is a powerful tool to refine and advance taxonomic classification, including at the species level. In the present work, a new species, Plantago campestris, is described out of the P. commersoniana species complex, based on phylogenomic and morphological evidence. The main morphological characters that distinguish the new species from P. commersoniana are the glabrous posterior sepals and the slightly broader leaves. The new species is known from only three localities, all in natural high-elevation grasslands in Paraná and Santa Catarina states, southern Brazil. According to the IUCN criteria new species should be assessed as Endangered (EN). We present field photographs of P. campestris and related species, and we provide an identification key to the species previously included within the circumscription of P. commersoniana.

Extended family: a caddisfly new to Saskatchewan, Canada with notes on the life history ofNeophylax splendens(Trichoptera: Thremmatidae)

2014 ◽  
Vol 147 (4) ◽  
pp. 425-431 ◽  
Author(s):  
Brittney M. Hoemsen ◽  
Iain D. Phillips ◽  
Dale W. Parker ◽  
Aaron J. Bell ◽  
Jordyn A. Bergsveinson ◽  
...  
Keyword(s):  
United States ◽  
Life History ◽  
Genetic Analysis ◽  
United States Of America ◽  
Extended Family ◽  
Morphological Characters ◽  
Species Level ◽  
Macroinvertebrate Communities ◽  
Biological Surveys ◽  
Pupal Diapause

AbstractStreams draining the Cypress Hills support unique and understudied macroinvertebrate communities in Saskatchewan, Canada. Here, we report the discovery of a species of caddisfly new to the Cypress Hills and Saskatchewan,Neophylax splendensDenning (Trichoptera: Thremmatidae). Larvae were collected early in May 2012, and are found to enter pre-pupal diapause in mid-June until mid-September. Larvae were identified asN. splendensby morphological characters and verified with genetic analysis. Its occurrence strengthens the biogeographical link between the montane regions in British Columbia, Canada and Utah, United States of America with the southwest corner of Saskatchewan. This study highlights the importance of seasonal sampling, resolute species level identifications in biological surveys and the use of genetic analyses to obtain this level of identification.

Taxonomic status of Andersen’s fruit-eating bat (Artibeus jamaicensis aequatorialis) and revised classification of Artibeus (Chiroptera: Phyllostomidae)

Zootaxa ◽  
2010 ◽  
Vol 2648 (1) ◽  
pp. 45 ◽  
Author(s):  
PETER A. LARSEN ◽  
MARÍA R. MARCHÁN-RIVADENEIRA ◽  
ROBERT J. BAKER
Keyword(s):  
Taxonomic Status ◽  
Morphological Characters ◽  
Species Level ◽  
South American ◽  
Reciprocal Monophyly ◽  
Dna Variation ◽  
The Andes ◽  
Artibeus Jamaicensis ◽  
Phylogenetic Studies

Fruit-eating bats of the genus Artibeus are widely distributed across the Neotropics and are one of the most recently evolved assemblages of the family Phyllostomidae. Although the taxonomy and systematics of species of Artibeus has been the subject of an intense historical debate, the most current taxonomic arrangements recognize approximately eleven species within the genus. However, recent phylogenetic studies indicate that species diversity within South and Middle American populations of Artibeus is underestimated. South American populations referable to A. jamaicensis aequatorialis are of considerable interest because previous studies of mitochondrial DNA variation identified potential species level variation west of the Andes Mountains. In this study we use morphometric and genetic data (nuclear AFLPs) to investigate the taxonomic status of A. j. aequatorialis. Our results indicate that elevating aequatorialis to species level is appropriate based on statistically supported reciprocal monophyly in mitochondrial and nuclear datasets and diagnostic morphological characters. In light of our results, and of those presented elsewhere, we provide a revised classification of the genus.

scholarly journals Taxonomy of the genus Commelina Plum. ex L. (Commelinaceae) in Nepal

2010 ◽  
Vol 6 ◽  
pp. 25-31 ◽  
Author(s):  
Jyoti P Gajurel ◽  
Krishna K Shrestha
Keyword(s):  
Key Words ◽  
Taxonomic Status ◽  
Morphological Characters ◽  
Species Level ◽  
Morphological Data ◽  
Plant Science ◽  
The World ◽  
Voucher Specimens ◽  
Key Words Anatomy ◽  
Anatomical Characters

About 170 species of Commelina are known from tropical and subtropical regions of the world. Nepal contributes 6 species of Commelina to the world flora. In the present work, taxonomy of all the six species of Commelina reported from Nepal (C. benghalensis, C. caroliniana, C. diffusa, C. maculata, C. paludosa and C. suffruticosa) was studied. Voucher specimens were collected from Central and Eastern Nepal, covering 14 districts. Morphological characters were studied from these collections. Palynological and anatomical characters were also used to see if they are taxonomically important to delimit the taxa within Commelina. Morphological characters seemed promising to delimit the taxa within Commelina. The key identifying characters at species level are modification in root, form of spathe, structure of leaves and seeds, shape of stomata and pollen. Palynological and anatomical characters were also useful, to some extent, in separating some species, but were not significant as compared to morphological data. Some specimens, close to C. benghalensis and C. caroliniana, showed very different characters. Thus further study is needed to confirm their taxonomic status. Key-words: anatomy; flora; morphological characters; palynology; voucher specimens.DOI: 10.3126/botor.v6i0.2907 Botanica Orientalis - Journal of Plant Science (2009) 6: 25-31

Musa markkuana stat. nov. (Musaceae)—A reassessment of Musa velutina subsp. markkuana

Phytotaxa ◽  
2017 ◽  
Vol 303 (3) ◽  
pp. 279
Author(s):  
V. S. HAREESH ◽  
A. JOE ◽  
P. E. SREEJITH ◽  
M. SABU
Keyword(s):  
Morphological Characters ◽  
Species Level ◽  
Fruit Peel ◽  
Musa Velutina

Musa velutina subsp. markkuana was published based on morphological characters. Present studies on anatomy of lamina, midrib, petiole, bract, fruit peel and seeds, palynology and micromorphology of seeds of M. velutina and M. velutina subsp. markkuana have revealed that the differences are strong enough to treat the subspecies to species level, M. markkuana stat. nov. Photomicrographs of all parts and comparison charts are provided.

A new species from the temporary ponds of southwest Portugal: Helosciadium milfontinum

Phytotaxa ◽  
2020 ◽  
Vol 456 (1) ◽  
pp. 49-62
Author(s):  
EDUARDO CIRES ◽  
CARLA PINTO-CRUZ ◽  
HERMINIO S. NAVA ◽  
JOSÉ ANTONIO FERNÁNDEZ PRIETO
Keyword(s):  
New Species ◽  
Molecular Analysis ◽  
Conservation Status ◽  
Morphological Characters ◽  
Internal Transcribed Spacers ◽  
Temporary Ponds ◽  
New Taxon ◽  
Taxonomic Relationships ◽  
Threatened Plant ◽  
A New Species

The genus Helosciadium has six species of which three have been identified in Portugal: H. nodiflorum, frequent and abundant in much of the territory, and H. inundatum and H. repens, with a scattered distribution in Portugal. In the present study, a new species, Helosciadium milfontinum, a seriously threatened plant endemic, rare and scarce that grows in the temporary ponds of the Vicentinan Coastal District is described and illustrated. Morphological characters and molecular analysis of nuclear internal transcribed spacers (ITS) and plastid regions (matK, rps16-trnK and trnL-F) confirm the existence of this new taxon. Conservation status and taxonomic relationships of the new species are examined.

The systematic position of the genus Rhinanthus (Scrophulariaceae) in North America

1986 ◽  
Vol 64 (7) ◽  
pp. 1443-1449 ◽  
Author(s):  
Robert van Hulst ◽  
Andrée Thériault ◽  
Bill Shipley
Keyword(s):  
North American ◽  
Seed Protein ◽  
Seed Proteins ◽  
Great Majority ◽  
Morphological Characters ◽  
Systematic Position ◽  
Seed Morphology ◽  
Species Level ◽  
General Morphology ◽  
Interpopulation Variation

North American plants of the genus Rhinanthus are generally designated as R. crista-galli L., or sometimes as R. borealis (Sterneck) Druce or R. stenophyllus (Schur) Druce. The name R. crista-galli, however, has been declared a nomen dubium, and in Europe the corresponding plant is now known as R. minor L. We have compared North American and European material of Rhinanthus on the basis of general morphology, soluble seed proteins, and seed morphology. General morphology proved to be a poor guide to interpopulation variation in these highly plastic plants, even when aided by numerical methods. Seed protein banding has already been shown to be an extremely valuable and stable guide to taxonomy at or below the species level. We have demonstrated four distinct protein banding types in our material: a southeastern Canadian type (S), a northern Canadian type (N), a European type (E), and a hybrid between S and N. Subsequently, we have attempted to allocate populations to the correct seed protein type on the basis of seed morphology alone using discriminant analysis. This allocation is correct in the great majority of cases. We propose that both the southern Canadian and European types be designated as R. minor var. minor (although the two types can in some cases be distinguished on the basis of seed proteins), and that the northern Canadian type be called R. minor var. borealis. We also present a survey of the seed morphological characters that serves to distinguish the two varieties.

scholarly journals Occurrence of Neobenedenia girellae (Monogenea: Capsalidae) in Gilthead Seabream Sparus aurata (Actinopterygii: Sparidae) Cultured in Portugal

Pathogens ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1269
Author(s):  
Perla Tedesco ◽  
Monica Caffara ◽  
Nuno Miguel Ribeiro Moreira ◽  
César Gomes ◽  
Andrea Gustinelli ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Molecular Analysis ◽  
Morphological Analysis ◽  
Sparus Aurata ◽  
Species Level ◽  
Gilthead Seabream ◽  
Potential Threat ◽  
Definition Of ◽  
Scanning Electron ◽  
Specific Identity

Monogenean capsalids of the genus Neobenedenia are widespread parasites of wild and farmed marine fish, and represent a potential threat to mariculture due to their pathogenicity and ability to cause mortality in fish maintained in controlled conditions. The identification of Neobenedenia species and, consequently, the definition of their host specificity is often problematic due to their highly conserved morphology; therefore, in order to establish their specific identity, microscopic observation should be complemented with molecular analysis. The present work aims at characterizing Neobenedenia specimens infecting the skin of cage reared gilthead seabream Sparus aurata from Portugal. Parasite samples obtained from caged fish were processed for morphological analysis, through observation in light and scanning electron microscopy, and for molecular analysis, through amplification and sequencing of 28S rDNA and cytB, aimed at identifying them to the species level. Our results showed that the collected parasites belonged to the species Neobenedenia girellae; the susceptibility of S. aurata towards this pathogenic capsalid monogenean highlighted in the present work represents an important risk in the farming of this valuable fish species.

scholarly journals Morphological and molecular data reveal a new genus of the tribe Issini from Southern China (Hemiptera, Fulgoromorpha, Issidae)

ZooKeys ◽  
2018 ◽  
Vol 766 ◽  
pp. 51-61 ◽  
Author(s):  
Menglin Wang ◽  
Aimin Shi ◽  
Thierry Bourgoin
Keyword(s):  
New Species ◽  
Molecular Analysis ◽  
New Genus ◽  
Southern China ◽  
Morphological Characters ◽  
Molecular Data ◽  
Sichuan Province ◽  
Chongqing Municipality ◽  
Morphological And Molecular Data ◽  
A New Species

A new genusSinonissusgen. n.of the tribe Issini (Issidae, Issinae) with a new speciesSinonissusbrunetussp. n.from Chongqing municipality and Sichuan Province, China are described. Barcode of the species is provided. A molecular analysis combined with morphological characters confirms its placement into the Issini. Distribution of this new genus in the Oriental realm is briefly discussed in regard of other Issinae taxa in China.

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