scholarly journals Rotifer Species Diversity in Mexico: An Updated Checklist

Diversity ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 291
Author(s):  
S. S. S. Sarma ◽  
Marco Antonio Jiménez-Santos ◽  
S. Nandini
Keyword(s):  
Species Diversity ◽  
Mexico City ◽  
Quintana Roo ◽  
Sampling Effort ◽  
Rotifer Species ◽  
Current Review ◽  
Species Complexes ◽  
Infraspecific Taxa ◽  
Species Extrapolation ◽  
Cryptic Taxa

A review of the Mexican rotifer species diversity is presented here. To date, 402 species of rotifers have been recorded from Mexico, besides a few infraspecific taxa such as subspecies and varieties. The rotifers from Mexico represent 27 families and 75 genera. Molecular analysis showed about 20 cryptic taxa from species complexes. The genera Lecane, Trichocerca, Brachionus, Lepadella, Cephalodella, Keratella, Ptygura, and Notommata accounted for more than 50% of all species recorded from the Mexican territory. The diversity of rotifers from the different states of Mexico was highly heterogeneous. Only five federal entities (the State of Mexico, Michoacán, Veracruz, Mexico City, Aguascalientes, and Quintana Roo) had more than 100 species. Extrapolation of rotifer species recorded from Mexico indicated the possible occurrence of more than 600 species in Mexican water bodies, hence more sampling effort is needed. In the current review, we also comment on the importance of seasonal sampling in enhancing the species richness and detecting exotic rotifer taxa in Mexico.

Comparative Analysis of Genetic and Morphological Variation within the Platanthera hyperborea Complex (Orchidaceae)

2020 ◽  
Vol 45 (4) ◽  
pp. 767-778
Author(s):  
Eranga Wettewa ◽  
Nick Bailey ◽  
Lisa E. Wallace
Keyword(s):  
North America ◽  
Diploid Species ◽  
Morphological Characters ◽  
Evolutionary Patterns ◽  
Founding Population ◽  
Multiple Origins ◽  
Geographic Structure ◽  
Species Complexes ◽  
Nuclear Its ◽  
Cryptic Taxa

Abstract—Species complexes present considerable problems for a working taxonomy due to the presence of intraspecific variation, hybridization, polyploidy, and phenotypic plasticity. Understanding evolutionary patterns using molecular markers can allow for a more thorough assessment of evolutionary lineages than traditional morphological markers. In this study, we evaluated genetic diversity and phylogenetic patterns among taxa of the Platanthera hyperborea (Orchidaceae) complex, which includes diploid (Platanthera aquilonis) and polyploid (Platanthera hyperborea, P. huronensis, and P. convallariifolia) taxa spanning North America, Greenland, Iceland, and Asia. We found that three floral morphological characters overlap among the polyploid taxa, but the diploid species has smaller flowers. DNA sequence variation in a plastid (rpL16 intron) and a nuclear (ITS) marker indicated that at least three diploid species have contributed to the genomes of the polyploid taxa, suggesting all are of allopolyploid origin. Platanthera convallariifolia is most like P. dilatata and P. stricta, whereas P. huronensis and P. hyperborea appear to have originated from crosses of P. dilatata and P. aquilonis. Platanthera huronensis, which is found across North America, has multiple origins and reciprocal maternal parentage from the diploid species. By contrast, P. hyperborea, restricted to Greenland and Iceland, appears to have originated from a small founding population of hybrids in which P. dilatata was the maternal parent. Geographic structure was found among polyploid forms in North America. The area of Manitoba, Canada appears to be a contact zone among geographically diverse forms from eastern and western North America. Given the geographic and genetic variation found, we recommend continued recognition of four green-flowered species within this complex, but caution that there may be additional cryptic taxa within North America.

Integrative taxonomy of giant crested Eusirus in the Southern Ocean, including the description of a new species (Crustacea: Amphipoda: Eusiridae)

2020 ◽  
Author(s):  
Marie L Verheye ◽  
Cédric D’Udekem D’Acoz
Keyword(s):  
New Species ◽  
Species Diversity ◽  
Morphological Analysis ◽  
Integrative Taxonomy ◽  
Putative Species ◽  
Species Complexes ◽  
Statistical Parsimony ◽  
Bayesian Implementation ◽  
A New Species ◽  
Giant Species

Abstract Among Antarctic amphipods of the genus Eusirus, a highly distinctive clade of giant species is characterized by a dorsal, blade-shaped tooth on pereionites 5–7 and pleonites 1–3. This lineage, herein named ‘crested Eusirus’, includes two potential species complexes, the Eusirus perdentatus and Eusirus giganteus complexes, in addition to the more distinctive Eusirus propeperdentatus. Molecular phylogenies and statistical parsimony networks (COI, CytB and ITS2) of crested Eusirus are herein reconstructed. This study aims to formally revise species diversity within crested Eusirus by applying several species delimitation methods (Bayesian implementation of the Poisson tree processes model, general mixed Yule coalescent, multi-rate Poisson tree processes and automatic barcode gap discovery) on the resulting phylogenies. In addition, results from the DNA-based methods are benchmarked against a detailed morphological analysis of all available specimens of the E. perdentatus complex. Our results indicate that species diversity of crested Eusirus is underestimated. Overall, DNA-based methods suggest that the E. perdentatus complex is composed of three putative species and that the E. giganteus complex includes four or five putative species. The morphological analysis of available specimens from the E. perdentatus complex corroborates molecular results by identifying two differentiable species, the genuine E. perdentatus and a new species, herein described as Eusirus pontomedon sp. nov.

scholarly journals Seasonal Changes In Species Diversity And Dominance Structure In Communities Of Oribatid Mites (Sarcoptiformes, Oribatei) In Megalopolis Green Areas

2014 ◽  
Vol 48 (1) ◽  
pp. 3-10 ◽  
Author(s):  
O. S. Shevchenko ◽  
L. A. Kolodochka
Keyword(s):  
Species Diversity ◽  
Seasonal Changes ◽  
Oribatid Mites ◽  
Seasonal Fluctuations ◽  
Species Complexes ◽  
Dominance Structure ◽  
Green Areas ◽  
Different Parts

Abstract Species complexes of oribatid mites in soil and litter in 10 plots in green areas of different parts of Kyiv city in April-September 2011 were studied. In total, 107 species of 76 genera of 44 families of oribatids were found. Trends of seasonal fluctuations of species diversity and dominance structure of oribatids in studied plots were assessed.

scholarly journals SPECIES COMPLEXES OF THE ORIBATID MITES (SARCOPTIFORMES, ORIBATEI) IN SOILS OF URBAN STREET LAWNS WITH DIFFERENT POLLUTION RATES

2013 ◽  
Vol 47 (6) ◽  
pp. 49-52 ◽  
Author(s):  
O. S. Shevchenko ◽  
L. A. Kolodochka
Keyword(s):  
Species Diversity ◽  
Soil Pollution ◽  
Oribatid Mites ◽  
Urban Street ◽  
Total Soil ◽  
Species Complexes

Abstract Species complexes of oribatid mites at six plots on the street lawns in one of Kyiv districts are studied. In total 27 species of 26 genera and 19 families of oribatid mites are found. Direct correlation between oribatid species diversity and the level of total soil pollution is not shown.

A new species of Trachylepis (Squamata: Scincidae) from the Amhara Region, Ethiopia, and a key to the Ethiopian Trachylepis

Zootaxa ◽  
2020 ◽  
Vol 4859 (1) ◽  
pp. 113-126
Author(s):  
THORE KOPPETSCH
Keyword(s):  
New Species ◽  
New Record ◽  
Morphological Characteristics ◽  
Colour Pattern ◽  
Amhara Region ◽  
Species Complexes ◽  
Ecological Importance ◽  
Cryptic Taxa ◽  
Biogeographical Pattern ◽  
A New Species

Ethiopia is known for its highly endemic and rich herpetofaunal diversity shaped by its biogeographical patterns. Here, a new species of skink, Trachylepis boehmei sp. nov., is described from the Ethiopian Highlands. It differs from its congeners in having smooth uncarinated dorsal scales, 26–29 scale rows around midbody, a slender body of small size, a relatively short tail, a low eye–snout distance and a unique colour pattern with 6–8 darkish brown dorsal stripes. Based on morphological characteristics, its biogeographical pattern and comparisons with other similar congeners this new species is closely related to Trachylepis megalura. A published new record of Trachylepis wingati for the Kafa region is re-examined and identified as T. megalura. An updated comprehensive key to the Trachylepis found in Ethiopia is provided. In the context of ongoing phylogenetic and taxonomic revisions of Trachylepis and its species complexes the presence of further cryptic taxa can be expected also for the Ethiopian biodiversity hotspots. Consequently, the need of further herpetological investigations in this region of ecological importance is stressed. 

SPECIES DIVERSITY IN THE TRIBE AGARICEAE PAT. (HIGHER BASIDIOMYCETES) OF ISRAEL MYCOBIOTA

1998 ◽  
Vol 46 (4) ◽  
pp. 315-330
Author(s):  
Solomon P. Wasser
Keyword(s):  
Species Diversity ◽  
Middle East ◽  
General Distribution ◽  
Taxonomic Study ◽  
Infraspecific Taxa

A taxonomic study of the tribe Agariceae Pat. (Higher Basidiomycetes) of Israel is given. The tribe Agariceae is represented by 38 species and infraspecific taxa related to 3 genera:MelanophyllumVel.,AgaricusL: Fr. emend. Karst., andGyrophragmiumMont. Three species:Agaricus boniiS. Wasser,A. nevoiS. Wasser, andA. herinkiiS. Wasser, were described as new for science earlier.Melanophyllum haematospermum(Bull: Fr.) Kreisel,Agaricus aestivalisMoell. var.flavotacta(Moell.) Moell.,A. bitorquis(Quél.) Sacc.,A. campestrisL: Fr. Var.floccipes(Moell.) Pil.,A. geesteraniiBas et Heinem.,A. gennadii(Chat. et Bond.) P.D. Orton var.microsporus(Bohus) S. Wasser,A. impudicus(Rea) Pil.,A. praeclaresquamosusFreeman,A. pequinii(Bond.) Konr. et Maubl.,A. silvaticusSchaeff. varpallensPil.,A. xanthodermaGen. var.lepiotoidesR. Mre,A. vaporarius(Pers.) Cappelli, andA. lanipes(Moell. et J. Schaeff.) Sing, are new for Israel and some of them for Asia or for the Middle East. Synonyms, locations, and dates of collection in Israel, peculiarities, general distribution, as well as taxonomic remarks to some taxa are given.

scholarly journals A high-throughput amplicon sequencing approach for population-wide species diversity and composition survey

2020 ◽  
Author(s):  
WT Tay ◽  
LN Court ◽  
S Macfadyen ◽  
F Jacomb ◽  
S Vyskočilová ◽  
...  
Keyword(s):  
Species Diversity ◽  
High Throughput ◽  
Plant Viruses ◽  
Small Sample ◽  
Sub Saharan Africa ◽  
Molecular Diagnostic ◽  
Sampling Effort ◽  
Ecological Knowledge ◽  
Pest Species ◽  
Test Species

AbstractManagement of agricultural pests requires an understanding of pest species diversity, their interactions with beneficial insects and spatial-temporal patterns of pest abundance. Invasive and agriculturally important insect pests can build up very high populations, especially in cropping landscapes. Traditionally, sampling effort for species identification involves small sample sizes and is labour intensive. Here, we describe a high throughput sequencing (HTS) PCR amplicon method and associated analytical workflow for a rapid, intensive, high-volume survey of pest species compositions. We demonstrate our method using the Bemisia pest cryptic species complex as examples. The whiteflies Bemisia including the ‘tabaci’ species are agriculturally important capable of vectoring diverse plant viruses that cause diseases and crop losses. We use our HTS amplicon platform to simultaneously process high volumes of whitefly individuals, with efficiency to detect rare (i.e., 1%) test-species and beneficial hymenopteran parasitoid species. Field-testing our HTS amplicon method across the Tanzania, Uganda and Malawi cassava cultivation landscapes, we identified the sub-Saharan Africa 1 Bemisia putative species as the dominant pest species, with other cryptic Bemisia species being detected at various abundances. We also provide evidence that Bemisia species compositions can be affected by sampling techniques that target either nymphs or adults. Our method is particularly suitable to molecular diagnostic surveys of cryptic insect species with high population densities. Our approach can be adopted to understand species biodiversity across landscapes, with broad implications for improving trans-boundary biosecurity preparedness, thus contributing to molecular ecological knowledge and the development of control strategies for high-density, cryptic, pest-species complexes.

Species diversity and spatial distribution of Begonia L. (Begoniaceae) in the Daweishan Range, Yunnan Province, China

Phytotaxa ◽  
2019 ◽  
Vol 415 (1) ◽  
pp. 1-31 ◽  
Author(s):  
WEN-HONG CHEN ◽  
SU-HUA HUANG ◽  
AUNG AUNG ◽  
HUI-KUN YUAN ◽  
YU-MIN SHUI
Keyword(s):  
Spatial Distribution ◽  
Species Diversity ◽  
Geographical Distribution ◽  
Yunnan Province ◽  
Southwestern China ◽  
Floristic Diversity ◽  
Infraspecific Taxa ◽  
Distribution And Ecology

Seven sections and 50 species and infraspecific taxa of Begonia have been recorded in the Daweishan Range of Yunnan Province, southwestern China. This work aims to analyze the relationships between their geographical distribution and ecology, review their floristic diversity, and elucidate the abundance and horticultural value of Begonia resources in this region.

Rotifer species diversity and community structure in the pelagic zone of the Liuxihe Reservoir

2017 ◽  
Vol 37 (4) ◽  
Author(s):  
温展明 WEN Zhanming ◽  
徐健荣 XU Jianrong ◽  
林秋奇 LIN Qiuqi ◽  
韩博平 HAN Boping
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Pelagic Zone ◽  
Rotifer Species ◽  
Liuxihe Reservoir
Sign in / Sign up

Export Citation Format

Share Document