scholarly journals Molecular Phylogeny and Morphological Distinctions of Two Popular Bivalves,Ctenoides scaberandCtenoides mitis

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Lindsey F. Dougherty ◽  
Jingchun Li
Keyword(s):  
Molecular Phylogeny ◽  
Species Identification ◽  
Morphological Characters ◽  
Morphological Features ◽  
Close Relative ◽  
Systematic Revision ◽  
The Past ◽  
Taxonomic Confusion ◽  
Collection Practices

One of the most well-known species in the bivalve family Limidae (d’Orbigny, 1846) is the brightly coloredCtenoides scaber(Born, 1778), commonly known as the rough file clam or flame scallop. Distinguishing this bivalve from its close relative,C. mitis(Lamarck, 1807), can be difficult using only morphological features and has led to much taxonomic confusion throughout the literature. In this study, morphological characters were compared to a molecular phylogeny constructed using three genes (COI, 28S, and H3) in order to differentiateC. scaberandC. mitis.The phylogeny recovered two well-supported clades that differ significantly in shell rib numbers, but not tentacle colors. The two species were then placed in a larger phylogenetic context of the Limidae family, which revealed the need for further systematic revision across genera. As these bivalves are popular in aquaria, cannot be tank-raised, and have been overcollected in the past, proper species identification is important for assessing sustainable collection practices.

Molecular phylogeny confirms the placement of enigmatic Stachys persepolitana in Lamium (Lamiaceae; subfam. Lamioideae)

Phytotaxa ◽  
2015 ◽  
Vol 192 (4) ◽  
pp. 254
Author(s):  
Yasaman Salmaki ◽  
MIKA BENDIKSBY ◽  
GÜNTHER HEUBL
Keyword(s):  
Molecular Phylogeny ◽  
Dna Sequence ◽  
Sequence Data ◽  
Nuclear Data ◽  
Morphological Characters ◽  
Morphological Features ◽  
Phylogenetic Position ◽  
Rps16 Intron ◽  
Dna Sequence Data ◽  
Anterior Pair

The main purpose of this study was to test the hypothesis that Stachys persepolitana is extraneous in Stachys (tribe Stachydeae, subfam. Lamioideae, Lamiaceae) and instead belongs to the genus Lamium (Lamieae, Lamioideae). We investigated the phylogenetic position of S. persepolitana using plastid (rps16 intron, trnL-F and matK regions) and nuclear (nrITS) DNA sequence data with both parsimony and Bayesian phylogenetic approaches. Plastid and nuclear data strongly support that S. persepolitana is extraneous in Stachys and belongs in fact to the genus Lamium. Morphological characters also corroborate its placement in Lamium. Most of the morphological features used to distinguish S. persepolitana from the rest of Stachys fit with Lamium. Anterior pair of stamens bending outward after pollination, anthers hairy and mericarps triquetrous are the most important characters correlating S. persepolitana to Lamium.

scholarly journals Molecular phylogeny and taxonomy of theEpictia goudotiiSpecies complex (Serpentes: Leptotyphlopidae: Epictinae) in Middle America and northern South America

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1551 ◽  
Author(s):  
James R. McCranie ◽  
S. Blair Hedges
Keyword(s):  
South America ◽  
Molecular Phylogeny ◽  
Species Complex ◽  
Taxonomic Status ◽  
Molecular Data ◽  
External Morphology ◽  
Close Relative ◽  
The Past ◽  
As Species ◽  
Northern South America

Here we review the systematics of the threadsnakes of theEpictia goudotiiSpecies complex in Middle and northern South America using external morphology and molecular data. Two species,Epictia goudotiiandE. magnamaculata, are currently recognized from that region, but we provide evidence for recognizing, as species, three other nominal forms usually treated as subspecies ofE. goudotii:E. ater, E. bakewelli, andE. phenops. Thus, together withE. columbi(Bahamas), we recognize six species in theEpictia goudotiiSpecies complex. BecauseE. albifronsfrom northern South America has been confused withE. goudotiiin the past, we also briefly discuss the taxonomic status of that species and its apparent close relativeE. tenella, which are not members of theE. goudotiicomplex.

Morphology, nomenclature and distribution of Bassia monticola (Chenopodiaceae-Amaranthaceae), a poorly known species from Western Asia

2020 ◽  
pp. 13-17
Author(s):  
A. P. Sukhorukov ◽  
M. A. Kushunina
Keyword(s):  
Molecular Phylogeny ◽  
Morphological Characters ◽  
Mountainous Regions ◽  
Western Asia

Kochia monticola was previously considered as a synonym for the widely distributed Irano-Turanian Panderia pilosa. After the merger of Kochia and Panderia with Bassia based on molecular phylogeny, K. monticola remained a synonym of Bassia pilosa. We claim that Bassia monticola, a name proposed by Kuntze (1891) for K. monticola, should be separated from B. pilosa based on morphological characters and localised distribution in mountainous regions of Iran, Iraq, Syria, and Lebanon at altitudes 1800–2600 m a. s. l.

scholarly journals Addressing widespread misidentifications of traditional medicinal mushrooms in Sanghuangporus (Basidiomycota) through ITS barcoding and designation of reference sequences

IMA Fungus ◽  
2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Shan Shen ◽  
Shi-Liang Liu ◽  
Ji-Hang Jiang ◽  
Li-Wei Zhou
Keyword(s):  
Species Identification ◽  
Rolling Circle Amplification ◽  
Practical Method ◽  
Morphological Characters ◽  
Its Sequences ◽  
Commercial Development ◽  
Medicinal Mushrooms ◽  
Rolling Circle ◽  
Reference Sequences ◽  
Its Barcoding

Abstract“Sanghuang” refers to a group of important traditionally-used medicinal mushrooms belonging to the genus Sanghuangporus. In practice, species of Sanghuangporus referred to in medicinal studies and industry are now differentiated mainly by a BLAST search of GenBank with the ITS barcoding region as a query. However, inappropriately labeled ITS sequences of “Sanghuang” in GenBank restrict accurate species identification and, to some extent, the utilization of these species as medicinal resources. We examined all available 271 ITS sequences related to “Sanghuang” in GenBank including 31 newly submitted sequences from this study. Of these sequences, more than half were mislabeled so we have now corrected the corresponding species names. The mislabeled sequences mainly came from strains utilized by non-taxonomists. Based on the analyses of ITS sequences submitted by taxonomists as well as morphological characters, we separate the newly described Sanghuangporus subbaumii from S. baumii and treat S. toxicodendri as a later synonym of S. quercicola. Fourteen species of Sanghuangporus are accepted, with intraspecific distances up to 1.30% (except in S. vaninii, S. weirianus and S. zonatus) and interspecific distances above 1.30% (except between S. alpinus and S. lonicerinus, and S. baumii and S. subbaumii). To stabilize the concept of these 14 species of Sanghuangporus, their taxonomic information and reliable ITS reference sequences are provided. Moreover, ten potential diagnostic sequences are provided for Hyperbranched Rolling Circle Amplification to rapidly confirm three common commercial species, viz. S. baumii, S. sanghuang, and S. vaninii. Our results provide a practical method for ITS barcoding-based species identification of Sanghuangporus and will promote medicinal studies and commercial development from taxonomically correct material.

A large new species of Rhinella (Anura: Bufonidae) from Cerrado of Brazil

Zootaxa ◽  
2007 ◽  
Vol 1627 (1) ◽  
pp. 23-39 ◽  
Author(s):  
NATAN M. MACIEL ◽  
REUBER A. BRANDÃO ◽  
LEANDRO A. CAMPOS ◽  
ANTONIO SEBBEN
Keyword(s):  
Phylogenetic Analysis ◽  
New Species ◽  
Morphological Characters ◽  
Morphological Features ◽  
Advertisement Call ◽  
Sexually Dimorphic ◽  
Rhinella Marina ◽  
Large Size ◽  
Morphometric Feature ◽  
Distrito Federal

A new toad, Rhinella cerradensis, is described, including its tadpole and the advertisement call. The new species occupies Cerrado habitats in the Brazilian states of Piauí, Bahia, Goiás, Minas Gerais, and Distrito Federal. The species is characterized by its large size; absence of tibial glands; well developed cranial crests; short hands; sexually dimorphic coloration; and by the absence of a spiracle tube of the tadpole. The new species is included in the Rhinella marina group by the presence of a jagged suture formed by the articulation between the pterygoid medial ramus and the parasphenoid alae, as well as other shared morphological features. Morphological characters and statistical analyses inferred by morphometric feature suggest the existence of two subgroups of species within R. marina group. However, taxonomic rearrangements are not made here and await phylogenetic analysis.

scholarly journals Species Identification and Antifungal Susceptibility Patterns of Species Belonging to Aspergillus Section Nigri

2009 ◽  
Vol 53 (10) ◽  
pp. 4514-4517 ◽  
Author(s):  
Laura Alcazar-Fuoli ◽  
Emilia Mellado ◽  
Ana Alastruey-Izquierdo ◽  
Manuel Cuenca-Estrella ◽  
Juan L. Rodriguez-Tudela
Keyword(s):  
Phylogenetic Analysis ◽  
Species Identification ◽  
Antifungal Susceptibility ◽  
Morphological Features ◽  
Correct Classification ◽  
Paradoxical Effect ◽  
Aspergillus Section Nigri ◽  
Susceptibility Patterns ◽  
Aspergillus Section

ABSTRACT A phylogenetic analysis was performed for 34 Aspergillus strains belonging to section Nigri. Molecular methods allowed for the correct classification into three different clades (A. niger, A. tubingensis, and A. foetidus). Correlation with in vitro itraconazole susceptibility distinguished the following three profiles: susceptible, resistant, and showing a paradoxical effect. A number of different species whose morphological features resemble those of A. niger showed unusual MICs to itraconazole that have never been described for the Aspergillus genus.

scholarly journals Nothing in (sponge) biology makes sense – except when based on holotypes

2015 ◽  
Vol 96 (2) ◽  
pp. 305-311 ◽  
Author(s):  
Dirk Erpenbeck ◽  
Merrick Ekins ◽  
Nicole Enghuber ◽  
John N.A. Hooper ◽  
Helmut Lehnert ◽  
...  
Keyword(s):  
New Species ◽  
Reference Material ◽  
Species Identification ◽  
Dna Sequences ◽  
Morphological Plasticity ◽  
Morphological Characters ◽  
Molecular Techniques ◽  
Reference Sequences ◽  
Species Descriptions ◽  
Preservation History

Sponge species are infamously difficult to identify for non-experts due to their high morphological plasticity and the paucity of informative morphological characters. The use of molecular techniques certainly helps with species identification, but unfortunately it requires prior reference sequences. Holotypes constitute the best reference material for species identification, however their usage in molecular systematics and taxonomy is scarce and frequently not even attempted, mostly due to their antiquity and preservation history. Here we provide case studies in which we demonstrate the importance of using holotype material to answer phylogenetic and taxonomic questions. We also demonstrate the possibility of sequencing DNA fragments out of century-old holotypes. Furthermore we propose the deposition of DNA sequences in conjunction with new species descriptions.

Morphogenetic features of garnets from Dyukunakh placer (Yakutian diamondiferous province)

2021 ◽  
pp. 106-112
Author(s):  
Elvira Vlasova ◽  
Aleksandr Khmelkov
Keyword(s):  
Morphological Characters ◽  
Morphological Features ◽  
Primary Sources ◽  
Residual Soil ◽  
Coastal Marine ◽  
Upper Paleozoic ◽  
Morphogenetic Analysis

Morphological features of garnets from the Upper Paleozoic Dyukunakh placer were studied and the conditions of their morphogenesis were interpreted. As a result of the morphogenetic analysis, it was found that garnets have evolved in exogenous conditions, including extreme wear in coastal marine conditions and repeated redeposition. In addition, garnets underwent significant hypergene corrosion in the residual soil and subsequent dissolution under metasomatic conditions. As a result of such exogenous evolution, no trace of their primary morphological characters associated with the deep stage of morphogenesis remained on garnets. For this reason, it is impossible to quantify the degree of primary sources removal.

A review of Cryphocricos Signoret, 1850 (Naucoridae: Cryphocricinae) with descriptions of three new species

Zootaxa ◽  
2021 ◽  
Vol 4958 (1) ◽  
pp. 72-94
Author(s):  
ROBERT W. SITES
Keyword(s):  
New Species ◽  
Molecular Phylogeny ◽  
Intraspecific Variation ◽  
New World ◽  
Morphological Features ◽  
Type Specimens ◽  
Three New Species ◽  
Aquatic Bugs ◽  
High Degree

The genus Cryphocricos Signoret, 1850 was recently determined in a molecular phylogeny to be distantly related to other taxa of the subfamily Cryphocricinae to the extent that it is now once again the sole member of the subfamily. This exclusively New World group of aquatic bugs lives in fast and usually turbulent current and respires by means of a plastron. Efforts to identify morphological features to distinguish among the species have largely fallen short, and some species have been established based on features that exhibit a high degree of intraspecific variation overlapping those of other species. Presented here is a review of the 13 described species with discussions of their features and photos of type specimens, and three new species from Venezuela and Colombia are described. Also presented is a diagnostic attribute unique to the enigmatic Cryphocricos barozzii Signoret, 1850. 

A Study of Correlation between Morphology and Evolution of Euphorbiaceae s.l. using Taxonomic Congruence and Total Evidence

2021 ◽  
Vol 9 (1) ◽  
pp. 49-55
Author(s):  
Vanlal hruaia ◽  
◽  
Lal rinmuana ◽  
J Lalbiaknunga ◽  
Laldinfeli Ralte
Keyword(s):  
Phylogenetic Tree ◽  
Evolutionary Relationship ◽  
Cladistic Analysis ◽  
Morphological Characters ◽  
Flowering Plants ◽  
Morphological Features ◽  
Total Evidence ◽  
Pictorial Representation ◽  
Phenetic Analysis ◽  
Morphological Relationship

Euphorbiaceae is one of the largest family of flowering plants, in our study different species were collected from different localities of Mizoram, the collected specimens were studied and their morphological features noted. 34 genera of Euphorbiaceae s.l were used in the study. Cladistic analysis was performed in Mesquite software and Phenetic analysis was done in NTsys software. Both analyses produce a pictorial representation in a form of a tree; cladistic analysis produce phylogenetic tree (evolutionary relationship) while phenetic analysis produce phenogram (morphological relationship). The results of the aforementioned analyses were further analysed by total evidence technique and taxonomic congruence, a phylogenetic software PAUP is used for this purpose. The resultant trees were very different and comparison was done to find correlation between evolution and morphological characters. The research finds various correlation among characters like the number of locule in ovule, phyllanthoid branching and support the inclusion of genus like Breynia, Sauropus into Phyllanthus.

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