Systematics, Phylogeny, and Evolution of Phrynocephalus (Superspecies przewalskii) (Reptilia: Agamidae)

2021 ◽  
Vol 28 (1) ◽  
pp. 43-59
Author(s):  
Evgeny A. Dunayev ◽  
Evgeniya N. Solovyeva ◽  
Nikolay A. Poyarkov
Keyword(s):  
Mitochondrial Dna ◽  
Taxonomic Status ◽  
The Body ◽  
Type Specimens ◽  
Gene Coi ◽  
Body Patterns ◽  
Diagnostic Key ◽  
Phylogeny And Evolution

The superspecies przewalskii group of Phrynocephalus includes several taxa with unclear taxonomic status. We analyze a fragment of the mitochondrial DNA gene COI and the body patterns of 275 specimens including type specimens. The results resolve the taxonomy and phylogeny of the group and we provide a diagnostic key for the species.

scholarly journals Breeding of the Gull-billed Tern in the Sahara and an update on its distribution in Algeria

2020 ◽  
pp. 106-112
Author(s):  
Oussama Bouarakia ◽  
Christiane Denys ◽  
Violaine Nicolas ◽  
Touria Benazzou ◽  
Abdelaziz Benhoussa
Keyword(s):  
Mitochondrial Dna ◽  
Cytochrome B ◽  
Genetic Characterization ◽  
Taxonomic Status ◽  
The Body ◽  
Gene Analysis ◽  
Molecular Tools ◽  
Skull Measurements ◽  
Species Being

The taxonomic status of the gerbil Gerbillus amoenus in relation to Gerbillus nanus and the distribution range of these two species in Africa and/or Asia have long been debated and are not yet fully clarified. In our study, we identify two specimens of small gerbils that we captured in two localities of the south of Morocco, using morphometric and/or molecular tools. The body and skull measurements were not able to unambiguously discriminate between three closely related small gerbils (Gerbillus amoenus, Gerbillus nanus and Gerbillus henleyi). However, the cytochrome b gene analysis showed that our two specimens cluster unambiguously with haplotypes of G. amoenus. This represents the first genetic characterization of G. amoenus in Morocco. It confirms, based on mitochondrial DNA, that the previously described species living in Africa is indeed G. amoenus and not G. nanus, the latter species being present strictly in Asia.

scholarly journals The Role of Mitochondria in Carcinogenesis

2021 ◽  
Vol 22 (10) ◽  
pp. 5100
Author(s):  
Paulina Kozakiewicz ◽  
Ludmiła Grzybowska-Szatkowska ◽  
Marzanna Ciesielka ◽  
Jolanta Rzymowska
Keyword(s):  
Prostate Cancer ◽  
Mitochondrial Dna ◽  
Nuclear Dna ◽  
Dna Polymorphisms ◽  
Gene Encoding ◽  
Dna Mutations ◽  
Nadh Ubiquinone Oxidoreductase ◽  
Gene Coi ◽  
The Impact

The mitochondria are essential for normal cell functioning. Changes in mitochondrial DNA (mtDNA) may affect the occurrence of some chronic diseases and cancer. This process is complex and not entirely understood. The assignment to a particular mitochondrial haplogroup may be a factor that either contributes to cancer development or reduces its likelihood. Mutations in mtDNA occurring via an increase in reactive oxygen species may favour the occurrence of further changes both in mitochondrial and nuclear DNA. Mitochondrial DNA mutations in postmitotic cells are not inherited, but may play a role both in initiation and progression of cancer. One of the first discovered polymorphisms associated with cancer was in the gene NADH-ubiquinone oxidoreductase chain 3 (mt-ND3) and it was typical of haplogroup N. In prostate cancer, these mutations and polymorphisms involve a gene encoding subunit I of respiratory complex IV cytochrome c oxidase subunit 1 gene (COI). At present, a growing number of studies also address the impact of mtDNA polymorphisms on prognosis in cancer patients. Some of the mitochondrial DNA polymorphisms occur in both chronic disease and cancer, for instance polymorphism G5913A characteristic of prostate cancer and hypertension.

Study on the origin and taxonomic status of yak (Poephagus) using cytochrome b gene of mitochondrial DNA

2007 ◽  
Vol 1 (3) ◽  
pp. 329-333 ◽  
Author(s):  
Qifa Li ◽  
Yinxia Li ◽  
Xingbo Zhao ◽  
Zhenshan Liu ◽  
Yefen Xu ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Cytochrome B ◽  
Taxonomic Status ◽  
Cytochrome B Gene

Redescriptions of North American Epidamaeus (Acari, Oribatida, Damaeidae) species proposed by N. Banks, H.E. Ewing, A.P. Jacot, and J.W. Wilson

Zootaxa ◽  
2021 ◽  
Vol 5021 (1) ◽  
pp. 1-65
Author(s):  
ROY A. NORTON ◽  
SERGEY G. ERMILOV
Keyword(s):  
New Hampshire ◽  
Oribatid Mite ◽  
Eastern North America ◽  
Type Specimens ◽  
Early American ◽  
Eastern Usa ◽  
Diagnostic Key ◽  
First Time ◽  
Mite Genus ◽  
Subjective Synonym

Early American acarologists proposed several species that have been recombined to the oribatid mite genus Epidamaeus (Damaeidae), but none has been redescribed to modern standards. These include E. puritanicus (Banks, 1906), E. michaeli (Ewing, 1909), E. globifer (Ewing, 1913), E. florida (Wilson, 1936), E. olitor (Jacot, 1937), and E. craigheadi (Jacot, 1939). We redescribe and illustrate these species, based on available type specimens and other material in various collections, and give an indication of their overall distributions. Juvenile instars are at least partly described for all except E. florida and E. olitor. Since these six collectively include the most encountered Epidamaeus species in the eastern USA, a diagnostic key is presented that also includes E. arcticola (Hammer, 1952), which is reliably recorded from eastern North America (New Hampshire) for the first time. A neotype is selected for E. michaeli, which is considered a senior subjective synonym of E. canadensis (Banks, 1909) [new syn.]. Synonymy of E. puritanicus with E. grandjeani (Bulanova-Zachvatkina, 1957) is rejected.  

Systematic position of the Afrotropical species described in Trachyphloeini (Coleoptera: Curculionidae: Entiminae)

Zootaxa ◽  
2017 ◽  
Vol 4344 (3) ◽  
pp. 522 ◽  
Author(s):  
ROMAN BOROVEC ◽  
JIŘÍ SKUHROVEC
Keyword(s):  
New Species ◽  
Taxonomic Status ◽  
Systematic Position ◽  
Junior Synonym ◽  
New Genera ◽  
Type Specimens ◽  
A New Species

The Afrotropical species described as Trachyphloeini Lacordaire, 1863 were examined and their taxonomic status is revised. Atrachyphloeus Voss, 1962 is proposed as a junior synonym of Phaylomerinthus Schoenherr, 1842, Cathormiocerus africanus Hoffmann, 1965 as a junior synonym of Tapinomorphus sylvicola Voss, 1962 and Trachyphloeus pustulifer Voss, 1959 as a junior synonym of Platycopes tuberculatus Marshall, 1906. Atrachyphloeus convergens Voss, 1962 is transferred to the genus Phaylomerinthus Schoenherr, 1842, Trachyphloeus hardenbergi Marshall, 1923 and T. notulatus Boheman, 1842 to Glyptosomus Schoenherr, 1847, Trachyphloeus nanus Fåhraeus, 1871 to Pentatrachyphloeus Voss, 1974, Trachyphloeus pustulifer Voss, 1959 to Platycopes Schoenherr, 1823 and Trachyphloeus setiger Fåhraeus, 1871 to Phaylomerinthus Schoenherr, 1842. “Trachyphloeosoma” brevicolle Voss, 1974, “Trachyphloeus” brevis Boheman, 1842, “T”. nodifrons Hoffmann, 1968 and “T”. squalidus Boheman, 1842 are provisionally left in their current genera, but new genera for them will be described in future papers. The genus Phaylomerinthus Schoenherr, 1842 has been redefined and redescribed. Lectotypes for the following species are designated (current names added in brackets where different): Cathormiocerus africanus Hoffmann, 1965 (Tapinomorphus sylvicola Voss, 1962), Trachyphloeus hardenbergi Marshall, 1923 (Glyptosomus hardenbergi (Marshall, 1923)), Trachyphloeus nanus Fåhraeus, 1871 (Pentatrachyphloeus nanus (Fåhraeus, 1871)), Trachyphloeus notulatus Boheman, 1842 (Glyptosomus notulatus (Boheman, 1842)), Trachyphloeus pustulifer Voss, 1959 (Platycopes tuberculatus (Marshall, 1906)), Trachyphloeus setiger Fåhraeus, 1871 (Phaylomerinthus setiger (Fåhraeus, 1871)), “Trachyphloeus” brevis Boheman in Schoenherr, 1842 and “Trachyphloeus” squalidus Boheman in Schoenherr, 1842. Two paralectotypes of Cathormiocerus africanus Hoffmann, 1965 from Tanzania are described as a new species, Tapinomorphus franzi sp. n. All type specimens are illustrated. 

scholarly journals Morphology and sexual dimorphism of living mature adults of Amphiduros fuscescens (Marenzeller, 1875) (Annelida, Hesionidae, Amphidurine), first reported for the Iberian Peninsula

2021 ◽  
Vol 9 ◽  
Author(s):  
Daniel Martin ◽  
Chiara Romano
Keyword(s):  
Sexual Dimorphism ◽  
Iberian Peninsula ◽  
Taxonomic Status ◽  
Single Species ◽  
First Record ◽  
The Body ◽  
Valid Species ◽  
Mature Adults ◽  
Nw Mediterranean ◽  
Cryptic Species Complex

To date, the genus Amphiduros (Annelida: Hesionidae: Amphidurine) is considered as monotypic. Its single species, Amphiduros fuscescens (Marenzeller, 1875), is well characterised by lacking proboscideal papillae and emerging acicular chaetae, as well as by having three antennae, eight pairs of tentacular cirri and inflated dorsal cirri with characteristic alternating length and colour (transparent, with median orange band and white tips) in live animals. Three specimens, one male and two females, were found below boulders at 5–7 m depth in Punta Santa Anna, Blanes and Cala Maset, Sant Feliu de Guixols (Catalan Sea, NW Mediterranean, Iberian Peninsula). Our finding allowed us to describe different, unreported morphological traits and lead us to support the existence of sexual dimorphism (in terms of colouring, cirri morphology and distribution of sexual products along the body). Despite A. fuscescens having been previously reported from the Atlantic and the Mediterranean (particularly in SE French coasts), the specimens from Blanes represent the first record of the species from the Iberian Peninsula. In addition, our molecular results strongly support that Amphiduros pacificus Hartman, 1961 from California (currently synonymised with A. fuscescens) requires to be re-described and reinstalled as a valid species. In turn, our morphological observations support suggesting all other non-Mediterranean reports of A. fuscescens, including the species still under synonymy (i.e. Amphidrornus izukai Hessle, 1925 and Amphidromus setosus Hessle, 1925) as likely being a cryptic species complex whose the taxonomic status requires further assessment.

Species relationships in the dasyurid marsupial genus Pseudantechinus (Marsupialia : Dasyuridae): a re-examination of the taxonomic status of Pseudantechinus roryi

2017 ◽  
Vol 65 (4) ◽  
pp. 240 ◽  
Author(s):  
L. S. Umbrello ◽  
P. A. Woolley ◽  
M. Westerman
Keyword(s):  
Dna Sequences ◽  
Isolation By Distance ◽  
Phylogenetic Analyses ◽  
Mitochondrial Gene ◽  
Taxonomic Status ◽  
Museum Collections ◽  
Species Relationships ◽  
Type Specimens ◽  
Network Analyses ◽  
The Status

The status of Pseudantechinus roryi relative to its congeners has been determined from DNA sequences obtained from both nuclear and mitochondrial gene loci. Although all other recognised species of Pseudantechinus form reciprocally monophyletic lineages in phylogenetic analyses, individuals identified in museum collections as Ps. roryi (including type specimens) were indistinguishable from those identified as Ps. macdonnellensis. Ps. roryi is thus considered to be a synonym of Ps. macdonnellensis. Neighbour-joining network analyses failed to reveal any clear biogeographic differences between populations of Ps. macdonnellensis other than some evidence of isolation by distance.

The Vietnamese population of Megophrys kuatunensis (Amphibia: Megophryidae) represents a new species of Asian horned frog from Vietnam and southern China

Zootaxa ◽  
2017 ◽  
Vol 4344 (3) ◽  
pp. 465 ◽  
Author(s):  
BENJAMIN TAPLEY ◽  
TIMOTHY CUTAJAR ◽  
STEPHEN MAHONY ◽  
CHUNG THANH NGUYEN ◽  
VINH QUANG DAU ◽  
...  
Keyword(s):  
New Species ◽  
Southern China ◽  
Phylogenetic Analyses ◽  
Eastern China ◽  
Taxonomic Status ◽  
Species Group ◽  
Type Specimens ◽  
Vietnamese Population ◽  
Group A ◽  
A New Species

The Asian frog genus Megophrys is a diverse group of morphologically conserved, forest-dwelling frogs. The genus harbours highly localised species diversification and new species continue to be described on a regular basis. We examined the taxonomic status of a population of Megophrys frogs from the Hoang Lien Range in northern Vietnam and southern China previously identified as M. kuatunensis (subgenus Panophrys). Preliminary phylogenetic analyses using a fragment of 16S rDNA places the species in question within the Megophrys (subgenus Panophrys) species group, a primarily Chinese radiation within the genus. On the basis of morphological, molecular and bioacoustic data, we conclude that this population does not represent M. kuatunensis, or any known species in the genus. We herein describe this species of Megophrys as new. Known only from Sa Pa District, Lao Cai Province in Vietnam and Jinping County, Yunnan Province in China, the new species is likely to be threatened by ongoing deforestation in the region. We provide an updated species description of M. kuatunensis based on type specimens, and suggest that M. kuatunensis is likely to be restricted to eastern China.  

Description of nymph of Brasilocaenis atawallpa Lima, Molineri, Vieira, Pinheiro & Salles, 2019 (Ephemeroptera: Caenidae) and notes on its taxonomic status

Zootaxa ◽  
2021 ◽  
Vol 5027 (1) ◽  
pp. 136-144
Author(s):  
STÊNIO R. S. NASCIMENTO ◽  
PAULO V. CRUZ ◽  
MYLLENA S. L. SILVA ◽  
VIVIANE C. FIRMINO ◽  
LEANDRO S. BRASIL ◽  
...  
Keyword(s):  
Male Genitalia ◽  
Cladistic Analysis ◽  
Taxonomic Status ◽  
Original Description ◽  
Type Specimens ◽  
Nymphal Stage ◽  
Type Series ◽  
Colombian Amazon ◽  
Fore Coxa

Brasilocaenis atawallpa was recently described based on male imago from Colombian Amazon. The original description does not contain a designation of type specimens or locality, and it just states that the type series was studied in order to perform the cladistic analysis. In this context, we herein designate the lectotype and paralectotypes of B. atawallpa and describe its nymphal stage. The nymphs were associated to B. atawallpa by the male genitalia extracted from mature nymphs. The nymphal stage of B. atawallpa can be differentiated from others known nymphs of the genus by absence of pointed microspines on opercular gill, fore coxa without projection, middle coxa with well-developed and semicircular projection, hind coxa with finger-like projection, fore and middle tarsal claws without denticles and hind margin of the ninth sternite almost straight.  

Sign in / Sign up

Export Citation Format

Share Document