scholarly journals Enterobacteria in the 21st century: a review focused on taxonomic changes

2019 ◽  
Vol 13 (04) ◽  
pp. 265-273
Author(s):  
Soraya Morales-López ◽  
Jayr A Yepes ◽  
Juan C Prada-Herrera ◽  
Augusto Torres-Jiménez

Introduction: Enterobacteria are the main group causing infections in humans. The aim of this review is to present the new genera and the taxonomic changes that the Enterobacteriacea family has experienced in recent years. Methodology: a systematic search of papers published in databases from January 2000 to July 2018 was done. Additionally, the bibliographic references of each document were reviewed and each paper citing the article was reviewed in search of clinical cases. Results: Nineteen new genera of Enterobacteria have been described since 2000. The genera Yersinia, Morganella and Erwinia do not belong to the family Enterobacteriacea anymore. Conclusions: for an adequate clinical and epidemiological interpretation, it is advisable to update the libraries of the commercial systems used for the identification of the microorganisms, as well as to train the staff in the taxonomic changes of microorganisms.

Zootaxa ◽  
2019 ◽  
Vol 4656 (2) ◽  
pp. 384-388
Author(s):  
HAO XU ◽  
CHUNTIAN ZHANG ◽  
ZHIYUAN YAO

The genus Pholcus Walckenaer, 1805 belongs to the family Pholcidae C.L. Koch, 1850, which is a species-rich group, including 94 genera and 1,716 species (World Spider Catalog 2019). Pholcus is mainly distributed in the Palaearctic, Indo-Malayan, Afrotropical, and Australasian Region (Huber 2011). The only exception is the Pholcus kingi group with ten species in the southeastern USA (Huber 2011). The genus includes species from a wide range of habitats, e.g., between buttresses, in small holes or caves, among and under large rocks, or on the underside of green leaves (Huber 2011). Many taxonomic changes were implemented on the latest molecular phylogeny analyses (Eberle et al. 2018; Huber et al. 2018), including nine new genera resulted from splitting Pholcus: Cantikus Huber, 2018, Kelabita Huber, 2018, Kintaqa Huber, 2018, Meraha Huber, 2018, Muruta Huber, 2018, Paiwana Huber, 2018, Pribumia Huber, 2018, Teranga Huber, 2018, and Tissahamia Huber, 2018. The genus Sihala Huber, 2011 was synonymized with Pholcus and the species Pholcus agadir Huber, 2011 was moved to Micropholcus Deeleman-Reinhold & Prinsen, 1987 (Huber et al. 2018). Nevertheless, Pholcus continues to be the most species-rich genus in Pholcidae and currently includes 328 species belonging to 21 species-groups [previously: 393 species and 32 species-groups] (Huber 2011; Huber et al. 2018; World Spider Catalog 2019). One of the generic species-groups, the Pholcus nenjukovi species-group, contains eight species and occurs in northeastern Iran, Afghanistan, Tajikistan, and Russia (the single record of Pholcus sidorenkoi Dunin, 1994 from Russia is dubious, see Huber 2011: 339). In the present study, we describe a new species from southwestern Tibet, China assigned to the Pholcus nenjukovi species-group. This distribution represents the eastern most record for the species-group (Fig. 1). 


2019 ◽  
Vol 189 (1) ◽  
pp. 287-314
Author(s):  
Juan D Vásquez-Restrepo ◽  
Roberto Ibáñez ◽  
Santiago J Sánchez-Pacheco ◽  
Juan M Daza

Abstract The family Gymnophthalmidae is a highly diverse Neotropical lizard clade. Although multiple phylogenetic and taxonomic studies have reshaped our understanding of gymnophthalmid systematics and diversity, many groups remain understudied. This is the case for the cercosaurine genus Echinosaura, which includes eight species of small riparian lizards distributed across lower Central America and northern South America. Here, we present a comprehensive phylogenetic analysis of Echinosaura, including DNA data for all species of the genus for the first time. To rigorously test the relationships of all Echinosaura, we have assembled the largest molecular dataset of cercosaurine lizards to date. Our analysis refutes the monophyly of Echinosaura, with E. apodema and E. sulcarostrum not closely related to the remaining species. To remedy the polyphyly of Echinosaura, we describe two new genera for E. apodema and E. sulcarostrum. Morphological distinctiveness and biogeography further support these taxonomic changes. In light of our phylogenetic results, we review the species-level taxonomy of the redefined Echinosaura based on morphological and genetic variation. We resurrect E. centralis and designate a neotype given the absence of type and topotypic material. In addition, we provide taxonomic accounts for each species and analyse their patterns of geographic distribution.


ZooKeys ◽  
2019 ◽  
Vol 815 ◽  
pp. 1-114 ◽  
Author(s):  
Ryan A. St Laurent ◽  
Akito Y. Kawahara

A backbone molecular phylogeny of Mimallonidae, based on 47 species and 515 loci, was recently published. That study resolved some of the major relationships in the family, but taxon sampling was limited and a classification of the family was not formally presented for all species. Here morphological phylogenetic analyses in parsimony and maximum likelihood (ML) frameworks were conducted that included 192 species and 55 morphological characters. A phylogenetic analysis was also conducted on the morphological dataset with a topological constraint based on the 515 locus tree from the previous study. Results show that nearly all species can be confidently placed in a genus using morphological phylogenetics. The presence of a frenulum, a character that was historically used to distinguish major groups of Mimallonidae, varies within and among genera. Based on our phylogenetic results, the classification of Mimallonidae is revised, which now includes 291 species in 41 genera. Descriptions of three new genera are included: Fatellallagen. n., Citrallagen. n., and Lepismallagen. n. The following taxonomic changes were made in the present article: 43 new/revived combinations (in Aceclostria Vuillot, Arcinnus Herbin, Bedosia Schaus, Bedosiallo St Laurent & Kawahara, Cicinnus Blanchard, Citralla, Druentica Strand, Fatellalla, Lacosoma Grote, Lepismalla, Mimallo Hübner, Procinnus Herbin, Psychocampa Grote, Roelmana Schaus, and Thaelia Herbin), two new species-level synonyms (melini Bryk is synonymized with viemanda Schaus, jaruga Jones is synonymized with hamata Walker), one revived synonymy (roscida Dognin is resynonymized with externa Moore), seven new statuses (in Druentica, Macessoga Schaus, and Trogoptera Herrich-Schäffer), six revived statuses (in Aceclostria, Cicinnus, Druentica, Psychocampa, and Zaphanta Dyar), and one new designation of nomen nudum. In order to alleviate nomenclatural problems, twelve lectotypes are designated (for Tolypidaamaryllis (Schaus), Trogopteraalthora Schaus, Adalgisacroesa Schaus, Alheitapulloides (Dognin), LacosomabriasiaSchaus, Lacosomadiederica Schaus, Lacosomaraydela Schaus, Psychocampalacuna (Schaus), Cicinnuscorallina Dognin, Cicinnuslatris Schaus, Cicinnussolvens Schaus, Cicinnustuisana Schaus) as well as a neotype for Mimallodespecta Walker (= Cicinnusdespecta). This paper also provides apomorphies for each genus and a morphological key to genera. Annotations are given to aid researchers in understanding all changes made herein, and images of male and female and their genitalia are present for nearly all type species.


2011 ◽  
Vol 20 (1) ◽  
pp. 161-173
Author(s):  
A.P. Kassatkina

Resuming published and own data, a revision of classification of Chaetognatha is presented. The family Sagittidae Claus & Grobben, 1905 is given a rank of subclass, Sagittiones, characterised, in particular, by the presence of two pairs of sac-like gelatinous structures or two pairs of fins. Besides the order Aphragmophora Tokioka, 1965, it contains the new order Biphragmosagittiformes ord. nov., which is a unique group of Chaetognatha with an unusual combination of morphological characters: the transverse muscles present in both the trunk and the tail sections of the body; the seminal vesicles simple, without internal complex compartments; the presence of two pairs of lateral fins. The only family assigned to the new order, Biphragmosagittidae fam. nov., contains two genera. Diagnoses of the two new genera, Biphragmosagitta gen. nov. (type species B. tarasovi sp. nov. and B. angusticephala sp. nov.) and Biphragmofastigata gen. nov. (type species B. fastigata sp. nov.), detailed descriptions and pictures of the three new species are presented.


Phytotaxa ◽  
2015 ◽  
Vol 233 (3) ◽  
pp. 236 ◽  
Author(s):  
Roksana Majewska ◽  
J. P. Kociolek ◽  
Evan W. Thomas ◽  
Mario De Stefano ◽  
Mario Santoro ◽  
...  

Marine mammals such as whales and dolphins have been known for a long time to host a very specific epizoic community on their skin. Less known however is the presence of a similar community on the carapaces of sea turtles. The present study is the first describing new taxa inhabiting sea turtle carapaces. Samples, collected from nesting olive ridley sea turtles (Lepidochelys olivacea) on Ostional Beach (Costa Rica), were studied using light and scanning electron microscopy. Two unknown small-celled gomphonemoid taxa were analysed in more detail and are described as two new genera, closely related to other gomphonemoid genera with septate girdle bands, such as Tripterion, Cuneolus and Gomphoseptatum. Chelonicola Majewska, De Stefano & Van de Vijver gen. nov. has a flat valve face, uniseriate striae composed of more than three areolae, simple external raphe endings, internally a siliceous flap over the proximal raphe endings and lives on mucilaginous stalks. Poulinea Majewska, De Stefano & Van de Vijver gen. nov. has at least one concave valve, uniseriate striae composed of only two elongated areolae, external distal raphe endings covered by thickened siliceous flaps and lives attached to the substrate by a mucilaginous pad. Chelonicola costaricensis Majewska, De Stefano & Van de Vijver sp. nov. and Poulinea lepidochelicola Majewska, De Stefano & Van de Vijver sp. nov. can be separated based on stria structure, girdle structure composed of more than 10 copulae, raphe structure and general valve outline. A cladistics analysis of putative members of the Rhoicospheniaceae indicates that the family is polyphyletic. Chelonicola and Poulinea are sister taxa, and form a monophyletic group with Cuneolus and Tripterion, but are not closely related to Rhoicosphenia, or other genera previously assigned to this family. Features used to help diagnose the family such as symmetry and presence of septa and pseudosepta are homoplastic across the raphid diatom tree of life.


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