Genus

About: Genus is a research topic. Over the lifetime, 68921 publications have been published within this topic receiving 590966 citations. The topic is also known as: monospecies genus & genus (zoology).

Revision of the genus Glyphithyreus Reuss, 1859 (Crustacea, Decapoda, Brachyura, Xanthoidea) and recognition of a new genus

Abstract: The definition of the brachyuran genus Glyphithyreus Reuss, 1859 (= Plagiolophus Bell, 1858non Pomel, 1857) is herein restricted such that the genus now embraces four species ranging from Paleocene to Oligocene in age. Other species previously referred to the genus have been placed in other genera, resulting in one new genus, Chirinocarcinus, and four new combinations, Chirinocarcinus wichmanni ( Feldmannet al., 1995), Lobonotus sturgeoni ( Feldmannet al., 1995), Stintonius markgrafi ( Lőrenthey, 1907 [1909]), and Titanocarcinus bituberculatus ( Collins and Jakobsen, 2003). The referral of Glyphithyreus to the Panopeidae Ortmann, 1893, extends the range of that family into the Paleocene. The geographic range of Stintonius Collins, 2002, is extended from England to include Egypt as well.

The phylogeny and a new classification of the gingers (Zingiberaceae): evidence from molecular data.

Abstract: The pantropical Zingiberaceae is the largest family in the order Zingiberales with 53 genera and over 1200 species Classifications of the family first proposed in 1889 and refined by others since that time recognize four tribes (Globbeae, Hedychieae, Alpinieae, and Zingibereae) based on morphological features, such as number of locules and placentation in the ovary, development of staminodia, modifications of the fertile anther, and rhizome-shoot-leaf orientation New phylogenetic analyses based on DNA sequences of the nuclear internal transcribed spacer (ITS) and plastid matK regions suggest that at least some of these morphological traits are homoplasious and three of the tribes are paraphyletic The African genus Siphonochilus and Bornean genus Tamijia are basal clades The former Alpinieae and Hedychieae for the most part are monophyletic taxa with the Globbeae and Zingibereae included within the latter The results of these phylogenetic investigations are used to propose a new classification of the Zingiberaceae that recognizes four subfamilies and four tribes: Siphonochiloideae (Siphonochileae), Tamijioideae (Tamijieae), Alpinioideae (Alpinieae, Riedelieae), and Zingiberoideae (Zingibereae, Globbeae) Morphological features congruent with this classification and the taxonomic status of various monotypic genera are discussed

Toward a Novel Multilocus Phylogenetic Taxonomy for the Dermatophytes.

Abstract: Type and reference strains of members of the onygenalean family Arthrodermataceae have been sequenced for rDNA ITS and partial LSU, the ribosomal 60S protein, and fragments of β-tubulin and translation elongation factor 3. The resulting phylogenetic trees showed a large degree of correspondence, and topologies matched those of earlier published phylogenies demonstrating that the phylogenetic representation of dermatophytes and dermatophyte-like fungi has reached an acceptable level of stability. All trees showed Trichophyton to be polyphyletic. In the present paper, Trichophyton is restricted to mainly the derived clade, resulting in classification of nearly all anthropophilic dermatophytes in Trichophyton and Epidermophyton, along with some zoophilic species that regularly infect humans. Microsporum is restricted to some species around M. canis, while the geophilic species and zoophilic species that are more remote from the human sphere are divided over Arthroderma, Lophophyton and Nannizzia. A new genus Guarromyces is proposed for Keratinomyces ceretanicus. Thirteen new combinations are proposed; in an overview of all described species it is noted that the largest number of novelties was introduced during the decades 1920-1940, when morphological characters were used in addition to clinical features. Species are neo- or epi-typified where necessary, which was the case in Arthroderma curreyi, Epidermophyton floccosum, Lophophyton gallinae, Trichophyton equinum, T. mentagrophytes, T. quinckeanum, T. schoenleinii, T. soudanense, and T. verrucosum. In the newly proposed taxonomy, Trichophyton contains 16 species, Epidermophyton one species, Nannizzia 9 species, Microsporum 3 species, Lophophyton 1 species, Arthroderma 21 species and Ctenomyces 1 species, but more detailed studies remain needed to establish species borderlines. Each species now has a single valid name. Two new genera are introduced: Guarromyces and Paraphyton. The number of genera has increased, but species that are relevant to routine diagnostics now belong to smaller groups, which enhances their identification.