scholarly journals Corrigendum: Generic rank of Betti map and unlikely intersections

2021 ◽  
Vol 157 (12) ◽  
pp. 2747-2748
Author(s):  
Ziyang Gao
Keyword(s):  
Generic Rank

System of generic groups in mealybugs (Homoptera: Coccinea: Pseudococcidae)

2015 ◽  
Vol 24 (2) ◽  
pp. 236-259 ◽  
Author(s):  
I.A. Gavrilov-Zimin
Keyword(s):  
Taxonomic Revision ◽  
Generic Rank ◽  
The World ◽  
Generic Groups ◽  
World Fauna

The paper provides a brief conspectus of the system of morphological generic groups, elaborated earlier by the author basing on the total taxonomic revision of Palaearctic mealybugs. Here the system is complemented by the analysis of all 249 genera of the world fauna. Borders of two generic groups are reconsidered and two else groups (with mainly Oriental and Australasian genera) are included in the system. Main taxonomic characters of generic rank are discussed and illustrated.

Aspidisca beringiana sp. nov. and Simbiodisca subgen. nov. (Ciliophora, Euplotida), a symbiont of terebellid polychaetes in the Bering Sea

2009 ◽  
Vol 18 (2) ◽  
pp. 184-190
Author(s):  
A.W. Jankowski
Keyword(s):  
Bering Sea ◽  
Tidal Zone ◽  
Generic Rank ◽  
New Subgenus ◽  
Bering Island ◽  
The Bering Sea

Terebellids in tidal zone of the Bering Island bear three new symbionts - rhabdophryid suctorians, peritrichs with small rosette-like colonies and aspidiscid hypotrich with a long peristome parallel to left body margin. This is the main feature of a new subgenus of the genus Aspidisca, named Simbiodisca. It may deserve the full generic rank if the use of protargol silvering method will not reveal any upper left rudiment of the peristomal membranelles.

The larva of Psychoda (Philosepedon) humeralis Meigen (Diptera, Psychodidae)

Parasitology ◽  
1963 ◽  
Vol 53 (1-2) ◽  
pp. 155-156
Author(s):  
Kenneth G. V. Smith ◽  
L. W. Grensted
Keyword(s):  
Larval Stage ◽  
Sensu Stricto ◽  
Present Account ◽  
Generic Rank ◽  
Detailed Treatment

Satchell (1947) described and keyed the larvae of 14 of the 19 British species of Psychoda, but this study did not include P. humeralis Mg., presumably because the author accorded generic rank to Philosepedon and Threticus which would put them outside his study of Psychoda sensu stricto. The larva of P. humeralis has been briefly described by Spärck (1920), but his figures are rather crude. A detailed treatment of the larval head is given by Anthon (1943). The present account is offered to facilitate identification of this species in the larval stage when used in conjunction with Satchell's comprehensive paper.

Revision of European and North African Folsomides Stach with special emphasis on the Canarian fauna (Collembola: Isotomidae)

1992 ◽  
Vol 23 (4) ◽  
pp. 453-473 ◽  
Author(s):  
Arne Fjellberg
Keyword(s):  
New Species ◽  
Canary Islands ◽  
Morphological Characters ◽  
Maxillary Palp ◽  
North African ◽  
African Species ◽  
Mouth Region ◽  
Generic Rank ◽  
Number Of Species ◽  
Narrow Definition

AbstractThe genus Folsomides Stach, 1922 is redefined and given a narrow definition based on a limited set of consistent morphological characters: Position and distribution of tergal macrosensilla, chaetotaxy of mouth region, tibiotarsi, ventral tube and furca. Eighteen new species are described from the Canary Islands: semiparvulus sp. n., xerophilus sp. n., vinosus sp. n., cumbrosus sp. n., unicus sp. n., terrus sp. n., pocosensillatus sp. n., nigrocellatus sp. n., teno sp. n., oromii sp. n., ononicolus sp. n., graminis sp. n., famarensis sp. n., pinicolus sp. n., intermedius sp. n., tonellus sp. n., supranubius sp. n. and analuisae sp. n. The following European/African species are redescribed: parvulus Stach, portucalensis Gama, angularis (Axelson), cf. petiti Delamare, lawrencei Gers & Deharveng, cf. zairensis Martynova, nanus Ellis and centralis (Denis). Highly discriminate species characters are found in maxillary palp, tibiotarsal chaetotaxy and distribution of tergal microsensilla. A number of species are removed from Folsomides, and Subisotoma Stach, 1947 is given generic rank.

Comments on finding the generic rank of a structural matrix

1978 ◽  
Vol 23 (3) ◽  
pp. 509-510 ◽  
Author(s):  
M. Morari ◽  
G. Stephanopoulos
Keyword(s):  
Generic Rank ◽  
Structural Matrix

Foliar architecture of some members of the tribe Senecioneae (Asteraceae) with a key for identification of the Mexican genera

Phytotaxa ◽  
2018 ◽  
Vol 364 (2) ◽  
pp. 136
Author(s):  
ALICIA ROJAS-LEAL ◽  
TERESA TERRAZAS ◽  
JOSÉ LUIS VILLASEÑOR
Keyword(s):  
Identification Key ◽  
Leaf Architecture ◽  
Leaf Venation ◽  
Generic Rank ◽  
Secretory Canals

The foliar architecture of 18 genera (Barkleyanthus, Digitacalia, Erechtites, Nelsonianthus, Packera, Pentacalia, Pippenalia, Pittocaulon, Psacaliopsis, Psacalium, Pseudogynoxys, Robinsonecio, Roldana, Senecio, Telanthophora, Tetradymia, Villasenoria and Werneria) of the tribe Senecioneae (Asteraceae) distributed in Mexico is described. The aim was to identify leaf characters to be used in the taxonomy and phylogenetics of the tribe, as well as a source to identify at the generic rank the genera distributed in Mexico. More than 400 specimens were revised and several leaves were cleared to analyze leaf venation patterns. Four patterns of primary venation (actinodromous suprabasal, paralelodromous, pinnate and radiate-palmate) and five patterns of secondary venation (brochidodromous, weak-brochidodromous, craspedodromous, mixed-craspedodromous and festooned-semi-craspedodromous) were identified. Terminal tracheids were observed only in veinlets of Pentacalia, Pseudogynoxys and Werneria. In addition, secretory canals and crystals occurred in several genera. Foliar architecture showed to be a useful tool to identify genera, an identification key based mostly on leaf architecture characters is provided.

scholarly journals Sign Characteristics of Regular Hermitian Matrix Pencils under Generic Rank-1 and Rank-2 Perturbations

2015 ◽  
Vol 30 ◽  
pp. 760-794 ◽  
Author(s):  
Leonhard Batzke
Keyword(s):  
Canonical Form ◽  
Hermitian Matrix ◽  
Structure Preserving ◽  
Spectral Behavior ◽  
Generic Rank ◽  
Jordan Structure ◽  
Matrix Pencils ◽  
Rank 2 ◽  
Infinite Blocks

The spectral behavior of regular Hermitian matrix pencils is examined under certain structure-preserving rank-1 and rank-2 perturbations. Since Hermitian pencils have signs attached to real (and infinite) blocks in canonical form, it is not only the Jordan structure but also this so-called sign characteristic that needs to be examined under perturbation. The observed effects are as follows: Under a rank-1 or rank-2 perturbation, generically the largest one or two, respectively, Jordan blocks at each eigenvalue lambda are destroyed, and if lambda is an eigenvalue of the perturbation, also one new block of size one is created at lambda. If lambda is real (or infinite), additionally all signs at lambda but one or two, respectively, that correspond to the destroyed blocks, are preserved under perturbation. Also, if the potential new block of size one is real, its sign is in most cases prescribed to be the sign that is attached to the eigenvalue lambda in the perturbation.

scholarly journals Overview and revision of the extant genera and subgenera of Trogidae (Coleoptera: Scarabaeoidea)

2016 ◽  
Vol 47 (1) ◽  
pp. 53-82 ◽  
Author(s):  
Werner P. Strümpher ◽  
Martin H. Villet ◽  
Catherine L. Sole ◽  
Clarke H. Scholtz
Keyword(s):  
Molecular Phylogeny ◽  
Endemic Species ◽  
Strong Support ◽  
Morphological Characters ◽  
New Combinations ◽  
Genus Level ◽  
Generic Rank ◽  
The Family ◽  
Taxonomic Changes

Extant genera and subgenera of the Trogidae (Coleoptera: Scarabaeoidea) are reviewed. Contemporary classifications of this family have been based exclusively on morphological characters. The first molecular phylogeny for the family recently provided strong support for the relationships between morphologically defined genera and subgenera. On the basis of morphological, molecular and biogeographical evidence, certain taxonomic changes to the genus-level classification of the family are now proposed. The family is confirmed as consisting of two subfamilies, Omorginae Nikolajev and Troginae MacLeay, the former with two genera,OmorgusErichson andPolynoncusBurmeister, and the latter with two genera,TroxFabricius andPhoberusMacLeaystat. rev.Phoberusis restored to generic rank to include all Afrotropical (including Madagascan endemic) species;Afromorgusis confirmed at subgeneric rank within the genusOmorgus; and the monotypic Madagascan genusMadagatroxsyn. n.is synonymised withPhoberus.The current synonymies ofPseudotroxRobinson (withTrox),ChesasBurmeister,LagopelusBurmeister andMegalotroxPreudhomme de Borre (all withOmorgus) are all accepted to avoid creating speculative synonyms before definitive phylogenetic evidence is available. New combinations resulting from restoringPhoberusto a monophyletic genus are listed in Appendix A.

The beetle (Coleoptera) fauna of the Insect Limestone (late Eocene), Isle of Wight, southern England

2019 ◽  
Vol 110 (3-4) ◽  
pp. 405-492 ◽  
Author(s):  
Alexander G. KIREJTSHUK ◽  
Alexander G. PONOMARENKO ◽  
Andrey S. KUROCHKIN ◽  
Anatoly V. ALEXEEV ◽  
Vadim G. GRATSHEV ◽  
...  
Keyword(s):  
Late Eocene ◽  
Close Relative ◽  
Fossil Species ◽  
Isle Of Wight ◽  
Southern England ◽  
Generic Rank ◽  
New Subgenus ◽  
Fossil Records ◽  
Faunistic Composition

ABSTRACTA review of the faunistic composition of the coleopterous taphocenoses from Bembridge Marls is given. Only two families (Cupedidae and Carabidae) have been recorded from this site before. A total of 31 families have been revealed and determined in the course of the recent study, and 42 species have been described:Agabus latissimusPonomarenko, sp. nov. andIlybius gratsheviPonomarenko, sp. nov. from Dytiscidae;Neothanes europaeusPonomarenko, sp. nov. from Carabidae;Spercheus punctatusPonomarenko, sp. nov.,Spercheus wightensisPonomarenko, sp. nov. from Spercheidae,Hydrochara woodwardiPonomarenko & Soriano, sp. nov. andBerosus barclayiPonomarenko & Soriano, sp. nov. from Hydrophilidae;Ochthebius rossiKirejtshuk, sp. nov.,Eolimnebius fossilisKirejtshuk, sp. nov.,Hydraenites gracilimmusKirejtshuk, sp. nov.,Metacoxites ventritalisKirejtshuk, sp. nov.,Davidraenites gratsheviKirejtshuk, sp. nov.,D. interruptusKirejtshuk, sp. nov. andD. spurcusKirejtshuk, sp. nov. from Hydraenidae;Aphodius vectisKrell, sp. nov. andPentodon dorcusKrell, sp. nov. from Scarabaeidae;Scirtes calcariferensKirejtshuk & Ponomarenko, sp. nov.,Scirtes khnzoryaniKirejtshuk & Ponomarenko, sp. nov.,Scirtes metepisternalisKirejtshuk & Ponomarenko, sp. nov.,Scirtes wightensisKirejtshuk & Ponomarenko, sp. nov.,Contacyphon insularisKirejtshuk & Ponomarenko, sp. nov.,Contacyphon involutusKirejtshuk & Ponomarenko, sp. nov. andContacyphon kozloviKirejtshuk & Ponomarenko, sp. nov. from Scirtidae;Eucinetes nikolaevaeKirejtshuk & Ponomarenko, sp. nov. from Eucinetidae;Macropunctum rossiAlexeev, sp. nov. from Elateridae;Byrrhites bembridgensisKirejtshuk, sp. nov. from Byrrhidae;Paralichas striatopunctatusKirejtshuk, sp. nov. from Ptilodactylidae;Trixagus barclayiKirejtshuk, sp. nov. from Throscidae;Themus(?Telephorops)polyakiKirejtshuk, sp. nov. from Cantharidae;Attalus flexusKirejtshuk, sp. nov. from Malachiidae;Epuraea(Epuraea)kozloviKirejtshuk & Kurochkin, sp. nov.,Phenolia(Lasiodites)vanescensKirejtshuk & Kurochkin, sp. nov.,Prometopia europaeaKirejtshuk & Kurochkin, sp. nov.,Cyllodes argutusKirejtshuk & Kurochkin, sp. nov. andCoxollodes palaeogenicusKirejtshuk & Kurochkin, sp. nov. from Nitidulidae;Telmatophilus britannicusKirejtshuk & Kurochkin, sp. nov. from Cryptophagidae;Corticariites kozloviKirejtshuk, sp. nov. from Latridiidae;Orthoperites antiquusKirejtshuk & Kurochkin, sp. nov. from Corylophidae;Octotemnites sepultusKirejtshuk, sp. nov. from Ciidae;Cyclodinus efficaxKirejtshuk, sp. nov. from Anthicidae; andPlateumaris robustusKurochkin & Kirejtshuk, sp. nov.,Plateumaris rubiconisKurochkin & Kirejtshuk, sp. nov. andPlateumaris wightensisKurochkin & Kirejtshuk, sp. nov. from Chrysomelidae.ByrrhitesKirejtshuk, gen. nov.,CorticariitesKirejtshuk, gen. nov.,DavidraenitesKirejtshuk, gen. nov.,EolimnebiusKirejtshuk, gen. nov.,HydraenitesKirejtshuk, gen. nov.,MetacoxitesKirejtshuk, gen. nov.,OctotemnitesKirejtshuk, gen. nov. andOrthoperitesKirejtshuk & Kurochkin, gen. nov. are proposed as taxa, partly as formal ones with generic rank and include species described herein. ForPlateumaris rubiconissp. nov., a new subgenusNecrodexisKurochkin & Kirejtshuk, subgen. nov. is proposed. A brief review of the published fossil records for the groups considered in the paper is made. The probable ecological circumstances of the lives of the groups and species considered are discussed in the paper, and comparison with other Palaeogene sites and some conclusions on probable climatic circumstances have been elaborated. The taxonomic interpretation of three fossil species from the Caenozoic is reconsidered. It is shown that the genusMiocyphonWickham, 1914 can be scarcely regarded as a close relative of representatives of either Dascillidae or Scirtidae. ‘Phenolia'incapaxScudder, 1890 andLithomacratriaWickham, 1914 are regarded here without family attribution, the first as a member of Cucujiformia (i.e., out of Nitidulidae) and the latter as a member of the superfamily Tenebrionoidea (i.e., out of both Anthicidae and Pyrochroidae).

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