Torgania coronata gen. et sp. nov.: a new needle-shaped genus, with comments on the raphe system as a diagnostic character in Eunotiales (Ochrophyta, Bacillariophyceae)

2020 ◽  
pp. 1-12
Author(s):  
Luís Gustavo C. Canani ◽  
Dávia M. Talgatti ◽  
Sérgio Melo
Keyword(s):  
Diagnostic Character

A new, giant ricinuleid (Arachnida, Ricinulei), from the Pennsylvanian of Illinois, and the identification of a new, ontogenetically stable, diagnostic character

2020 ◽  
pp. 1-12
Author(s):  
Niall Whalen ◽  
Paul Selden
Keyword(s):  
Body Size ◽  
Statistical Analyses ◽  
Diagnostic Character ◽  
Single Specimen

Abstract A new fossil ricinuleid, Curculioides bohemondi n. sp., from the Pennsylvanian Energy Shale of Illinois is described from a single specimen. It is the largest ricinuleid species yet described, living or extinct. The Energy Shale represents a new geographic locale for fossil ricinuleids, a sparsely distributed group. The species is distinguished from other members within the genus by the possession of very large (0.09 mm) carapace tubercles at a very low (30 mm-2) density. Statistical analyses are performed on extant and fossil ricinuleids to determine how their tubercles change throughout ontogeny, culminating in the recovery of a new ontogenetically stable diagnostic character: the tubercle coefficient (a measure of the size of the tubercles relative to body size). UUID: http://zoobank.org/aa9f2de5-c49d-4f70-bba5-db12fdee406f.

Analysis of Turee Microscopic Cuaracters for Separating the Wood of Pinus Contorta and P. Ponderosa

IAWA Journal ◽  
2003 ◽  
Vol 24 (3) ◽  
pp. 257-267
Author(s):  
Alex C. Wiedenhoeft ◽  
Regis B. Miller ◽  
Terra J. Theim
Keyword(s):  
Pinus Ponderosa ◽  
Pinus Contorta ◽  
Resin Canal ◽  
Diagnostic Character ◽  
Resin Canals

Three microscopic characters were evaluated for the identification of Pinus contorta and Pinus ponderosa. The tangential diameter of the resin canals, including the epithelium, was compared to the tangential diameter of the entire resin canal complex. The latter measurement was shown to give diagnostic results for these species. Data from the examination of ray composition do not support previously published methods for separating P. contorta and P. ponderosa. The presence or absence of small elongate crystals in the subsidiary parenchyma of the resin canal complexes was shown to be the most powerful diagnostic character for separating the wood of these species.

Taxonomic and functional significance of the presternal area in Haemogamasus mites (Acari-Mesostigmata: Laelapidae), with a revised key to Fennoscandian species

1990 ◽  
Vol 21 (3) ◽  
pp. 329-337
Author(s):  
Lars Lundqvist
Keyword(s):  
Functional Significance ◽  
Posterior Wall ◽  
Species Level ◽  
Diagnostic Character ◽  
Adult Females

AbstractThe presternal area is described for adult females and males of the eight Scandinavian species of the genus Haemogamasus. This area contains suture lines with more or less conspicuous denticles. The denticles cover the posterior wall of the postcapitular furrow and probably act as a barrier to overflow of liquid accumulation during feeding. The presence of denticles in the presternal area may be correlated with, and an extension of, the elaboration of rows of deutosternal denticles on the ventral face of the subcapitulum. The configuration of the denticles can be used as a diagnostic character at the species level. Keys to the species, based on this character as well as others of adult females and males, are given.

scholarly journals Helicometrina nimia Linton, 1910 (Digenea: Opecoelidae) in dusky grouper Epinephelus marginatus (Lowe, 1834) (Teleostei: Serranidae) from southeastern Brazil

2014 ◽  
Vol 74 (2) ◽  
pp. 472-479 ◽  
Author(s):  
K. Roumbedakis ◽  
NC. Marchiori ◽  
P. Garcia ◽  
J Pereira Junior ◽  
LAS. Castro ◽  
...  
Keyword(s):  
Taxonomic Status ◽  
Wide Distribution ◽  
Sao Paulo ◽  
Diagnostic Character ◽  
Southeastern Brazil ◽  
Diagnostic Features ◽  
New Host ◽  
Paulo State ◽  
Dusky Grouper ◽  
São Paulo State

Helicometrina nimia (Opecoelidae) is a digenean with wide distribution. Fish families most commonly used as hosts for H. nimia are Serranidae, Pomodasydae, Scorpaenidae and Clinidae. In the present study, a new host and a new host locality are presented for the species. A description of the studied specimens, besides comments concerning its taxonomic status and biometrically compared tables of H. nimia reports are given. The taxonomic status of members of Helicometrina has been questionable. The greatest controversy for the genus seems to be related to the validity of diagnostic features, especially in regard to the number of testes. In the present study, all studied specimens presented a permanent and steady number of testes (n=9) and therefore its use as a diagnostic character is supported by the present authors. Epinephelus marginatus is considered a new host for Helicometrina nimia, and São Paulo state, southeastern Brazil, a new locality for the species.

scholarly journals Formation of Pattern and Diagnostic Instar Features of the Head in Caterpillars from Genus Peridea (Lepidoptera, Notodontidae)

2009 ◽  
Vol 43 (1) ◽  
pp. e-15-e-24
Author(s):  
I. Dolinskaya
Keyword(s):  
Pattern Formation ◽  
Larval Instar ◽  
Head Capsule ◽  
Diagnostic Character ◽  
Key To Species ◽  
Larval Instars ◽  
Diagnostic Characters ◽  
Ontogenetic Stages ◽  
First Time ◽  
Taxonomic Relations

Formation of Pattern and Diagnostic Instar Features of the Head in Caterpillars from Genus Peridea (Lepidoptera, Notodontidae) Pattern and colouration of caterpillar head of all larval instar of 7 species from genus Peridea Stephens, 1828 are studied. Formation of caterpillar head pattern in ontogenesis is discussed. Diagnostic characters, both specific and larval instars, are recorded for the first time. Key to species according to larval instars is given. Evidently, only larvae of the 1st instar demonstrate different directions in the pattern formation. This characteristic can be used for clearing of taxonomic relations in the genera and on the earliest ontogenetic stages (1st larval instar) only. In the following (2nd-5th) instars, the pattern became more or less of the same type. It depends on stripes shape or colouration only and can serve as good specific diagnostic character. To determine larval instar, both width of the head capsule and head pattern should be taken into account.

Oocyte Numbers as a Diagnostic Character for the Identification of Ammocœte Species

Nature ◽  
1961 ◽  
Vol 191 (4794) ◽  
pp. 1215-1216 ◽  
Author(s):  
M. W. HARDISTY
Keyword(s):  
Diagnostic Character

New synonyms and a new subspecies of Macrogomphus Selys, 1858 (Odonata: Gomphidae) from continental south-east Asia

Zootaxa ◽  
2019 ◽  
Vol 4615 (1) ◽  
pp. 57
Author(s):  
OLEG E. KOSTERIN
Keyword(s):  
East Asia ◽  
Great Lake ◽  
Diagnostic Character ◽  
South East Asia ◽  
New Subspecies ◽  
New Synonyms ◽  
Siem Reap ◽  
Tonle Sap ◽  
Lake Tonle Sap ◽  
The Relationship

The taxa of the genus Macrogomphus Selys, 1858 occurring in continental south-east Asia are reconsidered. Macrogomphus rivularis Förster, 1914 (described from Vietnam), M. borikhanensis Fraser, 1933 (described from Laos), and M. guilinensis Chao, 1983 (described from China), are synonymised with M. albardae Selys, 1878. The relationship and conspecificity of the latter with M. parallelogramma Burmeister, 1839 are doubtful, perhaps they are bona species. Males of M. albardae (and seemingly of parallelogramma as well) are approximately trimorphic for the pale pattern of the abdominal S3–S6, being of either a ‘dashed morph’ (with small isolated anteriolateral spots and conspicuous middorsal streaks), or a ‘ringed morph (with broad anterior rings and less conspicuous middorsal streaks), or an ‘intermediate morph’. Validity of the species M. matsukii Asahina, 1986 is doubted; its holotype could be an aberrant male of M. albardae. The main diagnostic character of M. albardae, M. phalantus Lieftinck, 1935 and probably M. parallelogramma, is clarified to be the structure of the cercus inner branch. M. phalantus jayavarman subsp. nov. is described from temporarily inundated forest at the northern bank of the great Lake Tonlé Sap of Cambodia (Siem Reap Province, 1.5 km SSW of Kampong Pluk village, 13.1956° N, 103.9725° E, 3 m a.s.l.), which is ca 1,300 km north and overseas from the presumed range of M. phalantus phalantus. 

A review of the genus Actenoncus Chaudoir (Coleoptera: Caraboidea: Orthogoniini)

Zootaxa ◽  
2009 ◽  
Vol 2135 (1) ◽  
pp. 57-64 ◽  
Author(s):  
MING-YI TIAN ◽  
THIERRY DEUVE
Keyword(s):  
New Species ◽  
Diagnostic Character ◽  
New Combination ◽  
The Right ◽  
First Time ◽  
A New Species

In the present paper the Oriental carabid genus Actenoncus Chaudoir, 1871 is redefined and reviewed for the first time. The absence of a median tooth on the right mandible is no longer considered a diagnostic character of this genus. Orthogonius foersteri Andrewes, 1931 is transferred into Actenoncus (new combination) and a new species is described from Indonesia, A. wallacei, new species. A key to all known species of Actenoncus is also provided.

scholarly journals A revision of Macromalthinus Pic, 1919 with description of six new species (Coleoptera: Cantharidae: Chauliognathinae)

2018 ◽  
Vol 58 ◽  
pp. e20185858 ◽  
Author(s):  
Gabriel Biffi ◽  
Robert Constantin
Keyword(s):  
Differential Diagnosis ◽  
New Species ◽  
New Records ◽  
Identification Key ◽  
Diagnostic Character ◽  
Female Genitalia ◽  
Type Specimens ◽  
General Morphology ◽  
Distribution Maps ◽  
Taxonomic Changes

A revision of the genus Macromalthinus resulted on recognition of twelve species, six of which are herein proposed as new: Macromalthinus belemensis Brancucci, 1981, M. brasiliensis (Pic, 1906), M. globuliventris Brancucci, 1981, M. guyanensis sp. nov., M. luteoapicalis sp. nov., M. maximiceps Pic, 1919, M. orapuensis sp. nov., M. piceiventris sp. nov., M. quadratithorax sp. nov., M. santaremensis Brancucci, 1981, M. schmidli Constantin, 2010 and M. xerophilus sp. nov. No taxonomic changes were necessary in the previously described species, which are distinguished through differential diagnosis and an updated identification key. The type specimens of all species were revisited and their photographs are provided. Discussions on the diagnostic character of each species, general morphology and the first description of wings and female genitalia of Macromalthinus are presented, as well as the first description of the female of M. maximiceps Pic, 1919. Finally, new records and distribution maps are presented for all species.

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