taxonomic relationship
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Phytotaxa ◽  
2022 ◽  
Vol 531 (1) ◽  
pp. 78-82
Author(s):  
GÜNTER GOTTSCHLICH ◽  
MILENA VILLA

A new hawkweed endemic to Northern Italy, Hieracium racemosum subsp. spinidentatum, is described and illustrated. Information on its morphology, distribution, ecology and taxonomic relationship is provided.


2021 ◽  
Vol 40 (4) ◽  
pp. 348-356
Author(s):  
Olexander Zhukov ◽  
Ludmila Arabadzhy-Tipenko

Abstract Taxonomic ratio in an ecological context is considered as an indicator of the level of competitive exclusion. In spite of more than a century of discussions on taxonomic ratio, the problem of finding an unbiased estimator for flora characterisation remains unsolved. The traditional form of taxonomic ratio (species/genus or species/families ratio) is biased, which depends on the area of territory for which the floral composition was established. This circumstance makes the taxonomic ratio an inadequate characteristic of the flora. To solve the problem of finding an unbiased estimator for the taxonomic ratio, we have combined two fundamental ecological generalisations. The first is that species that belong to the same genus usually live in similar habitats and have similar morphological features. The struggle for life between species from the same genus is, therefore, more intense than between species from different genera. The second is species–area relationship. We have considered the problem of finding an unbiased taxonomic relationship using the Arrhenius curves to fit species–area relationships. This combination allowed us to find a form of unbiased taxonomic relationship. The example of Cyanophyceae flora shows that this indicator is closely related to a wide range of ecological and biogeographical characteristics of vegetation. The residual of the linear equation of dependence of the logarithm of the number of species on the logarithm of the number of genera is an unbiased indicator of the taxonomic relation, which is independent of the number of genera (or number of families) and the sampling size (or area). An unbiased taxonomic relationship is a characteristic of regional flora, which depends on a wide range of its ecological and biogeographical features.


Zootaxa ◽  
2021 ◽  
Vol 5071 (3) ◽  
pp. 427-436
Author(s):  
YANHUA YAN ◽  
MENGYU LI ◽  
WEIHAI LI

Two species of the genus Furcaperla Sivec 1988 (in: Sivec et al. 1988), F. bifurcata (Wu, 1948) and F. jiangxiensis Yang & Yang, 1991 are illustrated and redescribed. The taxonomic relationship of F. bifurcata and F. jiangxiensis is discussed. An unassociated female from Guangxi Zhuang Autonomous Region, Furcaperla Cn-G is described under informal designation. The first record for F. jiangxiensis from Fujian Province is given.  


Zootaxa ◽  
2021 ◽  
Vol 5027 (1) ◽  
pp. 127-135
Author(s):  
XUEJUAN LI ◽  
YUXIN LIU ◽  
LILIANG LIN

The genera Teredorus and Systolederus belong to Tetriginae and Metrodorinae respectively. However, species within these two genera have strikingly similar features, made it difficult to identify clearly by morphological characteristics. In this study, we sequenced the mitochondrial genomes (mitogenomes) of two Teredorus species, and compared them with Systolederus mitochondrial sequences. The sequenced mitogenomes of T. hainanensis and T. bashanensis are 14,946 bp and 14,775 bp in size, respectively. The A+T content of mitogenomes is 76.2% (T. hainanensis) and 74.0% (T. bashanensis). Comparative analysis showed that mitochondrial sequences and structure were similar within these two genera. The results of K2P distances and phylogenetic analysis revealed that Systolederus and Teredorus might be likely considered as one genus of Teredorus. It will provide important resources for further understanding of the taxonomy and phylogenetic relationship of Systolederus and Teredorus.  


2021 ◽  
Vol 108 (1) ◽  
pp. 85-90
Author(s):  
Bilge Tunçkol ◽  
Necmi Aksoy ◽  
Hasan Yaşacak

Knautia arvensis (L.) Coult. (Caprifoliaceae), collected from Küre Mountains National Park (Kastamonu Section), is reported for the first time for the flora of Turkey. A brief description of the plant along with photographs and distribution map is given. Additionally, its taxonomic relationship with other closely allied taxa are examined and discussed. An identification key to the species of genus Knautia in Turkey is provided.


Zootaxa ◽  
2020 ◽  
Vol 4869 (1) ◽  
pp. 131-145
Author(s):  
ALEXSSANDRO CAMARGO ◽  
FRANCIELE CRISTINA DE SOUZA ◽  
TADEUSZ ZATWARNICKI

The third instar larva and puparium of Gastrops willistoni Cresson (Diptera: Ephydridae), preying on eggs in a foam nest of Leptodactylus knudseni Heyer (Anura: Leptodactylidae), in a central Amazonian dryland forest (Brazil) are described for the first time. The fusiform larva has a short breathing tube, its anterior spiracles are fan-shaped and posterior spiracles with three spircular openings. Pupa is ovoid with a broad anterior margin and bifurcate posterior tip. The taxonomic relationship of the frog egg predators, Gastrops Williston and Typopsilopa Cresson, are discussed. 


Zootaxa ◽  
2020 ◽  
Vol 4819 (3) ◽  
pp. 595-600
Author(s):  
HAO LIU ◽  
YANHUA YAN ◽  
WEIHAI LI ◽  
MINGWANG SHI

A poorly known perlid species, Flavoperla ovalolobata (Wu, 1948) is redescribed based on an adult male and four females newly collected at the type locality, Wuyishan located in Fujian Province of southeastern coastal China. Illustrations and color photographs are provided for this species. The taxonomic relationship of this taxon is discussed with related taxa.


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