scholarly journals A phylogenetic study of floral morphology of some members of Asclepiadaceae R.Br

2017 ◽  
Vol 6 (2) ◽  
pp. 1546
Author(s):  
Sanjit Sinha ◽  
Amal Kumar Mondal*
Keyword(s):  
Phylogenetic Relationship ◽  
Floral Morphology ◽  
Morphological Diversity ◽  
Phylogenetic Study ◽  
Coronal Structure ◽  
Phylogenetic Hypothesis ◽  
The Family ◽  
Similarity Indices

Floral morphological diversity and phylogenetic relationship were studied in the family Asclepiadaceae. This family characterized by unique features that contributes to extreme floral complexity and diversity. In this paper, we used preliminary phylogenetic hypothesis for the family Asclepiadaceae to explore the mode of diversification in pollinarium and coronal structure. The occurance, size, shape, position, orientation of pollinia, mode of pollination and the presence of form of coralline corona and gynostegial corona were studied for similarity indices between two subfamilies Periplocoideae and Asclepiadoideae.

Morphological re-description and phylogenetic relationship of five myxosporean species of the family Myxobolidae infecting Nile tilapia

2017 ◽  
Vol 124 (3) ◽  
pp. 201-214 ◽  
Author(s):  
R Abdel-Gaber ◽  
F Abdel-Ghaffar ◽  
S Maher ◽  
AM El-Mallah ◽  
S Al Quraishy ◽  
...  
Keyword(s):  
Phylogenetic Relationship ◽  
Nile Tilapia ◽  
The Family ◽  
Relationship Of ◽  
Myxosporean Species

Taxonomic status of Chinese bahaba (Bahaba taipingensis) and its phylogenetic relationship with other species in the family Sciaenidae

2012 ◽  
Vol 23 (2) ◽  
pp. 53-61 ◽  
Author(s):  
Wei He ◽  
Wei-Hua Lu ◽  
Xi-Guo Li ◽  
Ning-Ning Lu ◽  
Dong-Fang Sun ◽  
...  
Keyword(s):  
Phylogenetic Relationship ◽  
Taxonomic Status ◽  
The Family

scholarly journals Review of the family Rivulidae (Cyprinodontiformes, Aplocheiloidei) and a molecular and morphological phylogeny of the annual fish genus Austrolebias Costa 1998

2018 ◽  
Vol 16 (3) ◽  
Author(s):  
Marcelo Loureiro ◽  
Rafael de Sá ◽  
Sebastián W. Serra ◽  
Felipe Alonso ◽  
Luis Esteban Krause Lanés ◽  
...  
Keyword(s):  
Phylogenetic Relationships ◽  
The Self ◽  
Phylogenetic Hypothesis ◽  
Annual Life Cycle ◽  
Internal Fertilization ◽  
Annual Fish ◽  
Diapausing Eggs ◽  
Neotropical Fishes ◽  
Seasonal Ponds ◽  
The Family

ABSTRACT The family Rivulidae is the fourth most diverse clade of Neotropical fishes. Together with some genera of the related African family Nothobranchiidae, many rivulids exhibit a characteristic annual life cycle, with diapausing eggs and delayed embryonic development, which allows them to survive in the challenging seasonal ponds that they inhabit. Rivulidae also includes two species known as the only the self-fertilizing vertebrates and some species with internal fertilization. The first goal of this article is to review the systematics of the family considering phylogenetic relationships and synapomorphies of subfamilial clades, thus unifying information that is dispersed throughout the literature. From this revision, it is clear that phylogenetic relationships within Rivulidae are poorly resolved, especially in one of the large clades that compose it, the subfamily Rivulinae, where conflicting hypotheses of relationships of non-annual and annual genera are evident. The second goal of this work is to present an updated phylogenetic hypothesis (based on mitochondrial, nuclear, and morphological information) for one of the most speciose genus of Rivulidae, Austrolebias. Our results confirm the monophyly of the genus and of some subgeneric clades already diagnosed, but propose new relationships among them and their species composition, particularly in the subgenus Acrolebias.

scholarly journals Morphological diversity in tenrecs (Afrosoricida, Tenrecidae): comparing tenrec skull diversity to their closest relatives

2015 ◽  
Author(s):  
Sive Finlay ◽  
Natalie Cooper
Keyword(s):  
Quantitative Analysis ◽  
Quantitative Methods ◽  
Morphological Diversity ◽  
Lateral View ◽  
Ecological Niches ◽  
Diverse Group ◽  
Geometric Morphometric ◽  
Skull Shape ◽  
Morphometric Analyses ◽  
The Family

Morphological diversity is often studied qualitatively. However, to truly understand the evolution of exceptional diversity, it is important to take a quantitative approach instead of relying on subjective, qualitative assessments. Here, we present a quantitative analysis of morphological diversity in a Family of small mammals, the tenrecs (Afrosoricida, Tenrecidae). Tenrecs are often cited as an example of an exceptionally morphologically diverse group. However, this assumption has not been tested quantitatively. We use geometric morphometric analyses of skull shape to test whether tenrecs are more morphologically diverse than their closest relatives, the golden moles (Afrosoricida, Chrysochloridae). Tenrecs occupy a wider range of ecological niches than golden moles so we predict that they will be more morphologically diverse. Contrary to our expectations, We find that tenrec skulls are only more morphologically diverse than golden moles when measured in lateral view. Furthermore, similarities among the species-rich Microgale tenrec Genus appear to mask higher morphological diversity in the rest of the Family. These results reveal new insights into the morphological diversity of tenrecs and highlight the importance of using quantitative methods to test qualitative assumptions about patterns of morphological diversity.

scholarly journals Transitional evolutionary forms in chasmosaurine ceratopsid dinosaurs: evidence from the Campanian of New Mexico

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e9251
Author(s):  
Denver W. Fowler ◽  
Elizabeth A. Freedman Fowler
Keyword(s):  
New Mexico ◽  
Phylogenetic Relationship ◽  
Late Cretaceous ◽  
Phylogenetic Hypothesis ◽  
Stepwise Change ◽  
Horseshoe Canyon Formation

Three new chasmosaurines from the Kirtland Formation (~75.0–73.4 Ma), New Mexico, form morphological and stratigraphic intermediates between Pentaceratops (~74.7–75 Ma, Fruitland Formation, New Mexico) and Anchiceratops (~72–71 Ma, Horseshoe Canyon Formation, Alberta). The new specimens exhibit gradual enclosure of the parietal embayment that characterizes Pentaceratops, providing support for the phylogenetic hypothesis that Pentaceratops and Anchiceratops are closely related. This stepwise change of morphologic characters observed in chasmosaurine taxa that do not overlap stratigraphically is supportive of evolution by anagenesis. Recently published hypotheses that place Pentaceratops and Anchiceratops into separate clades are not supported. This phylogenetic relationship demonstrates unrestricted movement of large-bodied taxa between hitherto purported northern and southern provinces in the late Campanian, weakening support for the hypothesis of extreme faunal provincialism in the Late Cretaceous Western Interior.

scholarly journals A taxonomic revision of the family Harrimaniidae (Hemichordata: Enteropneusta) with descriptions of seven species from the Eastern Pacific

Zootaxa ◽  
2010 ◽  
Vol 2408 (1) ◽  
pp. 1 ◽  
Author(s):  
C. DELAND ◽  
C. B. CAMERON ◽  
K. P. RAO ◽  
W. E. RITTER ◽  
T. H. BULLOCK
Keyword(s):  
New Species ◽  
Taxonomic Revision ◽  
Morphological Characters ◽  
Eastern Pacific ◽  
Nomen Nudum ◽  
Phylogenetic Hypothesis ◽  
Number Of Species ◽  
Dichotomous Key ◽  
The Family ◽  
The Status

The family Harrimaniidae (Hemichordata: Enteropneusta) is revised on the basis of morphological characters. The number of harrimaniid genera is increased to nine by the addition of Horstia n. gen., Mesoglossus n. gen., Ritteria n. gen. and Saxipendium, a genus previously assigned to the monospecific family Saxipendiidae. The number of species is increased to 34, resulting from the description of five new species from the eastern Pacific — Horstia kincaidi, Mesoglossus intermedius, M. macginitiei, Protoglossus mackiei and Ritteria ambigua. A description is supplied for a sixth harrimaniid species, Stereobalanus willeyi Ritter & Davis, 1904, which previously had the status of a nomen nudum. Four harrimaniids previously assigned to the genus Saccoglossus are transfered to the genus Mesoglossus — M. bournei, M. caraibicus, M. gurneyi and M. pygmaeus, while Saccoglossus borealis is reassigned to the genus Harrimania. Notes on habitat and zoogeography are included for the seven foregoing species and a table of diagnostic characters for existing and new species and a dichotomous key to the enteropneust families and harrimaniid genera are provided. Finally, a phylogenetic hypothesis concerning the Harrimaniidae is postulated, with discussion on the evolution of the group.

Molecular analyses of genetic variation and phylogenetic relationship in Indian soap nut ( Sapindus L.) and closely related taxa of the family Sapindaceae

Meta Gene ◽  
2017 ◽  
Vol 13 ◽  
pp. 50-56 ◽  
Author(s):  
Kamalesh S. Mahar ◽  
Lok Man S. Palni ◽  
Shirish A. Ranade ◽  
Veena Pande ◽  
Tikam S. Rana
Keyword(s):  
Genetic Variation ◽  
Phylogenetic Relationship ◽  
Molecular Analyses ◽  
The Family ◽  
Indian Soap

scholarly journals Review on the molecular study of the Diplozoidae: analyses of currently available genetic data, what it tells us, and where to go from here

2020 ◽  
Vol 13 (1) ◽  
Author(s):  
Quinton Marco Dos Santos ◽  
Annemariè Avenant-Oldewage
Keyword(s):  
Sequence Data ◽  
Molecular Study ◽  
Turn Of The Century ◽  
Phylogenetic Study ◽  
Online Databases ◽  
Crucial Component ◽  
The Family ◽  
Molecular Information ◽  
Taxonomic Approach ◽  
Species Descriptions

Abstract The use of molecular tools in the study of parasite taxonomy and systematics have become a substantial and crucial component of parasitology. Having genetic characterisation at the disposal of researchers has produced mostly useful, and arguably more objective conclusions. However, there are several groups for which limited genetic information is available and, coupled with the lack of standardised protocols, renders molecular study of these groups challenging. The Diplozoidae are fascinating and unique monogeneans parasitizing mainly freshwater cyprinid fishes in Europe, Asia and Africa. This group was studied from a molecular aspect since the turn of the century and as such, limitations and variability concerning the use of these techniques have not been clearly defined. In this review, all literature and molecular information, primarily from online databases such as GenBank, were compiled and scrupulously analysed for the Diplozoidae. This was done to review the information, detect possible pitfalls, and provide a “checkpoint” for future molecular studies of the family. Hindrances detected are the availability of sequence data for only a limited number of species, frequently limited to a single sequence per species, and the heavy reliance on one non-coding ribosomal marker (ITS2 rDNA) which is difficult to align objectively and displays massive divergences between taxa. Challenging species identification and limited understanding of diplozoid species diversity and plasticity are also likely restricting factors, all of which hamper the accurate taxonomic and phylogenetic study of this group. Thus, a more integrated taxonomic approach through the inclusion of additional markers, application of more rigorous morphological assessment, more structured barcoding techniques, alongside thorough capturing of species descriptions including genetypes, genophore vouchers and reference collections in open sources are encouraged. The pitfalls highlighted are not singular to the Diplozoidae, and the study of other groups may benefit from the points raised here as well.

scholarly journals Floral Morphology of the Family Compositae II

1964 ◽  
Vol 77 (914) ◽  
pp. 290-296 ◽  
Author(s):  
Sudhakar MISRA
Keyword(s):  
Floral Morphology ◽  
The Family

Complementary description of Africoseius lativentris and placement of Africoseius in Podocinidae (Acari, Mesostigmata) based on molecular and morphological evidences

2019 ◽  
Vol 24 (10) ◽  
pp. 2369-2394 ◽  
Author(s):  
Diana Rueda-Ramírez ◽  
Jandir C. Santos ◽  
Nazer Famah Sourassou ◽  
Peterson R. Demite ◽  
Andrés Puerta-gonzález ◽  
...  
Keyword(s):  
Taxonomic Position ◽  
Phylogenetic Study ◽  
Similar Data ◽  
Free Living ◽  
Paulo State ◽  
Rdna Sequences ◽  
The Family ◽  
28S Rdna Sequences ◽  
Similarities And Differences ◽  
Longitudinal Extension

Morphological details of specimens collected from several localities in Brazil and identified as Africoseius lativentris (Karg 1982) are provided. The taxonomic position of Africoseius Krantz, 1962 has been debated over the years, with repeated changes in its familial placement. A phylogenetic study based on 18S and 28S rDNA sequences of the Brazilian population of A. lativentris collected at Jaboticabal, São Paulo State, and similar data of 70 taxa representing 11 families of Gamasina indicated that Africoseius is a member of the well-supported Podocinidae (sensu Lindquist et al. 2009) clade. The main morphological similarities and differences between Africoseius and the group of species until now placed in Podocinidae sensu Lindquist et al. (2009) are listed. Apomorphic characteristics uniting those taxa include the hypotrichous condition of tibia I (eight and nine setae instead of ten or more in other free-living Gamasina) and the insertions of av2 and pv2, considerably more distal on tarsi II and III than in the majority of the free-living Gamasina. Within Podocinidae, a new subfamily, Africoseiinae, is proposed, based on uniquely apomorphic characteristics of the setae ad4 and pd4 (sensu  Evans 1969) of tarsi II–IV absent, and setae av4 and pv4 of same basitarsi long, incurved and close to each other and to a posterior longitudinal extension of the peripodomeric suture and on the attenuated form of the lateral (rather than the medial) hypostomatic setae. This subfamily is currently represented by Africoseius areolatus Krantz and Africoseius lativentris (Karg 1982), while all other presently known species of the family are now placed in the subfamily Podocininae.

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