A MORPHOMETRIC STUDY OF THE TAXONOMIC STATUS OF BOMBUS SANDERSONI (HYMENOPTERA: APIDAE)

1978 ◽  
Vol 110 (6) ◽  
pp. 647-654 ◽  
Author(s):  
R. C. Plowright ◽  
M. J. Pallett
Keyword(s):  
Multivariate Analysis ◽  
Taxonomic Status ◽  
Morphometric Study ◽  
Wing Venation ◽  
Museum Specimens

AbstractA re-investigation of the taxonomic status of Bombus sandersoni Fkln. is described. Using multivariate analysis of wing venation data taken from previously identified museum specimens, a non-overlapping separation between sandersoni, B. frigidus F. Sm., and B. vagans F. Sm. was obtained. The Cresson lectotype of B. couperi appears in some respects intermediate between frigidus and sandersoni. Therefore the authors advocate retention of sandersoni as the valid name for the species, while admitting the possibility that this taxon may turn out to be a clinal variant of frigidus.

THE TAXONOMIC STATUS OF BOMBUS FRANKLINI (HYMENOPTERA: APIDAE)

1980 ◽  
Vol 112 (5) ◽  
pp. 475-479 ◽  
Author(s):  
R. C. Plowright ◽  
W. P. Stephen
Keyword(s):  
Multivariate Analysis ◽  
Male Genitalia ◽  
Taxonomic Status ◽  
Wing Venation ◽  
Clear Separation

AbstractA re-investigation of the taxonomic status of Bombus franklini (Frison) is described. Comb architecture was found to be characteristic of other taxa within its subgenus (Bombus s.s.) but multivariate analysis of wing venation data taken from queens gave a clear separation of franklini from other species within the subgenus. The male genitalia of franklini are markedly distinct from those of B. occidentalis Green. The authors advocate retention of specific status for franklini.

Electrophoretic and Morphological Comparisons of Lampropholis-Delicata (Lacertilia, Scincidae) Populations From Eastern Australia, and a Resolution of the Taxonomic Status of This Species

1989 ◽  
Vol 37 (5) ◽  
pp. 561 ◽  
Author(s):  
PB Mather
Keyword(s):  
Multivariate Analysis ◽  
Taxonomic Status ◽  
Type Locality ◽  
Isozyme Electrophoresis ◽  
Population Groups ◽  
Eastern Australia

Isozyme electrophoresis and morphological comparisons were used to examine 40 populations of the skink Lampropholis delicata from eastern Australia. Four electrophoretically distinct forms were recognised amongst the sampled populations. Morphological comparisons were able to separate the four population groups only when meristic and colour characters were combined and compared by means of multivariate analysis. The taxonomic status of L. delicata was stabilised by nominating a neotype for the species, collected from the type locality.

scholarly journals Taxonomy of the lesser jerboa Jaculus jaculus (Dipodidae, Rodentia) based on allozymic and morphological variation

2010 ◽  
Vol 56 (4) ◽  
pp. 421-431 ◽  
Author(s):  
Abderraouf Ben Faleh ◽  
Abdelwaheb Ben Othmen ◽  
Khaled Said
Keyword(s):  
Phylogenetic Analysis ◽  
Multivariate Analysis ◽  
Genetic Distance ◽  
North Africa ◽  
Morphometric Analysis ◽  
Morphological Variation ◽  
Taxonomic Status ◽  
Sympatric Species ◽  
Restricted Area ◽  
Meeting Point

Abstract The lesser Egyptian jerboa Jaculus jaculus, is a member of the subfamily Dipodinae, known to have a number of subspecies. Previous studies of J. jaculus from North Africa found various morphological forms of unknown taxonomic status, which are frequently grouped into two taxa: J. jaculus and J. deserti. We assessed the taxonomic status of this taxon in Tunisia using allozymic (phylogenetic analysis of 23 genetic loci encoding 16 enzymatic proteins) and morphological (multivariate analysis of 13 craniodental characters) analyses of 136 J. jaculus specimens collected from seven localities within its distribution range. Allozymic analysis clearly indicated the existence of two distinct groups of J. jaculus, with a mean genetic distance (D) value of 0.99 and FST=0.52. Individuals within the two groups did not show any obvious geographical structuration, even within the Matmata locality which represents the meeting point for the two groups where they were found in sympatry. Additionally, morphometric analysis of 13 craniodental characters was clearly separated the two groups. These results were obtained over a very restricted area of the total distribution of J. jaculus and strongly suggest the occurrence of two separate and often sympatric species within the currently accepted J. jaculus in Tunisia: J. jaculus and J. deserti .

Taxonomic and nomenclatural status of Iberian Algyroides (Lacertidae)

2019 ◽  
Vol 40 (1) ◽  
pp. 91-102 ◽  
Author(s):  
Alberto Sánchez-Vialas ◽  
Marta Calvo-Revuelta ◽  
José Luis Rubio ◽  
Fernando Palacios ◽  
Mario García-París
Keyword(s):  
Morphological Variability ◽  
Taxonomic Status ◽  
Original Description ◽  
Museum Specimens ◽  
Single Specimen ◽  
Diagnostic Characters

Abstract The taxonomy and nomenclature of Iberian Algyroides are problematic. The first taxon described, A. hidalgoi Boscá, 1916, was based on a single specimen that was subsequently lost. The description of the second taxon, A. marchi Valverde, 1958, was based on the comparison of a newly discovered population with the original description of A. hidalgoi. However, A. hidalgoi specimens have never been recorded since for any locality. Therefore, three questions need to be addressed: Is A. hidalgoi Boscá, 1916 a morphologically diagnosable taxon different from all non-Iberian species of Algyroides? are A. hidalgoi and A. marchi conspecific? And if so, which is the correct name for the species? To clarify the taxonomic status of the Iberian Algyroides we (1) compare Boscá’s A. hidalgoi original description against the descriptions of all other species of Algyroides, (2) test the accuracy of Boscá’s A. hidalgoi by comparing it against 204 Iberian museum specimens, and (3) designate a neotype of A. hidalgoi that fits the head pholidosis described in the original description. We show that none of the diagnostic characters used by Valverde to differentiate between A. hidalgoi and A. marchi are actually diagnostic, as we found high levels of variability on those characters in the studied specimens. Our results validate Boscá’s description of A. hidalgoi, which fits within the morphological variability observed for southern Iberian Algyroides. As a result, we propose the strict synonymy of A. marchi Valverde, 1958 with A. hidalgoi Boscá, 1916.

Consequences of the misidentification of museum specimens: the taxonomic status of Canis lupaster soudanicus

2020 ◽  
Vol 101 (4) ◽  
pp. 1148-1150
Author(s):  
Andrew C Kitchener ◽  
Fabio A Machado ◽  
Virginia Hayssen ◽  
Patricia D Moehlman ◽  
Suvi Viranta
Keyword(s):  
Geometric Morphometrics ◽  
Species Conservation ◽  
Taxonomic Status ◽  
Junior Synonym ◽  
Museum Specimens ◽  
Museum Collections ◽  
Subsequent Research ◽  
Dental Measurements ◽  
Taxonomic Changes ◽  
Conservation And Management

Abstract Researchers are increasingly using museum collections for taxonomy, systematics, phylogenetics, and faunal analyses, and they assume that taxonomic identifications on museum labels are correct. However, identifications may be incorrect or out of date, which could result in false conclusions from subsequent research. A recent geometric morphometrics analysis of skulls of African canids by Machado and Teta (2020) suggested that Canis lupaster soudanicus is a junior synonym of Lupulella adusta. However, the holotype of soudanicus was not measured and further investigation of the putative soudanicus specimens used in this study showed that these originally were identified as L. adusta. This original identification was confirmed by dental measurements, which also confirm that the holotype of soudanicus is Canis lupaster. Hence, soudanicus should not be synonymized with L. adusta. This example highlights the importance of careful checking of species identifications of museum specimens prior to research and, where possible, including (holo)types of taxa, before making taxonomic changes that could have important consequences for species conservation and management.

Relationships between external morphology and foraging behaviour: bats in the genus Myotis

2002 ◽  
Vol 80 (6) ◽  
pp. 1004-1013 ◽  
Author(s):  
M Brock Fenton ◽  
Wieslaw Bogdanowicz
Keyword(s):  
Multivariate Analysis ◽  
Body Size ◽  
Morphometric Analysis ◽  
Foraging Behaviour ◽  
Morphological Features ◽  
External Morphology ◽  
Morphometric Study ◽  
Genetic Analyses ◽  
Phylogenetic Perspective

A morphometric study of 41 species of Myotis revealed significant associations between morphological features and foraging styles, namely aerial feeding, gleaning, feeding over water, and trawling. Aerial feeders have small hind feet, short calcars, short ears, and narrow tragi. Gleaners have small hind feet, long ears, and wide tragi and tend to be larger in body size. Bats that feed over water have large hind feet, short calcars, short ears, and narrow tragi and tend to be smaller in body size. Trawlers have large hind feet and long calcars and tend to be larger in body size. The morphometric analysis also confirmed that some species of Myotis were intermediate in morphological features, coincid ing with alternation between foraging styles. The results support the view that the morphological features previously used to assign Myotis species to subgenera are more functional than phylogenetic, a position supported by recent genetic analyses. Examination of foraging styles from a phylogenetic perspective suggests that aerial feeding is ancestral and that subsequent diversification has been associated with partitioning and specialization into either gleaning or foraging over water and trawling. When the predictions from the multivariate analysis of the data for the genus Myotis are used with data from other bats, they suggest that 5 species of Nycteris are gleaners, while 11 species of Eptesicus are either aerial feeders or feed over water.

Morphological and molecular diversity of the wild carrot Daucus pusillus: implications for classification and ex situ conservation

Botany ◽  
2014 ◽  
Vol 92 (5) ◽  
pp. 348-359 ◽  
Author(s):  
Maria S. Ibañez ◽  
Elsa L. Camadro ◽  
Carlos A. Sala ◽  
Ricardo W. Masuelli
Keyword(s):  
Multivariate Analysis ◽  
North American ◽  
Molecular Diversity ◽  
Taxonomic Status ◽  
Morphological Diversity ◽  
Its Region ◽  
Inter Simple Sequence Repeat ◽  
Ex Situ ◽  
Daucus Carota L ◽  
5.8S Rdna

Daucus pusillus Michx. and Daucus montevidensis Link ex Spreng. are wild carrots from the Americas with unresolved taxonomic status. An investigation was carried out with accessions of D. pusillus and (or) D. montevidensis from Argentina for (i) morphological and molecular (amplified fragments length polymorphism (AFLP) and inter simple sequence repeat (ISSR)) characterization, (ii) analysis of congruence of morphological and molecular variation, and (iii) comparison of diversity for the internal transcribed spacer (ITS) region with that reported for a North American accession of D. pusillus. Twelve accessions of D. pusillus and (or) D. montevidensis — representing their geographical distribution in Argentina — and one accession each of wild Daucus carota L. and Daucus montanus Humb. & Bonpl. ex Schult. — as outgroups — were included. In the multivariate analysis of morphological diversity, two accessions were clearly differentiated; this result is not sustained by multivariate analysis of molecular diversity. Based on multivariate and molecular variance (AMOVA) analyses, D. pusillus and (or) D. montevidensis accessions were separated at the molecular level into two groups, associated with geographical origin. Because this result is not supported by morphology, the segregation into two taxa seems unjustified. In all accessions, ITS and 5.8S rDNA regions had identical sequences, which differ in one nucleotide from the corresponding sequence of the North American accession. According to the combined results, D. pusillus would be a single taxon distributed from North to South America, and D. montevidensis a nomenclatural synonym. Autogamy of D. pusillus and its highly structured genetic diversity (Fst = 0.86) allows the application of a geographically targeted approach for germplasm exploration, conservation and eventual use in pre-breeding.

Molecules and morphology reveal cryptic variation among digeneans infecting sympatric mullets in the Mediterranean

Parasitology ◽  
2009 ◽  
Vol 137 (2) ◽  
pp. 287-302 ◽  
Author(s):  
I. BLASCO-COSTA ◽  
J. A. BALBUENA ◽  
J. A. RAGA ◽  
A. KOSTADINOVA ◽  
P. D. OLSON
Keyword(s):  
Sequence Data ◽  
Morphological Difference ◽  
Morphological Differentiation ◽  
Taxonomic Status ◽  
Comparative Sequence Analysis ◽  
Morphometric Study ◽  
Rrna Gene ◽  
Cryptic Variation ◽  
Morphological Criteria ◽  
The Mediterranean

SUMMARYWe applied a combined molecular and morphological approach to resolve the taxonomic status of Saccocoelium spp. parasitizing sympatric mullets (Mugilidae) in the Mediterranean. Eight morphotypes of Saccocoelium were distinguished by means of multivariate statistical analyses: 2 of Saccocoelium obesum ex Liza spp.; 4 of S. tensum ex Liza spp.; and 2 (S. cephali and Saccocoelium sp.) ex Mugil cephalus. Sequences of the 28S and ITS2 rRNA gene regions were obtained for a total of 21 isolates of these morphotypes. Combining sequence data analysis with a detailed morphological and multivariate morphometric study of the specimens allowed the demonstration of cryptic diversity thus rejecting the hypothesis of a single species of Saccocoelium infecting sympatric mullets in the Mediterranean. Comparative sequence analysis revealed 4 unique genotypes, thus corroborating the distinct species status of Saccocoelium obesum, S. tensum and S. cephali and a new cryptic species ex Liza aurata and L. saliens recognized by its consistent morphological differentiation and genetic divergence. However, in spite of their sharp morphological difference the 2 morphotypes from M. cephalus showed no molecular differentiation and 4 morphotypes of S. tensum were genetically identical. This wide intraspecific morphological variation within S. tensum and S. cephali suggests that delimiting species of Saccocoelium using solely morphological criteria will be misleading.

scholarly journals Genomic evidence for the Chinese mountain cat as a wildcat conspecific (Felis silvestris bieti) and its introgression to domestic cats

2021 ◽  
Vol 7 (26) ◽  
pp. eabg0221
Author(s):  
He Yu ◽  
Yue-Ting Xing ◽  
Hao Meng ◽  
Bing He ◽  
Wen-Jing Li ◽  
...  
Keyword(s):  
Taxonomic Status ◽  
Tibet Plateau ◽  
Genetic Integrity ◽  
Museum Specimens ◽  
Felis Silvestris ◽  
Domestic Cats ◽  
Conservation Implications ◽  
Contemporary Gene Flow ◽  
Genome Wide ◽  
Qinghai Tibet Plateau

The Qinghai-Tibet Plateau endemic Chinese mountain cat has a controversial taxonomic status, whether it is a true species or a wildcat (Felis silvestris) subspecies and whether it has contributed to cat (F. s. catus) domestication in East Asia. Here, we sampled F. silvestris lineages across China and sequenced 51 nuclear genomes, 55 mitogenomes, and multilocus regions from 270 modern or museum specimens. Genome-wide analyses classified the Chinese mountain cat as a wildcat conspecific F. s. bieti, which was not involved in cat domestication of China, thus supporting a single domestication origin arising from the African wildcat (F. s. lybica). A complex hybridization scenario including ancient introgression from the Asiatic wildcat (F. s. ornata) to F. s. bieti, and contemporary gene flow between F. s. bieti and sympatric domestic cats that are likely recent Plateau arrivals, raises the prospect of disrupted wildcat genetic integrity, an issue with profound conservation implications.

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