Female morphs of the damselfly Enallagma boreale Selys (Odonata: Coenagrionidae): a benefit for androchromatypes

1991 ◽  
Vol 69 (7) ◽  
pp. 1969-1970 ◽  
Author(s):  
Mark R. L. Forbes
Keyword(s):  
Experimental Evidence ◽  
Conspecific Male ◽  
Distinct Colour ◽  
Eastern Ontario ◽  
Enallagma Boreale ◽  
Colour Morphs

Females of the coenagrionid damselfly Enallagma boreale Selys occur as three distinct colour morphs at a study site in eastern Ontario, Canada; > 65% are blue (termed androchromatypes) like the conspecific male, ca. 30% are green, and < 5% have both blue and green on their abdomen. I provide experimental evidence which suggests that one advantage of androchromatypism is avoidance of harassment from heterospecific males of the congeneric damselfly Enallagma ebrium (Hagen).

Distinct colour morphs in nestling European Bee-eaters Merops apiaster: is there an adaptive value?

2011 ◽  
Vol 152 (4) ◽  
pp. 1001-1005 ◽  
Author(s):  
Martin Kapun ◽  
Alžbeta Darolová ◽  
Ján Krištofik ◽  
Katharina Mahr ◽  
Herbert Hoi
Keyword(s):  
Adaptive Value ◽  
Merops Apiaster ◽  
Distinct Colour ◽  
Colour Morphs

scholarly journals A new synonym in the subfamily Thrigmopoeinae Pocock, 1900 (Araneae, Theraphosidae)

ZooKeys ◽  
2018 ◽  
Vol 749 ◽  
pp. 81-86 ◽  
Author(s):  
Pradeep M. Sankaran ◽  
Pothalil A. Sebastian
Keyword(s):  
Natural History ◽  
Junior Synonym ◽  
New Synonym ◽  
Distinct Colour ◽  
Colour Morphs

As the species Haploclastusdevamatha Prasanth &amp; Jose, 2014 is indistinguishable from Thrigmopoeuspsychedelicus Sanap &amp; Mirza, 2014, the latter is herein considered junior synonym of the former. Occurrence of polychromatism in H.devamatha is noted, and two distinct colour morphs of the species are recognised, a pink form and a blue form. The natural history and conservation of the species are discussed and its known distribution is updated.

Does colour matter? Genetic differentiation of colour morphs of the Asian golden web spider Nephila antipodiana (Araneae: Nephilidae)

2018 ◽  
Vol 68 (4) ◽  
pp. 417-427
Author(s):  
Van Lun Low ◽  
Yusoff Norma-Rashid ◽  
Rosichon Ubaidillah ◽  
Amri Yusoff ◽  
Batah Kunalan Prakash ◽  
...  
Keyword(s):  
Genetic Differentiation ◽  
18S Rrna ◽  
Mitochondrial Coi ◽  
Yellowish Green ◽  
Web Spider ◽  
Polymorphic Species ◽  
Distinct Colour ◽  
Coi Sequences ◽  
Colour Morphs ◽  
Insight Into

Abstract Here we present the first attempt to test for genetic differentiation among four distinct colour morphs of the Asian golden web spider Nephila antipodiana Walckenaer. Fragments of the 18S rRNA (18S) and cytochrome c oxidase subunit I (COI) genes were sequenced in eight populations of N. antipodiana belonging to four distinct colour morphs: yellow, yellowish green, and two newly discovered morphs, reddish yellow and white-spotted. The nuclear sequences amplified from females of the four colour morphs were identical. The mitochondrial COI sequences, on the other hand, revealed slightly higher variation by recovering three haplotypes belonging to two different clades. Clade I comprises yellow, yellowish green and reddish yellow morphs from the mainland of Southeast Asia and Java, whereas clade II is restricted to white-spotted morph originating from Borneo. The low genetic divergence between both clades, despite being distinctive, undoubtedly provides new insight into the genetic diversity of this polymorphic species.

Revision of the Asian pseudoscorpion genus Tullgrenius Chamberlin, 1933 (Pseudoscorpiones: Atemnidae: Miratemninae), a tale of intraspecific variation

ENTOMON ◽  
2021 ◽  
Vol 46 (2) ◽  
pp. 121-134
Author(s):  
Aneesh V. Mathew ◽  
Mathew M. Joseph
Keyword(s):  
Intraspecific Variation ◽  
Current Distribution ◽  
Distinct Colour ◽  
Colour Morphs

The Asian pseudoscorpion genus Tullgrenius Chamberlin, 1933 is revised. A neotype is designated for Tullgrenius indicus Chamberlin, 1933, based on topotype material and a detailed description of its male is provided. Two new synonymies are proposed: Tullgrenius vachoni Murthy, 1962 syn. nov. and Tullgrenius orientalis Sivaraman, 1980 syn. nov. = T. indicus. Two distinct colour morphs of T. indicus are recognized: a brown and black morph. Supplementary descriptions and illustrations for Tullgrenius afghanicus Beier, 1959 and Tullgrenius compactus Beier, 1951 are detailed with current distribution of all the known Tullgrenius spp..

scholarly journals First photographic evidence of the Asiatic Golden Cat Catopuma temminckii Vigors & Horsfield, 1827 (Mammalia: Carnivora: Felidae) in Sakteng Wildlife Sanctuary, Bhutan

2020 ◽  
Vol 12 (2) ◽  
pp. 15262-15266
Author(s):  
Sonam Wangyel ◽  
Kumbu Dorji ◽  
Sonam Tobgay ◽  
Norbu Yangdon
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Habitat Loss ◽  
Conservation Status ◽  
Wildlife Sanctuary ◽  
Future Studies ◽  
Photographic Evidence ◽  
Wild Felids ◽  
Distinct Colour ◽  
Colour Morphs

The Asiatic Golden Cat Catopuma temminckii is among Asia’s least studied wild felids.  We report the first photographic evidence of its presence in Sakteng Wildlife Sanctuary, eastern Bhutan, where it was recorded above 3,000m.  The photographs show three distinct colour morphs, viz., golden, buff brown, and melanistic.  The main threat to the species in the sanctuary appears to be habitat loss due to increasing developmental activities and land use change.  Future studies are needed to determine the conservation status of Asiatic Golden Cats in Sakteng Wildlife Sanctuary. 

scholarly journals Revision of the Neotropical hoverfly genus Peradon Reemer (Diptera, Syrphidae, Microdontinae)

ZooKeys ◽  
2019 ◽  
Vol 896 ◽  
pp. 1-93
Author(s):  
Menno Reemer ◽  
Jeffrey H. Skevington ◽  
Scott Kelso
Keyword(s):  
Mitochondrial Dna ◽  
Morphological Characters ◽  
Valid Species ◽  
Dna Barcodes ◽  
First Case ◽  
Ant Nest ◽  
Distinct Colour ◽  
Colour Morphs

The species of the Neotropical hoverfly genus Peradon Reemer, 2013 are revised, based on morphological characters with aid of mitochondrial DNA barcodes. The resulting number of valid species is increased to 31, of which the following seven are described as new: P. ballux Reemer, sp. nov., P. brevis Reemer, sp. nov., P. costaricensis Reemer, sp. nov., P. notialus Reemer, sp. nov., P. palpator Reemer, sp. nov., P. pompiloides Reemer, sp. nov., and P. surinamensis Reemer, sp. nov. Two new synonymies are established: Microdon langi Curran, 1925, syn. nov. and Microdon flavomarginatum Curran, 1925, syn. nov. are both junior synonyms of Mulio bidens Fabricius, 1805. A neotype is designated for Microdon diaphanus Sack, 1921. This neotype, which has been reared from an ant nest, also represents the first case of a larval record for this genus. In some species, most notably in P. bidens (Fabricius) and P. normalis (Curran), discrete and distinct colour morphs are recognized, with strongly differing colouration of wings and abdomen.

How do memory modules differentially contribute to familiarity and recollection?

2019 ◽  
Vol 42 ◽  
Author(s):  
Olya Hakobyan ◽  
Sen Cheng
Keyword(s):  
Recognition Memory ◽  
Experimental Evidence ◽  
Subjective Experience ◽  
Target Article ◽  
Memory Modules ◽  
Familiarity And Recollection ◽  
Memory Contents

Abstract We fully support dissociating the subjective experience from the memory contents in recognition memory, as Bastin et al. posit in the target article. However, having two generic memory modules with qualitatively different functions is not mandatory and is in fact inconsistent with experimental evidence. We propose that quantitative differences in the properties of the memory modules can account for the apparent dissociation of recollection and familiarity along anatomical lines.

Redox Reactions in Lipid Membranes as a Model for Primordial Energy-Conserving Systems

1997 ◽  
Vol 161 ◽  
pp. 437-442
Author(s):  
Salvatore Di Bernardo ◽  
Romana Fato ◽  
Giorgio Lenaz
Keyword(s):  
Experimental Evidence ◽  
Lipid Membranes ◽  
Energy Supply ◽  
Redox Reactions ◽  
Living Systems ◽  
Asymmetric Distribution ◽  
Conservation Of Energy ◽  
Asymmetrical Distribution ◽  
Energy Conserving ◽  
Living Organisms

AbstractOne of the peculiar aspects of living systems is the production and conservation of energy. This aspect is provided by specialized organelles, such as the mitochondria and chloroplasts, in developed living organisms. In primordial systems lacking specialized enzymatic complexes the energy supply was probably bound to the generation and maintenance of an asymmetric distribution of charged molecules in compartmentalized systems. On the basis of experimental evidence, we suggest that lipophilic quinones were involved in the generation of this asymmetrical distribution of charges through vectorial redox reactions across lipid membranes.

A Method for Setting the Clearance Angle

1972 ◽  
Vol 30 ◽  
pp. 388-389
Author(s):  
Michael T. Bucek ◽  
Howard J. Arnott
Keyword(s):  
Experimental Evidence ◽  
Light Source ◽  
Black Spot ◽  
Critical Factor ◽  
Clearance Angle ◽  
Crude Approximation ◽  
Ultrathin Sections

It is believed by the authors, with supporting experimental evidence, that as little as 0.5°, or less, knife clearance angle may be a critical factor in obtaining optimum quality ultrathin sections. The degree increments located on the knife holder provides the investigator with only a crude approximation of the angle at which the holder is set. With the increments displayed on the holder one cannot set the clearance angle precisely and reproducibly. The ability to routinely set this angle precisely and without difficulty would obviously be of great assistance to the operator. A device has been contrived to aid the investigator in precisely setting the clearance angle. This device is relatively simple and is easily constructed. It consists of a light source and an optically flat, front surfaced mirror with a minute black spot in the center. The mirror is affixed to the knife by placing it permanently on top of the knife holder.

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