Morphological differentiation of closely related species of the genus Bucculatrix Zeller, 1839 (Lepidoptera, Bucculatricidae) with an analysis of their distribution and mechanisms of reproductive isolation

2016 ◽  
Vol 96 (6) ◽  
pp. 672-678 ◽  
Author(s):  
S. V. Baryshnikova
Keyword(s):  
Reproductive Isolation ◽  
Related Species ◽  
Morphological Differentiation ◽  
Closely Related Species

Species delimitation of colour polymorphic Cladophorus (Coleoptera: Lycidae) from New Guinea

Zootaxa ◽  
2017 ◽  
Vol 4320 (3) ◽  
pp. 505 ◽  
Author(s):  
ROMANA KALOUSOVA ◽  
LADISLAV BOCAK
Keyword(s):  
Phylogenetic Analysis ◽  
Mitochondrial Dna ◽  
Related Species ◽  
Species Delimitation ◽  
Morphological Differentiation ◽  
Morphological Characters ◽  
Molecular Data ◽  
Closely Related Species ◽  
Dna Fragment ◽  
Colour Patterns

Cladophorus Guérin-Méneville, 1830 are endemic Papuan net-winged beetles which take part in highly diverse Müllerian mimicry rings. Available specimens were sequenced for cox1–tRNA-Leu–cox2 mitochondrial DNA fragment and the species delimitations were based on the genetic distance, phylogenetic analysis, and morphology. Three earlier described species were identified in the recently collected material and further 10 species are described: C. pallescens sp. nov., C. bicolor sp. nov., C. craterensis sp. nov., C. motykai sp. nov., C. mindikensis sp. nov., C. kailakiensis sp. nov., C. manokwarensis sp. nov., C. haiaensis sp. nov., C. humeralis sp. nov., and C. boceki sp. nov. DNA-based identifications provided some ambiguous results and closely related species could not be robustly delimited using solely molecular data. Additionally, the species limits were based on clearly defined morphological characters and the morphological differentiation was found unlinked from the genetic divergence. Colour patterns cannot be used for identification because all species available in more specimens were polymorphic and followed various local co-mimics. The Papuan fauna of Cladophorus is very diverse and the closely related species regularly occur in limited regions. Differentiation within restricted ranges is therefore considered as the main speciation mode. 

Reproductive isolation between two closely related species of the Queensland fruit fly Dracus tryoni (Frogg) and D. neohumeralis Hardy (Diptera : Tephritidae) I. Variation in humeral callus pattern and the occurrence of intermediate colour forms in the wild

1967 ◽  
Vol 15 (3) ◽  
pp. 501 ◽  
Author(s):  
H Wolda
Keyword(s):  
Reproductive Isolation ◽  
Related Species ◽  
Fruit Fly ◽  
Abundant Species ◽  
Colour Pattern ◽  
Wild Populations ◽  
Closely Related Species ◽  
Similar Variation ◽  
In The Wild

A number of samples from wild populations of the Queensland fruit fly, Dacus tryoni and D. neohumeralis, were studied. There is a considerable variation in the colour pattern on the humeral callus. This variation is continuous so that any criterion for distinguishing between "intermediates" and "good species" is purely arbitrary. It was found in areas where D. neohumeralis does not occur as well as in localities where it is very abundant. By whatever criterion one defines intermediates, there appears to be no relation between the frequency of such forms and the presence or absence of D. neohumeralis or with the relative proportions of the two species in the population. However, flies with only a very small yellow area on an otherwise brown humeral callus were found only in Cairns where D. neohumeralis is usually the most abundant species. A similar variation in humeral callus pattern was found in other related species, such as D. kraussi and D. halfordiae. It is concluded that the intermediate colour forms may not be hybrids between D. tryoni and D. neohumeralis but variants of D. tryoni and, possibly the darker forms from Cairns, of D. neohumeralis.

scholarly journals Contact-Chemosensory Evolution Underlying Reproductive Isolation in Drosophila Species

2020 ◽  
Vol 14 ◽  
Author(s):  
Kosei Sato ◽  
Daisuke Yamamoto
Keyword(s):  
Decision Making ◽  
Mate Choice ◽  
Reproductive Isolation ◽  
Sibling Species ◽  
Related Species ◽  
Main Theme ◽  
Biological Factors ◽  
Premating Isolation ◽  
Closely Related Species ◽  
Neural Activities

The main theme of the review is how changes in pheromone biochemistry and the sensory circuits underlying pheromone detection contribute to mate choice and reproductive isolation. The review focuses primarily on gustatory and non-volatile signals in Drosophila. Premating isolation is prevalent among closely related species. In Drosophila, preference for conspecifics against other species in mate choice underlies premating isolation, and such preference relies on contact chemosensory communications between a female and male along with other biological factors. For example, although D. simulans and D. melanogaster are sibling species that yield hybrids, their premating isolation is maintained primarily by the contrasting effects of 7,11-heptacosadiene (7,11-HD), a predominant female pheromone in D. melanogaster, on males of the two species: it attracts D. melanogaster males and repels D. simulans males. The contrasting preference for 7,11-HD in males of these two species is mainly ascribed to opposite effects of 7,11-HD on neural activities in the courtship decision-making neurons in the male brain: 7,11-HD provokes both excitatory and inhibitory inputs in these neurons and differences in the balance between the two counteracting inputs result in the contrasting preference for 7,11-HD, i.e., attraction in D. melanogaster and repulsion in D. simulans. Introduction of two double bonds is a key step in 7,11-HD biosynthesis and is mediated by the desaturase desatF, which is active in D. melanogaster females but transcriptionally inactivated in D. simulans females. Thus, 7,11-HD biosynthesis diversified in females and 7,11-HD perception diversified in males, yet it remains elusive how concordance of the changes in the two sexes was attained in evolution.

scholarly journals Chemical signals act as the main reproductive barrier between sister and mimeticHeliconiusbutterflies

2019 ◽  
Author(s):  
M.F. González-Rojas ◽  
K. Darragh ◽  
J Robles ◽  
M. Linares ◽  
S Schulz ◽  
...  
Keyword(s):  
Reproductive Isolation ◽  
Related Species ◽  
Mate Recognition ◽  
Geographic Region ◽  
Reproductive Barrier ◽  
Colour Pattern ◽  
Chemical Profile ◽  
Closely Related Species ◽  
Wing Colour ◽  
Behavioural Experiments

ABSTRACTColour pattern has been long recognised as the trait that drives mate recognition betweenHeliconiusspecies that are phylogenetically close. However, when this cue is compromised such as in cases of mimetic, sympatric and closely related species, alternative mating signals must evolve to ensure reproductive isolation and species integrity. The closely related speciesHeliconius melpomene malletiandH. timareta florencia, occur in the same geographic region and despite being co-mimics they display strong reproductive isolation. In order to test which cues differ between species, and therefore potentially contribute to reproductive isolation, we quantified differences in wing phenotype and male chemical profile. As expected, wing colour pattern was indistinguishable between the two species while the chemical profile of their male sex pheromones showed marked differences. We then conducted behavioural experiments to study the importance of these signals in mate recognition by females. In agreement with our previous results, we found that pheromones and not wing colour pattern drive the preference of females by conspecific males. In addition, experiments with hybrid males and females suggested an important genetic component for both pheromone production and preference. Altogether, these results suggest that pheromones are the major reproductive barrier opposing gene flow between these two sister and co-mimic species.

scholarly journals New records of two Lutjanus species (Teleostei: Perciformes: Lutjanidae) with re-description of six lutjanids from Saint Martin’s Island of the Bay of Bengal, Bangladesh

2018 ◽  
Vol 46 (2) ◽  
pp. 239-253 ◽  
Author(s):  
Shilpi Saha ◽  
Sanjay Chakraborty ◽  
Subrina Sehrin ◽  
Abdullah Al Masud ◽  
Kazi Ahsan Habib ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Bay Of Bengal ◽  
Related Species ◽  
Genetic Divergence ◽  
New Records ◽  
Morphological Differentiation ◽  
Morphological Characters ◽  
Mitochondrial Cytochrome ◽  
Closely Related Species ◽  
Mitochondrial Cytochrome Oxidase

Investigations on Snapper fish of the genus Lutjanus were conducted from October 2015 to April 2016 in the coral ecosystem of St. Martin’s Island, Bangladesh. Twenty one individuals of 8 species of Lutjanus were collected from local fishermen. Both morphological characters and DNA barcoding approach by mitochondrial cytochrome oxidase I subunit (COI) were used to confirm the identification of all species. Present study recorded the first national occurrence of two reef associated Lutjanus species (L. xanthopinnis and L. indicus). In addition six species (L. rivulatus, L. lutjanus, L. vitta, L. lemniscatus, L. fulviflamma and L. johnii) were re-described. Distinct morphological differentiation were found between more closely related species L. xanthopinnis, L. vitta and L. lutjanus. Three different appearances of L. johnii, two different appearances of L. rivulatus and L. lemniscatus were confirmed as same species. Phylogenetic analysis showed monophylotic clade for conspecific individuals and paraphyletic clade for congeneric individuals. Average genetic divergence for intraspecific level was 1.5% and 12.5% for interspecific level. Current study increased the number of Lutjanus species in Bangladesh from 15 to 17 and extended the distribution range of those new recorded species in northeastern part of the Bay of Bengal. Bangladesh J. Zool. 46(2): 239-253, 2018

scholarly journals Reproductive isolation between Anastrepha bistrigata and A. striata (Diptera, Tephritidae)

1997 ◽  
Vol 20 (4) ◽  
pp. 583-585 ◽  
Author(s):  
Denise Selivon ◽  
João S. Morgante
Keyword(s):  
Reproductive Isolation ◽  
Related Species ◽  
Closely Related Species ◽  
Prezygotic Isolation ◽  
Laboratory Conditions ◽  
Hourly Distribution ◽  
First Time

The reproductive isolation between two closely related species, Anastrepha bistrigata and A. striata, was studied in the laboratory. Interespecific copulation attempts were observed, but examination of the spermathecae showed that sperm transference did not occur, even after a prolonged period of contact between the mating pairs. These results indicate prezygotic isolation. The analysis of the hourly distribution of mating activities under laboratory conditions, here described for the first time for A. bistrigata, clearly showed differences for the two species, the activities being concentrated in the afternoon period for A. striata and in the morning for A. bistrigata

scholarly journals A Revision of the Ant Genus Rhytidoponera (Hymenoptera: Formicidae) in New Caledonia

1984 ◽  
Vol 32 (1) ◽  
pp. 131 ◽  
Author(s):  
PS Ward
Keyword(s):  
New Species ◽  
Related Species ◽  
New Caledonia ◽  
Morphological Differentiation ◽  
Forest Edge ◽  
Nest Architecture ◽  
Closely Related Species ◽  
Wide Range ◽  
Species Groups ◽  
Group Species

In this revision of the genus Rhytidoponera on the island of New Caledonia, 18 species are recognized: seven previously described taxa (acanthoponeroides Viehmeyer, atropurpurea Emery, fulgens Emery, numeensis Andre, pulchella Emery, versicolor Brown, and wilsoni Brown) and 11 new species (aquila sp.nov., arborea sp.nov., depilis sp.nov., insularis sp.nov., koumensis sp.nov., litoralis sp.nov., luteipes sp.nov., mimica sp.nov., nitidiventris sp.nov., opaciventris sp.nov., and terrestris sp.nov.). All of these species are endemic (except perhaps terrestris, for which there is a questionable record from Vanuatu), and they segregate into four species-groups: acanthoponeroides group (one species), fulgens group (four species), numeensis group (three species) and pulchella group (ten species). Alate queens have not been found in any species, suggesting that colonies are entirely worker-reproductive. The behaviour and nest architecture of species in the pulchella group indicates specialization as foliage-foragers on understorey and forest edge vegetation, in contrast to the ground-foraging tendencies of the remaining species. Some pulchella-group species are involved in mimicry complexes with other ants and other foliage- frequenting arthropods. Closely related species of New Caledonian Rhytidoponera are usually distributed allopatrically, and conspecific populations exhibit a wide range of morphological differentiation.

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