A bio-syringe mechanism and the pattern of genital correspondence in the weevil genus Sitona (Coleoptera: Curculionidae): an approach to the great interest of Sharp and Muir

Zootaxa ◽  
2021 ◽  
Vol 4933 (4) ◽  
pp. 514-526
Author(s):  
MAHMOOD ALICHI
Keyword(s):  
Bursa Copulatrix ◽  
Genital Morphology ◽  
Male And Female ◽  
Male Transfer ◽  
Species Specific ◽  
Thickened Wall ◽  
Isolating Mechanism ◽  
Transfer Apparatus ◽  
Female Genital

The remarkable diversity in male and female genital morphology among the species of Sitona Germar might contribute to the understanding of the structural “lock-and-key” isolating mechanism. Recently, it has been found that in spite of the phallic sizes in male weevils of the genus Sitona, their internal sacs should precisely match with the vaginal infoldings of conspecific females. The present research also deals with the male transfer apparatus, which is a special organ for insemination procedure inside the female bursa copulatrix. A wedge-shaped structure with a fused ejaculatory pump was distinguished as the bio-syringe part of the transfer apparatus in the examined species. Two paired sclerites of the transfer apparatus support the bio-syringe, so that it would slide freely between them and lock precisely over the opening of the spermathecal duct inside the bursa copulatrix of the female. In this phenomenon, several new structures were also found, including a bursal sclerite (“bursal disc”) and a pair of miniature pouches (“bursal plugs”) which are embedded in the thickened wall of the female bursal lumen. These findings explain how the shapes of male and female copulatory organs are normally species-specific and provide an opportunity for understanding the role of the structural lock-and-key isolating mechanism. 

scholarly journals Coevolution of Male and Female Genital Morphology in Waterfowl

PLoS ONE ◽  
2007 ◽  
Vol 2 (5) ◽  
pp. e418 ◽  
Author(s):  
Patricia L.R. Brennan ◽  
Richard O. Prum ◽  
Kevin G. McCracken ◽  
Michael D. Sorenson ◽  
Robert E. Wilson ◽  
...  
Keyword(s):  
Genital Morphology ◽  
Male And Female ◽  
Female Genital

scholarly journals Are hemipenial traits under sexual selection in Tropidurus lizards? Hemipenial development, male and female genital morphology, allometry and coevolution in Tropidurus torquatus (Squamata: Tropiduridae)

PLoS ONE ◽  
2019 ◽  
Vol 14 (7) ◽  
pp. e0219053 ◽  
Author(s):  
Anderson Kennedy Soares De-Lima ◽  
Ingrid Pinheiro Paschoaletto ◽  
Lorena de Oliveira Pinho ◽  
Piktor Benmamman ◽  
Julia Klaczko
Keyword(s):  
Sexual Selection ◽  
Genital Morphology ◽  
Male And Female ◽  
Female Genital

Weak premating isolation betweenClitarchusstick insect species despite divergent male and female genital morphology

2019 ◽  
Vol 32 (5) ◽  
pp. 398-411 ◽  
Author(s):  
Shelley S. Langton‐Myers ◽  
Gregory I. Holwell ◽  
Thomas R. Buckley
Keyword(s):  
Insect Species ◽  
Genital Morphology ◽  
Premating Isolation ◽  
Male And Female ◽  
Female Genital

scholarly journals Four new species of the trapdoor spider genus Conothele Thorell, 1878 (Araneae, Halonoproctidae) from China

ZooKeys ◽  
2019 ◽  
Vol 833 ◽  
pp. 133-150
Author(s):  
Hao Liu ◽  
Xin Xu ◽  
Zengtao Zhang ◽  
Fengxiang Liu ◽  
Daiqin Li
Keyword(s):  
New Species ◽  
Nucleotide Substitution ◽  
Mitochondrial Gene ◽  
Genetic Distances ◽  
Jiangxi Province ◽  
Hainan Province ◽  
Genital Morphology ◽  
Species Specific ◽  
Specific Nucleotide ◽  
Female Genital

Herein four species of the trapdoor spider genus Conothele Thorell, 1878 collected from China are described as new to science based on the female genital morphology: C.baishasp. n. (Hainan Province), C.baotingsp. n. (Hainan Province), C.linzhisp. n. (Tibet), and C.jinggangshansp. n. (Jiangxi Province). For two Hainan species, C.baishasp. n. and C.baotingsp. n., between which it is difficult to distinguish solely based on female genital morphology, additional diagnoses derived from species-specific nucleotide substitution information and genetic distances using the mitochondrial gene, cytochrome c oxidase subunit I are provided.

scholarly journals Experimental coevolution of male and female genital morphology

2011 ◽  
Vol 2 (1) ◽  
Author(s):  
Leigh W. Simmons ◽  
Francisco Garcia-Gonzalez
Keyword(s):  
Genital Morphology ◽  
Male And Female ◽  
Female Genital

scholarly journals Intraspecific evidence from guppies for correlated patterns of male and female genital trait diversification

2011 ◽  
Vol 278 (1718) ◽  
pp. 2611-2620 ◽  
Author(s):  
Jonathan P. Evans ◽  
Clelia Gasparini ◽  
Gregory I. Holwell ◽  
Indar W. Ramnarine ◽  
Trevor E. Pitcher ◽  
...  
Keyword(s):  
Poecilia Reticulata ◽  
Natural Populations ◽  
Copulatory Organ ◽  
Genital Morphology ◽  
Linear Measurements ◽  
Male And Female ◽  
Correlated Patterns ◽  
Livebearing Fish ◽  
Female Genital ◽  
Male Genital

The role of sexual selection in fuelling genital evolution is becoming increasingly apparent from comparative studies revealing interspecific divergence in male genitalia and evolutionary associations between male and female genital traits. Despite this, we know little about intraspecific variance in male genital morphology, or how male and female reproductive traits covary among divergent populations. Here we address both topics using natural populations of the guppy, Poecilia reticulata , a livebearing fish that exhibits divergent patterns of male sexual behaviour among populations. Initially, we performed a series of mating trials on a single population to examine the relationship between the morphology of the male's copulatory organ (the gonopodium) and the success of forced matings. Using a combination of linear measurements and geometric morphometrics, we found that variation in the length and shape of the gonopodium predicted the success of forced matings in terms of the rate of genital contacts and insemination success, respectively. We then looked for geographical divergence in these traits, since the relative frequency of forced matings tends to be greater in high-predation populations. We found consistent patterns of variation in male genital size and shape in relation to the level of predation, and corresponding patterns of (co)variation in female genital morphology. Together, these data enable us to draw tentative conclusions about the underlying selective pressures causing correlated patterns of divergence in male and female genital traits, which point to a role for sexually antagonistic selection.

scholarly journals The Importance of Biosemiotics for Morphology

Biosemiotics ◽  
2020 ◽  
Author(s):  
Joachim Schult ◽  
Onno Preik ◽  
Stefan Kirschner
Keyword(s):  
Essential Role ◽  
Scientific Practice ◽  
Morphological Characters ◽  
Point Of View ◽  
Nephila Clavipes ◽  
Male And Female ◽  
Complex Interactions ◽  
Intraspecific Communication ◽  
Species Specific ◽  
Female Genital

AbstractMorphology and its relevance for systematics is a promising field for the application of biosemiotic principles in scientific practice. Genital coupling in spiders involves very complex interactions between the male and female genital structures. As exemplified by two spider species, Nephila clavipes and Nephila pilipes ssp. fenestrata, from a biosemiotic point of view the microstructures of the male bulb’s embolus and the corresponding female epigynal and vulval parts form the morphological zone of an intraspecific communication and sign-interpreting process that is one of the prerequisites for sperm transfer. Hence these morphological elements are of high taxonomic value, as they play an essential role in mating and fertilization and consequently in establishing and preserving a reproductive community. Morphology clearly benefits from a biosemiotic approach, as biosemiotics helps to sort out species-specific morphological characters and to avoid problematic typological interpretations.

QTL for the species-specific male and female genital morphologies in Ohomopterus ground beetles

2010 ◽  
Vol 19 (23) ◽  
pp. 5231-5239 ◽  
Author(s):  
MASATAKA SASABE ◽  
YASUOKI TAKAMI ◽  
TEIJI SOTA
Keyword(s):  
Ground Beetles ◽  
Male And Female ◽  
Species Specific ◽  
Female Genital
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