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2,283 results for “Male genitalia”
Figures 29–32. Bahamas Pterophoridae male genitalia. 29a in Additions to the plume moth fauna of The Bahamas (Lepidoptera: Pterophoridae) with description of four new species
Figures 29–32. Bahamas Pterophoridae male genitalia. 29a) Megalorhipida leucodactylus, slide DM 2160. 29b) phallus, same individual. 30a) Dejongia californicus, slide DM 2164. 30b) phallus, same individual. 31a) Exelastis pumilio, slide DM 2163. 31b) phallus, same individual. 32) Exelastis dowi, slide DM 2165, phallus in situ.
Figure 45. Eosphaerophoria brunettii, male genitalia a left lateral view b right superior lobe, dorsal view c tergite 9 in The flower fly genus Eosphaerophoria Frey (Diptera, Syrphidae)
Figure 45. Eosphaerophoria brunettii, male genitalia a left lateral view b right superior lobe, dorsal view c tergite 9, cerci and surstyli, dorsal view.
Figs 54–60. Male genitalia. 54–55 in Depressariidae (Lepidoptera) of the Russian Altai Mountains: new species, new records and updated checklist
Figs 54–60. Male genitalia. 54–55 – Agonopterix kyzyltashensis sp. nov., paratypes, Russia, S Ural, details in text; 56–57 – A. pullella Hannemann, 1971: 56 – Mongolia, Cojbalsan Aimak, 15 km north of Somon Galuut, 17.viii.1965, Z. Kaszab leg. (HNHM); 57 – Russia, Buryatia, 35 km south W of Ulan Ude, 17.vii.1996, Kullberg & Jalava leg. (ZMUH); 58 – A. pallorella (Zeller, 1839), Lower Austria, Perchtodsdorf, 3.vi.2010, P. Buchner leg. (RCPB); 59 – A. straminella (Staudinger, 1870), Tunisia, Jebel Chambi, 23.x.2009, L. Lehmann leg. (RCGD); 60 – A. kaekeritziana (Linnaeus, 1767), Lower Austria, Fischawiesen, 22.vi.2011, W. Stark leg. (RCWS). Scale bar for figs 54–57 = 1 mm.
Data from: Discovery of a new ant species of the elusive termitophilous genus Metapone in Singapore (Hymenoptera: Formicidae: Myrmicinae), with first detailed description of male genitalia of the genus
A new species of the rare ant genus Metapone – Metapone murphyi – is described based on aged museum material: a single nest series (workers, queens and males) collected from a decayed coconut (tree) stump on Pulau Sakra – previously an offshore island south of mainland Singapore. Workers can be distinguished from other named congeners mainly by the following characters: 1) subpetiolar lamella subrectangular; 2) short subpetiolar edge and roundly obtuse subpetiolar angle; 3) outer margin of posterior subpetiolar face forming a continuous, U-shaped, translucent, laminate carina; 4) subtrapezoidal petiole in dorsal view with extended blunt tooth-like posterolateral corners. Detailed description and illustrations of the male genitalia are given for the first time in the genus. The key to Asian species of Metapone is updated to include the new species.
Figs 31-34. Oratostylum lepidum Ricardo. 31. Lebombo male head. 32-34. Lectotype male genitalia. 32. Lateral. 33. Ventral. 34 in The Genus Daspletis Loew, 1858 And The Description Of Two New Genera, Anasillomos And Remotomyia (Diptera: Asilidae: Stenopogoninae)
Figs 31-34. Oratostylum lepidum Ricardo. 31. Lebombo male head. 32-34. Lectotype male genitalia. 32. Lateral. 33. Ventral. 34. Dorsal.
Figs 43-45. Remotomyia longipalpus spec. nov. holotype male genitalia. 43. Lateral. 44. Ventral. 45 in The Genus Daspletis Loew, 1858 And The Description Of Two New Genera, Anasillomos And Remotomyia (Diptera: Asilidae: Stenopogoninae)
Figs 43-45. Remotomyia longipalpus spec. nov. holotype male genitalia. 43. Lateral. 44. Ventral. 45. Dorsal.
FIGURE 2. Male genitalia. A in A new cave species of the genus Gymnaetoides (Rhaphidophoridae: Aemodogryllinae: Aemodogryllini) from Guizhou, China
FIGURE 2. Male genitalia. A. genitalia, dorsal view; B. genitalia, ventral view.
Evolution of male genitalia in the Drosophila repleta species group (Diptera: Drosophilidae)
<p>The Drosophila repleta group comprises more than one hundred species that inhabit several environments in the Neotropics and use different hosts as rearing and feeding resources. Rather homogeneous in their external morphology, they are generally distinguished by the male genitalia, their fastest evolving morphological trait, constituting an excellent model to study patterns of genital evolution in the context of a continental adaptive radiation. Although much is known about the evolution of animal genitalia at population level, surveys on macroevolutionary scale of this phenomenon are scarce. Herein, in order to elucidate the macroevolutionary patterns of genital evolution through deep time and large continental scales, a suite of phylogenetic comparative methods was used in this group for the first time. Our results indicate that male genital size and some aspects of shape have been evolving by speciational evolution, probably due to the microevolutionary processes involved in species mate recognition. In contrast, several features of the aedeagus shape seemed to have evolved stochastically and thereby in a gradual fashion, with heterogeneous evolutionary phenotypic rates among clades, however. In general, the tempo of the evolution of aedeagus morphology was constant from the origin of the group until the Pliocene, when it accelerated in some clades that diversified mainly in this period. The incidence of novel ecological conditions in the tempo of aedeagus evolution and the relationship between species mate recognition and speciation in the Drosophila repleta group are discussed.</p>
Data from: Quantitative genetic insights into the coevolutionary dynamics of male and female genitalia
The spectacular variability that typically characterizes male genital traits has largely been attributed to the role of sexual selection. Among the evolutionary mechanisms proposed to account for this diversity, two processes in particular have generated considerable interest. On the one hand, females may exploit postcopulatory mechanisms of selection to favour males with preferred genital traits (cryptic female choice; CFC), while on the other hand females may evolve structures or behaviours that mitigate the direct costs imposed by male genitalia (sexual conflict; SC). A critical but rarely explored assumption underlying both processes is that male and female reproductive traits coevolve, either via the classic Fisherian model of preference-trait coevolution (CFC) or through sexually antagonistic selection (SC). Here, we provide evidence for this prediction in the guppy (Poecilia reticulata), a polyandrous livebearing fish in which males transfer sperm internally to females via consensual and forced matings. Our results from a paternal half-sibling breeding design reveal substantial levels of additive genetic variation underlying male genital size and morphology—two traits known to predict mating success during non-consensual matings. Our subsequent finding that physically interacting female genital traits exhibit corresponding levels of genetic (co)variation reveals the potential intersexual coevolutionary dynamics of male and female genitalia, thereby fulfilling a fundamental assumption underlying CFC and SC theory.
Data from: Artificial selection on male genitalia length alters female brain size
Male harassment is a classic example of how sexual conflict over mating leads to sex-specific behavioural adaptations. Females often suffer significant costs from males attempting forced copulations, and the sexes can be in an arms race over male coercion. Yet, despite recent recognition that divergent sex-specific interests in reproduction can affect brain evolution, sexual conflict has not been addressed in this context. Here, we investigate whether artificial selection on a correlate of male success at coercion, genital length, affects brain anatomy in males and females. We analysed the brains of eastern mosquitofish (Gambusia holbrooki), which had been artificially selected for long or short gonopodium, thereby mimicking selection arising from differing levels of male harassment. By analogy to how prey species often have relatively larger brains than their predators, we found that female, but not male, brain size was greater following selection for a longer gonopodium. Brain subregion volumes remained unchanged. These results suggest that there is a positive genetic correlation between male gonopodium length and female brain size, which is possibly linked to increased female cognitive ability to avoid male coercion. We propose that sexual conflict is an important factor in the evolution of brain anatomy and cognitive ability.
Data from: Genetic architecture and functional characterization of genes underlying the rapid diversification of male external genitalia between Drosophila simulans and Drosophila mauritiana
Male sexual characters are often among the first traits to diverge between closely related species and identifying the genetic basis of such changes can contribute to our understanding of their evolutionary history. However, little is known about the genetic architecture or the specific genes underlying the evolution of male genitalia. The morphology of the claspers, posterior lobes and anal plates exhibit striking differences between Drosophila mauritiana and Drosophila simulans. Using QTL and introgression-based high-resolution mapping, we identified several small regions on chromosome arms 3L and 3R that contribute to differences in these traits. However, we found that the loci underlying the evolution of clasper differences between these two species are independent from those that contribute to posterior lobe and anal plate divergence. Furthermore, while most of the loci affect each trait in the same direction and act additively, we also found evidence for epistasis between loci for clasper bristle number. In addition, we conducted an RNAi screen in D. melanogaster to investigate if positional and expression candidate genes located on chromosome 3L, are also involved in genital development. We found that six of these genes, including components of Wnt signaling and male-specific lethal 3 (msl3), regulate the development of genital traits consistent with the effects of the introgressed regions where they are located and that thus represent promising candidate genes for the evolution these traits.
FIGURE 25. Pterilia signata Distant, male genitalia. 25a in Systematic notes on tribes in the family Caliscelidae (Hemiptera: Fulgoroidea) with the description of new taxa from Palaearctic and Oriental Regions
FIGURE 25. Pterilia signata Distant, male genitalia. 25a, anal tube, penis, and connective, in
FIGURE 2 in A review of the genus Epitrichius Tagawa, with an analysis of the internal sac armature of the male genitalia (Coleoptera: Scarabaeidae: Cetoniinae)
FIGURE 2. Lateral side of pronotum of Epitrichius shinshuingensis, scale bar = 2.0 mm.
FIGURES 8–12 in A review of the genus Epitrichius Tagawa, with an analysis of the internal sac armature of the male genitalia (Coleoptera: Scarabaeidae: Cetoniinae)
FIGURES 8–12. Variation in the shape of parameres of Epitrichius bowringii.
FIGURE 23–25. Damalis vitripennis, male genitalia. 23 in Robber flies (Diptera: Asilidae) of South Korea. Parts VI – VIII. South Korean species of the Subfamilies Dasypogoninae, Dioctriinae and Trigonomiminae
FIGURE 23–25. Damalis vitripennis, male genitalia. 23, lateral; 24, ventral; 25, gonopod, ventral.
FIGURE 2. Male genitalia, ventral. A in New species and new distribution records of Lestremiinae, Micromyinae and Porricondylinae (Diptera: Cecidomyiidae) in Sweden
FIGURE 2. Male genitalia, ventral. A: Aprionus karlssonorum. B: Aprionus lindgrenae. Scale 0.05 mm.
FIGURE 1. Male genitalia, ventral. A in New species and new distribution records of Lestremiinae, Micromyinae and Porricondylinae (Diptera: Cecidomyiidae) in Sweden
FIGURE 1. Male genitalia, ventral. A: Aprionus forshagei. B: Aprionus gustavssoni. Scale 0.05 mm.
FIGURE 6. Naganda radialis. A-B. Female. C in A new species of Niganda Moore, 1879 from Thailand, with descriptions of variation in male genitalia and female facies of N. radialis Moore (Lepidoptera: Notodontidae, Ceirinae)
FIGURE 6. Naganda radialis. A-B. Female. C. Male.
FIGURE 3 in A new species of Niganda Moore, 1879 from Thailand, with descriptions of variation in male genitalia and female facies of N. radialis Moore (Lepidoptera: Notodontidae, Ceirinae)
FIGURE 3. Biotope of N. phichai and N. radialis.
FIGURE 7 in A new species of Niganda Moore, 1879 from Thailand, with descriptions of variation in male genitalia and female facies of N. radialis Moore (Lepidoptera: Notodontidae, Ceirinae)
FIGURE 7. Random sample of N. radialis uncus tips.
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