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9 results for “Diasemopsis”
FIGURE 22 in A description of a new species of Diasemopsis (Diptera, Diopsidae) from the Comoro Islands with morphological, molecular and allometric data
FIGURE 22: Bayesian phylogeny of Diasemopsis species, rooted with Teleopsis and Sphyracephala species. Posterior probabilities are given for each branch.
FIGURES 13–16 in A description of a new species of Diasemopsis (Diptera, Diopsidae) from the Comoro Islands with morphological, molecular and allometric data
FIGURES 13–16: D. comoroensis male genitalia. 13: ventral view, 14: detailed ventral view with surstyli, gonopods, cerci (no hairs on cerci drawn), 15: detailed lateral view with gonopod and paramere, 16: lateral view with aedeagal apodeme, hypandrium and epandrium. Scale bar 0.4 mm for Fig 13, 16, 0.2 mm for Fig 14 and 0.1 mm for Fig 15.
FIGURES 1–2 in A description of a new species of Diasemopsis (Diptera, Diopsidae) from the Comoro Islands with morphological, molecular and allometric data
FIGURES 1–2: D. comoroensis internal female genital organs. 1. D. comoroensis female reproductive tract (ovaries omitted). Scale bar 250 m. 2. Detail of genital papilla. Arrows indicate the separate openings of spermathecal ducts (right) and accessory gland ducts (left).
FIGURE 21 in A description of a new species of Diasemopsis (Diptera, Diopsidae) from the Comoro Islands with morphological, molecular and allometric data
FIGURE 21: Eye span allometry in D. comoroensis and D. meigenii. = male D. comoroensis, = female D. comoroensis, = male D. meigenii, = female D. meigenii. Leastsquares regression lines are given for heuristic purposes.
FIGURES 9 & 10 in A description of a new species of Diasemopsis (Diptera, Diopsidae) from the Comoro Islands with morphological, molecular and allometric data
FIGURES 9 & 10: D. comoroensis (9) and D. meigenii (10) wings. The larger apical band is clearly visible in the D. meigenii wing, spanning between the M and R2+3 veins.
FIGURES 17–20 in A description of a new species of Diasemopsis (Diptera, Diopsidae) from the Comoro Islands with morphological, molecular and allometric data
FIGURES 17–20: D. meigenii male genitalia. 9: ventral view, 10: detailed ventral view with surstyli, gonopods, cerci (no hairs on cerci drawn), 11: detailed lateral view with gonopod and paramere, 12: lateral view with aedeagal apodeme, hypandrium and epandrium. Scale bar 0.4 mm for Fig 17, 20, 0.2 mm for Fig 18 and 0.1 mm for Fig 19.
FIGURES 3–8 in A description of a new species of Diasemopsis (Diptera, Diopsidae) from the Comoro Islands with morphological, molecular and allometric data
FIGURES 3–8: 3: Multichambered ventral receptacle. Arrow indicates the tubular entrance. 4: Ventral sclerotized ring. Arrow indicates specialized epithelium. 5: Detail of ventral receptacle. Arrows indicate coiled spermatozoa within the cuticular chambers. 6: Spermatheca with denticles. 7: Spermatheca. Arrows indicate cuticular end apparatus of epithelial gland cells. 8: Accessory gland. Arrows indicate cuticular end apparatus of epithelial gland cells.
Data from: Sexual traits are sensitive to genetic stress and predict extinction risk in the stalk-eyed fly, Diasemopsis meigenii
The handicap principle predicts that sexual traits are more susceptible to inbreeding depression than nonsexual traits. However, this hypothesis has received little testing and results are inconsistent. We used 11 generations of full-sibling mating to test the effect of inbreeding on sexual and nonsexual traits in the stalk-eyed fly Diasemopsis meigenii. Consistent with the theoretical predictions, the male sexual trait (eyespan) decreased more than nonsexual traits (female eyespan and male wing length), even after controlling for body size variation. In addition, male eyespan was a reliable predictor of line extinction, unlike other nonsexual traits. After 11 generations, inbred lines were crossed to generate inbred and outbred families. All morphological traits were larger in outbred individuals than inbred individuals. This heterosis was greater in male eyespan than in male wing length, but not female eyespan. The elevated response in male eyespan to genetic stress mirrored the result found using environmental stress during larval development and suggests that common mechanisms underlie the patterns observed. Overall, these results support the hypothesis that male sexual traits suffer more from inbreeding depression than nonsexual traits and are in line with predictions based on the handicap principle.
Data from: Sexual traits are sensitive to genetic stress and predict extinction risk in the stalk-eyed fly, Diasemopsis meigenii
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