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The wing pattern of Moerarchis Durrant, 1914 (Lepidoptera: Tineidae) clarifies transitions between predictive models

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ABSTRACT

The evolution of wing pattern in Lepidoptera is a popular area of inquiry but few studies have examined microlepidoptera, with fewer still focusing on intraspecific variation. The tineid genus Moerarchis Durrant, 1914 includes two species with high intraspecific variation of wing pattern. A subset of the specimens examined here provide, to my knowledge, the first examples of wing patterns that follow both the ‘alternating wing-margin’ and ‘uniform wing-margin’ models in different regions along the costa. These models can also be evaluated along the dorsum of Moerarchis, where a similar transition between the two models can be seen. Fusion of veins is shown not to effect wing pattern, in agreement with previous inferences that the plesiomorphic location of wing veins constrains the development of colour pattern. The significant correlation between wing length and number of wing pattern elements in Moerarchis australasiella shows that wing size can act as a major determinant of wing pattern complexity. Lastly, some M. australasiella specimens have wing patterns that conform entirely to the ‘uniform wing-margin’ model and contain more than six bands, providing new empirical insight into the century-old question of how wing venation constrains wing patterns with seven or more bands.

No MeSH data available.


A hypothetical schematic showing a transition between the ‘uniform’ and ‘alternating wing margin’ models, based on figure 5c.
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RSOS161002F8: A hypothetical schematic showing a transition between the ‘uniform’ and ‘alternating wing margin’ models, based on figure 5c.

Mentions: The generalization can be made that Moerarchis wing patterns tend to follow the ‘uniform wing-margin’ model toward the base of the wing and the ‘alternating wing-margin’ model towards the apex, with the boundary between these two models shifting within the region where the Rs veins terminate along the costa. Because different pattern elements on the very same wing can follow both variants of the ‘wing-margin’ model, these two variants should be conceptualized as endpoints along a single continuum rather than mutually exclusive character states for entire wings or species (figure 8).Figure 8.


The wing pattern of Moerarchis Durrant, 1914 (Lepidoptera: Tineidae) clarifies transitions between predictive models
A hypothetical schematic showing a transition between the ‘uniform’ and ‘alternating wing margin’ models, based on figure 5c.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5383847&req=5

RSOS161002F8: A hypothetical schematic showing a transition between the ‘uniform’ and ‘alternating wing margin’ models, based on figure 5c.
Mentions: The generalization can be made that Moerarchis wing patterns tend to follow the ‘uniform wing-margin’ model toward the base of the wing and the ‘alternating wing-margin’ model towards the apex, with the boundary between these two models shifting within the region where the Rs veins terminate along the costa. Because different pattern elements on the very same wing can follow both variants of the ‘wing-margin’ model, these two variants should be conceptualized as endpoints along a single continuum rather than mutually exclusive character states for entire wings or species (figure 8).Figure 8.

View Article: PubMed Central - PubMed

ABSTRACT

The evolution of wing pattern in Lepidoptera is a popular area of inquiry but few studies have examined microlepidoptera, with fewer still focusing on intraspecific variation. The tineid genus Moerarchis Durrant, 1914 includes two species with high intraspecific variation of wing pattern. A subset of the specimens examined here provide, to my knowledge, the first examples of wing patterns that follow both the ‘alternating wing-margin’ and ‘uniform wing-margin’ models in different regions along the costa. These models can also be evaluated along the dorsum of Moerarchis, where a similar transition between the two models can be seen. Fusion of veins is shown not to effect wing pattern, in agreement with previous inferences that the plesiomorphic location of wing veins constrains the development of colour pattern. The significant correlation between wing length and number of wing pattern elements in Moerarchis australasiella shows that wing size can act as a major determinant of wing pattern complexity. Lastly, some M. australasiella specimens have wing patterns that conform entirely to the ‘uniform wing-margin’ model and contain more than six bands, providing new empirical insight into the century-old question of how wing venation constrains wing patterns with seven or more bands.

No MeSH data available.