venation
Quick Summary
Venation refers to the arrangement or system of veins within a biological structure, such as a leaf or an insect's wing. In leaves, venation patterns are often pinnate, meaning the veins diverge and do not typically merge. However, some ferns exhibit netted or reticulate venation, where networks and areolae (areas enclosed by veins) develop. These patterns can vary, with some featuring free included veinlets within loops, while others display a herringbone pattern that may have evolved from the fusion of leaf segments. The term "venational" is an adjective used to describe something related to venation.123
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LepidopteraThorax…forewing is thickened, with stronger veins, while the outer and posterior (anal) wing section margins are thinner and weaker. This accords with the function of the wings as airfoils having a stiff leading edge and a flexible trailing edge.
Read More…forewing is thickened, with stronger veins, while the outer and posterior (anal) wing section margins are thinner and weaker. This accords with the function of the wings as airfoils having a stiff leading edge and a flexible trailing edge.
Read More- LepidopteraDistinguishing taxonomic features
The venation of the wings is perhaps the most important single criterion for establishing both differences and relationships in the classification. However, venation patterns must be considered in terms of the evolution of these patterns from primitive to advanced conditions within individual phyletic lines. The most…
Read MoreThe venation of the wings is perhaps the most important single criterion for establishing both differences and relationships in the classification. However, venation patterns must be considered in terms of the evolution of these patterns from primitive to advanced conditions within individual phyletic lines. The most…
Read More