Myoglossata

Definition

A clade of Lepidoptera (butterflies and moths) within the suborder Glossata, comprising the family Neopseustidae and the more diverse clade Neolepidoptera. Myoglossata is diagnosed by the presence of intrinsic galeal muscles—additional musculature within the galeae that enables more refined proboscis control and is absent in more basal glossatan lineages. This morphological innovation is associated with the elaboration of the proboscis into a specialized sucking structure.

Etymology

From Greek myo- (muscle) + glossa (tongue), referring to the intrinsic musculature of the galeae (proboscis components).

Example

The clade Myoglossata includes both the relict family Neopseustidae and the vast majority of living Lepidoptera (Neolepidoptera), with the intrinsic galeal muscles providing enhanced proboscis flexibility for accessing diverse nectar sources and other liquid foods.

Related Terms

• Glossata
• Neolepidoptera
• Neopseustidae
• Ditrysia
• Heteroneura
• Proboscis
• Galea

Usage Notes

Myoglossata represents a node-based clade uniting Neopseustidae and Neolepidoptera; it is not assigned a formal Linnaean rank. The presence of intrinsic galeal muscles serves as the primary synapomorphy distinguishing Myoglossata from more basal Glossata such as the family Micropterigidae, which retains extrinsic proboscis musculature only. The term is used primarily in lepidopteran phylogenetics and comparative morphology.