A fold (jugum) of the membrane at the base of each wing is a characteristic feature.

The jugum is more highly developed in some other Orthoptera, as in the Mantidae.

At the base of the forewing is a jugum, a small lobe that joins the fore- and hindwings during flight.

Some moths have a lobe on the forewing called a jugum that helps in coupling with the hindwing.

There is a region of interlocking sclerites that holds the jugum and scutellum on the middle thoracic segment together.

There are references to the yoke or jugum in Kentish medieval records and in the Domesday survey.

The true jugum of the acridid wing is represented only by the small membrane (Ju) mesad of the last vannal vein.

In most higher Lepidoptera, a pseudofrenulum occurs only in some lower families (Braun, 1919), the jugum is almost invariably lost and the frenulum usually assumes great importance (Braun, 1924).

The more primitive groups have an enlarged lobe-like area near the basal posterior margin (i.e. at the base of the forewing) called a jugum, that folds under the hindwing during flight.

A specific aspect of the use of the monastic scapular from its earliest days was obedience and the term jugum Christi, i.e. "yoke of Christ", was used to refer to it.

Pliny the Elder, in Natural History, places the eastern regions of the Hercynium jugum, the "Hercynian mountain chain", in Pannonia (present-day Hungary) and Dacia (present-day Romania.

The jugum on the forewings of the adult is an archaic wing coupling mechanism; further primitive characteristics include, as adults, the lack of mouthparts, large spacing between the fore- and hindwings, and the arrangement of the female genitalia.

In the first year after birth the great wings and body unite, and the small wings extend inward above the anterior part of the body, and, meeting with each other in the middle line, form an elevated smooth surface, termed the jugum sphenoidale.

Each heredium was divided in half along the north-south axis thus creating two jugera: one jugerum, from jugum (yoke), measured 2523 square metres, which was the amount of land that could be ploughed in one day by a pair of oxen.

In the Trichoptera and some Monotrysian Lepidoptera (Philpott, 1924; 1925), the jugal area is produced into a lobe-like fibula or more elongate jugum which lies on top of the hind wing during flight but may be folded beneath the fore wing at rest.

Chapter 3) states "That portion of land used to be known as a "jugerum," which was capable of being ploughed by a single "jugum," or yoke of oxen, in one day; an "actus" being as much as the oxen could plough at a single spell, fairly estimated, without stopping.