More derived families, such as Calliphoridae ( blow flies ), have developed specialized structures called " calyptrae " or " squama ", which are tiny flaps of wing, that cover the haltere.
12.
Corneocytes, also referred to as squames ( from Latin " squama ", meaning a thin flake or scales ) are terminally differentiated, anucleated cells of keratinocyte lineage that constitute the majority of stratum corneum, the outermost layer of the epidermis.
13.
These furrows begin near the foramen spinosum, and the anterior runs forward and upward to the sphenoidal angle of the parietal, where it is sometimes converted into a bony canal; the posterior runs lateralward and backward across the temporal squama and passes on to the parietal near the middle of its lower border.
14.
The tympanic antrum is bounded above by a thin plate of bone, the tegmen tympani, which separates it from the middle fossa of the base of the skull; below by the mastoid process; laterally by the squama just below the temporal line, and medially by the lateral semicircular canal of the internal ear which projects into its cavity.
15.
The outer squama ( c ) arises from the wing base behind the third axillary sclerite ( 3Ax ) and evidently represents the jugal lobe of other insects ( A, D ); the larger inner squama ( d ) arises from the posterior scutellar margin of the tergum of the wing-bearing segment and forms a protective, hoodlike canopy over the halter.
16.
The outer squama ( c ) arises from the wing base behind the third axillary sclerite ( 3Ax ) and evidently represents the jugal lobe of other insects ( A, D ); the larger inner squama ( d ) arises from the posterior scutellar margin of the tergum of the wing-bearing segment and forms a protective, hoodlike canopy over the halter.
17.
The outer squama ( c ) arises from the wing base behind the third axillary sclerite ( 3Ax ) and evidently represents the jugal lobe of other insects ( A, D ); the larger inner squama ( d ) arises from the posterior scutellar margin of the tergum of the wing-bearing segment and forms a protective, hood-like canopy over the halter.
18.
The outer squama ( c ) arises from the wing base behind the third axillary sclerite ( 3Ax ) and evidently represents the jugal lobe of other insects ( A, D ); the larger inner squama ( d ) arises from the posterior scutellar margin of the tergum of the wing-bearing segment and forms a protective, hood-like canopy over the halter.
