See text Sethosiella Kryger, 1932 Paramegaphragma Lin, 1992 Megaphragma is a genus of wasp in the family Trichogrammatidae.

The head capsule has only 1 barely noticeable post-occipital ridge, and several folds near the base of the antennae, and other sutures are absent.

The occipital area has many folds that reduce the skull's size from pupae to adults.

[3] The antennae are inserted at mid-level of the orbital line and are approximately 150 μm long.

The subcylindrical pedicel, small anellus and a single cylindrical funicular segment may be present or absent.

The maxillae consist of a small, triangular cardo, broad fusiform stipes, largely fused endite lobes, and palp.

The labium consists of an almost triangular prementum, which has single-segmented, vestigial palps on the lateral margin, and membranous ligula on the apex.

The anterior part of the propectus bears paired cervical processes, which the head articulates to.

The posterior margin of mesonotum forms the mesophargma, which is very long and almost reaches the tip of the metasoma.

[3] The metathorax consists of only a narrow and circular metanotum, since the other sclerites are fused with the first abdominal segment, forming the propodeum.

The pleural apodeme is well-developed and is shaped like a longitudinal ridge with its top flattened.

[3] The forewing is very narrow compared to the other Trichogrammatidae, and is 5.3 to 10 times as long as the maximum discal width.

The veins are usually fused into an arch at the anterior wing margin, which is formed from the fusion of the subcosta and radius.

[2][3] The legs are slender and ambulatorial, and consist of a coxa, two-segmented trochanter, femur, tibia and three-segmented tarsi.

Due to advancements in volumetric electron microscopy, there are now multiple connectomes of the brain including one of the entire head.

This neural denucleation is thought to be an evolutionary adaptation to the size constraints of the organism.

The cuticle is 0.7 to 2.4 μm thick in M. Mymaripenne, with the thinnest integument being in the area between sclerites, and the thickest on the notal part of the mesosoma, and the posterior side of the head.