The narrow, but only slightly shorter forewings are designed as tegmina to and have a light front edge, which gives the animals with closed wings the typical lateral stripes over the mesonotum and half of the abdomen.

The fully developed hind wings are reddish and marked with a brown net pattern.

There it was found on the Malay Peninsula, in Thailand, Singapore, as well as on Sumatra and in Sarawak on Borneo.

In addition, the animals then threaten, similar to the representatives of the closely related genus Haaniella, with raised abdomen and the attacker stretched, splayed hind legs.

[13] The heaviest eggs are 250 to 300 mg laid by the closely related Haaniella echinata.

These are able to change their lighter color during the day to a darker one at night and form sleeping communities up to the fourth larval stage, in which the insects clump or chain to one another on the food plants.

[9][17] In their investigations based on genetic analysis to clarify the phylogeny of the Heteropterygidae, Sarah Bank et al showed that the representatives of the Heteropterigini form a common clade, but the genus Heteropteryx phylogenetically is to be placed in the middle of several lines of species currently listed in Haaniella.

It could also be shown that in addition to the Malay Heteropteryx dilatata there is another species from the Thai Phang Nga Province, more precisely from the Khao Lak–Lam Ru National Park.

A breeding stock imported from Phuket in 1998, in which the females have black coxae, has been lost.

The fact that this corresponds to the one used by Bank et al. the undescribed species identified in 2021 is considered likely, as the two sites are only about one hundred kilometers apart and the specimens examined by molecular genetics also have black coxes.

The feed branches with leaves can be placed in a narrow-necked vase so that they stay fresh longer.

Among other leaves, those of bramble are eaten, such as blackberry and raspberry, but also oak, hazel and ivy.

In order to enable the females to lay their eggs, the ground should be covered several centimeters thick with substrate.