Gnathothlibus samoaensis is a moth

Moth

A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 of the Sphingidae

Sphingidae

Sphingidae is a family of moths , commonly known as hawk moths, sphinx moths and hornworms, that includes about 1,200 species . It is best represented in the tropics but there are species in every region . They are moderate to large in size and are distinguished among moths for their rapid,...

 family. It is known from Samoa

Samoa

Samoa , officially the Independent State of Samoa, formerly known as Western Samoa is a country encompassing the western part of the Samoan Islands in the South Pacific Ocean. It became independent from New Zealand in 1962. The two main islands of Samoa are Upolu and one of the biggest islands in...

.

The length of the forewings is 35.4-44.3 mm for males and 43.6-44.7 for females. It is similar to Gnathothlibus fijiensis

Gnathothlibus fijiensis

Gnathothlibus fijiensis is a moth of the Sphingidae family. It is known from Fiji.The length of the forewings is 38-41 mm for males and 40-44 for females...

but the outer edge of the tegula is creamy white.

Etymology

The specific name samoaensis is derived from the Pacific Island nation of Samoa, formally Western Samoa, the only recorded locality for the species.