In the described male and female, the rear edge of the abdomen is straight.
The abdomen is mottled dark brown and whitish, with a large white patch at the front. The legs are light brown with darker rings.
Madagascarchaea moramora is a tiny spider with an elongated, neck-like front body and long jaws. Its anterior median eyes sit on a bulge, and a small downward-pointing spine occurs near the base of each jaw. Short spines also line the top of the head.
The male and female type specimens were collected in Mikira Forest, Madagascar, on 10–12 December 2008. The 2018 description reports total lengths of 1.53 millimetres for the male and 1.98 for the female. These were the two specimens confidently assigned to the species; some females from other places remained unresolved.
The authors also considered one female from Marojejy and three from Masoala. They could not decide whether these belonged to this species or the similar Madagascarchaea ambre. Fine details of male morphology help distinguish the species, but assigning specimens represented only by females remained problematic. The study described the two confirmed specimens in detail while preserving collection information for the four unresolved females.
An extinction-risk assessment has not been added yet.
Mikira Forest in northeastern Madagascar is the confirmed locality reported in the 2018 description. Maintaining its forest habitat and examining additional specimens to clarify distribution would improve the information available for conservation decisions.