Similar species
Characteristics & Similar species
All species in the Craspedochaeta transversa species group, of which C. weemsi is the only North American member, have five pairs of fronto-orbital bristles on the frons, not four, as in the rest of the genus. Craspedochaeta weemsi is also uniquely pale, even for a member of this lightly-patterned group, and is easily distinguished from the other North American Craspedochaeta based on colour alone.

The male terminalia of Craspecochaeta weemsi are also quite different from those of the other two Craspedochaeta found in North America: the cerci are fused along their entire length, greatly enlarged and ovate; the surstylus is highly-reduced and claw-like; and the distiphallus is almost entirely absent, not large and sac-like. The intromittent function of the reduced phallus seems to have been taken over by the extremely elongate basiphallus, which is normally a small structure that acts as a hinge.                   

Distribution
Craspedochaeta weemsi is known from Jamaica, Mexico, Peru and Everglades National Park in Florida. Other members of the C. transversa group are found in Central and South America