Megacraspedus calamogonus is a moth of the Gelechiidae family. It was described by Meyrick in 1886. It is found in New Zealand. The wingspan is 10-16 mm. The forewings are whitish-ochreous, with the veins sometimes slightly infuscated. There is a dark fuscous dot in the disc slightly before the middle, a second very obliquely before it on the fold, and a third in the disc at two-thirds. There is also a short fuscous apical streak. The hindwings are whitish.