Tainosia quisqueyae is in length and has a wing length of . Though similar to the related genus
Tonocatecutlius known from
Mexican amber, there are several notable differences between the genera.
Tonocatecutlius has a
mesonotum which is smooth and uninterrupted, while
Tainosia has a mesonotum that bears anterolateral carinae. The
forewing of
Tainosia has a costal cell and clavus without transverse veinlets, while
Tonocatecutlius has a costal cell and clavus crossed by veinlets. Similar to
Tonocatecutlius is the network of veins crossing the upper half of the tegmen. The tegmen is semi-hyaline with faint but distinct color patterning present, the hindwing is hyaline and without any patterning. ==References==