Left frontal recess of an adult Dasyprocta cristata, seen from the medial side after the ethmoturbinal complex and the semicircular lamina are entirely removed. The dorsal root of the semicircular lamina (sl) is indicated, as is the ventral connection of the horizontal lamina (hl). Three of the frontoturbinals (ft) are visible adjacent to the lateral part of the cribriform plate (cp). alr, anterolateral recess. Scale bar: 2.5 mm.