Lagrivea is known from three mandibles (lower jaws)—one, the
holotype, with the fourth premolar (p4) and all three molars (m1–3) preserved; one with the incisor and m2; and one with the incisor, p4, m1, and m2—an isolated lower incisor, and an isolated m2. It was large for a squirrel, The basins are deeper than in
Palaeosciurus and
Ratufa obtusidens and lack crenulations in the enamel, which distinguishes them from another fossil squirrel,
Albanensia. The two cusps at the front, the
protoconid and
metaconid, are isolated from each other. In front of the metaconid, there is a small cuspule, an
anteroconid, at the lingual side of the tooth (the side of the tongue). The central basin of the tooth is relatively deep. At the back of the tooth, the
entoconid cusp is connected to the
posterolophid, a crest that forms the back margin. Of the two roots, the one at the front is round and the one at the back is broad. Although m1 is nearly rectangular, the width at the front is still smaller than the width at the back. There is a strong anteroconid. A crest, the
metalophid, reaches from the protoconid nearly to the metaconid. A small cusp, the
mesostylid, is connected to the metaconid in front of it, unlike in
Miopetaurista and
Aliveria. There are two broad roots. The next tooth, m2, is similar to m1 in most respects, but the width at the front is virtually equal to the width at the back, so that the tooth is about rectangular. The back of m3 is rounded, but the tooth is still nearly rectangular. There is a long anteroconid, which is mainly connected to the metaconid. There is no metalophid. This tooth has three roots: two at the front and a larger one at the back. ==Range and context==