Table 2 in Taxonomy, phylogeny, and diversity of the extinct Lesser Antillean rice rats (Sigmodontinae: Oryzomyini), with description of a new genus and species

<p><b>Table 2.</b> Condition of morphological characters for West Indian rice rat taxa</p><table><tbody><tr><th>Character trait</th><th><i>Pennatomys</i></th><th><i>Megalomys</i></th><th><i>Oligoryzomys</i></th></tr></tbody><tbody><tr><th>Size</th><td>Medium</td><td>Large</td><td>Small</td></tr><tr><th>Pedal plantar pads</th><td>Unknown</td><td>Hypothenar absent or vestigial, digitals large</td><td>Hypothenar present, digitals small</td></tr><tr><th>Nasals posterior extension</th><td>Even with maxillary&ndash;frontal&ndash; lacrimal suture</td><td>Posterior to maxillary&ndash;frontal&ndash; lacrimal suture</td><td>Even with maxillary&ndash;frontal&ndash; lacrimal suture</td></tr><tr><th>Lacrimal articulation</th><td>Equal maxillary and frontal</td><td>Primarily with maxillary</td><td>Equal maxillary and frontal</td></tr><tr><th>Supraorbital shape</th><td>Slightly convergent anteriorly with weak crest</td><td>Convergent anteriorly with well-developed crest</td><td>Squared, smooth margins</td></tr><tr><th>Posterior margin of zygomatic plate</th><td>Slightly anterior to M1 alveolus</td><td>Approximately even with M1 alveolus</td><td>Anterior to M1 alveolus</td></tr><tr><th>Carotid circulation pattern</th><td>Unknown</td><td>III*</td><td>II*</td></tr><tr><th>Anterior section of masseteric crests in ramus</th><td>Joined</td><td>Separated</td><td>Separated</td></tr><tr><th>Labial accessory root on M1</th><td>Absent</td><td>Present</td><td>Unknown&dagger;</td></tr><tr><th>Roots on m2</th><td>3</td><td>3</td><td>Unknown&dagger;</td></tr><tr><th>Roots on m3</th><td>2</td><td>3</td><td>Unknown&dagger;</td></tr><tr><th>Anteromedian flexus on M1</th><td>Absent</td><td>Present, shallow</td><td>Present, deep</td></tr><tr><th>Mesofossette on M2</th><td>Single</td><td>Single</td><td>Double</td></tr><tr><th>Posteroloph on M3</th><td>Absent</td><td>Present</td><td>Present</td></tr><tr><th>Anterolophid on m2 and m3</th><td>Present</td><td>Present</td><td>Absent</td></tr></tbody></table><p><i>Megalomys</i> characters are based on <i>Megalomys luciae</i> and <i>Megalomys desmarestii</i> only.</p><p>*Pattern II, stapedial foramen present, sphenofrontal foramen absent; pattern III, stapedial foramen and sphenofrontal foramen absent.</p><p>&dagger;Other species of <i>Oligoryzomys</i> do not have a labial accessory root on M1, and have only two roots on m2 and m3.</p>