08 mm), the posterior pair is anteriad
of anterior fr-orb.
Pronotum: Much wider than long, strongly declivous anteriorly; anterior collar distinctly developed, delimited posteriorly by a deep transverse furrow, lateral portions thickened; lateral margin narrowly explanate, not projecting anteriad and ventrad, but distinctly elevated dorsad around its middle, distinctly emarginated anteriad of humeri in dorsal view; humeral angle rounded, obtuse, distinct; posterolateral angle very broadly rounded, obsolete (Figs.
Head ochraceous, mandibular plate broadly margined with brown laterally along entire length and medially at its apical portion; clypeus dark brown; base of head blackish brown, outline of blackish area projecting anteriad before ocellus.
7 times as broad as interocular distance, anteocular part broad, lateral margins gradually converging from immediately anteriad to eyes (Fig.
7), the strongly dilated mandibular plates broadly overlapping anteriad of apex of clypeus at least in male (the female of H.
Penis: Glans bent dorsad to shaft, stylus slightly anteriad from vertical.
Penis: Glans bent dorsad to shaft, stylus directed anteriad from vertical.
Additionally, in the Recent sample available (in both ROM Mammalogy and Palaeobiology), the anteriad
curvature of the anterior enamel portion of each buccal bay suggests Lemmus, as this enamel portion is straighter in both Synaptomys species.
1A) has six dorsal stripes with colors grading from cream anteriad
to tan posteriad, a partial tan vertebral (seventh) stripe extending from the occipital region to one-sixth the length of the trunk, cream-beige spots in the upper lateral and dorsolateral fields, bluish-brown dorsal surfaces of the hind limbs and tail, bluish-gray ventral surfaces of the throat, abdomen and distal one-half of the tail, 88 granules around midbody, 209 granules from occiput to rump, five granules separating the paravertebral stripes, 5.
TEXTURE: Impunctate, polished, callosite region of pronotum and corium anteriad
to orangish brown marking, shagreened.