. Bulletin of the Natural History Museum Zoology. A NEW SPECIES OF HYLOMYS CORF SPALF. OPTF FOV SOPF Fig. 3 Lateral view of left orbital region of Hylomys megalotis BMNH Scale = 1 mm. Abbreviations: AL - alisphenoid. AL1C - alisphenoid canal, CORF - cranio-orbital foramen. EF - ethmoid foramen. FOV - foramen ovale, FR - frontal. MX - maxilla. OPTF - optic foramen. OS - orbitosphenoid. PL - palatal. PR - parietal, PT - pterygoid, SOPF - suboptic foramen. SPALF - sphenopalatine foramen. SPORF - sphenorbital foramen, SQ - squamosal. palatine suture and the palatine artery grooves are sma
. Bulletin of the Natural History Museum Zoology. A NEW SPECIES OF HYLOMYS CORF SPALF. OPTF FOV SOPF Fig. 3 Lateral view of left orbital region of Hylomys megalotis BMNH Scale = 1 mm. Abbreviations: AL - alisphenoid. AL1C - alisphenoid canal, CORF - cranio-orbital foramen. EF - ethmoid foramen. FOV - foramen ovale, FR - frontal. MX - maxilla. OPTF - optic foramen. OS - orbitosphenoid. PL - palatal. PR - parietal, PT - pterygoid, SOPF - suboptic foramen. SPALF - sphenopalatine foramen. SPORF - sphenorbital foramen, SQ - squamosal. palatine suture and the palatine artery grooves are small or indis- tinct. The anterior opening of infraorbital canal is dorsal to P3/P4 in most species of Hylomys but dorsal to P4/M1 in H. megalotis, H. parvus and Echinosorex, and yet more posteriorly positioned in Podogymnura. The dentition of H. megalotis is considerably more robust than that of any of the other species of Hylomys. The dental formula is the same as in H. suillits and H. parvus and these species are distin- guished from H. hainanensis, which lacks pi and H. sinensis, which lacks PI and pi. In H. megalotis and H. parvus, P2 has two roots, unlike the other species which have either one or two well fused roots. Unlike all other species which lack a lingual cusp, P3 of H. megalotis has a well developed lingual cusp as in Echinosorex, and this tooth is large with three roots as in Podogymnura and Echinosorex; p3 is larger than p2 with two roots as in H. pan'us, Podogymnura and Echinosorex, while p3 is slightly smaller than p2 with one root in H. suillus, H. sinensis and H. hainanensis. RESULTS OF THE PHYLOGENETIC ANALYSIS Forty equally most parsimonious trees were retained in the branch and bound analysis, 141 steps in length, with a Consistency Index of , Retention Index of and Rescaled Consistency Index of In all most parsimonious trees the two subfamilies, Galericinae and Erinaceinae, readily segregated and the Galericinae further separated into two
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