Typomys planifrons ( Miller, 1900 )

Denys, Christiane, Missoup, Alain Didier, Nicolas, Violaine, Sylla, Morlaye, Douno, Mory, Kadjo, Blaise, Lalis, Aude & Monadjem, Ara, 2025, Annotated checklist of rodents from a biodiversity hotspot, Mount Nimba (West Africa), Zoosystema 47 (27), pp. 617-689 : 636

Typomys planifrons ( Miller, 1900)

Arvicanthis planifrons Miller, 1900: 641 .

Hybomys trivirgatus planifrons – Rosevear 1969: 381.

Hybomys planifrons – Carleton & Robbins 1985: 956.

REMARKS

External characters: no standard external measurements exist for the old specimens of T. planifrons but they display the characteristic single-striped pattern of this species. These specimens display only one dorsal black line, and no clear demarcation between dorsal and ventral pelage (yellow-grey). They have a short tail with hairs and an ochraceous spot around the anal region and inner side of hind legs, as indicated by Miller (1900). The skull is robust with a large CIO and a round braincase. The infraorbital foramen enters between the molar rows until the t1 of the upper M1. The tympanic bullae are relatively small. Skull dimensions of the specimens attributed to T. planifrons from Mount Nimba agree well with those of the holotype. There were no size differences with T. trivirgatus in our small sample ( Tables 7 ; 8 ).