Tmesisternus busuensis, Withaar, 2019

Withaar, Gerrit, 2019, Six new species of the genus Tmesisternus from New Guinea and Seram (Coleoptera: Cerambycidae, Lamiinae, Tmesisternini), Sugapa Digital 11 (2), pp. 69-78 : 71

Tmesisternus busuensis spec. nov.

( Figs 2 , 7 )

urn:lsid:zoobank.org:act:B2F3FECA-33AD-428E-8420-124F343721A8

Holotype: ♂, [ Papua New Guinea] Busu R. 50-70 m. 7.viii.1964 [ BPBM].

Diagnosis: Tmesisternus busuensis resembles very much T. testegaus Withaar, 2016 , but is much smaller than the latter and has yellow spots on the front and has a more complicated structure of the genitalia.

Description: Length: 12 mm, width: 4 mm. Female unknown.

Head pitchy and shiny, with red eyes. Dorsally entirely covered with very fine grey pubescens, except for a double ridged groove from base to labrum and lateral ridges. Labrum with long stiff grey hairs. Ventrally with long contiguous grey pubescens. On front and vertex four dots of long contiguous grey pubescens. Two yellow pubescent spots on front between the eyes and the lateral ridges.

Antenna chestnut coloured, eleven segmented and just exceeding the elytra apex. First antennal segment claviate.

Pronotum pitchy, a somewhat wider than long, narrowing to the apex. Lateral ridges with a blunt tubercle just in front of the apex. Dorsally with scattered punctures, except for a central area. Entirely covered with transparent, transverse grey pubescens. Ventro-laterally with a large blunt tubercle in a grey pubescent area with dark spots.

Scutellum chestnut coloured with laterally scarce grey pubescens.

Elytra a little wider than the base of the pronotum, with pronounced round shoulders, gradually narrowing to the laterally strong spined apex. Pitchy with a few chestnut coloured areas. A large postscutellar smooth chestnut coloured area, except for a sutural ridge and three longitudinal ridges on the elytra. Between the ridges entirely covered with grey pubescens and some longitudinal white pubescent spots. On the epipleura four large white pubescent spots. On basal half some punctures, except for the post scutellar area.

Legs with femora pedunculate and with the tibia olive coloured. Tarsi red, entirely covered with fine transparent pubescens.

Abdomen ventrally smooth, chestnut coloured with grey pubescens.

Genitalia as in fig. 7.

Distribution: The holotype was found near Busu River, near Lae, Morobe Province, Papua New Guinea

Etymology: The species name busuensis is derived from the Busu River in Papua New Guinea where the holotype was found.

Figures

Figs 1-6. Tmesisternus species, adults. Fig. 1. T. bernsteini spec. nov. holotype ♂, Waigeo Island, Papua Barat, Indonesia (RMNH); Fig. 2. T. busuensis spec. nov. holotype ♂, Busu River, Papua New Guinea (BPBM); Fig. 3. T. deyrollei spec. nov. holotype ♂, Seram Island, Moluccas, Indonesia (RMNH); Fig. 4. T. hunsteinensis spec. nov. holotype ♀, Hunsteinspitze, East Sepik Province, Papua New Guinea (MFNB); Fig. 5. T. pindiuensis spec. nov. holotype ♂, Pindiu, Morobe Province, Papua New Guinea (BPBM); Fig. 6. T. wendesi spec. nov. holotype ♂, Wendesi, Papua Barat, Indonesia (RMNH).

Figs 7-8. Male genitalia of Tmesisternus, a. paramere lateral; b. paramere ventral; c. aedeagus ventral; d. aedeagus lateral. Fig. 7. T. busuensis spec. nov.; Fig. 8. T. deyrollei spec. nov.