Orientogeochus rheinheimeri Legalov, 2021

Legalov, A. A., 2021, A new genus of the subtribe Geochina (Coleoptera: Curculionidae) from the Philippines, Far Eastern Entomologist 425, pp. 1-6 : 4-5

Orientogeochus rheinheimeri Legalov , sp. n.

http://zoobank.org/NomenclaturalActs/5972311e-7974-4502-b45f-9cb80eef07d9

Figs 1–4

TYPE MATERIAL. Holotype – ♀, the Philippines: Luzon , Sierra Madre Mtr.,

Quirino Prov., XI 2015, local collector ( ISEA) .

DESCRIPTION. FEMALE. Body length (without rostrum) 1.7 mm. Rostrum length 0.5 mm. Body black, glabrous. Antennae and tarsi red-brown. Rostrum long,

curved, widened to apex, 1.8 times as long as wide at apex, 2.5 times as long as wide in middle and 3.0 times as long as wide at base, 0.8 times as long as pronotum,

flattened at apex, finely and densely punctuate, with sparse and large punctation.

Back of rostrum without carina. Mandibles large, almost straight at outer edge.

Eyes large, rounded, coarsely faceted, protruding from contour of head. Forehead flat, quite narrow, 0.4 times as long as rostrum base width. Antennal scrobes dorsally,

visible dorso-laterally at apex. Antennae long, inserted at apical third of rostrum,

dorso-laterally. Antennomere 1 long, not reaching eyes, 7.6 times as long as wide at apex. Antennomeres 2 and 3 suboval. Antennomere 2 1.9 times as long as wide, 0.2

times as long as and 0.7 times as narrow as antennomere 1. Antennomere 3 2.9

times as long as wide, 0.8 times as long as and 0.5 times as narrow as antennomere

2. Antennomeres 4-6 short-oval. Antennomere 4 2.0 times as long as wide, 0.9

times as long as and 1.3 times as narrow as antennomere 3. Antennomere 5 1.7

times as long as wide, slightly shorter and wider than antennomere 4. Antennomere

6 1.9 times as long as wide, 1.1 times as long as and equal in wide to antennomere

5. Antennomere 7 1.9 times as long as wide, 1.2 times as long as and 1.2 times as narrow as antennomere 6. Antennal club compact, 2.1 times as long as wide in middle, 0.5 times as long as flagellum, tomentose. Pronotum bell-shaped, 1.3 times as long as wide at apex, 0.9 times as long as wide in middle, 0.7 times as long as wide at base. Anterior collar present. Disk convex, densely punctate. Distances between punctation subequal to diameter of them, shiny. Scutellum absent. Elytra

1.4 times as long as wide at base, 1.2 times as long as wide in middle, 2.4 times as long as wide at apex, 2.2 times as long as pronotum, narrowed to apical fourth.

Humeri smooth. Elytral striae distinct, with large punctation. Interstriae narrower than wide of elytral striae. Prosternum without postocular lobes. Pre- and postcoxal portions of prosternum short. Precoxal portion about 0.2 times as long as length of procoxal cavity. Postcoxal portion 2.0 times as long as precoxal portion. Procoxal cavities distinctly separated. Mesocoxal cavities widely separated. Metaventrite flat,

densely punctate, 0.5 times as long as length of metacoxal cavity. Abdomen flattened, finely puncate. Ventrites 1 and 2 long. Ventrite 1 0.8 times as long as length of metacoxal cavity. Ventrite 2 1.6 times as long as ventrite 1. Ventrites 3

and 4 short. Ventrite 3 0.3 times as long as ventrite 2. Ventrite 4 1.1 times as long as ventrite 3. Ventrite 5 2.5 times as long as ventrite 4, without anal setae. Procoxae large, subconical. Meso- and metacoxae subspherical. Femora and tibiae densely punctate. Femora thickened, with large teeth on middle. Tibiae curved at basal fourth, without uncus and mucro. Tarsi quite wide. Tarsomere 1 conical. Tarsomere

2 wide-conical, wider and shorter than tarsomere 1. Tarsomere 3 wide-bilobed, with pulvilli on lower surface. Tarsomere 5 elongate. Tarsal claws free, strongly divergent, without teeth.

DISTRIBUTION. The Philippines: Luzon ( Fig. 5 ).

ETYMOLOGY. The species is named in honor of Joachim Rheinheimer (Lud-

wigshafen), who studied this group.

circle – Geochus spp. , square – Afrogeochus franzi .

Figures

Figs 1–4. Orientogeochus rheinheimeri sp. n., holotype female, habitus. 1 – dorsal view;

Fig. 5. Distribution of the subtribe Geochina: octagon – Orientogeochus rheinheimeri,