Dryophthorus luzonensis Legalov, 2022

Legalov, Andrei A., 2022, New species of the genera Dryophthorus Germar, 1823 and Stenommatus Wollaston, 1873 (Coleoptera: Curculionidae) from Philippines and New Guinea, Ecologica Montenegrina 55, pp. 69-74 : 70-72

Genus: Dryophthorus Germar, 1823

Species: Dryophthorus luzonensis Legalov , sp. nov. ( Fig. 1A ) https://zoobank.org/ urn:lsid:zoobank.org:act:3CFCE6D0-69DA-481E-B277-0660D7A98E82

Type material: Holotype, female ( ISEA), PHILIPPINES, North Luzon, Kalinga Prov., Lubuangan , VI.2018, local collector . Paratype, female ( ISEA), idem ; 2 females ( ISEA), North Luzon, Ifugao Prov., Hungduan , I.2018, local collector ; 2 females ( ISEA), idem , II.2018, local collector; female ( ISEA), North Luzon, Mountain Prov., Barlig , VI.2014, local collector ; 2 females ( ISEA), idem , IX.2015, local collector.

Description. Female: Body black, with matted semierect pubescence. Antennae, apex of tibiae and tarsi red-brown. Head subconical. Mandibles small. Rostrum quite short, 0.7-0.8 times as long as pronotum, 2.2-2.9 times as long as wide at apex, 2.2-2.9 times as long as wide at midlength, 2.2-2.6 times as long as wide at base, weakly curved, densely punctate. Apex of rostrum subglabrous. Eyes large, linear, not protruding from contour of head, separated ventrally, coarsely faceted. Forehead flat, 0.8-0.9 times as narrow as rostrum base width, finely punctate. Temples longer than eye length. Antennal scrobes directed to base of rostrum. Antennae inserted before middle of rostrum. Scape long, about 3.8 times as long as wide in apex, extends beyond back of eye. Funicle 4-segmented. Antennomere 2 suboval, about 1.7 times as long as wide in apex, about 0.3 times as long as and about 0.7 times as narrow as scape. Antennomere 3 conical, equal in length and width in apex, 0.6 times as long as and equal in wide to antennomere 2. Antennomeres 4 and 5 wide-conical. Antennomere 4 about 0.5 times as long as wide in apex, about 0.7 times as long as and slightly wider than antennomere 3. Antennomere 5 two times as long as wide, slightly shorter and wider than antennomere 4. Antennal club compact, not truncate, about 1.4 times as long as wide, 0.8 times as long as antennomeres 2-5 combined, with tomentose apex. Pronotum campanulate, 1.4-1.5 times as long as wide at apex, slightly longer than wide at midlength and 1.1 times as long as wide at pronotal base, with sharp pronotal constriction. Pronotal disc weakly convex dorsally, coarsely punctate. Intervals between points smaller than their diameter. Maximum width before middle. Base of pronotum distinctly narrower than base of elytra. Scutellum small, triangular. Elytra narrowed from humeri to apex, at base 1.8-1.9 times as long as wide, at midlength 1.8-1.9 times as long as wide, at apical fourth 2.6-2.9 times as long as wide, 2.0-2.1 times as long as pronotum. Humeri weakly flattened. Elytral striae distinct, slightly wider than elytral interstriae. Stria 9 short, fused with stria 10 at level of metacoxae. Interstriae convex, narrow. Prosternum punctate, without postocular lobes. Precoxal portion of prosternum about 1.3 times as long as procoxal cavity length. Postcoxal portion of prosternum short, about 0.4 times as long as procoxal cavity. Procoxal cavities quite narrowly separated. Metepistrnum concealed by elytra. Metaventrite about two times as long as length of metacoxa, flattened, coarsely punctate. Abdomen coarsely punctate. Ventrites 1 and 2 weakly convex. Ventrite 1 about 0.8 times as long as length of metacoxa. Ventrite 2 about 1.3 times as long as ventrite 1. Ventrites 3 and 4 subequal in length, flattened. Ventrite 3 about 0.3 times as long as ventrite 2. Ventrite 5 about 3.7 times as long as ventrite 4, densely punctate. Procoxae spherical. Metacoxae almost transverse. Femora slightly thickened, without tooth. Metafemora not extending beyond apex of abdomen. Tibiae weakly curved, with large uncus. Tarsi long. Tarsomeres 1-3 subconical. Tarsomere 4 square. Tarsomere 5 elongate. Tarsal claws free, divergent. Total body length (without rostrum) 3.1-4.1 mm. Length of rostrum 0.7-0.9 mm.

Differential diagnosis. The new species differs from Dryophthorus subtruncatus Voss, 1940 from the Philippines in the elytra narrowed from the humeri to an apex and with sharp pronotal constriction.

Etymology. From Luzon Isl.

Localisation. North Luzon: Kalinga, Ifugao and Mountain Prov .

Species: Dryophthorus orientalis Legalov , sp. nov. ( Figs. 1B, 1D ) https://zoobank.org/ urn:lsid:zoobank.org:act:FBD87736-71A9-48CC-9976-5C801822CD72

Type material: Holotype, female ( ISEA), PHILIPPINES, North Luzon , Benguet Prov., Tublay, XI, 2017, local collector . Paratype, female ( ISEA), North Luzon, Ifugao Prov., Hungduan , I.2018, local collector; female ( ISEA), idem, II.2018, local collector .

Description. Female: Body black, with matted semierect pubescence. Antennae, apex of tibiae and tarsi brownish. Head subconical, punctate. Rostrum 0.8 times as long as pronotum, 2.4-2.6 times as long as wide at apex, 2.7-3.1 times as long as wide at midlength, 3.1-3.3 times as long as wide at base, weakly curved, densely punctuate by small points, with subglabrous apex. Eyes large, linear, not protruding from contour of head, separated ventrally, coarsely faceted. Forehead flat, about 0.8 times as narrow as rostrum base width, densely punctate. Temples longer than eye length. Antennal scrobes directed to base of rostrum. Antennae inserted before middle of rostrum, with 4-segmented funicle. Scape long, about 5.7 times as long as wide in apex, extends beyond back of eye. Antennomere 2 suboval, about 1.6 times as long as wide in apex, about 0.3 times as long as and slightly narrower than scape. Antennomere 3 conical, about 1.3 times as long as wide in apex, about 0.7 times as long as and about 0.8 times as long as antennomere 2. Antennomeres 4 and 5 wide-conical. Antennomere 4 about 0.7 times as long as wide in apex, about 0.7 times as long as and about 1.2 times as wide as antennomere 3. Antennomere 5 about 0.6 times as long as wide, shorter and wider than antennomere 4. Antennal club compact, not truncate, about 1.9 times as long as wide, slightly shorter than antennomeres 2-5 combined, with tomentose apex. Pronotum campanulate, 1.4 times as long as wide at apex, slightly longer than wide at midlength and 1.2 times as long as wide at pronotal base, with sharp pronotal constriction. Pronotal disc flattened, coarsely punctate. Intervals between points much smaller than their diameter. Maximum width before middle. Scutellum small, triangular. Elytra suboval, at base 1.6-1.8 times as long as wide, at midlength 1.3-1.5 times as long as wide, at apical fourth 3.2-3.9 times as long as wide, 1.6-1.8 times as long as pronotum. Humeri absent. Elytral striae distinct, with large rounded points. Interstriae convex, partially carinate, 0.7-1.2 times as wide as stria width. Interstria 3 connected apically with interstria 9. Prosternum punctate, without postocular lobes. Precoxal portion of prosternum about 1.5 times as long as procoxal cavity length. Postcoxal portion of prosternum about 0.6 times as long as procoxal cavity. Procoxal cavities quite narrowly separated. Metepistrnum concealed by elytra. Metaventrite about 1.7 times as long as length of metacoxa, flattened, rarely punctate. Ventrites 1 and 2 weakly convex, coarsely punctate. Ventrite 1 about 0.9 times as long as length of metacoxa. Ventrite 2 slightly longer than ventrite 1. Ventrites 3 and 4 flattened, finely punctate. Ventrite 3 about 0.4 times as long as ventrite 2. Ventrite 4 slightly shorter than ventrite 3. Ventrite 5 about 4.2 times as long as ventrite 4, densely punctate. Procoxae spherical. Metacoxae almost transverse. Femora slightly thickened, without tooth. Tibiae weakly curved, with large uncus. Tarsi long. Tarsomeres 1-3 subconical. Tarsomere 4 square. Tarsomere 5 elongate. Tarsal claws free, divergent. Total body length (without rostrum) 2.9-3.1 mm. Length of rostrum 0.8 mm.

Differential diagnosis. The new species differs from Dryophthorus subtruncatus and D. luzonensis Legalov , sp. nov. in the elytral interstria 3 connected apically with the interstria 9, and also the elytra lacking humeri.

Etymology. From Oriental Region.

Localisation. North Luzon : Benguet and Ifugao Prov.

Figures

Figure 1. Dryophthorini spp., body, holotypes, females: A – Dryophthorus luzonensis sp. nov., dorsal view; B – D. orientalis sp. nov., dorsal view; C – Stenommatus telnovi sp. nov., dorsal view; D – Dryophthorus orientalis sp. nov., lateral view; E – Stenommatus telnovi sp. nov., lateral view. Scale bar 1.0 mm.