Synommatoides scutellatus He, Zhang and Pelsue

He, Tongli, Zhang, Runzhi & Frank W. Pelsue, Jr., 2003, A New Species Of The Genus Synommatoides Morimoto From China (Coleoptera: Curculionidae: Dryophthorinae), The Coleopterists Bulletin 57 (2), pp. 123-126 : 123-125

Synommatoides scutellatus He, Zhang and Pelsue , new species

Holotype. China. Longquan: Female [Mt. Fengyangshan, 1,700 m, Longquan county, Zhejiang Province, China, 11-VI-1980, leg. X. Tong.] ( IZAS)

Paratype (1). China. Longquan: Male [Mt. Fengyangshan/ 1,700 m / Longquan County / Zhejiang Province / China / 11-VI-1980 /leg. X. Tong] ( IZAS) .

Diagnosis. Derm dull black, punctures filled with yellowish brown vestiture, antennae and tarsi reddish brown. Antennae compact with 5-segmented funicle. Pronotum with anterior margin punctate. Scutellum present, tiny.

Description. Male: Length (excluding head and rostrum): 3.4 mm, width: 1.65 mm. Rostrum slightly shorter than in female, 33 as long as broad, more coarsely punctate. Antennae inserted at 1/3 from base of rostrum, scape clavate, 33 as long as broad; funicle with 5 segments, 0.853 length of scape, segment 1 ovate, 1.33 as long as broad, segment 2 conical, 0.833 as long as broad, segments 3–5 transverse; club ovate, 0.93 length of funicle, 1.53 as long as broad, apex obliquely truncated, tomentose. Apical margin of pronotum arcuately convex, punctate, with 2 indistinct tomentose tubercles, basal margin truncated, disc with large punctures, reticulated. Scutellum (Fig. 5) tiny, shiny. Elytra 1.33 as long as broad, 23 length of pronotum, 1.63 breath of pronotum. Genitalia. Aedeagus (Fig. 7) X-shaped, median lobe with two branches, each with an acute angle at the base, apodemes 23 longer than median lobe in basal 1/6 fused as apodemal bridge; tegmen (Fig. 8) with long apodeme, apically with lateral process, Y-shaped.

Female: Length (excluding head and rostrum): 3.9 mm. width: 1.8 mm. Head (Fig. 1) subglobular, with sparse, fine punctures; frons with transverse sulcus between eyes. Rostrum (Fig. 1) arcuate, cylindrical, parallel-sided in dorsal view, 3.53 as long as broad, 0.953 length of pronotum, basal 6/7 with dense, ovate punctures, apical 1/7 shiny, not punctate; scrobes straight, extending from basal 3/8 to base of rostrum. Antennae (Fig. 2) geniculate, inserted at 1/3 from base of rostrum; scape clavate, 3.63 as long as broad; funicle 5-segmented, 0.83 length of scape, segment 1 ovate, 1.33 as long as broad, segment 2 conical, 0.93 as long as broad, segments 3–5 transverse; club ovate, 1.43 as long as broad, 0.833 length of funicle, apex obliquely truncate, tomentose. Eyes lateral, ovate, and convex. Prothorax (Fig. 3) subcylindrical, 1.053 as long as broad, basal 3/5 parallel-sided, apical 2/5 converging arcuately, with strong constriction at apical 1/4; apical margin and basal margin subtruncate; disc with large, round punctures, apical margin with small, shallow, round punctures and 2 tomentose tubercles. Scutellum (Fig. 4) tiny, scutellate, shiny. Elytra oblong-ovate, 1.453 as long as broad, 23 length of pronotum, 1.443 width of pronotum; basal margin concaved arcuately, humeri obsolete, lateral margins convex arcuately, broadest at 1/3 from base; striae broad, with dense, large, ovate punctures becoming smaller apically; intervals much narrower than striae, intervals 1, 3, 5, 7, 9 strongly carinate, with sparse yellowish brown vestisure, other intervals flat and glabrous, intervals 3 and 9, 5 and 7 connate behind respectively. Mesosternum with dense, large, round punctures at middle, both sides smooth and glabrous. Mesepisternum triangular, with large, round punctures anteriorly, smooth and glabrous posteriorly. Mesepimeron irregular quadrilateral, smooth and glabrous, lower edge with large, round punctures posteriorly. Metasternum convex at middle, with sparse, small, round punctures, both sides with dense, large, round punctures, slightly depressed at middle of posterior margin. Legs short, stout; Procoxae contiguous, mesocoxae narrowly separated, metacoxae widely separated; femora clavate, compressed, with large, dense, ovate punctures; tibiae subrectate, sulcate and carinate laterally, apex with inner flange and arcuate uncus; tarsi linear, abbreviated, segments 1–3 tomentose beneath, segment 3 simple, not bilobed, segment 5 shorter than segments 1–3, with 2 claws at apex, claws separated, small, curved. Abdomen with sternites 1–2 connate, convex at middle, other sternites separated; sternites 1, 2, 5 with large, dense, round punctures, sternites 3–4 glabrous, not punctate; sternite 2 longer than sternites 3–4, sternite 5 longer than sternites 3–4. Genitalia. Sternum VIII (Fig. 6) with apodeme 1.93 longer than plate, plate apically with 2 lobes, each bares 3 setae.

Etymological Note. The specific name is derived from the presence of scutellum, which serves as the specific character.

Remarks. This new species and S. shirozui Morimoto share the following characters: Rostrum separated from head by a shallow transverse depression between eyes; antennae with 5-segmented funicle and club obliquely truncated; eyes lateral, ovate; elytra with reduced humeri. The new species differs from S. shirozui in the following characters: Scutellum present and tiny; apical margin of pronotum punctate with 2 tomentose tubercles; antennae stout and more compact.