Camptocerus costatus Chapuis, 1869

Smith, Sarah M. & Cognato, Anthony I., 2010, A taxonomic revision of Camptocerus Dejean (Coleoptera: Curculionidae: Scolytinae), Insecta Mundi 2010 (148), pp. 1-88 : 54-56

Camptocerus costatus Chapuis

(Fig. 35 – 36, 65)

Camptocerus costatus Chapuis 1869: 259 . Holotype: male, BRAZIL: ‘Brazil, Dejean’ (ISNB). Camptocerus seriatus Eggers 1933b: 12 . Holotype: female, FRENCH GUIANA: Les roches de Kourou

(MNHN). Synonymy: Wood 2007: 205.

Diagnosis. The male of this species is distinguished by the elytral declivity strongly impressed below the level of the disk and occupying the apical four-fifths of the elytra, by the carinate costa on interstria eight

originating on the basal fifth and extending around

the apex to the sutural margin, by the deeply im-

pressed striae, and by the bristling brown setae

originating from recumbent interstrial asperities.

The female is distinguished from that of C.

pilifrons by the uniform color, by the larger size,

and by the more deeply impressed striae.

Redescription (male). 3.5-3.9 mm long (mean = 3.7 mm; n = 6); 1.8-2.0 times as long as wide. Color uniformly orange red to black.

Epistoma excavated, expanded to greater than a quarter length of head, apical epistomal margin unarmed; surface shagreened; each lateral margin with a sub-acute arcuate costa angled proximally, lined entirely with setae; basal epistomal margin bearing a short, transverse, rectangular carina (Fig. 2g). Frons strongly excavated, excavation borders the ocular margin; surface shagreened; bearing dense, erect, dark yellow hairlike setae, 2 rows on lateral and dorsal margin twice the length of other setae. Antennal scape elongate and broadly rounded distally, bearing a brush of setae on distal half, those as long as scape; ventral margin of segments 2-7 bearing brushes of setae, these equal to 2 times the length of funicle; segments 1-7 of funicle bearing hair-like setae on dorsal margin, these less than length of 4 segments; anterior face of the club setose, with a partial septum.

Apical pronotal margin broadly rounded (Fig. 5a), area between eyes glabrous; surface smooth, with dense, minute punctures; median line devoid of punctures; apical fourth bearing 5-6 transverse setae; pronotal base recurved (Fig. 8b); carina on lateral margin type D (Fig. 7d).

Scutellum shape type I ( Fig. 12i ).

Elytral sides parallel, narrowing to a smooth Figure 35. Camptocerus costatus , 3.5-3.9 mm, male.

Lateral (A), dorsal (B), declivity (C); female lateral (D). apex; base never tumid from interstriae 7-9. Disk short, occupying basal fifth of elytra; interstriae 1-4 rugose, remaining disk smooth; basal margin of elytra with a weak carina extending to scutellar apex (Fig. 11c). Declivity strongly impressed below level of disk, occupying apical four-fifths of elytra; bearing asperities which progressively become smaller in size from the basal margin to apex, with asperities on basal margin forming crenulations, those transition to small tubercles on apical fifth and are obsolete at the elytral apex; striae moderately impressed; interstriae on basal fifth with recumbent asperities above punctures, each puncture with a short, dark yellow bristle arising from the posterior margin; twice width of striae. Tenth interstriae with a carina shorter than metepisternum. Metepisternum shape type M ( Fig. 9m ); setae palmately divided into 4 or more filaments. Mesosternum shape type B ( Fig. 10b ).

Male genitalia. Median lobe flat, lateral and apical margins with moderate sclerotization; lateral folds thick, uniformly arcuate; apex broadly acute; lateral margins of median lobe folded dorsally, forming a broad point on basal third. Median struts stout, laterally compressed and wider basally, more than a quarter of body length. Internal sac central area membranous, seminal valve moderately sclerotized, forming a narrow horseshoe shape that follows the contours of the apical half of the median lobe; 2 longitudinally rectangular plates each with apices projecting basally toward lateral folds, apical region of

plates with a strongly arcuate ventrally curved

spine ( Fig. 65). Tegmen semi-circular, ventral side

short. Spicule nearly longer then aedeagus, sickle-

shaped.

Female. Similar to male except epistoma flat,

less than a quarter length of head and unarmed; 2

rows of setae on distal margin. Frons flat; surface

shagreened; short, sparse setae present on lateral

margins. Each gena with a circular mycangium

(Fig. 4c). Segments 1-7 of funicle bearing setae on

dorsal margin, these less than length of 3 seg-

ments. Elytra finely sculptured, without indica-

tion either of recumbent asperities or carinate cos-

tae. Disk covered with shallow rugosities to

interstria eight. Declivital interstriae 1-5 on api-

cal half with a crenulation at the base of each punc-

ture, each bearing a short bristle, bristles of equal

length; striae weakly impressed.

Specimens examined. (7M, 7F) Figure 36. Camptocerus costatus male head anterior (A),

Type

Material. Holotype Camptocerus anterior oblique (B); female head anterior (C), anterior

oblique (D). costatus , M (ISNB). Holotype Camptocerus seriatus , F (MNHN).

Other material. BRAZIL: Mato Grosso: Villa Vera , 12 o 46’S 55 o 30’W, x.1970, (M. Alvarenga), 1M ( CASC) . ECUADOR: Napo: Tiputini Biodiversity Station , -0.631944, -76.144167, 220-250 m, vi.1998, ex. canopy fogging (T.L. Erwin et al.), lot 1817, 1M ( USNM) ; Santo Domingo de los Tsáchilas: Santo Domingo D.L.C. [de los Colorados ], v.1982, 1M ( BMNH) ; No specific locality: ‘ Ecuador’, 1F ( BMNH) . GUYANA: [= Region 8]: Iwokrama Forest , 4.671822, -58.684114, 66 m, ex. Ocotea oblonga , 4-9.iii.2007, (Cognato, Hulcr, Smith, Dole, McCall), 2M, 4F ( MSUC) . PERU: Loreto: 1.5 km N Teniente Lopez , 2 o 35’S 76 o 6.92’W, 210-240 m, ex. flight intercept trap #166, 22.vii.1970, (Richard Leschen), 1F ( SMEC) . TRINIDAD: Morne Bleu , 2700 ft, 21.viii.1969, (H. & A. Howden), 1M ( USNM) .

Distribution. Brazil (Mato Grosso, Rio de Janeiro, Rondônia), Ecuador (Napo, Santo Domingo de los Tsáchilas), French Guiana, Guyana, Peru (Loreto), Trinidad.

Figures

Figure 9. Character 35: Metepisternum shape (A) type A (state 0; Scolytus ventralis); (B) type B (state 1; Camptocerus noel); (C) type C (state 2; C. latipilis); (D) type D (state 3; C. opacicollis); (E) type E (state 4; Cnemonyx vestitus); (F) type F (state 5; Camptocerus pilifrons); (G) type G (state 6; C. auricomus); (H) type H (state 7; Cnemonyx errans (Blandford)); (I) type I (state 8; Camptocerus quadridens); (J) type J (state 9; Scolytus propinquus Blandford); (K) type K (state A; Cnemonyx boliviae); (L) type L (state B; C. insignis); (M) type M (state C; Camptocerus costatus); (N) type N (state D; Scolytus excavatus); (O) type O (state E; S. schevyrewi); (P) type P (state F; Scolytopsis peruanus); (Q) type Q (state G; Camptocerus unicornus); (R) type R (state H; C. doleae).

Figure 10. Character 36: Mesosternum shape (A) type A (state 0; Camptocerus aeneipennis); (B) type B (state 1; C. costatus); (C) type C (state 2; C. rectus); (D) type D (state 3; C. mallopterus); (E) type E (state 4; C. latipilis); (F) type F (state 5; Cnemonyx vestitus); (G) type G (state 6; C. boliviae); (H) type H (state 7; Scolytopsis peruanus); (I) type I (state 8; Scolytus propinquus); (J) type J (state 9; S. ventralis LeConte; (K) type K (state A; S. multistriatus (Marsham)); (L) type L (state B; Cnemonyx errans); (M) type M (state C; Scolytus schevyrewi); (N) type N (state D; S. excavatus); (O) type O (state E; Camptocerus zucca); (P) type P (state F; C. unicornus).

Figure 12. Character 38: Scutellum shape (A) type A (state 0; Camptocerus aeneipennis); (B) type B (state 1; C. latipilis); (C) type C (state 2; C. rectus); (D) type D (state 3; C. doleae); (E) type E (state 4; C. opacicollis); (F) type F (state 5; Cnemonyx boliviae); (G) type G (state 6; C. rugulosus); (H) type H (state 7; Camptocerus distinctus); (I) type I (state 8; C. quadridens); (J) type J (state 9; Scolytus schevyrewi); (K) type K (state A; Cnemonyx insignis); (L) type L (state B; C. errans); (M) type M (state C: Scolytus excavatus); (N) type N (state D; Cnemonyx vestitus); (O) type O (state E; Scolytopsis peruanus); (P) type P (state F; Camptocerus unicornus).