Camptocerus rectus Wood, 1972

Smith, Sarah M. & Cognato, Anthony I., 2010, A taxonomic revision of Camptocerus Dejean (Coleoptera: Curculionidae: Scolytinae), Insecta Mundi 2010 (148), pp. 1-88 : 40-42

Camptocerus rectus Wood

(Fig. 25, 56)

Camptocerus rectus Wood 1972: 245 . Holotype:

male, VENEZUELA: Barinas: 40 km E Can-

ton, 70 m, ex. Protium tenuifolium , 8.iii.1970,

(S.L. Wood) (USNM).

Diagnosis. The male is distinguished by a trans-

verse, straight and moderately developed sub-acute

carina that is highest medially and nearly tuber-

culate.

The female is distinguished by a faint trian- Figure 25. Camptocerus rectus 3.5-4.3 mm, male. Lateral gular impression encompassing the region from (A), dorsal (B); male head anterior (C), anterior oblique (D); female head anterior (E), anterior oblique (F).

the epistoma to just below the upper level of the

eyes.

Redescription (male). 3.5-4.3 mm long (mean = 4.0 mm; n = 20); 1.8-2.1 times as long as wide. Color uniform. Head, pronotum, thorax, abdomen, elytra, antennae and legs red-brown to dark brown. Elytral

interstriae bearing small, variegated, stout, tan and dark brown spatulate setae forming highly variable patterns ( Venezuela) or uniformly tan ( Ecuador).

Epistoma weakly excavated, expanded to less than quarter length of head, apical epistomal margin unarmed; surface shagreened; lateral margins angled proximally, each bearing 1-3 rows of setae; basal epistomal margin bearing a straight, sub-acute, strongly developed carina, that is highest medially and nearly tuberculate (Fig. 2c); the carina is ventrally lined with 3 rows of setae. Frons strongly excavated, with the excavation bordering the ocular margin and the posterior margin of the basal epistomal carina; surface shagreened, densely covered by 2 thick bands of pale, long yellow setae; single row of spatulate setae lining lateral margins; lateral and dorsal margins are rounded. Antennal scape elongate and narrowly rounded distally; scape with a row of setae on ventral margin; ventral margin of funicular segments 2-7 bearing brushes of setae 2 times the length of scape; segments 5-7 bearing setae on posterior margin as thick as those on ventral margin and 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 lined with scales; apical third strigulate; basal two-thirds smooth with dense, deep, minute punctures; punctures and vestiture on median line; anterior third bearing long bristles; base and disk bearing short, fine hair-like setae; 2 rows of short bristles above lateral carinae; base strongly bisinuate (Fig. 8c); carina on lateral margin type F (Fig. 7f).

Scutellum shape type C ( Fig. 12c ).

Elytral sides parallel, narrowing to a smooth apex; base never tumid from interstriae 7-9. Disk with each interstriae bearing 3-4 rows of semi-erect, stout, spatulate setae and 1-3 rows on declivity; interstriae 3-4 times the width of striae; interstrial punctures strongly confused. Declivity occupying apical half of elytra; each interstriae bearing 2 rows of semi-erect, spatulate setae; interstria 1 with uniseriate spatulate setae on apical third; striae not impressed, punctures each with a hair-like seta arising from the basal margin, those covering puncture. Tenth interstriae without a carina. Metepisternum shape type G ( Fig. 9g ); setae palmately divided into 4 or more filaments. Mesosternum shape type C ( Fig. 10c ).

Male genitalia. Median lobe arcuate, lateral and apical margins with more sclerotization; apex rounded with flat lateral margins; apical orifice lightly sclerotized, lateral margins folded dorsally, each forming a triangle with an apex just below the midpoint of median lobe. Median struts stout, a third of body length; apical orifice membranous. Internal sac lightly sclerotized, apically trident shaped, apex divided into 2 dorsoventrally flattened lobes, ventral lobe reniform, arcuate laterally; dorsal lobe projecting above ventral lobe, flat; basal half composed of 2 narrowly elongated projections ( Fig. 56). Tegmen semi-circular, ventral side elongated proximally. Spicule destroyed in dissection.

Female. Similar to male except epistoma weakly impressed, less than a quarter length of head and unarmed; covered by 4 rows of setae. Frons flat, with a faint triangular impression encompassing the region from the epistoma to just below the upper level of the eyes; 5 rows of setae lateral to median line. Each gena with a triangular mycangium (Fig. 4d). Segments 5-7 of funicle bearing setae on dorsal margin, those less than the length of 3 segments. Pronotal anterior third covered with dense hair-like setae on anterolateral areas; long bristles absent; base and disk covered with short, fine hair-like setae.

Specimens examined. (25M, 28F)

Type Material. Holotype Camptocerus rectus , M ( USNM) ; Allotype Camptocerus rectus F ( USNM) ; Paratypes VENEZUELA: Barinas, 40 km E Canton , 70 m, ex. Protium tenuifolium , 8.iii.1970, (S.L. Wood), 3M, 5F ( USNM) ; 9 km S Barrancas , 150 m, ex. Protium sp. , 2.xii.1969, (S.L. Wood), 2M, 2F ( USNM) ; 10 km SE Miri , 150 m, ex. Protium tenuifolium , 8.ii.1970, (S.L. Wood), 3M, 1F ( USNM) ; 40 km SE Socopo , 150 m, ex. Protium sp. , 25.i.1970, (S.L. Wood), 4M, 8F ( USNM) .

Other material. ECUADOR: Napo: Reserva Ethnica Waorani , 1 km S Onkone Gare Camp, -0.652778, -76.433333, 220 m, ex. canopy fogging, (T.L. Erwin et al.), lot 1464, i.1996, 1M ( USNM) ; ex. canopy fogging lot 1496, i.1996, 1M ( USNM) . VENEZUELA: Barinas: 40 km E Canton , 70 m, ex. Protium tenuifolium , 8.iii.1970, (S.L. Wood), 1M, 3F ( MSUC) ; 10 km SE Miri , 150 m, ex. Protium tenuifolium , 9.ii.1970, (S.L. Wood), 2M, 4F ( MSUC) ; 40 km SE Socopo , 150 m, ex. Protium sp. , 22.i.1970, (S.L. Wood), 2M ( MSUC), 5M, 5F ( USNM) .

Distribution. Ecuador (Napo), Venezuela (Barinas).

Hosts. Protium spp . ( Burseraceae ), Protium

tenuifolium [= Protium tenufolium (Engl.) Engl. ].

Biology. Wood (2007) describes the biology as simi-

lar to that of C. aeneipennis , although the gallery

pattern likely resembles that of C. auricomus and

C. niger based on their close relationship to C. rec-

tus. Camptocerus auricomus and C. niger exca-

vate a short circumferential gallery below the bark

on both sides of the entrance tunnel. Colonization

occurs in tree limbs with a diameter less than 10

cm ( Wood 2007).

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).