Camptocerus angustior Eggers, 1928

Smith, Sarah M. & Cognato, Anthony I., 2010, A taxonomic revision of Camptocerus Dejean (Coleoptera: Curculionidae: Scolytinae), Insecta Mundi 2010 (148), pp. 1-88 : 64-68

Camptocerus angustior Eggers

(Fig. 42, 69)

Camptocerus angustior Eggers 1928: 91 . Lectotype: male, BOLIVIA: Yungas: 1000 m (USNM). Lectotype designated Anderson and Anderson 1971: 4.

Diagnosis. This species has metallic bronze elytra. The male of the species is distinguished by a conical median tubercle on the apical epistomal margin, by the constricted proximal epistomal margin, by the nearly sulcate anterior pronotal margin (Fig. 5b), by the less rugose basal half of pronotum, by the larger, deeper pronotal punctures and by the more shallow strial punctures.

The female is distinguished from those of C. aeneipennis by the unimpressed striae and cannot be distinguished from C. noel . This species occurs at higher elevations (1200-3000m) as compared to C. aeneipennis or C. noel .

Redescription (male). 5.0- 5.8 mm long (mean = 5.5 mm; n = 4); 1.9-2.0 times as long as wide. Head, antennae, thorax, abdomen and legs black; elytra metallic bronze to black.

Epistoma strongly excavated, expanded to greater than quarter length of head; surface shagreened; each lateral margin with a sub-acute, arcuate costa pointing distally; apical margin armed with a conical median tubercle 1.5 times longer than base width; basal margin armed with a transverse, concave carina (Fig. 2a); proximal margin distinctly constricted. Frons strongly excavated; surface shagreened; bearing dense long white to yellow hair-like setae; margin of excavation bearing a single row of long hair-like setae. Antennal scape elongate and narrow, glabrous on proximal quarter, ventral half bearing setae, these equal to 1/3 length of scape; segments 2-7 of funicle bearing brushes of setae, these equal to the length of scape; segments 2-7 of funicle bearing setae on dorsal margin, these less than length of 3 segments; anterior face of the club setose, with a partial septum.

Apical pronotal margin declivous, partially sulcate (Fig. 5b), area between eyes lined with fine bifid setae; glabrous, smooth, shining, minutely punctured; weakly rugose creating a wrinkled appearance; base straight (Fig. 8a), with a transverse medial groove; carina on lateral margin type B (Fig. 7b).

Scutellum shape type A ( Fig. 12a ).

Elytral sides parallel, narrowing to a smooth apex; base never tumid from interstriae 7-9. Glabrous, smooth, shining; minutely punctate; interstrial punctures strongly confused. Discal striae not impressed. Tenth interstriae with a carina shorter than metepisternum. Metepisternum shape type B ( Fig. 9b ); setae bifid. Mesosternum shape type A ( Fig. 10a ).

Male genitalia. Median lobe arcuate, lateral and apical margins with moderate sclerotization; lateral folds narrow, uniformly arcuate; apex rounded with flat lateral margins, entire surface except apical margin covered with fine, pale and long hair-like setae; lateral margins of median lobe folded dorsally, thick, broadly arcuate from apex to median struts, forming a thicker subacute point in middle; from each subacute point arises a ventrally projecting, lightly sclerotized, narrowly and gradually constricting lobe, lobe apices on apical quarter of median lobe, apices round; apical orifice lightly sclerotized. Median struts stout, laterally compressed and wider basally, slightly more than a third of body length. Internal sac central area membranous; seminal through membranous ( Fig. 69). Tegmen semi-circular, ventral side elongated

Figure 42. Camptocerus angustior , 5.0- 5.8 mm, male. proximally. Spicule destroyed in dissection.

Lateral (A), dorsal (B); male head anterior (C), anterior

Female. Similar to male except epistoma less oblique (D). than a quarter length of head, with a small median tubercle. Each gena with a crescent-shaped mycangium (Fig. 4b). Segments 4-7 of funicle bearing setae on dorsal margin, these less than length of 2 segments. Apical pronotal margin weakly sulcate (Fig. 6b), area between the eyes lined with scales; disk finely sculptured, smooth, shining; transverse medial groove on base absent. Female specimen missing majority of frons.

Specimens examined. (5M, 1F)

Type material. Lectotype, Camptocerus angustior , M ( USNM) ; Paralectotypes, BOLIVIA: No specific locality: ‘Bolivia’, 1M (BMNH) 1F (USNM). COLOMBIA: Tolima: (Natagaima), E. Pehlke S., 1915, (M. Hagedorn), 1M (USNM).

Other material. PERU: Junín: Utcuyacu, Tarms , iii.1948, (F. Woytkowski), 1M ( AMNH) ; 1600–3000 m, 12.iii.1948, (F. Woytkowski), 1M ( AMNH) .

Hosts. Unknown.

Biology. Unknown.

Apical pronotal declivity weakly sulcate (nearly round) (Fig. 5b), area between eyes lined with fine bifid setae; glabrous, smooth, shining, minutely punctured; basal half deeply rugose creating a wrinkled appearance; base straight (Fig. 8a), with a transverse medial groove; carina on lateral margin type B (Fig. 7b).

Scutellum shape type A ( Fig. 12a ).

Elytral sides parallel, narrowing to a smooth apex; base never tumid from interstriae 7-9. Elytra glabrous, smooth, shining. Discal interstriae with strongly confused. Tenth interstriae with a carina longer than metepisternum. Metepisternum shape type B ( Fig. 9b ); setae bifid. Mesosternum shape type A ( Fig. 10a ).

Male genitalia. Median lobe arcuate, lateral and apical margins with moderate sclerotization; lateral folds thick, uniformly arcuate; apex rounded with flat lateral margins, entire surface bearing fine, pale and long hair-like setae except apical margin; lateral margins of median lobe folded dorsally, thick, broadly arcuate from apex to median struts. Median struts stout, laterally compressed and wider basally, slightly less than a third of body length. Internal sac central area membranous; seminal valve on apical quarter bilobed, moderately sclerotized, more sclerotization on margins, moderately sclerotized below base of sensory claspers; internal sac appears to be continuous with right sensory clasper; sensory claspers heavily sclerotized, dorsoventrally flattened, scythe shaped, slightly curved, equal in size; apex of left clasper projecting right, subducted under right clasper, apex of right clasper projecting left ( Fig. 70). Tegmen semi-circular, ventral side elongated proximally, spatulate and weakly emarginate. Spicule nearly longer then aedeagus, sickle-shaped.

Female. Similar to male except epistoma less than a quarter length of head and bearing a small median tubercle. Frons weakly convex, bearing sparse short setae; surface shagreened, with small, deep punctures; lateral and dorsal margins reticulate; a triangular impressed area originating between the eyes and terminating at the distal and lateral epistomal margins, the triangle is bisected by a shallow carina on the median line. Each gena with a crescent-shaped mycangium (Fig. 4b). Segments 4-7 of funicle bearing setae on the dorsal margin less than length of 2 segments. Pronotal apical area between the eyes lined with scales; disk smooth, shining; transverse medial groove on base absent.

Specimens examined. (32M, 94F)

Type Material. FRENCH GUIANA: Passoura [River], vi.1907, (E. Le Moult), F (MNHN).

Other material. BRAZIL: Amazonas: Reserva Ducke , 26 km NE Manaus, ex. malaise trap, ii.1995, (M.G.V. Barbosa), 1M ( BMNH) ; 69 km N Manaus , 7.xii.1979, (G. Stevens), 8M, 7F ( USNM) ; Manaus , ‘ Corcovado, N.P. ’ [error?- this park is in Costa Rica], 26.xi.1979, (G. Stevens), 1F ( USNM) ; Mato Grosso: 12 o 31’S, 51 o 46’W, R.S. & R.G.S. Exped., ex. dry forest, 12-18.xi.1968, (O.W. Richards), 1M ( BMNH) ; [Mato Grosso]: 12 o 31’S, 51 o 46’W, RS-RGS, 12-18.xi.1968, (R.A. Beaver), 6M, 8F ( USNM) ; Rondônia: BR: 364, km 48, ex. armadilha de malaise [= malaise trap], 27.ix.1979, (Cecil Blancardi), 1M ( USNM) . ECUADOR: Napo: Reserva Ethnica Waorani , 1 km S Onkone Gare Camp, -0.652778, -76.433333, 220 m, ex. canopy fogging, vii.1994, (T.L. Erwin et al.), lot 744, 1M ( USNM), 1M, 1F ( MSUC) ; x.1994, lot 936, 1F ( USNM) ; i.1995, lot 961, 1M, ( USNM) ; x.1995, lot 1265, 3M, 3F ( USNM), 1F ( MSUC) ; x.1995, lot 1495, 1M ( MSUC) ; x.1996, lot 1755, 1M, 2F ( USNM) . GUYANA: [= Region 8]: Iwokrama Forest, Pakalau hills, 4.748333, -59.026667, 70 m, ex. beating treefall litter, 27.v.2001, (R. Brooks, Z. Falin), 1M ( SMEC) ; ex. on bark, downed tree, 27.v.2001, (R. Brooks, Z. Falin), 1M ( SMEC) . PERU: Madre de Dios: Los Amigos Biological Station , -12.56916, -70.100114, 250 m, 10-16.v.2008, (Smith, Hulcr), 2M, 45F ( MSUC) ; 17- 25.v.2008, (Smith, Hulcr), 3M, 24F ( MSUC) ; Tampopata, 15 km NE Puerto Maldonado, Reserva Cuzco Amazonico , Quebrada Mariposa , -12.55, -69.55, 200 m, flight intercept trap, 13-15.vi.1989, (A. Leschen), 1M ( SMEC) ; No specific locality: ‘ Ibaria’ (?), Rio Pachitea , 120 m, 10.xii.1967, (R. Garcia ), 1M ( MUSM) .

Distribution. Brazil (Amazonas, Mato Grosso, Pará, Rondônia), Ecuador (Napo), French Guiana, Guyana, Peru (Madre de Dios).

Hosts. Protium amazonicum Swart (Burseraceae) , Protium sp. (“Almesca branca” [ Brazil], “Almesca vermelha” [ Brazil], “Breu branco” [ Brazil]) ( Beaver 1972).

Biology. Camptocerus aterrimus infest 2 - 5 cm

diameter branches and create a vertical maternal

gallery extending above and below the entrance

tunnel in the pith of small branches and twigs.

Two short radial maternal galleries may also be

created in larger stem. Females lay single eggs

along the maternal gallery in wide niches cut at

right angles to the gallery and plugged with bor-

ing dust. Larvae enlarge their cradles parallel to

the maternal gallery and parallel to the grain of

wood. Beaver (1972) provides a detailed descrip-

tion of the life history.

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).