Camptocerus quadridens Blackman, 1943

Smith, Sarah M. & Cognato, Anthony I., 2010, A taxonomic revision of Camptocerus Dejean (Coleoptera: Curculionidae: Scolytinae), Insecta Mundi 2010 (148), pp. 1-88 : 58-60

publication ID

https://doi.org/ 10.5281/zenodo.5165174

publication LSID

lsid:zoobank.org:pub:57F87554-195B-4DE8-BD90-70EB9428F9D7

persistent identifier

https://treatment.plazi.org/id/6D3787F3-970B-0D32-64BC-5CEFFD32B877

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scientific name

Camptocerus quadridens Blackman
status

 

Camptocerus quadridens Blackman View in CoL

(Fig. 39, 67)

Camptocerus quadridens Blackman 1943: 379 View in CoL .

Holotype: male, PANAMA: Canal Zone :

Cooper’s, near source of Rio Aejeta, ex. fallen

tree, 19.vii.1923, (J. Zetek) ( USNM).

Diagnosis. The male of this species is distin-

guished by the short, transverse carina on the

lateral (D).

basal epistomal margin, by each elytron with 2

discal spines arising from the first to fifth striae,

with a sharp spine on the first striae and a blunt

spine on the second extending over the declivity,

and by the red-brown color.

The female is distinguished from that of C.

costatus by the red brown color and often dark

brown striae, by the smaller size, and by the less

strongly impressed striae.

Redescription (male). 3.4-3.7 mm long (mean = 3.6 mm; n = 4); 1.8-1.9 times as long as wide. Color uniformly orange to red brown.

Epistoma excavated, expanded to less 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; exca- Figure 39. Camptocerus quadridens male head anterior vation borders the ocular margin; surface (A), anterior oblique (B); female head anterior (C),

anterior oblique (D). shagreened; bearing dense, erect, pale yellow hairlike setae of equal length. Antennal scape elongate and broadly rounded distally, bearing a brush of hair-like setae on distal half, those as long as scape; ventral margin of segments 2-7 bearing brushes of setae, these equal to the 1.5 times the length of funicle; segments 2-7 of funicle bearing hair-like setae on dorsal margin, these half the length of those on ventral margin; anterior face of the club setose, with a partial septum.

Apical pronotal margin broadly rounded (Fig. 5a), area between eyes glabrous; surface smooth, densely and minutely punctate; median line devoid of punctures; anterior fourth bearing 5-6 transverse setae; a row of setae above lateral carinae; pronotal base recurved (Fig. 8b); carina on lateral margin type D (Fig. 7d).

Scutellum shape type I ( Fig. 12i View Figure 12 ).

Elytral sides parallel, narrowing to a smooth apex; base never tumid from interstriae 7-9. Disk with the basal margin a weak carina extending to scutellar apex (Fig. 11c); 2 spines arising from the first to fifth striae; a sharp spine on the first striae, and a blunt rounded spine on the second; spines extend over the declivity. Declivity originates in the recess formed under the spines, this area is moderately depressed until interstria 8, where a carinate costa originates above the middle of sternite 1 and terminates above the midpoint of sternite 5; interstriae uniseriate, twice width of striae; punctures indistinct; long, thin bristles on interstriae 1-4 in the concavity to the posterior third, those 2-4 times the length of other bristles. Tenth interstriae with a carina shorter than metepisternum. Metepisternum shape type I ( Fig. 9i View Figure 9 ); setae bifid. Mesosternum shape type B ( Fig. 10b View Figure 10 ).

Male genitalia. Median lobe flat, lateral and apical margins with light to moderate sclerotization; lateral folds thin and arcuate distally on basal half, apex broad; lateral margins of median lobe folded dorsally, forming a broad point on basal third. Median struts stout, laterally compressed and wider basally, a third of body length. Internal sac central area membranous, basal half of seminal valve lightly sclerotized with numerous heavily sclerotized veins, dorsoventrally flattened and folded basally, apical half forming 2 thin moderately sclerotized semi-circles at the apical orifice ( Fig. 67). Tegmen semi-circular, ventral side short. Spicule destroyed in dissection.

Female. Similar to male except epistoma with 2 rows of setae on distal margin. Frons flat; short, sparse setae present on lateral margins. Each gena with a circular mycangium (Fig. 4c). Segments 5-7 bearing setae on the dorsal margin, these less than length of 3 segments. Elytra finely sculptured, lacking both spines and carinate costae. Disk covered with shallow rugosities from the sutural space to interstria 8. Declivital interstriae 1-5 on apical half with a crenulation at the base of each puncture, each bearing a short bristle, bristles of equal length; striae weakly impressed.

Specimens examined. (5M, 2F)

Type Material. Holotype Camptocerus

quadridens, M (USNM).

Other material. PANAMA: Canal Zone: Barro

Colorado Island, ex. trap, 13.ii.1980, (Henk Wolda),

1M (UCDC); 21, 24, 26.vii.1986, 1M ( MSUC) ; 21,

23, 25.vii.1986, 1F (MSUC), 1-3.vii.1987, 1M

(UCDC); Panama: Cerro Jefe , 19 o 12’N, 79 o 21’W GoogleMaps ,

24.ii.1973, (H. Stockwell), 1M (USNM); Cerro Jefe,

2200’, 25v-1.vi.1992, (J.E. Wappes), 1F (TAMU).

Distribution. Panama.

Hosts. The holotype was collected on the same

date and in the same locality as C. aeneipennis .

These C. aeneipennis were collected from a Pro-

tium species ( Burseraceae ) and since multiple spe-

cies often colonize the same host, Protium is the

probable host ( Wood 1982).

Biology. Unknown.

Discussion. This is the first time that a female

has been identified for this species. It was found in

a museum rather than collected in the field, so its

identity is hypothesized. Camptocerus quadridens

displays marked sexual dimorphism similar to that

of its sister taxa, C. costatus and C. pilifrons .

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Curculionidae

Genus

Camptocerus

Loc

Camptocerus quadridens Blackman

Smith, Sarah M. & Cognato, Anthony I. 2010
2010
Loc

Camptocerus quadridens

Blackman, M. W. 1943: 379
1943
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