Camptocerus lucwildi Smith and Cognato, 2017

Smith, Sarah M. & Cognato, Anthony I., 2017, A New Species of Camptocerus Dejean, 1821 (Coleoptera: Curculionidae: Scolytinae: Scolytini) from Ecuador, The Coleopterists Bulletin 71 (3), pp. 445-448 : 445-447

Camptocerus lucwildi Smith and Cognato , new species

( Figs. 1–12 )

Type Material. Holotype, male. ECUADOR: Los R´ıos, Canton Valencia, Reserva Murocumba, -00.6389833°, -79.1493167°, 704 m, 24.III.2017, AI Cognato ( MSUC) . Paratypes, females, same locality as holotype ( MSUC, 1, PUCE, 1) .

Diagnosis. The male is distinguished from all other Camptocerus species by each elytron bearing one acute spine arising from the first to second striae. Camptocerus lucwildi is most similar to C. quadridens as both species bear large spines on the elytral bases. However, C. quadridens is restricted to the Panama Canal, and each elytron bears two short spines. The female closely resembles that of C. costatus and is distinguished by the red-brown color and often dark brown striae, the smaller size, and the less strongly impressed striae. The female is morphologically indistinguishable from that of C. quadridens . The species’ ranges presumably do not overlap, with C. quadridens occurring in Panama and C. lucwildi in Ecuador.

Description. Male. 3.0 mm long; 2.0 times as long as wide. Color uniformly red brown, apical 3/4 of pronotum may be dark brown ( Figs. 1–2 ). Head: Epistoma excavated, expanded to less than 1/4 head length, apical epistomal margin unarmed ( Figs. 3–4 ); surface shagreened; each lateral margin with a subacute, arcuate costa angled proximally, lined entirely with setae; basal epistomal margin bearing a short, transverse, rectangular carina. Frons strongly excavated; excavation borders the ocular margin; surface shagreened, densely punctate; bearing dense, erect, pale yellow, hair-like setae of equal length. Antennal scape elongate and broadly rounded distally, bearing a brush of hair-like setae on distal half, setae as long as scape; ventral margin of antennal funicular segments 2–7 bearing brushes of setae, these equal to 1.5 times length of funicle; funicular segments 2–7 bearing hair-like setae on dorsal margin, half length of setae on ventral margin; anterior face of club setose, with a partial septum. Pronotum: Apical pronotal margin broadly rounded ( Figs. 1–4 ), margin between eyes glabrous; surface smooth, densely and minutely punctate; median line impunctate; anterior fourth bearing 5–6 transverse setae on each side; a row of setae above lateral carinae; carina on lateral margin weakly arcuate (shape type D, see Smith and Cognato 2010); pronotal base recurved ( Fig. 2 ). Scutellum: Scutellum twice as wide as long, arcuate ( Fig. 2 ) (shape type I, see Smith and Cognato 2010). Elytra: Elytral sides parallel, narrowing to a smooth apex ( Fig. 2 ); base never tumid from interstriae 7–9; surface smooth, shiny. Disc with basal margin a weak carina extending to scutellar apex; a sharp, acute spine arising from the 1 st to 2 nd striae on each elytron, spine as long as the width between discal interstriae 1–3 ( Figs. 1, 5 ); spines extending over the declivity ( Figs. 1, 2, 6 ). Declivity originates in the recess formed under the spines, concavity strongly depressed until interstria 8, margin of declivity marked with a carinate costa to apex ( Fig. 6 ); concavity glabrous; striae not impressed; interstriae uniseriate, twice width of striae; punctures indistinct; apical half of declivity with erect bristles twice as long as setae on basal half; setae on basal half shorter, stouter, half length of bristles, semirecumbent; each seta arising at the base of a granule, spaced by a width of 1–2 strial punctures. Tenth interstria with a carina shorter than metepisternum. Apex entire. Mesosternum: Mesosternal process weakly procurved, not inflated, margin lined with a row of setae (shape type B see Smith and Cognato 2010). Metepisternum: Shape type I ( Fig. 1 )(see Smith and Cognato 2010); setae bifid.

Female. 3.0 mm, 2.0 times as long as wide. Similar to male except epistoma with 2 rows of setae on distal margin ( Fig. 9 ). Frons flat ( Fig. 10 ); short, sparse setae present on lateral margins. Each gena with a circular mycangium ( Figs. 7, 10 ). Antennal funicular segments 5–7 bearing setae on dorsal margin, setae less than length of 3 segments. Elytra finely sculptured, lacking both spines and carinate costae ( Figs. 11, 12 ). Disc covered with shallow rugosities from the sutural space to interstria 8 ( Fig. 8 ). Declivital interstriae 1–6 on apical half with a crenulation at the base of each puncture. Declivity with each interstrial puncture bearing a short bristle ( Fig. 8 ), bristles of equal length; striae weakly impressed.

Distribution. ECUADOR: Los R´ıos.

Biology. All specimens were collected from two galleries of the same host tree. Like all Camptocerus , they are xylomycetophagous, and galleries are female-initiated. Both galleries were constructed in a 4–5 cm diameter branch of a cut and felled tree (~ 20 cm DBH) located in a disturbed area comprised of forest mixed with field. The host was partly located in the sun and had died approximately 2–3 weeks before the specimens were collected (local guide, personal communication). Each female had recently initiated her gallery and had not progressed beyond constructing the entrance tunnel. The host also contained specimens of Acanthotomicus bidentis Wood, 1972 in the phloem of the same branch. Acanthotomicus bidentis is reported from Icica Aubl. (Burseraceae) , and Camptocerus are typically associated with Protium Burm. f. ( Burseraceae ) ( Wood 2007; Smith and Cognato 2010). Given the host records for these scolytines, it is likely that this host was Icica .

Etymology. Named for our son, Lucas Wild Cognato, with hope that he will find adventure as we did in unspoiled forest of some distant land.

Comments. This species belongs to the costatus clade (Smith and Cognato 2010) because it exhibits the synapomorphies of the circular mycangium, pronotal lateral margin type D (Smith and Cognato 2010), recurved pronotal base, scutellum shape type I (Smith and Cognato 2010), and basal margin of the elytra with a weak carina extending to the scutellar apex. This species increases the number of species in the costatus clade from four to five.

Figures

Figs. 1–12. Camptocerus lucwildi. Male habitus: 1) Lateral view; 2) Dorsal view; 3) Anterior view; 4) Anterior oblique view; 5) Posterior view; 6) Posterior oblique view. Female habitus: 7) Lateral view; 8) Dorsal view; 9) Anterior view; 10) Anterior oblique view; 11) Posterior view; 12) Posterior oblique view.