Oreodera glauca ( Linnaeus, 1758 )

Casari, Sônia A., 2016, Morphology of Immatures of Acanthoderini (Cerambycidae, Lamiinae), Zootaxa 4139 (1) : -

Oreodera glauca ( Linnaeus, 1758)

( Figs. 1‒11 , 58‒63 )

Redescription of larva. Length: 35 mm. Elongate, cylindrical, slightly flattened ( Figs. 58‒60 ). Coloration yellowish-white; exposed area of head capsule dorsally light brown and ventrally reddish-brown, with anterior dark-brown band forming mouth frame; brownish labrum; black mandibles; maxillae and labium yellowish with light brown bands; pronotum yellowish with transverse irregular yellow basal band; prothorax ventral yellowish laterally; sternellum with two darker yellowish lateral elliptical patches. Ampullae tuberculate and not spiculate. Pubescence fine, ferrugineous, of varied lengths, longer laterally.

Head ( Figs. 1, 2 , 58‒60 ) extensible, deeply retracted into prothorax; exposed area 0.42X head length; glabrous except for lateral and anterior regions; prognathous, moderately flattened. Head capsule strongly narrowed on posterior half; posterior margin feebly prominent at middle; each side of median suture weakly striate. Median suture and endocarina present. Frontal suture weak, marked by a narrow clear line. Epistomal margin slightly emarginate at middle, strongly sclerotized, with three setae on each side, near anterior margin (mid pair short). Each epicranial half with six setae inside frontal area, one short outside of frontal suture, and four setae below each antenna; ventrally with ten setae on each side: three long and one short near anterior margin, four near lateral margin, and two near hypostomal suture. One stemma each side, below antenna. Occipital foramen very large, entire, elliptical and wider anteriorly. Gular suture long with three setae and at least three setal pores on each side. Antennae ( Figs. 3, 4 ) minute, retractable, with two transverse antennomeres: basal, with one dorsal campaniform sensillum; distal, bearing at apex one well developed membranous conical sensorial appendix, two long setae (longer than sensorium) and five short and wide setae. Antennal foramen opened posteriorly. Clypeus ( Fig. 5 ) membranous, trapezoidal and glabrous, 4.4X wider than long. Labrum ( Fig. 5 ) semicircular, 1.7X wider than long, bearing numerous setae near anterior margin. Epipharynx ( Fig. 6 ) with anterior and lateral margins rounded, and with numerous long setae inwardly directed on distal third; one longitudinal sclerite on each side of basal half; between sclerites, microspines and short setae forwardly directed. Mandibles ( Figs. 7‒9 ) symmetrical, widest at mesal region; cutting edge wide, oblique; grooved and microstriate in a longitudinal elliptical area near apex of mesal region; outer face with wide longitudinal dorsal median weak furrow, rounded at base, and two setae near base. Maxillae ( Figs. 10, 11 ) ventrally partially membranous; stipes short with brown, inclined, transverse band near base and long setae on inclined row near darker area; cardines and maxillary articulating areas fused to postmentum; mala elongate, shorter than palpus, with rounded apex; basal irregular light brown ventral band and numerous long setae dorsal and ventral. Palpifer ventrally with wide brown band near base; numerous setae of varied sizes ventral and dorsal; dorsally with a row of long setae and one patch of microspines near anterior margin. Maxillary palpi with three elongate palpomeres: basal, bearing ventrally, one campaniform sensillum near base and two near apex, one long seta and numerous small punctures near apex, and dorsally, four long setae near apex and one patch of microspines near middle; median, ventrally with one campaniform sensillum near base and one near apex, two long setae and several small punctures near apex, and dorsally, one lateral long seta near apex; distal, shorter with one short laterointernal seta and peg-like sensilla at apex. Labium ( Fig 10 ) ventral: postmentum membranous bearing nine setae each side (one very long) and numerous tiny rounded brown patches; prementum wider than long, narrowed and brown at basal half; palpiger membranous bearing numerous setae of varied sizes; ligula wide, membranous, emarginate anteriorly with numerous long setae. Labial palpi with two elongate palpomeres: basal, bearing near apex one campaniform sensillum, a row of long setae and numerous small punctures; distal, bearing one campaniform sensillum near base and one near apex, and peg-like sensilla at apex. Hypopharynx ( Fig. 11 ) membranous, bulging, with two elongate sclerites at base; anterior margin emarginate at middle; laterodistal third with long setae forwardly directed; basal 2/3 microspined anteriorly and laterally, with numerous campaniform sensilla at middle.

Prothorax, widest segment of body, wider than long, narrowed anteriorly; lateral pronotal furrows and alar lobes present; postnotal fold indistinct; presternum and eusternum distinct; sternellum well defined, weakly sclerotized, without legs; setae ventrally more concentrated near anterior margin. Pronotum with moniliform tubercles on basal third; eusternum tuberculate near anterior margin. Meso- and metathorax short, band-like; mesothorax slightly shorter and wider than metathorax; mesothorax almost as width as prothorax. Mesothorax ventral and metathorax dorsal and ventral with one transverse furrow with one row of moniliform tubercles each side; setae longer laterally. A very large ventrolateral anterior elliptical spiracle ( Fig. 59 ), between pro- and mesothorax; spiracle protruded and located lower than other spiracles.

Abdominal segments I‒VII increasing in length; segments VII‒VIII wider than previous; segment VIII slightly shorter and narrower than VII; segment IX narrowed apicad, with rounded apex; segment X reduced, with two apicoventral and one apicodorsal lobes. Segments I‒VII dorsally and ventrally weakly furrowed longitudinal medially, each with one large, elliptical and prominent ambulatory ampulla; each ampulla with one transverse slightly V-shaped furrow at middle, with two or three irregular rows of moniliform tubercles anteriorly and one or two rows posteriorly, and numerous moniliform tubercles each side, forming a rounded irregular lateral area. Segment VIII dorsally with smaller ampulla. Segments I‒VIII each with one elliptical lateroanterior spiracle, smaller than thoracic, decreasing in size apicad; one epipleural tubercle below each spiracle. Each epipleural tubercle with one pair of sclerotized pits. Setae of abdomen longer laterally.

Description of pupa ( Figs. 61, 62 ). Length: 21 mm. Coloration yellowish-white with reddish-brown small spines, each with one brown long seta at base or near base; spines increasing in size to body apex direction.

Head partially visible dorsally, with eight pairs of spines each with one long, simple or ramified seta at base, more concentrated at frontal area; one pair of longer setae internal each antennal tubercle. Each eye with two spines, each with one basal seta; three pairs below each eye. Labrum with transverse row with four or five pairs of spines, each with one basal seta. Each mandible with two lateroexternal tiny spines (inconspicuous), each with one long simple seta. Antennae extending from base of ventrite I and curved ventrally and directed anteriorly.

Pronotum wider than long; lateral margins prominent near middle, forming an angular projection each side; two weak rounded tubercles near anterior margin; numerous spines near anterior margin and some dispersed by whole surface of pronotum, each with one basal seta. Meso- and metanotum, each with two inclined, convergent rows of spines, denser and longer on metanotum, each spine with one basal seta. Mid and hind femora with a long blunt process near base; all femora near apex with a row of spines, each with one basal seta.

Abdomen: dorsally, segment I with a transverse band of spines, interrupted at middle; segments II-VI with an anterior elliptical, narrow patch, and a transverse basal irregular band of spines, interrupted at middle, each spine with one basal seta. Segment VII longer and sub-triangular with spines more concentrated near middle. Segment VIII short, band-like, each side with four well developed dorsal spines, each with one basal seta. Segment IX narrow and band-like, each side with three well developed dorsal and three ventral spines; each spine with one basal seta. Segment X reduced, ventral and trilobed. Segments I-VI with lateral elliptical spiracle.

Material examined. BRAZIL. Pará: Santo Antonio do Tauá (em Jaqueira [jackfruit tree]), 29.X.2001, P. Jauffret col., 1 larva, 1 pupa, 1 adult fixed ( MZSP 9831).

Remarks. The larva of Oreodera glauca was first described by Duffy (1960), based on material collected on Pterocarpus Fabaceae in Guyana. The immatures studied herein were collected in Artocarpus heterophyllus Lam. , Moraceae (jackfruit tree) in north of Brazil.

The Oreodera larvae, represented by O. glauca , present mandibles without pore on apical third of outer face; laterobasal setae of prementum absent; gular suture present, with three setae each side; posterior third of pronotum darker and with moniliform tubercles; sternellum with lateral elliptical weakly sclerotized patches; and ampullae of abdomen with one transverse V-shaped furrow at middle with two or three rows of moniliform tubercles anteriorly and one or two rows posteriorly, and laterally with numerous moniliform tubercles each side, forming a rounded area. The pupa is similar to other Acanthoderini except for the absence of spines at apex of lateral projection of pronotum and presence of two spines each eye. The pubescence is very sparse.

Figures

FIGURES 1 ‒ 11. Oreodera glauca (Linnaeus, 1758). Larva: 1, 2, head (dorsal, ventral); 3, 4, antenna (dorsal, ventral); 5, frons, clypeus and labrum; 6, epipharynx; 7 ‒ 9, mandible (external, dorsal, ventral); 10 ‒ 11, labium and maxilla (ventral, dorsal). Bars = 1 mm, except figs. 3, 4 = 0.1 mm; figs. 6, 10, 11 = 0.5 mm.

FIGURES 58 ‒ 69. Habitus. 58 ‒ 63, Oreodera glauca (Linnaeus, 1758): 58 ‒ 60, larva (dorsal, lateral, ventral); 61 ‒ 62, pupa (dorsal, ventral); 63, adult (dorsal). 64 ‒ 69, Psapharochrus cylindricus (Bates, 1861): 64, adult (dorsal); 65 ‒ 67, larva (dorsal, lateral, ventral); 68 ‒ 69, pupa (dorsal, ventral).