Insignorthezia insignis (Browne)

Vea, Isabelle M., 2014, Morphology of the males of seven species of Ortheziidae (Hemiptera: Coccoidea), American Museum Novitates 2014 (3812), pp. 1-36 : 9-11

Insignorthezia insignis (Browne)

Figures 3B , 4

Orthezia insignis Browne, 1887: 169–172 .

MATERIAL EXAMINED: CEYLON ( SRI LANKA), Paredeniya , xi. 1940, E.E. Green coll., 1/5 ad male, deposited at BNHM .

DESCRIPTION (as for family description unless otherwise stated): Mounted material: Moderately large, total body length 1.66 – 1.76 mm. Antennae exceptionally long, nearly 2 times total body length, most segments approximately subequal in length (vs. <1.3 times body length for all other species). Body with few setae; lp of triangular shape, each 7–8 µm wide, with mostly 3 loculi, occasionally 4, present on both dorsal surface.

Head: Width 285 µm and length 300 µm. Dorsally, with (on each side) about 5 hs of rather variable length (20–50 µm), all flagellate, plus 2 lp and 1 or 2 mcp. Laterally, compound eye about 155 µm long, with about 160 ommatidia. Ocellus 30–40 µm wide. Ventrally, ventral arm extending to midlength of head, fusing with preoral ridge and bifurcated posteriorly; ventral head setae: with (on each side) 8–12 hs plus 1–4 lp + 3 or 4 mcp. Antenna: Length 3.23 mm (ratio of total body length to antennal length 1:1.9). Scape: 94–117 µm long, 63–80 µm wide, each with 6 or 7 short hs + 2 or 3 minute pores ventrally and 4 hs dorsally. Pedicel: 65–85 µm long, 49–57 µm wide; each with 3 fs, 5 or 6 hs, 3 minute pores ventrally. Segments III–IX with proximal segments about 36–43 µm wide, while apical segment only 15–24 µm wide: fs short, those on segment III 28–38 µm long, those on apical segment 25–30 µm long; lengths of segments (µm): III 369–405; IV 433–479; V 423–509; VI 381–520; VII 400–494 and VIII 400–600; approximate number of setae per segment: III–VIII; about 45–70 fs +10–15 hs; no bristlelike setae detected. Segment IX elongate: 346–412 µm long; with about 80 fs + 1 strong terminal bristle, about 35 µm long + 1 antennal bristle laterally near apex.

Thorax: Prothorax: dorsally, pronotum not observable. Posttergites each a small, lightly sclerotized, oval area situated mediolaterally. Pronotal setae: median pronotal setae: 1 hs plus 2 or 3 lp + 2 or 3 smp; propleural setae not detected; also with a group of posterior propleural setae and pores just anterior to each prealare, extending ventrally and joining antemesospiracular setae: 1 hs, 5–6 lp + 3–5 smp. Ventrally, Prosternum with 1 hs prosternal setae + 1 lp on each side. Mesothorax: Dorsally, prescutum, 97 µm long, 134 µm wide; ridges as for family. Distance between prescutum and scutellum medially 97–117 µm; with about 2 hs scutal setae: + 15 minute pores medially posterior to prescutum. Scutellum anterior margin rounded and posterior margin straight, 170–181 µm wide, 109–112 µm long, with 2 lp + 3 smp but no setae. Laterally, tegula with 2 or 3 setae. Mesothoracic spiracle: peritreme almost round, width about 30 µm. Ventrally, basisternum 390 µm wide, 180 µm long; with about 10 hs basisternal setae. Metathorax: Dorsally, metapostnotum with 2 metatergal setae. Dorsospiracular setae: 1 hs plus 2 lp. Laterally, metathoracic spiracle peritreme almost round, width 35 µm. Ventrally, sclerotized area with 3–5 hs + 1 lp + some smp on each side; occasionally with 1 hs anterior metasternal seta and 0 or 1 hs posterior metasternal setae. Wings: Forewing length and width unknown because wings damaged, hamulohalteres with 2 hamuli. Legs: Coxae: I: 126–160; II: 129–148; III: 136–146 µm long; coxa III with about 4 setae. Trochanter + femur: I: 603–686; II: 527–597; III: 603–673 µm long; trochanter III with about 5 setae; each trochanter with 4 campaniform on each side; femur III with about 40 setae + 10 smp. Tibiae: I: 882–804; II: 776–805; III: 801–918 µm; tibia III with a total of about 115 setae + 5 smp; spurs on ventral surface of distal end of tibia similar to those anteriorly; each distal spur 26–30 µm long. Tarsi: I 187–200; II 184–212; III 194–212 µm long (ratio of length of tibia III to length of tarsus III 1: 0.44); tarsus III with about 30 setae, mainly spurlike; tarsal digitules very short and setose. Claws fairly long and thin, much longer than width of tarsus (each tarsus about 25 µm wide), held at a distinct angle to tarsus, each with a small denticle; length: III 60 µm; claw digitules both short and setose.

Abdomen: Segments I–VII: Tubular ducts present in as a band across tergite VII, each duct 8 µm wide, 20 µm deep, with a slightly spirally ridged inner surface. Dorsal abdominal setae and pores (totals): segments I–V: 4 extremely long hs (80–100 µm); VI: 4 extremely long hs + some lp, group fusing with pleurites; VII: about 20 hs and 20–25 tubular ducts. Pleural setae: dorso- and ventropleural setae combined on each side: I– VII: 3 or 4 hs + 12–20 lp + 15–25 smp, most setae about 50–60 µm long. Ventral abdominal setae fleshy and shorter than dorsal abdominal setae, each 35–40 µm long (totals): I 8 fs; II 8 or 9 setae; III–VI 10–12 fs; VII 6–8 fs; lp absent on all sternites. Abdominal spiracle at least present from segment III to VII each peritreme about 10 µm wide. Segment VIII: tergite with 1 or 2 pairs of hs dorsal abdominal setae, plus about 40 small locular pores and many smp; sternite with about 10 ventral abdominal setae but no pores; margin rounded, with 2–4 hs pleural setae, 3 or 4 lp + 2–4 smp. Genital segment: Anus large (32 µm wide); with 1 or 2 hs on tergite IX; sternite IX without a median ridge, with 3 or 4 setae. Penial sheath as broad as posterior margin of abdominal segment VIII, length without segment IX 190 µm, with segment IX 243 µm; greatest width 140 µm; ventrally and laterally with a group of 20 hs on each side of anterior end of penial sheath. Aedeagus about 170–190 µm.

COMMENTS: The adult male of I. insignis is unique in having extremely long appendages, particularly the antennae, almost twice as long as the body length, as compared to other genera; a pair of very long setae are present on each tergite, loculate pores of 3 or 4 loculi are on the pleurites and overlapping on tergites but absent on sternites, and sternite VIII does not have a median ridge (similar to Orthezia , but in constrast to Graminorthezia and Praelongorthezia ).

Figures

FIGURE 3. Confocal microscope images of the last abdominal and genital segments in the males of four genera in the Ortheziidae, from specimens mounted in Canada balsam. A. Dorsal surface of Graminorthezia graminis (Tinsley), uncleared specimen. B. Lateral side of Insignorthezia insignis (Browne), cleared specimen. C. Dorsal surface of Orthezia newcomeri Morrison, cleared specimen. D. Dorsal surface of Praelongorthezia praelonga (Douglas), cleared specimen. Abbreviations: abs, abdominal spiracle; ae, aedeagus; lhs, long hair seta; lp, loculate pore; ps, penial sheath; pss, penial sheath seta; slp, small locular pores; stnVIII, sternite VIII; stnIX, sternite IX; tbd, tubular duct; tbdp, tubular duct plate. Scale: 100 µm.

FIGURE 4. Insignorthezia insignis (Browne). Adult male. A. Antennal apical seta. B. Claw. C1. Abdominal pore with four loculi. C2. Abdominal loculate pore with three loculi. D. Tubular duct with peripheral seta. E. Small locular pore. F. Penial sheath.