Eriococcus munroi, Boratynski

Hodgson, Chris, 2005, The adult males of Coccoidea (Hemiptera: Sternorrhyncha) known from Greenland, Zootaxa 907, pp. 1-48 : 34-38

ERIOCOCCUS MUNROI (Boratynski) ( Fig. 7 )

Acanthococcus munroi Boratynski, 1962: 56 .

Eriococcus munroi (Boratynski) : Williams, 1985: 374; Miller & Gimpel, 2000: 275.

(Described from 4 specimens in fair to good condition, but details checked on remaining specimens).

Live appearance: not recorded.

Mounted material: quite small, total body length about 1.13–1.15 mm; antennae moderately long, slightly less than two­thirds total body length, with distinct fleshy setae (fs), each with an obviously blunt apex; body with few setae, all hair­like (hs), fs setae apparently absent or not differentiated from hs on body but present on all segments of legs; length of fs on antennae subequal to width of antennal segments; loculate pores (lp) absent but with 1–4 small pores on head, each slightly convex with a blunt fleshy protuberance; rather variable in size, mostly about 2.5µm wide but usually with a larger pore up to 7µm wide; often with 2–4 in a tight group. Wings about 0.9x total body length and about 0.41x as wide as long.

Head: roundly quadrangular; length about 155–165µm; width across genae about 180–200µm. Median crest (mc) absent; postoccipital ridge (por) distinct, each side with a long anterior and shorter posterior lateral extension; with (on each side) about 5–7 hs dorsal head setae (dhs) + 1–5 small pores mesad to each scape. Mid­cranial ridge: dorsal ridge (dmcr) narrow but distinct, extending almost to postoccipital ridge (por); ventral midcranial ridge (vmcr) long and narrow, extending from lateral arms (lmcr) posteriorly almost to preocular ridge (procr); without any reticulation laterally; with 2 or 3 hs ventral midcranial ridge setae (vmcrs) on each side. Genae (g) not reticulated; with 1–3 hs genal setae (gs) on each side just posterior to preoccipital ridge. Eyes: two pairs of round, simple eyes; dorsal eyes (dse) each approximately level to ventral simple eyes (vse); dorsal eyes rather smaller than ventral eyes, dorsal 25–30µm wide, ventral eyes each 30– 35µm wide. Ocelli (o) pronounced, situated laterally just anterior to postocular ridge (pocr), each 13–16µm wide. Ocular sclerite (ocs) lightly sclerotised around eyes, without reticulations (rarely some very faint ridges visible). Preocular ridge (procr) well developed ventrally, extending from antennae almost to ventral mid­cranial ridge; dorsally very short or absent. Postocular ridge (pocr) strongly developed, extending antero­laterally, ending posterior to inner margin of dse; interocular ridge (ior) absent. Dorsal ocular setae (docs) absent. Ventral head setae (vhs): with 1 or 2 pairs of hs ventral head setae (vhs) immediately posterior to ventral mid­cranial ridge. Tentorial bridge (tb) distinct. Cranial apophysis (ca) tripartite; 25–30µm long.

Antennae: 10 segmented and filiform; 675–700µm long (ratio of total body length to antennal length 1:0.60). Scape (scp) approximately square, with pedicel arising anteriorly: 35–50µm long and 48–50µm wide, with 2 hs ventrally and 2 dorsolaterally. Pedicel (pdc): length 65–70µm, width 38–42µm; with concentric ridges on distal end; with 7–13 fs, 7 or 8 hs + a campaniform pore. Segments III–X all rather irregular in width, each about 19– 28µm wide; lengths of segments (µm): III: 105–110; IV: 73–86; V: 75–80; VI: 68–75; VII: 68–76; VIII: 55–62; IX: 53–58; fs each about 21–28µm long; approximate number of setae per segment: III: 12–14 fs + 4–7 hs (2 quite long); IV: 12–15 fs + 4 or 5 hs (2 quite long); V: 12–15 + 5–7 hs (2 moderately long, occasionally capitate); VI: 9–12 fs + 2–5 hs (2 capitate setae (caps)); VII: 7–14 fs + 5 or 6 hs (2 caps); VIII: 6–9 fs, 2–6 hs (2 caps) + 1 bristle (abr) (near distal end); IX: 5–8 fs, 3–5 hs (2 caps) + 1 abr (near distal end). Segment X not constricted apically: length 43–50µm; with 3 caps, 1–4 fs, 1–4 hs + 5 abr; with 1 or 2 sensilla basiconica (sb) near apex.

Thorax. Prothorax: pronotal ridges (prnr) well developed and possibly touching dorsally; long, extending ventrally and nearly touching proepisternum + cervical sclerite (pepcv); pronotal sclerite (prn) represented by a small finger­like extension posterolaterally; without lateral pronotal setae (lpns), lateral prothoracic setae (lps), medial pronotal setae (mpns) and post­tergital setae (pts); post­tergite (pt) faint or absent. Pores absent. Sternum (stn1) lightly sclerotised; median ridge very thin or absent, transverse ridge well developed, perhaps with small apophyses; without prosternal setae (stn1s). Antemesospiracular setae (asp2s): 0–1 hs on each side; anteprosternal setae (astn1s) absent.

Mesothorax: prescutum (prsc) transversely oval, 60–70µm long, 120–128µm wide; sclerotised but not reticulated; prescutal ridge (pscr) well developed anteriorly but narrowing posteriorly; prescutal suture (pscs) distinct; with 1 or 2 hs prescutal seta (prscs) on each side. Scutum (sct): sclerotised but not reticulated, 29–33µm long; scutal setae (scts) 1–3 hs on each side; with a pair of small more or less oval membranous areas just anterior to scutellum; apodeme (praa) near prealare (pra) very small or absent; prealar ridge (prar) quite well developed. Scutellum (scl) 124µm wide and 50µm long; with a strong scutellar ridge (sclr) but no foramen; scutellar setae (scls): 2 hs on each side; postnotal wing process (pnp) strong and extending laterally. Basisternum (stn2) 185–215µm wide and 90–104µm long; without a median ridge (mdr); bounded anteriorly by a well­developed marginal ridge (mr) and posteriorly with a strong precoxal ridge (pcr2); without basisternal setae (stn2s); lateropleurite (lpl) broad, with a distinct extension from marginal ridge along anterior margin; lateropleurite without setae; furca (f) well developed, narrow­waisted, arms very divergent and extending to marginal ridge anteriorly. Mesopostnotum (pn2) well developed; postnotal apophysis (pna) well developed. Area bounded anteriorly by scutellum and laterally and posteriorly by mesopostnotum membranous. Mesepisternum (eps2) not reticulated; subepisternal ridge (ser) long and well developed. Postalare (pa) without reticulations; without postalare setae (pas). Mesothoracic spiracle (sp2): width of peritreme 23–27µm, without associated loculate pores. Postmesospiracular setae (pm2s) absent. Tegula (teg) present, each with 2 hs tegular setae (tegs).

Metathorax: with 2 or 3 hs metatergal setae (mts) on each side; metapostnotum (pn3) present as a transverse sclerite. Dorsospiracular setae (dss) absent. Dorsal part of metapleural ridge (plr3) present; suspensorial sclerites (ss) small. Posterior part of metapleural ridge well developed; episternum (eps3) sclerotised but without postmetaspiracular setae (eps3s); precoxal ridge (pcr3) well developed, extending medially about 65–75µm. Metepimeron (epm3) sclerotised. Antemetaspiracular setae (am3s) absent. Metathoracic spiracle (sp3): width of peritreme 23–25µm, without associated lp. Metasternum (stn3) membranous; metasternal apophysis (st3a) present; with 1 or 2 hs anterior metasternal setae (amss) and 1 or 2 pairs hs posterior metasternal setae (pmss).

Wings: hyaline, rather short, 975–1025µm long and 375–425µm wide (ratio of length to width 1:0.4; ratio of total body length to wing length 1:0.88); alar lobe (al) well developed; each wing with 1 or 2 hs alar setae (als) but circular sensoria (sens) absent. Hamulohalteres (h) narrow: 80–86µm long, 16–25µm wide; with a single apical hamulus (ham), 63–80µm long.

Legs: mesothoracic legs shortest, others subequal in length. Coxae (cx): I: 91; II: 90– 95; III: 95–97µm long; setae of coxa III: about 6 or 7 fs + 7–9 hs; long setae on each coxa not differentiated. Trochanter (tr) + femur (fm): I: 194–207; II: 175–186; III: 190–200µm long; trochanter III with about 0 or 1 fs + 5–7 hs; each trochanter with 3 roundly oval sensoria on each side arranged in a triangle medially; long trochanter seta 33–40µm long; femur III with about 7–11 fs + 10–12 hs. Tibia (ti): I: 195–202; II: 200–207; III: 215– 220µm; tibia III with a total of about 5–9 fs + 21–32 other setae, a few becoming spur­like on distal third of leg; with 2 apical spurs (tibs) on all tibia; length 16–23µm. Tarsi (ta) 2 segmented, proximal segment very short and ring­like, length of both segments combined: I: 85–92; II: 87–92; III: 95–100µm long (ratio of length of tibia III to length of tarsus III 1:0.45); tarsus III with 1 or 2 fs + 18–21 other setae, mainly spur­like; tarsal spurs (tabs) not differentiated; tarsal campaniform pore (tcp) present; tarsal digitules (tdt) shorter than claw, with small capitate apices. Claws (c) quite long and thin, about 1.5 times width of tarsus, almost straight, with a small denticle (cd); length: III: 26–28µm; claw digitules (cdt) longer than claw but with only minute capitate apices.

Abdomen: segments I–VII: small tergites (at) present on some segments near the anterior margin; sternites (as) unsclerotised. Caudal extension (ce) of segment VII absent. Dorsal abdominal setae (ads) (totals across segment): segment I–VII 4 hs. Pleural setae: dorsopleural setae (dps) on each side: I: 2 hs; II–VII: 3 hs; ventropleural setae (vps) (on each side): II–VII: 1 hs. Ventral abdominal setae (avs) (totals): II & III: 2 hs; IV–VII: 6 hs.

Segment VIII: tergite (at) and sternite (as) both sclerotised; tergite with 1 pair hs dorsal abdominal setae (ads) (each 16–25µm long); sternite with 4 hs ventral abdominal setae (avs); caudal extension (ce) rounded, with 3 short and 1 longer hs pleural setae (longest 28–33µm). Glandular pouches (gp) present, each shallow, with many loculate disc­pores; each with 2 glandular pouch setae (gls), each 85–120µm long; without additional setae.

Genital segment: penial sheath (ps) short, anterior part with more or less parallel sides; posterior part ending in a sharply pointed apex; dorsal surface sclerotised, with anal opening (an) medially, about 20–25µm wide. Length of penial sheath 128–140µm, greatest width 70–80µm; posterior part 86–91µm long and 48–52µm wide. Ventral lateral processes of penial sheath absent; ventral surface with 3 pairs of short setae, each about 20– 34µm long; posterior part with 1 pair of longer setae (each 25–28µm long) laterally and with two very long setae on dorsal surface, each about 45–65µm long. Basal rod (bra) short but distinct, probably lying more or less vertically, perhaps about 11–16µm long to top of aedeagus (aed) (including heavily sclerotised area which probably represents internal genital aperture (iga)). Aedeagus (aed) more or less parallel­sided, extending to end of penial sheath, 88–95µm long, curved, lying within penial sheath.

Material examined. GREENLAND: Sydgrønland, Kap Farvel­omradet, Pamiagdluk, Anordliūitsoq, from pitfall traps, 30.vii.1970, Jens Böcher: 1/2adΨΨ); Narsarsuaq, from pitfall trap, 15.viii.1991, Jens Böcher: 1/1adΨ; as previous, 1991: 3/3ΨΨ (+ 3Ψ of Trionymus bocheri ); as previous, 1991: 3/5adɗɗ + immɗ; Evighedsfjord, Kangiusseq, 19.vii.2003, Kissavik Exp.): 6/12ΨΨ; as previous but 21.vii.2003: 2/2ΨΨ; Fiskenaesfjorden, on Hieracium rigorosum , 3.vii.2003, Kissavik Exp.: 4/4adΨΨ, 1adɗ + 4immɗɗ ( ZMUC; BMNH; USNM).

Comment. Because the males were collected at the same time as some adult females, the identity of these males is highly probable. For a comparison with the males of E. pseudinsignis , see under that species.

Figures

FIGURE 7. Adult male of Eriococcus munroi (Boratynski). Where A = cranial apophysis; D = dorsal pores on head; E = fleshy seta; F = hair­like seta; J = apical antennal segment; K = lateroventral view of genital segment; L = tarsus + claw, and M = campaniform pore on trochanter. And where an = anus; cd = claw denticle; cdt = claw digitules; fs = fleshy setae; hs = hair­like setae; por = postoccipital ridge; sclr = scutellar ridge, and tibs = large spur­like setae on tibia.