Peliococcus courzius Goux

Kaydan, Mehmet Bora, 2015, A systematic study of Peliococcus Borchsenius (Hemiptera: Coccoidea: Pseudococcidae), with descriptions of a new Palaearctic genus and four new species from Turkey, Zootaxa 3920 (2), pp. 201-248 : 216-218

Peliococcus courzius Goux

( Fig. 5 )

Peliococcus courzius Goux, 1989: 304 ; Danzig & Gavrilov-Zimin 2014: 414

Material studied. Paratypes: 3 adult females: France, Bouches-du-Rhône, Courzieu, on Thymus serpyllum , 31.vii.1928, coll. Malval and L. Goux ( MNHN: 14756- 2, 3, 10).

Description. Adult female. Body elongate oval, 1.92–2.58 mm long, 1.28–1.58 mm wide. Eye marginal, 40–45 µm wide. Antennae 9 segmented, 370–380 µm long; apical segment 55–60 µm long, 25–30 µm wide; apical setae ca 35 µm long plus 3 fleshy setae each 25–35 µm long. Tentorium 155–170 µm long, 145–170 µm wide. Labium 155–185 µm long, 95–110 µm wide. Anterior spiracles 45–60 µm long, 35–45 µm wide across atrium; posterior spiracles 62–80 µm long, 40–45 µm wide across atrium. Legs well developed; posterior legs: coxa 140–170 µm long; trochanter + femur 195–240 µm; hind tibia + tarsus 220–260 µm, claw 22–28 µm. Ratio of lengths of tibia + tarsus to trochanter + femur 1.08–1.17:1; ratio of lengths of tibia to tarsus 2.20–2.67:1; ratio of length of trochanter + femur to greatest width of femur 3.3–3.7:1. Tarsal digitules, each ca 10 µm long (most broken), hair-like. Claw digitules knobbed, each 20–25 µm long. Anterior ostioles with a total for both lips of 18–26 trilocular pores and 4–6 setae; posterior ostioles with a total for both lips of 28–31 trilocular pores and 5–8 setae. Anal ring 70–88 µm wide, with 6 setae, each seta 105–110 µm long. Cerarii slightly sclerotized, numbering 17 marginal pairs; C3 with 3 enlarged setae, each 15–18 µm long, plus 3 or 4 trilocular pores; anal lobe cerarii each with 2 enlarged setae, each 17–23 µm long, plus 8–10 trilocular pores and 3 or 4 spine-like auxiliary setae; other marginal cerarii each with 2 enlarged setae and 1 or 2 trilocular pores.

Dorsum. Setae spine-like, each 5–15 µm long, not on an elevated area but with trilocular pores at base of larger setae. Clusters, each with 2 or 3 (mainly 3) multilocular disc pores, each 7.5–10.0 µm in diameter, and a single small oral collar tubular duct (each 8–10 µm long, 2.5–3.0 µm wide) in centre, plus 1–3 large oral collar tubular ducts (each 9–10 µm long, 5–6 µm wide) situated among multilocular disc pores; 0 or 1 minute discoidal pores, each 2.5 µm in diameter, also present in clusters (plus a few scattered elsewhere); clusters present on head and thorax and also on abdominal segments as follows: I 8 or 9, II 9, III 9, IV 9 or 10, V 10–13, VI 5 or 6, VII 7–10, VIII + IX 0. Trilocular pores each 4–6 µm in diameter, scattered throughout.

Venter. Setae of 2 types: (i) slender hair-like setae, each 15–85 µm long, longest setae medially on head; (ii) spine-like setae each 10.0–12.5 µm long, present in 2 or 3 submarginal rows. Apical setae on anal lobes broken. Multilocular disc pores, similar to those on dorsum, present in clusters on abdominal segments III and IV (8–10 clusters in total); and also submarginally and marginally, each cluster usually with 1 or 2 multilocular disc pores, a small oral collar tubular duct in centre and a larger oral collar tubular duct among multilocular disc pores; multilocular disc pores also present in rows on abdominal segments as follows: II 0, III 0–3, IV 7–9, V 5, VI 20–23, VII 36 –43, VIII + IX 19–26. Quinquelocular pores, each 6.0–7.5 µm in diameter, scattered in middle area of head, thorax and first 5 abdominal segments. Trilocular pores, each 3–4 µm in diameter, present only submarginally and marginally. Minute discoidal pores few, each 2 µm in diameter, scattered. Oral collar tubular ducts tending to be concentrated on body margin and in single rows across abdominal segments, of 3 sizes: a small tubular duct, each 8–10 µm long, 2.5–3.0 µm wide, present in centre of each cluster, along with 1–3 larger oral collar tubular ducts, each 9–10 µm long, 5–6 µm wide, situated among multilocular disc pores, as described above on dorsum; also a medium-sized duct, each 7.5–12.5 µm long, 3–5 µm wide, present on abdominal segments as follows: II 1, III 4–7, IV 16–18, V 25–34, VI 33 – 35, VII 19–28, VIII+ IX 17–21.

Comments. Peliococcus courzius differs from all other Peliococcus species in having the following combination of features: (i) 2 sizes of oral collar tubular ducts on the dorsum, (ii) no circulus, and (iii) quinquelocular pores throughout venter.

Danzig & Gavrilov-Zimin (2014) used Fig. 5 as their figure 2.1.3-9.

Host plants. On Thymus serpyllum (Lamiaceae) .

Distribution. France (Rhone, Courzieu).

Figures

FIGURE 5. Peliococcus courzius Goux, paratype. Note: 2 sizes of oral collar tubular ducts on dorsum, absence of a circulus, and presence of quinquelocular pores throughout venter.