Pelionella grassiana (Goux) Goux, 2015

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 : 230

Pelionella grassiana (Goux) , comb. nov.

( Fig. 11 )

Peliococcus grassianus Goux, 1989: 306

Pelionella grassiana ; Danzig & Gavrilov-Zimin 2014: 454. Unavailable name.

Material studied. Holotype. 1 adult female: France (Alpes Maritimes, Grasse) on an undetermined species of Lamiaceae , 13.viii.1931, coll. L. Goux ( MNHN: 14757).

Description. Adult female. Body elongate oval, 1.54 mm long, 0.84 mm wide. Eyes marginal, 42.5–45.0 µm wide. Antenna 9 segmented, 300 µm long; apical segment 47–50 µm long, 20–25 µm wide; apical setae 35 µm long, plus 3 fleshy setae each 22–30 µm long. Tentorium 145 µm long, 145 µm wide. Labium 130 µm long, 85 µm wide. Anterior spiracles 50–55 µm long, 25–30 µm wide across atrium; posterior spiracles 65 µm long, 35 µm wide. Circulus absent. Legs well developed; posterior legs: coxa 125–130 µm long; trochanter + femur 175–180 µm long; tibia + tarsus 210 µm long; tibia with around 15 translucent pores, claw 20 µm long. Ratio of lengths of hind tibia + tarsus to trochanter + femur 1.2:1; ratio of lengths of tibia to tarsus 2.07:1; ratio of length of trochanter + femur to greatest width of femur 3.0:1. Tarsal digitules hair-like, each 20 µm long. Claw digitules knobbed, each 20 µm long. Anterior ostioles with a total for both lips of 10 or 11 trilocular pores and 4 setae; posterior ostioles with a total for both lips of 16–18 trilocular pores and 5–7 setae. Anal ring 90 µm wide, with 6 setae, each seta 105–110 µm long. Cerarii numbering 18 marginal pairs, each slightly sclerotized; anal lobe cerarii each with 2 slender enlarged setae, 15 µm long, 1 or 2 spine-like auxiliary setae and 10–12 trilocular pores; other marginal cerarii each with 2 slender enlarged setae and several trilocular pores. Dorsal cerarii absent.

Dorsum. Setae spine-like, each 7.5–10.0 µm long, in segmental lines. Clusters with 1 or 2 (usually 1) multilocular disc pores, each pore 7.5–8.0 µm in diameter; each cluster with a small oral collar tubular duct in centre, 7.5 µm long, 2.5–3.0 µm wide, plus 2 large oral collar tubular ducts, each 7.5 µm long, 4.0–5.0 µm wide, and 1–3 minute discoidal pores, each 2 µm in diameter; with a total of 39 clusters on head and thorax; and also on abdominal segments as follows: I 10, II 12, III 11, IV 10, V 10, VI 7, VII 8, VIII+IX 0. Trilocular pores, each 3–5 µm in diameter, scattered throughout. Minute discoidal pores, each 2 µm in diameter, mainly restricted to within clusters.

Venter. Setae of 2 types: (i) hair-like setae, each 15–60 µm long; longest setae medially on head; and (ii) spinelike setae, each 7.5–8.0 µm long, in submarginal rows. Apical setae of anal lobes both broken. Multilocular disc pores of 2 kinds: (i) those with a single ring of loculi, each 7.5–8.0 µm in diameter, present in bands on abdominal segments as follows: VI 20, VII 41, VIII + IX 22; and (ii) pores with 2 rings of loculi as on dorsum, present in clusters in submarginal area. Quinquelocular pores, each 5.0–6.0 µm in diameter, scattered medially on head, thorax and first 6 abdominal segments. Trilocular pores, each 2–3 µm in diameter, scattered throughout. Minute discoidal pores, each 2 µm in diameter, few. Oral collar tubular ducts of 3 sizes: largest and smallest ducts in clusters as described for dorsum, restricted to within clusters; medium-sized ducts, each 9–10 µm long, 3.0–4.0 µm wide, concentrated on body margin and in rows on abdominal segments as follows: V 48, VI 46, VII 28, VIII + IX 20.

Comments. In lacking a circulus, P. grassiana is similar to P. proeminens and P. sabl ia. P. grassiana differs from P. proeminens in having: (i) clusters on dorsum in distinct rows on each segment, and (ii) each hind femur without translucent pores ( P. proeminens has clusters on dorsum sparsely distributed on each segment; and each hind femur has translucent pores). P. grassiana differs from P. sablia in having 14–17 pairs of marginal cerarii whereas P. s ab l i a has fewer than 4 pairs.

Danzig & Gavrilov-Zimin (2014) used the combination " Pelionella grassiana " before the genus name was made available in the present work. Refer to Comments under the genus Pelionella above for further information. Danzig & Gavrilov-Zimin (2014) listed “ Pelionella grassiana ” citing “Kaydan 2014?” without suggesting that this was a new combination. Here the new combination is made available in a manner that satisfies the requirements on the Code (ICZN, 1999). Danzig & Gavrilov-Zimin (2014) also reproduced Fig. 11 with minor modification (the illustration of multilocular disc pores) as their figure 2.1.3-26.

Host plants. On an undetermined species of Lamiaceae .

Distribution. France (Alpes Maritimes, Grasse).

Figures

FIGURE 11. Pelionella grassiana (Goux), holotype. Note: circulus absent; clusters on dorsum in distinct rows on each segment; hind femur without translucent pores.