Pelionella stellarocheae (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 : 244-246

Pelionella stellarocheae (Goux) , comb. nov.

( Fig. 18 )

Peliococcus stellarocheae Goux, 1990: 80 .

Pelionella stellarocheae (Borchsenius) ; Danzig & Gavrilov-Zimin 2014: 465. Unavailable name.

Material studied. Paratypes: 3 adult females: France, Rhône, Bessenay, on Mentha sp. ( Lamiaceae ), 19.ix.1928, coll: L. Goux ( MNHN: 14764-4, 5, 6).

Description. Adult female. Body elongate oval, 1.56–1.75 mm long, 1.02–1.15 mm wide. Eyes marginal, 37.5–47.5 µm wide. Antenna 9 segmented, 310–350 µm long; apical segment 47.5–55.0 µm long, 20–25 µm wide; apical setae 25–35 µm long plus 3 fleshy setae, each 22.5–35.0 µm long. Tentorium 170 µm long, 145 µm wide. Labium 140 µm long, 85 µm wide. Anterior spiracles 45 µm long, 32.5 µm wide across atrium; posterior spiracles 55 µm long, 35 µm wide. Legs well developed; posterior legs: trochanter + femur 195–210 µm long; tibia + tarsus 220–235 µm long; claw 22.5–27.5 µm long. Ratio of lengths of tibia + tarsus to trochanter + femur 1.11–1.20:1; ratio of lengths of tibia to tarsus 2.21–2.35:1; ratio of length of trochanter + femur to greatest width of femur 3.12–3.72:1. Tarsal digitules hair-like, each 20 µm long. Claw digitules knobbed, each 20 µm long. Anterior ostioles with a total for both lips of 12–14 trilocular pores and 3–5 setae; posterior ostioles with a total for both lips of 20–29 trilocular pores and 4 or 5 setae. Anal ring 70–75 µm wide, with 6 setae, each seta 85–115 µm long. Cerarii slightly sclerotized, numbering 13 marginal pairs; anal lobe cerarii each with 2 slender enlarged setae, 15.0–17.5 µm long, 2 or 3 spine-like auxiliary setae and 9–13 trilocular pores; other marginal cerarii each with 2 slender enlarged setae and a few trilocular pores; only 1 dorsal cerarius present, medially abdominal segment VII.

Dorsum. Setae spine-like, each 5–10 µm long. Clusters each with 0–6 (usually 2 or 3) multilocular disc pores, each pore 7–9 µm in diameter with 2 rings of 11 loculi, a small oral collar tubular duct, 9–10 µm long, 2.0–3.0 µm wide, and 0–3 large (usually 2) oral collar tubular ducts, each 7.5–9.0 µm long, 4–5 µm wide, and 0–2 minute discoidal pores, each 2.0–2.5 µm in diameter; clusters on thorax and head totalling 62–67; clusters also on abdominal segments as follows: I-V 10–12 for each segment, VI 7, VII 8 or 9, VIII 0. Trilocular pores, each 3–4 µm in diameter, scattered throughout. Minute discoidal pores mainly restricted to within clusters.

Venter. Setae of 2 types: (i) relatively short, slender hair-like setae, each 15–50 µm long; longest medially on head; and (ii) spine-like setae, each 5.0–7.5 µm long, in submarginal rows. Apical setae of anal lobes 135–145 µm long. Multilocular disc pores of 2 kinds: (i) pores, each 7–9 µm in diameter with a single ring of loculi, present in single rows on abdominal segments as follows: V 2–4, VI 34 –36, VII 58 –61, VIII + IX 22–29; and (ii) pores, each 6.0–7.5 µm in diameter with 2 rings of loculi, in clusters similar to those on dorsum; each cluster with 1–3 (usually 2) multilocular disc pores, a single small oral collar tubular duct, 9–10 µm long, 2–3 µm wide in centre, and 2–3 large oral collar tubular duct, each 7.5–9 µm long, 4–5 µm wide, among disc pores, plus 0–2 minute discoidal pores, each 2.0–2.5 µm in diameter; clusters present submarginally on most abdominal segments and medially on abdominal segments III and IV. Quinquelocular pores, each 5–6 µm in diameter, present medially on head, thorax and abdominal segments I–VI. Trilocular pores, each 3–4 µm in diameter, scattered throughout except medially. Minute discoidal pores, each 2 µm in diameter, few. Oral collar tubular ducts of 3 sizes: largest and smallest ducts in clusters as on dorsum; medium-sized ducts, each 10–11 µm long, 3–4 µm wide, present on body margins and in single rows on abdominal segments as follows: V 32 –42, VI 35 –45, VII 32 or 33, VIII + IX 25–27.

Comments. P. stellarocheae differs from all other species in the genus in having a reduced number of marginal cerarii. Cerarii are present on head and abdomen but are reduced or absent on the pro- and mesothorax.

Danzig & Gavrilov-Zimin (2014) used the name " Pelionella stellarocheae " 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 stellarocheae ” 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. 18 with minor (the illustration of multilocular disc pores) modification as their figure 2.1.3-31.

Host plants. On Mentha sp. ( Lamiaceae ).

Distribution. France (Rhône, Bessenay).

Figures

FIGURE 18. Pelionella stellarocheae (Goux), paratype. Note: clusters of multilocular disc pores abundant throughout dorsum, each cluster with 1 – 3 multilocular disc pores and 1 – 3 large and a central small oral collar tubular ducts; and marginal cerarii absent on some thoracic segments.