Phenacoccus desertus Bazarov & Nurmamatov, comb. nov.
Creators: name: Kaydan, Bora
Publisher: name: Zenodo
Year: 2011
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Pseudococcidae
Phenacoccus
Phenacoccus desertus

description: Phenacoccus desertus (Bazarov & Nurmamatov), comb. nov.
Heterococcopsis desertus Bazarov & Nurmamatov, 1975: 63.
Material examined. Holotype adult female: Tadzhikistan, Gbao, Vosim, Gasur Lurgap, Org. Artemisia demissa (Asteraceae), L. Kuarzivsheva, 18.vii.1924 (ZIAS).
Adult female (Fig. 5)
Live appearance. Body oval.
Mounted material. Body oval, 2.20 mm long, 1.34 mm wide. Eye marginal, 35.0 µm wide. Antenna 9 segmented, 130–140 µm long; apical segment 47.5 µm long, 20 µm wide, with apical setae 22.5 µm long, plus 3 fleshy setae, each 20–30 µm long. Clypeolabral shield 145 µm long, 120 µm wide. Labium 110 µm long, 75 µm wide. Anterior spiracles 45 µm long, 15 µm wide across atrium; posterior spiracles 45.0–47.5 µm long, 25.0–27.5 µm wide across atrium. Legs well developed; coxa 40 µm long, hind trochanter + femur 150 µm long, hind tibia + tarsus 165 µm long, hind claw 25.0 µm long. Ratio of lengths of hind tibia + tarsus to hind trochanter + femur 1.10, ratio of lengths of hind tibia to tarsus 1.3:1, ratio of length of hind trochanter + femur to greatest width of femur 3.3:1. Tarsal digitules setose, each 10 µm long. Claw digitules subequal, each 17.5 µm long, knobbed and broader than tarsal digitules. Translucent pores present on femur and tibia of hind legs, totalling 16–24. Both pairs of ostioles present, posterior ostioles each with 9 trilocular pores and 1 setae, anterior ostioles each with 4 trilocular pores and 2 or 3 setae. Anal ring 55 µm wide, with 6 anal-ring setae, each 60–65 µm long.
Dorsum. Cerarii numbering 2 pairs, with pairs on posterior 2 abdominal segments; anal lobe cerarii each with 2 conical setae (broken, as shown on figure), plus 5–7 trilocular pores; C17 each with 2 conical setae, each 10 µm long, plus 2 trilocular pores. Dorsal body setae spine-like, each 5–10 µm long. Multilocular pores each 7.5–9.0 µm wide with 11 loculi, present in laterally in abdominal segment I and in rows or bands on posterior abdominal segments (II–VII): 12 pores on segment on II, 19 on III, 37 on IV, 37 on V, 24 on VI, 30 on VII and no pores on segment VIII. Quinquelocular pores very few (only three pores seen on head and thorax), each 5–6 µm. Trilocular pores each 4–5 µm in diameter, scattered throughout. Oral-collar tubular ducts each 7.5–10.0 µm long, 2–3 µm wide, present in rows on all abdominal segments plus 8 on head and thorax laterally; distributed on abdomen as follows: 3 on I; 5 on II; 6 on III; 6 on IV; 7 on V; 2 on VI; 3 on VII; 4 on VIII in row.
Venter. Body setae slender, each 12.5–40.0 µm long, longest setae medially on head; apical setae of anal lobe broken. Multilocular disc pores present, each 7.5–8.0 µm in diameter, present laterally on abdominal segments I–II and in rows or bands on posterior abdominal segments (III–VIII + IX): 22 pores on segment III, 34 on IV, 36 on V, 48 on VI, 37 on VII, and 27 on VIII + IX. Quinquelocular pores each 5–6 µm wide, scattered throughout. Oral-collar tubular ducts each 7.5–9.0 µm long, 2.5–3.0 µm wide, present in rows on all abdominal segments plus a few on head and thorax; distributed as follows: 1–2 on each side of abdominal segments I–III; 13 on IV; 14 on V; 8 on VI in row or band and 3 on VII; 3 on VIII laterally.
Comment. Species in the Heterococcus -group differ from those in Phenacoccus Cockerell in having: (i) quinquelocular pores on the dorsum and either no trilocular pores or trilocular pores restricted to around each spiracle. Because Heterococcopsis desertus lacks both of these character states, it is not congeneric with Heterococcopsis lonicerae Borchsenius, the type species of the genus Heterococcopsis but does appear to be congeneric with Phenacoccus aceris Signoret, the type species of the genus Phenacoccus. H. desertus shares the following important features with P. aceris: (i) presence of many trilocular pores on dorsum and venter, (ii) very few quinquelocular pores (only 3 were found) on dorsum, and (iii) a long labium. Based on the morphological affinities of H. desertus with P. aceris, I here transfer H. desertus to Phenacoccus, as Phenacoccus desertus (Bazarov & Nurmamatov) comb. nov. and illustrate the species based on the type material.
This species is very close to Phenacoccus tergrigorianae Borchsenius & Ter-Grigorian, and P. p u m i l u s Kiritshenko in having multilocular pores on dorsum, but differs from both in having many quinquelocular pores on the venter. The genus Phenacoccus has many species and needs further study to clarify the status of the new combination of P. desertus.
description: Published as part of Kaydan, Bora, 2011, Revision of Heterococcopsis Borchsenius (Hemiptera: Coccoidea: Pseudococcidae), with description of a new genus with two new species from Turkey, pp. 49-62 in Zootaxa 2970 on pages 60-62, DOI: 10.5281/zenodo.203960