Pseudococcus saccharicola

Caballero, Alejandro, Potapov, Anton, Rueda-Ramírez, Diana & Scheu, Stefan, 2022, Five new records of soil scale insects (Hemiptera: Coccomorpha) for Indonesia, Soil Organisms 94 (2), pp. 85-98 : 87-89

Pseudococcus saccharicola

( Takahashi, 1928)

( Pseudococcidae ) ( Fig. 1 )

Intraspecific variation of 4 adult females, added to information provided by Takahashi (1928), Williams (1970, 2004), and Granara de Willink & González (2018) in square brackets. Antenna with eight segments, 427– 469 µm long [335–360 µm long] ( Fig. 1A ), S ant I 67–74 µm, S ant II 65–76 µm, S ant III 40–52 µm, S ant IV 33–41 µm, S ant V 44–56 µm, S ant VI 30–37 µm, S ant VII 43–47 µm, S ant VIII 100–102 µm. Eyespots 32–35 µm basal diameter without associated pores ( Fig. 1B ). Labium 112 µm [90–95 µm long]. Foreleg 135–141 µm long: trochanter + femur 296–333 µm, femur 232–268 µm, tibia + tarsus 297–352 µm, tibia 190–242 µm, tarsus 107–110 µm, claw 28–33 µm. Midleg 641–642 µm long: trochanter + femur 299–305 µm, femur 236–244 µm, tibia + tarsus 311–312 µm, tibia 190–242 µm, tarsus 107–110 µm, claw 28–33 µm. Hind leg 600–737 µm long: trochanter + femur 287–338 µm [265–300 µm], femur 233–273 µm, tibia + tarsus 284–365 µm [310–325 µm], hind tibia 184–249 µm, hind tarsus 100–116 µm, claw 29–34 µm; translucent pores in coxae 98–129 [few pores, as few as 1 or 2, according to Williams (2004); numerous pores over the half or whole surface according to Takahashi (1928) and Williams (1970)] ( Fig. 1C , cx) and tibia 13–25 [few pores present on outer edge] ( Fig. 1C , tb). Circulus absent on all analysed specimens [present or absent]. Obanal setae 49–54 µm long, cisanal setae 65–87 µm long. Anal lobe setae 190–194 µm long.

Cerarii numbering 16 pairs, C 9, C 10, or C 15 reduced to one slightly conical seta and C 16 absent. Anal ring 75–80 µm transversal diameter with six anal ring setae 96–116 µm long [6 setae about twice length of diameter of ring]. Multilocular disc pores 8–9 µm diameter [7.5 µm] numbering 133–156, restricted to venter, distributed as follows: absent on head, 5–10 on thorax, absent on S abd I and S abd II, S abd III 7–12, S abd IV 24–27, S abd V 5–14, S abd VI 17–20, S abd VII 34–49, S abd VIII+IX 32–33. Oral collar tubular ducts restricted to venter, of two sizes: the smallest ones of 2–3 µm in diameter and 6–7 µm long, usually present in mid region along the abdominal segments, the largest ones 3–5 µm in diameter and 7–9 µm long. Ventral oral rim tubular ducts 7–8 µm at widest diameter and 9 µm long ( Fig. 1D ), numbering 3–5, 0–1 at level of C 12, 2 in S abd I, and 1–2 in S abd II. Dorsal oral rim tubular ducts 7–9 µm at widest diameter and 9–12 µm long, numbering 14–17, distributed as follows: 1 posterior to anterior ostiole, 0–1 associated to C 14, C 13, and C 11, C 10, 1 in S abd I, 0–2 in S abd II, 2 in S abd IV, 3–4 in S abd V, 1–5 in S abd VI and 1–3 in S abd VII.

Material studied. INDONESIA, Province Jambi, 14 m a.s.l., 01°42’39.6’’S 103°17’23.3’’E, ex soil of Rubber land-use system (Plot ID HRr4), 2016, 2 ♀♀ adults; Province Jambi, 56 m a.s.l., 02°04’36.1’’S 102°46’22.3’’E, ex soil of Rubber land-use system (Plot ID BR4 ), 2016, 2 ♀♀ adults .

Rhizoecus pignerator Williams, 2004 ( Rhizoecidae ) ( Fig. 2 )

Intraspecific variation of 4 adult females, added to information provided by Williams (2004), and Kozár & Konczné Benedicty (2007) in square brackets. Antennae 61–98 µm long [100–105 µm], with six segments with length and chaetotaxy as follow ( Fig. 2A , an, Fig. 8A ), S ant I 17–24 µm and 4 flagellate setae, S ant II 11–16 µm with 3 flagellate setae and 1 sensillum, S ant III 12–17 µm and 7 flagellate setae, S ant IV 7–10 µm and 5–6 flagellate setae, S ant V 6–14 µm 5 flagellate setae and 1 falcate seta [one elongate slender sensory seta], S ant VI 23–26 µm with 19–20 flagellated setae and 4 falcate setae [three stout, falcate sensory seta]. Eyespot 7–9 µm in diameter ( Fig. 2A , ey). Labium 50 µm long. Hind tibia + tarsus 83 µm [75 µm], hind femur 57 µm, hind tibia 52 µm, hind tarsus 35 µm, claw 18 µm with short setose digitules ( Fig. 2B ). Ratio of lengths of hind tibia to tarsus 1.4 [rate 1.1]. Circuli numbering 3–4 on S abd II or S abd III to S abd V ( Fig. 2C ), one on each segment [three circuli with 1–3 spherical protuberances]. Circulus in S abd II with 7 µm at the base, and two globular protuberances; in S abd III with 10 µm at the base, with four globular protuberances; in S abd IV with 10 µm at the base, and four globular protuberances; in S abd V with 12 µm at the base and two globular protuberances. Genital chamber 74 µm long ( Fig. 2D ). Anal ring with spicules in the external row of cells. Anal lobe setae, the thickest one 35 µm long with knobbed apex [20–28 µm long], the thinnest setae 30 µm long [40 µm long].

Multilocular disc pores with 8–10 loculi, restricted to venter of abdomen as follow: 0–3 on S abd VI, 2–4 in S abd VII and 3–4 on S abd VIII; total number 5–11 [9–11, around vulva]. Tubular ducts scattered on venter of thorax and abdomen ( Fig. 2E ). Tritubular ducts 116–130 in whole body ( Fig. 2F ), in dorsum numbering 68–78, distributed as follows: 5–6 on head, 27–29 in thorax, on abdomen: 7–9 in S abd I, 6–7 on S abd II, 7 on S abd III, 6–7 on S abd IV, 7 on S abd V, 2–3 on S abd VI, 3 on S abd VII, 2 on S abd VIII. Ventral tritubular ducts numbering 46–53. distributed as follows: 3–5 on head, 15–18 on thorax, 2–4 on S abd I, 3 on S abd II, 6 on S abd III, 4–7 on S abd IV, 5–6 on S abd V, 4–5 on S abd VI, 2 on S abd VII, absent on S abd VIII.

Material studied. INDONESIA, Province Jambi, 81 m a.s.l., 02°09’29.4’’S 103°20’01.5’’E, ex litter of forest land-use system (Plot ID HF2 ), 2016, 2♀♀ adults; Province Jambi, 51 m a.s.l., 02°10’30.1’’S 103°19’57.8’’E, ex soil of forest land-use system (Plot ID HF3 ), 2016, 1♀ adult; Province Jambi, 61 m a.s.l., 02°11’15.2’’S 103°20’33.4’’E, ex litter of forest land-use system (Plot ID HF4 ), 2016, 1♀ adult .

Other species studied: Geococcus coffeae was found in this study. The 11 studied specimens agree well with the species descriptions by Williams (1958, 1969) and Kozár & Konczné Benedicty (2007).

Material studied. INDONESIA, Province Jambi, 65 m a.s.l., 02°04’32.0’’S 102°47’30.7’’E, ex soil of oil palm land-use system (Plot ID BO2 ), 2016, 3♀♀ adults; Province Jambi, 52 m a.s.l., 02°04’15.2’’S 102°47’30.6’’E, ex soil of oil palm land-use system (Plot ID BO3 ), 2016, 1♀ adult; Province Jambi, 61 m a.s.l., 02°11’15.2’’S 103°20’33.4’’E, ex litter of forest land-use system (Plot ID HF4 ), 2016, 1♀ adult; Province Jambi, 63 m a.s.l., 01°53’00.7’’S 103°16’03.6’’E, ex soil of oil palm land-use system (Plot ID HO2 ), 2016, 3♀♀ adults; Province Jambi, 58 m a.s.l., 01°51’28.4’’S 103°18’27.4’’E, ex soil and litter of oil palm land-use system (Plot ID HO3 ), 2016, 4♀♀ adults .

Figures

Figure 1. Microphotographs of Pseudococcus saccharicola (Takahashi, 1928): (A) Eight-segmented antenna. (B) Eyespot without pores associated. (C) Hind leg with translucid pores in coxa (cx) and tibia (tb). (D) section of dorsal marginal area in abdominal segment I with oral rim tubular duct (or) near to cerarious (ce).

Figure 2. Microphotographs of Rhizoecus pignerator Williams, 2004: (A) Ventral section of head with six-segmented antennae (an) and eyespot (ey) full developed.(B) Claw (cl) with ungual digitule setose (dig). (C) Venter of central area of abdominal segments II to IV, each with one circulus. (D) Genital chamber covering the abdominal segments V to VII. (E) Ventral section of abdomen with oral collar tubular ducts (doted–line box). (F) Ventral section of abdomen with ampliation of tritubular ducts.

Figure 8. Taxonomic illustrations of antennae of (A) Rhizoecus pignerator (Williams, 2004), (B) Rhizoecus omphalius Williams, 2004 and (C) Ripersiella cryphia (Williams, 2004).