Dysmicoccus zagrosicus, Moghaddam, 2018

Moghaddam, Masumeh, 2018, Three new mealybug species (Hemiptera: Coccomorpha: Pseudococcidae) from Iran, Zootaxa 4420 (2), pp. 180-188 : 183-185

Dysmicoccus zagrosicus sp. n.

( Fig. 2 )

Material examined. Holotype, adult female: IRAN, left label: 2937/ Lorestan province/ Khorramabad, Rabat -e Namaki/ Rimaleh/ 28.v.2017 / Alt. 2437 m / N33˚38′59.6″/ E48˚27′24.1″; right label: Holotype/ Dysmicoccus zagrosicus sp. n. / on Lactuca sp. ( Asteraceae )/ coll. M. Moghaddam (HMIM). Paratypes: IRAN, 3 adult females mounted singly on slides, each with same left label as holotype slide; right label: Paratype/ Dysmicoccus zagrosicus sp. n. (HMIM).

Slide-mounted adult female ( Fig. 2 ). Body oval to broadly oval, 1.36–1.74 mm long, 0.68–0.88 mm wide; anal lobes developed in young female. Eye situated on margin, 22–36 µm wide. Antennae each 8 segmented, 240– 400 µm long; apical segment 72–80 µm long. Circulus absent. Legs well developed; measurements for posterior legs: trochanter + femur 160–280 µm long, tibia + tarsus 192–352 µm long, claw 22–26 µm. Ratio of lengths of tibia + tarsus to trochanter + femur 1.20–1.22:1; ratio of lengths of tibia to tarsus 1.58–1.42:1; ratio of lengths of hind trochanter + femur to greatest width of femur 3.63–4.80:1. Tarsal digitules not knobbed, claw digitules knobbed and longer than claw. Hind femur and tibia with a few inconspicuous translucent pores. Anterior and posterior ostioles with inner edges of lips moderately sclerotized, each lip with 1 or 2 setae and a few trilocular pores. Anal ring 48–60 µm wide, with 2 rows of pores and bearing 6 setae, each seta about 84 µm long. Cerarii numbering 7 pairs, all situated on abdominal segments; anal lobe cerarii each with 2 enlarged conical setae, each about 10–16 µm long, about 6 auxiliary setae, and 12–18 trilocular pores, all situated on a sclerotized area smaller than anal ring. Penultimate cerarii lightly sclerotized, each with 2 conical setae shorter than those in anal lobe cerarii, about 5 auxiliary setae, and 4 or 5 trilocular pores. Anterior cerarii not sclerotized, each with 2 conical setae, 0–4 auxiliary setae, and 4 or 5 trilocular pores. Cerarii absent from thoracic segments and head.

Dorsum with slender flagellate setae, mostly each 10–24 µm long. Oral collar tubular ducts of 2 sizes: large type each about 6 µm long and 3 µm wide; small type each about 4 µm long and 2 µm wide. Most ducts present in groups, usually with 2 large and 1 small type together, forming a group of 3; large type also present singly between duct groups. Trilocular pores, each about 2.5 µm in diameter, scattered over entire body. Minute discoidal pores scattered throughout.

Venter with setae normal and flagellate, each 10–140 µm long. Apical seta on each anal lobes each 72–110 µm long. Multilocular disc pores present in single to double rows at posterior edges of segments VI and VII, at anterior edge of segment VIII, and also on segment IX; and present in submarginal areas of segments III–V. Trilocular pores same size as on dorsum, scattered throughout. Minute discoidal pores scattered throughout. Oral collar tubular ducts of same 2 sizes as on dorsum; small type present in rows across abdominal segments, sparsely present in median areas of head and thorax, present also as groups of 3 on margin of head, thorax and abdominal segments; also as groups on medial areas of body, each group consisting of 1 large type and 1 small type duct.

Comments. Dysmicoccus zagrosicus sp. n. resembles D. triadus Williams in possessing groups of ducts on the dorsum and the venter; but D. zagrosicus differs as follows (character-states of D. triadus in brackets): (i) cerarii numbering 7 pairs, situated on abdominal segments (cerarii numbering 17 pairs); multilocular disc pores present on submargins of segments IV and V, absent from medial areas of these segments (present only on medial areas of segments VI and VII).

Dysmicoccus zagrosicus sp. n. also comes closest to D. caspianensis sp. n. in containing: (i) groups of ducts on the dorsum and the venter, (ii) cerarii numbering 7 pairs, situated on the abdominal segments, (iii) transclucent pores absent on the hind coxa; but D. zagrosicus differs as follows (character-states of D. caspianensis in brackets): (i) multilocular disc pores present on submargins of segments IV and V (absent), (ii) multilocular disc pore absent at behind of anterior coxa (present).

Etymology. The species epithet is an adjective formed by combination of the locality ‘Zagros’ (the Zagros Mountains are the largest mountain range in Iran) with the Latin suffix ‘- icus ’, meaning ‘belonging to’.

Figures

FIGURE 2. Adult female of Dysmicoccus zagrosicus Moghaddam sp. n.