Eulecanium rugulosum (Archangelskaya)

Moghaddam, Masumeh & Watson, Gillian W., 2024, The Scale Insects Of Iran (Hemiptera: Coccomorpha) Part 3 The Soft Scales (Coccidae) And Other Families, Zootaxa 5542 (1), pp. 1-202 : 63-64

Eulecanium rugulosum (Archangelskaya)

( Fig. 24 , distribution map Fig. 90E )

Lecanium rugulosum Archangelskaya, 1937: 46 . Eulecanium rugulosum (Archangelskaya) ; Borchsenius 1957: 395.

Field characteristics: Live adult female body oval, strongly convex, anterior almost perpendicular to substrate, also vertical or sharply sloping at posterior end; sides slightly convex, bent from below; dead female sometimes yellowish on sides, with numerous wrinkles and small concavities on dorsum.

Microscopic diagnosis: Slide-mounted adult female body oval, without stigmatic clefts; anal cleft fairly shallow.

Dorsum. Derm membranous in young females, becoming highly sclerotized at maturity. Setae spinose, scattered throughout. Pores present throughout. Preopercular pores and duct tubercles absent. Tubular ducts of 1 type present throughout, each with fairly long outer ductule, and distinctly shorter, narrower inner filament ending in a terminal gland. Anal plates together quadrate, each plate with 3 apical setae. Anal plates surrounded by a large, strongly sclerotized area.

Margin. Marginal setae tapering with sharp apices, thinner and more curved than stigmatic setae; marginal setae very sparse, with intervals between setae on sides of body 4‒10 times as long as setae, numbering about 24 on each side between anterior and posterior spiracular clefts. Stigmatic setae numbering 1 or 2 in each group, slightly shorter, straighter and blunter than marginal setae.

Venter. Derm completely membranous. Pregenital disc-pores each with 10 loculi, present around anogenital fold and in broad transverse bands across abdominal segments; also a few present laterally near each spiracular pore. Spiracular disc-pores each with 5 loculi, present in a narrow band between each spiracle and margin. Anterior and posterior spiracles large. Tubular ducts of 2 types: (i) small ducts each with a short inner ductule, present in a wide submarginal band along edge of entire body, also surrounding mouthparts; and (ii) smaller type with a longer inner ductule, similar to that on dorsum present medially on all abdominal and thoracic segments. Setae short and scattered, with 3 or 4 pairs between antennal bases, of which 2 pairs longer than the others. Legs each lacking a tibio-tarsal articulatory sclerosis; claw held at right-angles to tarsus, with denticle; claw and tarsal digitules all thin and with small apical dilations. Antennae each with 6 segments, third segment longest. Anal ring bearing 8 long, thick setae and partly with double row of pores.

Distribution: Eulecanium rugulosum is known only from Armenia, Iran, Kazakhstan, Kyrgyzstan, Tajikistan, Türkiye ( Turkey), Turkmenistan and Uzbekistan ( García Morales et al. 2016). In Iran, it is found in Fars and Kermanshah provinces ( Kaussari 1957).

Host-plants: The species has been recorded on host-plants in 22 genera belonging to 8 families but likes Rosaceous hosts ( García Morales et al. 2016). In Iran, it has been recorded on Pistacia khinjuk ( Anacardiaceae ) and Corylus avellana ( Betulaceae ) ( Moghaddam 2013).

Economic importance: There are no records of economic damage in Iran.

Natural enemies: None recorded in Iran.

Figures

FIGURE 24. Adult female of Eulecanium rugulosum (Arachangelskaya).

FIGURE 90. Distribution maps of scale insect species in Iran covered in this work. A, Drosicha turkestanica Archangelskaya; B, Ericerus farsicus Moghaddam & Faghih; C, Eriopeltis festucae (Boyer de Fonscolombe); D, Eulecanium ficiphilum Borchsenius; E, Eulecanium rugulosum (Archangelskaya); F, Eulecanium tiliae (Linnaeus); G, Exaeretopus tritici Williams; H, Gossyparia spuria (Modeer); I, Gueriniella serratulae (Fabricius); J, Hadzibejliaspis stipae (Hadzibejli); K, Icerya aegyptiaca (Douglas); L, Icerya purchasi Maskell.