Eurycoccus tamariscus Williams

MOGHADDAM, MASUMEH & WATSON, GILLIAN W., 2022, The Scale Insects Of Iran (Hemiptera: Coccomorpha) Part 2 The Mealybugs (Pseudococcidae And Rhizoecidae) And Putoidae, Zootaxa 5126 (1), pp. 1-169 : 56-58

Eurycoccus tamariscus Williams

( Fig. 20 , distribution map Fig. 67 G )

Eurycoccus tamariscus Williams, 1984: 538 .

Field characteristics: Not recorded.

Microscopic diagnosis: Slide-mounted adult female broadly oval, membranous. Anal lobe well developed. Antennae each with 6 segments. Legs well developed, hind coxa with proximal edge indistinct; tarsal digitules pointed at tip and longer than claw. Translucent pores present on both ventral and dorsal surfaces of hind coxa, and on dorsal surface of hind tibia. Hind tibia + tarsus noticeably shorter than hind trochanter + femur. Cerarii present only on anal lobes, each bearing 2 flagellate setae, each stouter than surrounding setae. Circulus absent. Ostioles well developed. Spiracles large, situated near lateral margins.

Dorsum with flagellate setae, some on margins longer than those present in medial areas. Trilocular pores evenly distributed. Microducts present ( Fig. 20 ).

Venter with setae similar to those on dorsum. Multilocular disc pores each with 10 loculi, present posterior to vulva and in median transverse rows on posterior edges of abdominal segments IV–VII, with some reaching marginal areas. Trilocular pores evenly distributed. Discoidal pores, each with a thick rim, scattered. Oral collar tubular ducts each about as wide as a trilocular pore or slightly wider, sparse, 1 or 2 present submedially or marginally on segments VI and VII.

Distribution: Eurycoccus tamariscus has been recorded from Iran and Pakistan ( Moghaddam 2009a; Williams 1984).

Host-plants: The species has been recorded on host-plants in the genus Tamarix , belonging to the family Tamaricaceae ( García Morales et al. 2016) .

Economic importance: None.

Natural enemies: None recorded.

Comments: The accompanying illustration is reproduced from Williams (2004), page 239, Fig. 96, with kind permission from the author and the Trustees of the Natural History Museum, London, U.K.

Genus EXALLOMOCHLUS Williams

Exallomochlus Williams, 2004: 240 . Type species: Pseudococcus hispidus Morrison by original designation.

Principal characters: Slide-mounted adult female broadly oval, membranous. Anal lobes moderately developed, each with large dorsal sclerotized area occupying most of lobe; venter of lobe also with a large sclerotized area, its inner margin more heavily sclerotized to form a bar-like structure not arising from the apical seta or a bar seta. Antennae each with 7 or 8 segments. Cerarii numbering 18 pairs, each always containing a concentration of trilocular pores; some cerarii on abdomen each bearing more than 2 setae. Cerarian setae either conical and stout, sometimes with flagellate tips, or elongate and blunt with tip often bent. Anal lobe cerarii each bearing either 2 or a few more setae. Circulus present, divided by an intersegmental line. Both pairs of ostioles well developed. Legs well developed, hind leg with translucent pores on coxa and tibia. Claw stout, without a denticle; tarsal digitules knobbed. Multilocular disc pores present on venter. Trilocular pores evenly distributed. Discoidal pores present, regular, either circular or like minute pegs. Oral collar tubular ducts present on venter.Anal ring situated on dorsum, a short distance from apex of abdomen.

Comments: Worldwide, seven species are included in Exallomochlus ( García Morales et al. 2016) ; one species is known from Iran ( Moghaddam 2013a).

Figures

FIGURE 20. Adult female of Eurycoccus tamariscus Williams. © The Trustees of the Natural History Museum, London, U.K.

FIGURE 67. Maps of species distributions in Iran.A. Dysmicoccus brevipes (Cockerell); B. Dysmicoccus caspianensis Moghaddam; C. Dysmicoccus walkeri (Newstead); D. Dysmicoccus zagrosicus Moghaddam; E. Erimococcus kimmericus (Kiritshenko); F. Erimococcus talhouki (Matile-Ferrero); G. Eurycoccus tamariscus Williams; H. Exallomochlus balouchestanensis Moghaddam; I. Ferrisia virgata (Cockerell); J. Formicococcus robustus (Ezzat & McConnell); K. Kiritshenkella sacchari (Green); L. Maconellicoccus hirsutus (Green).