Coccus Linnaeus, 1758

Choi, Jinyeong, Soysouvanh, Pheophanh, Lee, Seunghwan & Hong, Ki-Jeong, 2018, Review of the family Coccidae (Hemiptera: Coccomorpha) in Laos, Zootaxa 4460 (1), pp. 1-62 : 20-22

Genus Coccus Linnaeus, 1758

Type species: Coccus hesperidum Linnaeus, 1758 , designated by Opinion 1303 (1985). Diagnosis. Dorsal setae spinose, pointed, blunt or cylindrical ( Figs 17C , 19B , 23D , 25E , 27D , 29A ) (except in C. formicarii , in which they are setose, Fig. 21C ). Marginal setae with pointed or fimbriate apices ( Figs 17J , 19J , 20C , 21B , 23M , 25A , 26C , 27B , 28C , 29I ). Venter with tubular ducts usually present on medial area of thorax or distributed in submarginal area ( Figs 17G , 19F , 21I , 23L , 25M , 27K , 29L ); and legs each with a tibio-tarsal articulatory sclerosis ( Figs 22E , 23I , 24E , 25L , 26E , 27H , 28F , 29M ) (except in C. capparidis and C. formicarii , Figs 17H , 20E , 21H ) ( Hodgson 1994; Wang & Feng 2012a).

Remarks. Coccus is a large genus, comprising about 111 described species from all zoogeographical regions ( García Morales et al. 2016). Adult females of the genus are easily recognized by the presence of ventral tubular ducts mainly in the medial area of the thorax and legs each with a tibio-tarsal articulatory sclerosis ( Hodgson 1994).

Figures

FIGURE 17. Coccus capparidis (Green, 1904), adult female, from Williams & Watson (1990). A, dorsal microduct; B, dorsal tubercle; C, dorsal seta; D, preopercular pore; E, anal plates; F, multilocular disc-pore; G, ventral tubular duct; H, leg; I, spiracular disc-pore; J, stigmatic spines and marginal setae; K, antenna.

FIGURE 19. Coccus celatus De Lotto, 1960, adult female, from Williams & Watson (1990). A, dermal areolations and dorsal microduct; B, dorsal seta; C, preopercular pore; D, dorsal tubercle; E, multilocular disc-pore; F1–2, ventral tubular ducts; G, ventral microduct; H, simple pore; I, spiracular disc-pore; J, stigmatic spines and marginal setae.

FIGURE 20. Coccus formicarii (Green, 1896). A, population of females in life; B, slide-mounted adult female; C, marginal setae; D, ventral tubular ducts between mesocoxae; E, leg. Scale lines for B = 0.5 mm; C = 50 µm; D = 10 µm; E = 100 µm.

FIGURE 21. Coccus formicarii (Green, 1896), adult female, from Lin et al. (2013). A, stigmatic spines; B, marginal seta; C, dorsal seta; D, preopercular pore; E, dorsal microduct; F, anal plates; G, multilocular disc-pore; H, leg; I1-2, ventral tubular ducts; J, ventral microduct; K, spiracular disc-pore; L, antenna.

FIGURE 22. Coccus gymnospori (Green, 1908). A, adult females in life; B, slide-mounted adult female; C, antenna; D, ventral tubular ducts between mesocoxae; E, leg (Arrow indicates a tibio-tarsal articulatory sclerosis). Scale lines for B = 0.5 mm; C, E = 100 µm; D = 10 µm.

FIGURE 23. Coccus gymnospori (Green, 1908), adult female, from Ben-Dov (1981). A, dorsal tubercle; B, dorsal microduct; C, dorsal tubular duct; D, dorsal seta; E, preopercular pore; F, anal plates; G, multilocular disc-pore; H, ventral microduct; I, leg; J, ventral seta; K, spiracular disc-pore; L, ventral tubular duct; M, stigmatic spines and marginal setae.

FIGURE 24. Coccus hesperidum Linnaeus, 1758. A, population of females in life; B, slide-mounted adult female; C, antenna; D, ventral tubular ducts near mesocoxa; E, leg (Arrow indicates a tibio-tarsal articulatory sclerosis). Scale lines for B = 0.5 mm; C, E = 100 µm; D = 10 µm.

FIGURE 25. Coccus hesperidum Linnaeus, 1758, adult female, from Lin et al. (2013). A, marginal setae; B, dorsal tubercle; C, stigmatic spines; D, dorsal microduct; E, dorsal seta; F, dorsal tubular duct; G, preopercular pore; H, anal plates; I, multilocular disc-pore; J, anal ring; K, ventral seta; L, leg; M, ventral tubular duct; N, ventral microduct; O, spiracular disc-pore; P, antenna.

FIGURE 26. Coccus latioperculatum (Green, 1922). A, population of females in life; B, slide-mounted adult female; C, marginal setae; D, ventral tubular ducts near mesocoxa; E, leg. Scale lines for B = 0.5 mm; C = 50 µm; D = 10 µm; E = 100 µm.

FIGURE 27. Coccus latioperculatum (Green, 1922), adult female, from Avasthi & Shafee (1991). A, dermal areolations; B, marginal setae; C1-2, stigmatic spines; D, dorsal setae; E, preopercular pore; F, anal plates; G, multilocular disc-pore; H, leg; I, spiracular disc-pore; J, ventral seta; K, ventral tubular duct; L, antenna.

FIGURE 28. Coccus viridis (Green, 1889). A, population of females in life; B, slide-mounted adult female; C, marginal setae; D, antenna; E, ventral tubular ducts between mesocoxae; F, leg (Arrow indicates a tibio-tarsal articulatory sclerosis). Scale lines for B = 0.5 mm; C = 50 µm; D, F = 100 µm; E = 10 µm.

FIGURE 29. Coccus viridis (Green, 1889), adult female, from Williams & Watson (1990). A, dorsal seta; B, dorsal microduct; C, stigmatic spines; D, simple pore; E, preopercular pore; F, dorsal tubercle; G, anal plates; H, multilocular disc-pore; I, marginal seta; J, ventral microduct; K, anterior and lateral marginal setae on anogenital fold; L, ventral tubular duct; M, leg; N, spiracular disc-pore; O, antenna.