Hoyicoccus Williams & Kozár

Kozár, Ferenc, Williams, Douglas J. & Benedicty, Zsuzsanna Konczné, 2009, A new genus and four new species of the scale insect family Eriococcidae (Hemiptera: Coccoidea) from the Austro-Oriental Region., Zootaxa 1979, pp. 1-15 : 2-5

Hoyicoccus Williams & Kozár gen. nov.

Type species: Hoyicoccus hendersonae Kozár & Williams sp. n.

Generic diagnosis. Body of adult female elongate oval, cuticle membranous. Ve n te r. Antennae 6 segmented, frontal tubercles present. Labium with segments II and III fused; basal segment with a pair of short robust setae. Stylet loop much longer than body. Quinquelocular pores of two sizes: smaller pores, sparsely scattered over most of surface; larger pores present in marginal groups on each of last 4 abdominal segments. Legs well developed, each tibia about as long as tarsus, midcoxae and hindcoxae with spinulae on anterior surfaces, hindcoxae with large, irregularly-shaped translucent pores on posterior surfaces. Macrotubular ducts present, of 2 sizes: larger ducts each with inner ductule longer than main ductule and with a flower-shaped terminal gland; and smaller ducts each with short filamentous ductule. Cruciform pores absent. Spine-like setae present around submargin. Venter of each anal lobe with 1 subapical seta. Suranal setae hair-like. Dorsum. Spine-like setae robust, present in rows on all segments, not differentiated from marginal setae. Anal lobes well developed, each with 3 robust spine-like setae plus a long flagellate apical seta. Anal ring with 6 anal ring setae, each about twice length of ring; anal ring pores few in a single row. Cauda present. Quinquelocular pores of large type, similar to larger loculate pores on venter, present in 13 compact groups around margins, each on an area of sclerotised derm. Macrotubular ducts absent. Microtubular duct present, few, elongate. Most of cuticle minutely nodulose.

Comments. The main diagnostic characters of this genus are the compact groups of large-sized quinquelocular pores on the margins of the dorsum and on the posterior ventral abdominal segments. Hoyicoccus is probably most similar to Phacelococcus Miller , as defined by Gullan & Strong (1997) and Hardy & Gullan (2007), another genus with groups of quinquelocular pores but, on Phacelococcus , these pores are on the venter only, are smaller and more widespread. Hoyicoccus also differs from Phacelococcus in the possession of frontal tubercles, or lobes, and in having each macrotubular duct with a simple filamentous inner ductule. In addition, the anal lobes of Hoyicoccus hendersonae are well developed, whereas those on Phacelococcus species they are small, rounded and barely discernible. Clusters of quinquelocular pores are also present on species of the family Dactylopiidae and in the second-instar males of Danumococcus panosoreae Takagi & Hodgson, as discussed by Takagi & Hodgson (2005).

Although the external appearance of Hoyicoccus in life is not yet known, it is likely that species in this genus secrete strong wax filaments around the margin.

Etymology. The genus is named after J. M. Hoy for his work on the Eriococcidae , particularly of New Zealand. His name is added to the genus Coccus , a suffix of many genera in the Eriococcidae .

Hoyicoccus hendersonae Kozár & Williams sp. nov. ( Fig. 1 )

Type material. Holotype adult female, Malaysia, Sabah, West Coast Residency, Mt Kinabalu, Bukit Utah Trail, 1850 m, in soil, extracted by Berlese funnel, 28.iv.1982, B. Hauser, IIE, Sab 82/17 ( BMNH).

Paratype adult female, on a separate slide, same data as holotype ( BMNH).

Adult female. Body of slide-mounted specimens, elongate-oval, 0.68–0.71 mm long, 0.32–0.35 mm wide. Antennae 6 segmented; segment lengths (µm) I 19– 20, II 20–21, III 19, IV 8–11, V 11– 16,VI 26–29; all segments with few setae, second segment with 1 sensory pore, segment III almost parallel sided; segment VI with apical seta 51–54 µm long, and with 4 sensory falcate setae, each 25–28 µm long, segments IV and V each with single falcate seta, each 18–28 µm long. Frontal tubercles present. Eyes present on ventral margin.

Venter. Labium 2 segmented, 42–45 µm long, segments II and III apparently fused; basal segment not well developed, with 1 pair of robust setae. Stylet loop much longer than body. Legs well developed (lengths in µm), forecoxae 33–34, trochanter 24–25, femur 60–68, tibia 42–46, tarsus 49–52, claw 17–20; midcoxae 36–40, trochanter 25–27, femur 64–70, tibia 41–49, tarsus 44–51, claw 17–20; hindcoxae 40–44, trochanter 25–27, femur 61–70, tibia 45–50, tarsus 50–56; tarsal digitules knobbed, each 26–32; claw 17–20; claw digitules each 18–20, slightly knobbed. Mid- and hindcoxae with spinulae on anterior surfaces, hindcoxae with large irregularly-shaped translucent pores on posterior surface. Each trochanter with 2 sensory pores on each surface. Claws each with a denticle. All legs with a few setae, all flagellate, and with a sensory pore on tarsus near articulation with tibia. Spiracles each 11–12 µm in diameter, with a group of quinquelocular pores present near each spiracular opening. Quinquelocular pores of 2 sizes; smaller pores, each 4 µm in diameter, scattered sparsely over much of surface but most abundant on posterior abdominal segments; larger pores present in marginal groups on abdominal segment V–VIII. Spine-like setae scattered submarginally on abdomen, each about 11 µm long and with finer spinose setae medially on abdomen. Flagellate setae, mostly 25–27 µm long, present on head and thorax. Cruciform pores absent. Macrotubular ducts of 2 sizes; larger about 2 µm wide, 14 µm long,, only on the last abdominal sternites; smaller ducts present on all segments; all ducts with a sclerotized rim surrounding orifice, particularly discernible on larger ducts; inner ductule of larger type of duct longer than duct, ending in a flower-shaped gland. Oviduct or internal genital organ barely discernible. Ventral anal lobe with a hair-like subapical setae, plus and a similar suranal setae.

Dorsum. Setae robust, spine-like, rather variable in size, each 11–26 µm long, present mostly in single rows across segments, plus 1 or 2 present on margin of each segment, these not differentiated from larger dorsal setae. Macrotubular ducts absent. Microtubular ducts present, each about 8 µm long and less than 1 µm wide, with a normal orifice; scattered among dorsal setae. Quinquelocular pores of larger type, similar to those on venter, present in 13 compact clusters marginally, all on sclerotised areas of derm. Anal ring dorsal, well developed, 21–31 µm wide, 24–26 µm long, with single row of pores plus 6 anal ring setae, each 54–57 µm long. Anal lobes well developed, each as wide as long, heavily sclerotized, with 2 spine-like setae on inner margin, each 15–28 µm long, plus 1 spine-like seta on outer margin, 10–12 µm long. Apical setae each 90–104 µm long. Cauda present, 28–31 µm wide. Most of dorsal surface covered in minute, slightly sclerotized nodules.

Comments. Main diagnostic features discussed under generic diagnosis above.

Etymology. The species is named after Rosa Henderson, Landcare Research, Auckland, New Zealand, for her work on the scale insect fauna of New Zealand.

Figures

FIGURE 1. Hoyicoccus hendersonae Kozár & Williams sp. n. Adult female.